Method: urlMaps.get

Returns the specified UrlMap resource.

HTTP request

GET https://compute.googleapis.com/compute/v1/projects/{project}/global/urlMaps/{urlMap}

The URL uses gRPC Transcoding syntax.

Path parameters

Parameters
project

string

Project ID for this request.
urlMap

string

Name of the UrlMap resource to return.

Request body

The request body must be empty.

Response body

Represents a URL Map resource.

Compute Engine has two URL Map resources:

A URL map resource is a component of certain types of cloud load balancers and Traffic Director:

  • urlMaps are used by global external Application Load Balancers, classic Application Load Balancers, and cross-region internal Application Load Balancers.
  • regionUrlMaps are used by internal Application Load Balancers, regional external Application Load Balancers and regional internal Application Load Balancers.

For a list of supported URL map features by the load balancer type, see the Load balancing features: Routing and traffic management table.

For a list of supported URL map features for Traffic Director, see the Traffic Director features: Routing and traffic management table.

This resource defines mappings from hostnames and URL paths to either a backend service or a backend bucket.

To use the global urlMaps resource, the backend service must have a loadBalancingScheme of either EXTERNAL, EXTERNAL_MANAGED, or INTERNAL_SELF_MANAGED. To use the regionUrlMaps resource, the backend service must have a loadBalancingScheme of INTERNAL_MANAGED. For more information, read URL Map Concepts.

If successful, the response body contains data with the following structure:

JSON representation 
{
  "kind": string,
  "id": string,
  "creationTimestamp": string,
  "name": string,
  "description": string,
  "selfLink": string,
  "hostRules": [
    {
      "description": string,
      "hosts": [
        string
      ],
      "pathMatcher": string
    }
  ],
  "pathMatchers": [
    {
      "name": string,
      "description": string,
      "defaultService": string,
      "defaultRouteAction": {
        "weightedBackendServices": [
          {
            "backendService": string,
            "weight": integer,
            "headerAction": {
              "requestHeadersToRemove": [
                string
              ],
              "requestHeadersToAdd": [
                {
                  "headerName": string,
                  "headerValue": string,
                  "replace": boolean
                }
              ],
              "responseHeadersToRemove": [
                string
              ],
              "responseHeadersToAdd": [
                {
                  "headerName": string,
                  "headerValue": string,
                  "replace": boolean
                }
              ]
            }
          }
        ],
        "urlRewrite": {
          "pathPrefixRewrite": string,
          "hostRewrite": string,
          "pathTemplateRewrite": string
        },
        "timeout": {
          "seconds": string,
          "nanos": integer
        },
        "retryPolicy": {
          "retryConditions": [
            string
          ],
          "numRetries": integer,
          "perTryTimeout": {
            "seconds": string,
            "nanos": integer
          }
        },
        "requestMirrorPolicy": {
          "backendService": string
        },
        "corsPolicy": {
          "allowOrigins": [
            string
          ],
          "allowOriginRegexes": [
            string
          ],
          "allowMethods": [
            string
          ],
          "allowHeaders": [
            string
          ],
          "exposeHeaders": [
            string
          ],
          "maxAge": integer,
          "allowCredentials": boolean,
          "disabled": boolean
        },
        "faultInjectionPolicy": {
          "delay": {
            "fixedDelay": {
              "seconds": string,
              "nanos": integer
            },
            "percentage": number
          },
          "abort": {
            "httpStatus": integer,
            "percentage": number
          }
        },
        "maxStreamDuration": {
          "seconds": string,
          "nanos": integer
        }
      },
      "defaultUrlRedirect": {
        "hostRedirect": string,
        "pathRedirect": string,
        "prefixRedirect": string,
        "redirectResponseCode": enum,
        "httpsRedirect": boolean,
        "stripQuery": boolean
      },
      "pathRules": [
        {
          "service": string,
          "routeAction": {
            "weightedBackendServices": [
              {
                "backendService": string,
                "weight": integer,
                "headerAction": {
                  "requestHeadersToRemove": [
                    string
                  ],
                  "requestHeadersToAdd": [
                    {
                      "headerName": string,
                      "headerValue": string,
                      "replace": boolean
                    }
                  ],
                  "responseHeadersToRemove": [
                    string
                  ],
                  "responseHeadersToAdd": [
                    {
                      "headerName": string,
                      "headerValue": string,
                      "replace": boolean
                    }
                  ]
                }
              }
            ],
            "urlRewrite": {
              "pathPrefixRewrite": string,
              "hostRewrite": string,
              "pathTemplateRewrite": string
            },
            "timeout": {
              "seconds": string,
              "nanos": integer
            },
            "retryPolicy": {
              "retryConditions": [
                string
              ],
              "numRetries": integer,
              "perTryTimeout": {
                "seconds": string,
                "nanos": integer
              }
            },
            "requestMirrorPolicy": {
              "backendService": string
            },
            "corsPolicy": {
              "allowOrigins": [
                string
              ],
              "allowOriginRegexes": [
                string
              ],
              "allowMethods": [
                string
              ],
              "allowHeaders": [
                string
              ],
              "exposeHeaders": [
                string
              ],
              "maxAge": integer,
              "allowCredentials": boolean,
              "disabled": boolean
            },
            "faultInjectionPolicy": {
              "delay": {
                "fixedDelay": {
                  "seconds": string,
                  "nanos": integer
                },
                "percentage": number
              },
              "abort": {
                "httpStatus": integer,
                "percentage": number
              }
            },
            "maxStreamDuration": {
              "seconds": string,
              "nanos": integer
            }
          },
          "urlRedirect": {
            "hostRedirect": string,
            "pathRedirect": string,
            "prefixRedirect": string,
            "redirectResponseCode": enum,
            "httpsRedirect": boolean,
            "stripQuery": boolean
          },
          "paths": [
            string
          ],
          "customErrorResponsePolicy": {
            "errorResponseRules": [
              {
                "matchResponseCodes": [
                  string
                ],
                "path": string,
                "overrideResponseCode": integer
              }
            ],
            "errorService": string
          }
        }
      ],
      "routeRules": [
        {
          "priority": integer,
          "description": string,
          "matchRules": [
            {
              "prefixMatch": string,
              "fullPathMatch": string,
              "regexMatch": string,
              "ignoreCase": boolean,
              "headerMatches": [
                {
                  "headerName": string,
                  "exactMatch": string,
                  "regexMatch": string,
                  "rangeMatch": {
                    "rangeStart": string,
                    "rangeEnd": string
                  },
                  "presentMatch": boolean,
                  "prefixMatch": string,
                  "suffixMatch": string,
                  "invertMatch": boolean
                }
              ],
              "queryParameterMatches": [
                {
                  "name": string,
                  "presentMatch": boolean,
                  "exactMatch": string,
                  "regexMatch": string
                }
              ],
              "metadataFilters": [
                {
                  "filterMatchCriteria": enum,
                  "filterLabels": [
                    {
                      "name": string,
                      "value": string
                    }
                  ]
                }
              ],
              "pathTemplateMatch": string
            }
          ],
          "service": string,
          "routeAction": {
            "weightedBackendServices": [
              {
                "backendService": string,
                "weight": integer,
                "headerAction": {
                  "requestHeadersToRemove": [
                    string
                  ],
                  "requestHeadersToAdd": [
                    {
                      "headerName": string,
                      "headerValue": string,
                      "replace": boolean
                    }
                  ],
                  "responseHeadersToRemove": [
                    string
                  ],
                  "responseHeadersToAdd": [
                    {
                      "headerName": string,
                      "headerValue": string,
                      "replace": boolean
                    }
                  ]
                }
              }
            ],
            "urlRewrite": {
              "pathPrefixRewrite": string,
              "hostRewrite": string,
              "pathTemplateRewrite": string
            },
            "timeout": {
              "seconds": string,
              "nanos": integer
            },
            "retryPolicy": {
              "retryConditions": [
                string
              ],
              "numRetries": integer,
              "perTryTimeout": {
                "seconds": string,
                "nanos": integer
              }
            },
            "requestMirrorPolicy": {
              "backendService": string
            },
            "corsPolicy": {
              "allowOrigins": [
                string
              ],
              "allowOriginRegexes": [
                string
              ],
              "allowMethods": [
                string
              ],
              "allowHeaders": [
                string
              ],
              "exposeHeaders": [
                string
              ],
              "maxAge": integer,
              "allowCredentials": boolean,
              "disabled": boolean
            },
            "faultInjectionPolicy": {
              "delay": {
                "fixedDelay": {
                  "seconds": string,
                  "nanos": integer
                },
                "percentage": number
              },
              "abort": {
                "httpStatus": integer,
                "percentage": number
              }
            },
            "maxStreamDuration": {
              "seconds": string,
              "nanos": integer
            }
          },
          "urlRedirect": {
            "hostRedirect": string,
            "pathRedirect": string,
            "prefixRedirect": string,
            "redirectResponseCode": enum,
            "httpsRedirect": boolean,
            "stripQuery": boolean
          },
          "headerAction": {
            "requestHeadersToRemove": [
              string
            ],
            "requestHeadersToAdd": [
              {
                "headerName": string,
                "headerValue": string,
                "replace": boolean
              }
            ],
            "responseHeadersToRemove": [
              string
            ],
            "responseHeadersToAdd": [
              {
                "headerName": string,
                "headerValue": string,
                "replace": boolean
              }
            ]
          },
          "customErrorResponsePolicy": {
            "errorResponseRules": [
              {
                "matchResponseCodes": [
                  string
                ],
                "path": string,
                "overrideResponseCode": integer
              }
            ],
            "errorService": string
          }
        }
      ],
      "headerAction": {
        "requestHeadersToRemove": [
          string
        ],
        "requestHeadersToAdd": [
          {
            "headerName": string,
            "headerValue": string,
            "replace": boolean
          }
        ],
        "responseHeadersToRemove": [
          string
        ],
        "responseHeadersToAdd": [
          {
            "headerName": string,
            "headerValue": string,
            "replace": boolean
          }
        ]
      },
      "defaultCustomErrorResponsePolicy": {
        "errorResponseRules": [
          {
            "matchResponseCodes": [
              string
            ],
            "path": string,
            "overrideResponseCode": integer
          }
        ],
        "errorService": string
      }
    }
  ],
  "tests": [
    {
      "description": string,
      "host": string,
      "path": string,
      "headers": [
        {
          "name": string,
          "value": string
        }
      ],
      "service": string,
      "expectedOutputUrl": string,
      "expectedRedirectResponseCode": integer
    }
  ],
  "defaultService": string,
  "defaultRouteAction": {
    "weightedBackendServices": [
      {
        "backendService": string,
        "weight": integer,
        "headerAction": {
          "requestHeadersToRemove": [
            string
          ],
          "requestHeadersToAdd": [
            {
              "headerName": string,
              "headerValue": string,
              "replace": boolean
            }
          ],
          "responseHeadersToRemove": [
            string
          ],
          "responseHeadersToAdd": [
            {
              "headerName": string,
              "headerValue": string,
              "replace": boolean
            }
          ]
        }
      }
    ],
    "urlRewrite": {
      "pathPrefixRewrite": string,
      "hostRewrite": string,
      "pathTemplateRewrite": string
    },
    "timeout": {
      "seconds": string,
      "nanos": integer
    },
    "retryPolicy": {
      "retryConditions": [
        string
      ],
      "numRetries": integer,
      "perTryTimeout": {
        "seconds": string,
        "nanos": integer
      }
    },
    "requestMirrorPolicy": {
      "backendService": string
    },
    "corsPolicy": {
      "allowOrigins": [
        string
      ],
      "allowOriginRegexes": [
        string
      ],
      "allowMethods": [
        string
      ],
      "allowHeaders": [
        string
      ],
      "exposeHeaders": [
        string
      ],
      "maxAge": integer,
      "allowCredentials": boolean,
      "disabled": boolean
    },
    "faultInjectionPolicy": {
      "delay": {
        "fixedDelay": {
          "seconds": string,
          "nanos": integer
        },
        "percentage": number
      },
      "abort": {
        "httpStatus": integer,
        "percentage": number
      }
    },
    "maxStreamDuration": {
      "seconds": string,
      "nanos": integer
    }
  },
  "defaultUrlRedirect": {
    "hostRedirect": string,
    "pathRedirect": string,
    "prefixRedirect": string,
    "redirectResponseCode": enum,
    "httpsRedirect": boolean,
    "stripQuery": boolean
  },
  "headerAction": {
    "requestHeadersToRemove": [
      string
    ],
    "requestHeadersToAdd": [
      {
        "headerName": string,
        "headerValue": string,
        "replace": boolean
      }
    ],
    "responseHeadersToRemove": [
      string
    ],
    "responseHeadersToAdd": [
      {
        "headerName": string,
        "headerValue": string,
        "replace": boolean
      }
    ]
  },
  "defaultCustomErrorResponsePolicy": {
    "errorResponseRules": [
      {
        "matchResponseCodes": [
          string
        ],
        "path": string,
        "overrideResponseCode": integer
      }
    ],
    "errorService": string
  },
  "fingerprint": string,
  "region": string
}
Fields
kind

string

[Output Only] Type of the resource. Always compute#urlMaps for url maps.
id

string (uint64 format)

[Output Only] The unique identifier for the resource. This identifier is defined by the server.
creationTimestamp

string

[Output Only] Creation timestamp in RFC3339 text format.
name

string

Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression [a-z]([-a-z0-9]*[a-z0-9])? which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.
description

string

An optional description of this resource. Provide this property when you create the resource.
hostRules[]

object

The list of host rules to use against the URL.
hostRules[].description

string

An optional description of this resource. Provide this property when you create the resource.
hostRules[].hosts[]

string

The list of host patterns to match. They must be valid hostnames with optional port numbers in the format host:port. * matches any string of ([a-z0-9-.]*). In that case, * must be the first character, and if followed by anything, the immediate following character must be either - or ..

* based matching is not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
hostRules[].pathMatcher

string

The name of the PathMatcher to use to match the path portion of the URL if the hostRule matches the URL's host portion.
pathMatchers[]

object

The list of named PathMatchers to use against the URL.
pathMatchers[].name

string

The name to which this PathMatcher is referred by the HostRule.
pathMatchers[].description

string

An optional description of this resource. Provide this property when you create the resource.
pathMatchers[].defaultService

string

The full or partial URL to the BackendService resource. This URL is used if none of the pathRules or routeRules defined by this PathMatcher are matched. For example, the following are all valid URLs to a BackendService resource:

If defaultRouteAction is also specified, advanced routing actions, such as URL rewrites, take effect before sending the request to the backend. However, if defaultService is specified, defaultRouteAction cannot contain any weightedBackendServices. Conversely, if defaultRouteAction specifies any weightedBackendServices, defaultService must not be specified.

If defaultService is specified, then set either defaultUrlRedirect or defaultRouteAction.weightedBackendService. Don't set both.

Authorization requires one or more of the following Google IAM permissions on the specified resource defaultService:

  • compute.backendBuckets.use
  • compute.backendServices.use
pathMatchers[].defaultRouteAction

object

defaultRouteAction takes effect when none of the pathRules or routeRules match. The load balancer performs advanced routing actions, such as URL rewrites and header transformations, before forwarding the request to the selected backend. If defaultRouteAction specifies any weightedBackendServices, defaultService must not be set. Conversely if defaultService is set, defaultRouteAction cannot contain any weightedBackendServices.

If defaultRouteAction is specified, don't set defaultUrlRedirect. If defaultRouteAction.weightedBackendServices is specified, don't set defaultService.

URL maps for classic Application Load Balancers only support the urlRewrite action within a path matcher's defaultRouteAction.
pathMatchers[].defaultRouteAction.weightedBackendServices[]

object

A list of weighted backend services to send traffic to when a route match occurs. The weights determine the fraction of traffic that flows to their corresponding backend service. If all traffic needs to go to a single backend service, there must be one weightedBackendService with weight set to a non-zero number.

After a backend service is identified and before forwarding the request to the backend service, advanced routing actions such as URL rewrites and header transformations are applied depending on additional settings specified in this HttpRouteAction.
pathMatchers[].defaultRouteAction.weightedBackendServices[].backendService

string

The full or partial URL to the default BackendService resource. Before forwarding the request to backendService, the load balancer applies any relevant headerActions specified as part of this backendServiceWeight.
pathMatchers[].defaultRouteAction.weightedBackendServices[].weight

integer (uint32 format)

Specifies the fraction of traffic sent to a backend service, computed as weight / (sum of all weightedBackendService weights in routeAction) .

The selection of a backend service is determined only for new traffic. Once a user's request has been directed to a backend service, subsequent requests are sent to the same backend service as determined by the backend service's session affinity policy. Don't configure session affinity if you're using weighted traffic splitting. If you do, the weighted traffic splitting configuration takes precedence.

The value must be from 0 to 1000.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction

object

Specifies changes to request and response headers that need to take effect for the selected backendService.

headerAction specified here take effect before headerAction in the enclosing HttpRouteRule, PathMatcher and UrlMap.

headerAction is not supported for load balancers that have their loadBalancingScheme set to EXTERNAL.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToRemove[]

string

A list of header names for headers that need to be removed from the request before forwarding the request to the backendService.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[]

object

Headers to add to a matching request before forwarding the request to the backendService.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToRemove[]

string

A list of header names for headers that need to be removed from the response before sending the response back to the client.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[]

object

Headers to add the response before sending the response back to the client.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].defaultRouteAction.urlRewrite

object

The spec to modify the URL of the request, before forwarding the request to the matched service.

urlRewrite is the only action supported in UrlMaps for classic Application Load Balancers.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].defaultRouteAction.urlRewrite.pathPrefixRewrite

string

Before forwarding the request to the selected backend service, the matching portion of the request's path is replaced by pathPrefixRewrite.

The value must be from 1 to 1024 characters.
pathMatchers[].defaultRouteAction.urlRewrite.hostRewrite

string

Before forwarding the request to the selected service, the request's host header is replaced with contents of hostRewrite.

The value must be from 1 to 255 characters.
pathMatchers[].defaultRouteAction.urlRewrite.pathTemplateRewrite

string

If specified, the pattern rewrites the URL path (based on the :path header) using the HTTP template syntax.

A corresponding pathTemplateMatch must be specified. Any template variables must exist in the pathTemplateMatch field.

  • -At least one variable must be specified in the pathTemplateMatch field
  • You can omit variables from the rewritten URL
  • The * and ** operators cannot be matched unless they have a corresponding variable name - e.g. {format=*} or {var=**}.

For example, a pathTemplateMatch of /static/{format=**} could be rewritten as /static/content/{format} to prefix /content to the URL. Variables can also be re-ordered in a rewrite, so that /{country}/{format}/{suffix=**} can be rewritten as /content/{format}/{country}/{suffix}.

At least one non-empty routeRules[].matchRules[].path_template_match is required.

Only one of pathPrefixRewrite or pathTemplateRewrite may be specified.
pathMatchers[].defaultRouteAction.timeout

object

Specifies the timeout for the selected route. Timeout is computed from the time the request has been fully processed (known as end-of-stream) up until the response has been processed. Timeout includes all retries.

If not specified, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].defaultRouteAction.timeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].defaultRouteAction.timeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].defaultRouteAction.retryPolicy

object

Specifies the retry policy associated with this route.
pathMatchers[].defaultRouteAction.retryPolicy.retryConditions[]

string

Specifies one or more conditions when this retry policy applies. Valid values are:

  • 5xx: retry is attempted if the instance or endpoint responds with any 5xx response code, or if the instance or endpoint does not respond at all. For example, disconnects, reset, read timeout, connection failure, and refused streams.
  • gateway-error: Similar to 5xx, but only applies to response codes 502, 503 or 504.
  • connect-failure: a retry is attempted on failures connecting to the instance or endpoint. For example, connection timeouts.
  • retriable-4xx: a retry is attempted if the instance or endpoint responds with a 4xx response code. The only error that you can retry is error code 409.
  • refused-stream: a retry is attempted if the instance or endpoint resets the stream with a REFUSED_STREAM error code. This reset type indicates that it is safe to retry.
  • cancelled: a retry is attempted if the gRPC status code in the response header is set to cancelled.
  • deadline-exceeded: a retry is attempted if the gRPC status code in the response header is set to deadline-exceeded.
  • internal: a retry is attempted if the gRPC status code in the response header is set to internal.
  • resource-exhausted: a retry is attempted if the gRPC status code in the response header is set to resource-exhausted.
  • unavailable: a retry is attempted if the gRPC status code in the response header is set to unavailable.

Only the following codes are supported when the URL map is bound to target gRPC proxy that has validateForProxyless field set to true.

  • cancelled
  • deadline-exceeded
  • internal
  • resource-exhausted
  • unavailable
pathMatchers[].defaultRouteAction.retryPolicy.numRetries

integer (uint32 format)

Specifies the allowed number retries. This number must be > 0. If not specified, defaults to 1.
pathMatchers[].defaultRouteAction.retryPolicy.perTryTimeout

object

Specifies a non-zero timeout per retry attempt.

If not specified, will use the timeout set in the HttpRouteAction field. If timeout in the HttpRouteAction field is not set, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].defaultRouteAction.retryPolicy.perTryTimeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].defaultRouteAction.retryPolicy.perTryTimeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].defaultRouteAction.requestMirrorPolicy

object

Specifies the policy on how requests intended for the route's backends are shadowed to a separate mirrored backend service. The load balancer does not wait for responses from the shadow service. Before sending traffic to the shadow service, the host / authority header is suffixed with -shadow.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].defaultRouteAction.requestMirrorPolicy.backendService

string

The full or partial URL to the BackendService resource being mirrored to.

The backend service configured for a mirroring policy must reference backends that are of the same type as the original backend service matched in the URL map.

Serverless NEG backends are not currently supported as a mirrored backend service.
pathMatchers[].defaultRouteAction.corsPolicy

object

The specification for allowing client-side cross-origin requests. For more information about the W3C recommendation for cross-origin resource sharing (CORS), see Fetch API Living Standard.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].defaultRouteAction.corsPolicy.allowOrigins[]

string

Specifies the list of origins that is allowed to do CORS requests.

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.
pathMatchers[].defaultRouteAction.corsPolicy.allowOriginRegexes[]

string

Specifies a regular expression that matches allowed origins. For more information, see regular expression syntax .

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.

Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
pathMatchers[].defaultRouteAction.corsPolicy.allowMethods[]

string

Specifies the content for the Access-Control-Allow-Methods header.
pathMatchers[].defaultRouteAction.corsPolicy.allowHeaders[]

string

Specifies the content for the Access-Control-Allow-Headers header.
pathMatchers[].defaultRouteAction.corsPolicy.exposeHeaders[]

string

Specifies the content for the Access-Control-Expose-Headers header.
pathMatchers[].defaultRouteAction.corsPolicy.maxAge

integer

Specifies how long results of a preflight request can be cached in seconds. This field translates to the Access-Control-Max-Age header.
pathMatchers[].defaultRouteAction.corsPolicy.allowCredentials

boolean

In response to a preflight request, setting this to true indicates that the actual request can include user credentials. This field translates to the Access-Control-Allow-Credentials header.

Default is false.
pathMatchers[].defaultRouteAction.corsPolicy.disabled

boolean

If true, disables the CORS policy. The default value is false, which indicates that the CORS policy is in effect.
pathMatchers[].defaultRouteAction.faultInjectionPolicy

object

The specification for fault injection introduced into traffic to test the resiliency of clients to backend service failure. As part of fault injection, when clients send requests to a backend service, delays can be introduced by a load balancer on a percentage of requests before sending those requests to the backend service. Similarly requests from clients can be aborted by the load balancer for a percentage of requests. timeout and retryPolicy is ignored by clients that are configured with a faultInjectionPolicy if: 1. The traffic is generated by fault injection AND 2. The fault injection is not a delay fault injection. Fault injection is not supported with the classic Application Load Balancer . To see which load balancers support fault injection, see Load balancing: Routing and traffic management features.
pathMatchers[].defaultRouteAction.faultInjectionPolicy.delay

object

The specification for how client requests are delayed as part of fault injection, before being sent to a backend service.
pathMatchers[].defaultRouteAction.faultInjectionPolicy.delay.fixedDelay

object

Specifies the value of the fixed delay interval.
pathMatchers[].defaultRouteAction.faultInjectionPolicy.delay.fixedDelay.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].defaultRouteAction.faultInjectionPolicy.delay.fixedDelay.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].defaultRouteAction.faultInjectionPolicy.delay.percentage

number

The percentage of traffic for connections, operations, or requests for which a delay is introduced as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
pathMatchers[].defaultRouteAction.faultInjectionPolicy.abort

object

The specification for how client requests are aborted as part of fault injection.
pathMatchers[].defaultRouteAction.faultInjectionPolicy.abort.httpStatus

integer (uint32 format)

The HTTP status code used to abort the request.

The value must be from 200 to 599 inclusive.

For gRPC protocol, the gRPC status code is mapped to HTTP status code according to this mapping table. HTTP status 200 is mapped to gRPC status UNKNOWN. Injecting an OK status is currently not supported by Traffic Director.
pathMatchers[].defaultRouteAction.faultInjectionPolicy.abort.percentage

number

The percentage of traffic for connections, operations, or requests that is aborted as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
pathMatchers[].defaultRouteAction.maxStreamDuration

object

Specifies the maximum duration (timeout) for streams on the selected route. Unlike the timeout field where the timeout duration starts from the time the request has been fully processed (known as end-of-stream), the duration in this field is computed from the beginning of the stream until the response has been processed, including all retries. A stream that does not complete in this duration is closed.

If not specified, this field uses the maximum maxStreamDuration value among all backend services associated with the route.

This field is only allowed if the Url map is used with backend services with loadBalancingScheme set to INTERNAL_SELF_MANAGED.
pathMatchers[].defaultRouteAction.maxStreamDuration.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].defaultRouteAction.maxStreamDuration.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].defaultUrlRedirect

object

When none of the specified pathRules or routeRules match, the request is redirected to a URL specified by defaultUrlRedirect.

If defaultUrlRedirect is specified, then set either defaultService or defaultRouteAction. Don't set both.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].defaultUrlRedirect.hostRedirect

string

The host that is used in the redirect response instead of the one that was supplied in the request.

The value must be from 1 to 255 characters.
pathMatchers[].defaultUrlRedirect.pathRedirect

string

The path that is used in the redirect response instead of the one that was supplied in the request.

pathRedirect cannot be supplied together with prefixRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
pathMatchers[].defaultUrlRedirect.prefixRedirect

string

The prefix that replaces the prefixMatch specified in the HttpRouteRuleMatch, retaining the remaining portion of the URL before redirecting the request.

prefixRedirect cannot be supplied together with pathRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
pathMatchers[].defaultUrlRedirect.redirectResponseCode

enum

The HTTP Status code to use for this RedirectAction.

Supported values are:

  • MOVED_PERMANENTLY_DEFAULT, which is the default value and corresponds to 301.
  • FOUND, which corresponds to 302.
  • SEE_OTHER which corresponds to 303.
  • TEMPORARY_REDIRECT, which corresponds to 307. In this case, the request method is retained.
  • PERMANENT_REDIRECT, which corresponds to 308. In this case, the request method is retained.
pathMatchers[].defaultUrlRedirect.httpsRedirect

boolean

If set to true, the URL scheme in the redirected request is set to HTTPS. If set to false, the URL scheme of the redirected request remains the same as that of the request.

This must only be set for URL maps used in TargetHttpProxys. Setting this true for TargetHttpsProxy is not permitted.

The default is set to false.
pathMatchers[].defaultUrlRedirect.stripQuery

boolean

If set to true, any accompanying query portion of the original URL is removed before redirecting the request. If set to false, the query portion of the original URL is retained.

The default is set to false.

pathMatchers[].pathRules[]

object

The list of path rules. Use this list instead of routeRules when routing based on simple path matching is all that's required. The order by which path rules are specified does not matter. Matches are always done on the longest-path-first basis.

For example: a pathRule with a path /a/b/c/* will match before /a/b/* irrespective of the order in which those paths appear in this list.

Within a given pathMatcher, only one of pathRules or routeRules must be set.
pathMatchers[].pathRules[].service

string

The full or partial URL of the backend service resource to which traffic is directed if this rule is matched. If routeAction is also specified, advanced routing actions, such as URL rewrites, take effect before sending the request to the backend. However, if service is specified, routeAction cannot contain any weightedBackendServices. Conversely, if routeAction specifies any weightedBackendServices, service must not be specified.

Only one of urlRedirect, service or routeAction.weightedBackendService must be set.
pathMatchers[].pathRules[].routeAction

object

In response to a matching path, the load balancer performs advanced routing actions, such as URL rewrites and header transformations, before forwarding the request to the selected backend. If routeAction specifies any weightedBackendServices, service must not be set. Conversely if service is set, routeAction cannot contain any weightedBackendServices.

Only one of routeAction or urlRedirect must be set.

URL maps for classic Application Load Balancers only support the urlRewrite action within a path rule's routeAction.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[]

object

A list of weighted backend services to send traffic to when a route match occurs. The weights determine the fraction of traffic that flows to their corresponding backend service. If all traffic needs to go to a single backend service, there must be one weightedBackendService with weight set to a non-zero number.

After a backend service is identified and before forwarding the request to the backend service, advanced routing actions such as URL rewrites and header transformations are applied depending on additional settings specified in this HttpRouteAction.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].backendService

string

The full or partial URL to the default BackendService resource. Before forwarding the request to backendService, the load balancer applies any relevant headerActions specified as part of this backendServiceWeight.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].weight

integer (uint32 format)

Specifies the fraction of traffic sent to a backend service, computed as weight / (sum of all weightedBackendService weights in routeAction) .

The selection of a backend service is determined only for new traffic. Once a user's request has been directed to a backend service, subsequent requests are sent to the same backend service as determined by the backend service's session affinity policy. Don't configure session affinity if you're using weighted traffic splitting. If you do, the weighted traffic splitting configuration takes precedence.

The value must be from 0 to 1000.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction

object

Specifies changes to request and response headers that need to take effect for the selected backendService.

headerAction specified here take effect before headerAction in the enclosing HttpRouteRule, PathMatcher and UrlMap.

headerAction is not supported for load balancers that have their loadBalancingScheme set to EXTERNAL.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToRemove[]

string

A list of header names for headers that need to be removed from the request before forwarding the request to the backendService.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[]

object

Headers to add to a matching request before forwarding the request to the backendService.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToRemove[]

string

A list of header names for headers that need to be removed from the response before sending the response back to the client.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[]

object

Headers to add the response before sending the response back to the client.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].pathRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].pathRules[].routeAction.urlRewrite

object

The spec to modify the URL of the request, before forwarding the request to the matched service.

urlRewrite is the only action supported in UrlMaps for classic Application Load Balancers.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].pathRules[].routeAction.urlRewrite.pathPrefixRewrite

string

Before forwarding the request to the selected backend service, the matching portion of the request's path is replaced by pathPrefixRewrite.

The value must be from 1 to 1024 characters.
pathMatchers[].pathRules[].routeAction.urlRewrite.hostRewrite

string

Before forwarding the request to the selected service, the request's host header is replaced with contents of hostRewrite.

The value must be from 1 to 255 characters.
pathMatchers[].pathRules[].routeAction.urlRewrite.pathTemplateRewrite

string

If specified, the pattern rewrites the URL path (based on the :path header) using the HTTP template syntax.

A corresponding pathTemplateMatch must be specified. Any template variables must exist in the pathTemplateMatch field.

  • -At least one variable must be specified in the pathTemplateMatch field
  • You can omit variables from the rewritten URL
  • The * and ** operators cannot be matched unless they have a corresponding variable name - e.g. {format=*} or {var=**}.

For example, a pathTemplateMatch of /static/{format=**} could be rewritten as /static/content/{format} to prefix /content to the URL. Variables can also be re-ordered in a rewrite, so that /{country}/{format}/{suffix=**} can be rewritten as /content/{format}/{country}/{suffix}.

At least one non-empty routeRules[].matchRules[].path_template_match is required.

Only one of pathPrefixRewrite or pathTemplateRewrite may be specified.
pathMatchers[].pathRules[].routeAction.timeout

object

Specifies the timeout for the selected route. Timeout is computed from the time the request has been fully processed (known as end-of-stream) up until the response has been processed. Timeout includes all retries.

If not specified, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].pathRules[].routeAction.timeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].pathRules[].routeAction.timeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].pathRules[].routeAction.retryPolicy

object

Specifies the retry policy associated with this route.
pathMatchers[].pathRules[].routeAction.retryPolicy.retryConditions[]

string

Specifies one or more conditions when this retry policy applies. Valid values are:

  • 5xx: retry is attempted if the instance or endpoint responds with any 5xx response code, or if the instance or endpoint does not respond at all. For example, disconnects, reset, read timeout, connection failure, and refused streams.
  • gateway-error: Similar to 5xx, but only applies to response codes 502, 503 or 504.
  • connect-failure: a retry is attempted on failures connecting to the instance or endpoint. For example, connection timeouts.
  • retriable-4xx: a retry is attempted if the instance or endpoint responds with a 4xx response code. The only error that you can retry is error code 409.
  • refused-stream: a retry is attempted if the instance or endpoint resets the stream with a REFUSED_STREAM error code. This reset type indicates that it is safe to retry.
  • cancelled: a retry is attempted if the gRPC status code in the response header is set to cancelled.
  • deadline-exceeded: a retry is attempted if the gRPC status code in the response header is set to deadline-exceeded.
  • internal: a retry is attempted if the gRPC status code in the response header is set to internal.
  • resource-exhausted: a retry is attempted if the gRPC status code in the response header is set to resource-exhausted.
  • unavailable: a retry is attempted if the gRPC status code in the response header is set to unavailable.

Only the following codes are supported when the URL map is bound to target gRPC proxy that has validateForProxyless field set to true.

  • cancelled
  • deadline-exceeded
  • internal
  • resource-exhausted
  • unavailable
pathMatchers[].pathRules[].routeAction.retryPolicy.numRetries

integer (uint32 format)

Specifies the allowed number retries. This number must be > 0. If not specified, defaults to 1.
pathMatchers[].pathRules[].routeAction.retryPolicy.perTryTimeout

object

Specifies a non-zero timeout per retry attempt.

If not specified, will use the timeout set in the HttpRouteAction field. If timeout in the HttpRouteAction field is not set, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].pathRules[].routeAction.retryPolicy.perTryTimeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].pathRules[].routeAction.retryPolicy.perTryTimeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].pathRules[].routeAction.requestMirrorPolicy

object

Specifies the policy on how requests intended for the route's backends are shadowed to a separate mirrored backend service. The load balancer does not wait for responses from the shadow service. Before sending traffic to the shadow service, the host / authority header is suffixed with -shadow.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].pathRules[].routeAction.requestMirrorPolicy.backendService

string

The full or partial URL to the BackendService resource being mirrored to.

The backend service configured for a mirroring policy must reference backends that are of the same type as the original backend service matched in the URL map.

Serverless NEG backends are not currently supported as a mirrored backend service.
pathMatchers[].pathRules[].routeAction.corsPolicy

object

The specification for allowing client-side cross-origin requests. For more information about the W3C recommendation for cross-origin resource sharing (CORS), see Fetch API Living Standard.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].pathRules[].routeAction.corsPolicy.allowOrigins[]

string

Specifies the list of origins that is allowed to do CORS requests.

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.
pathMatchers[].pathRules[].routeAction.corsPolicy.allowOriginRegexes[]

string

Specifies a regular expression that matches allowed origins. For more information, see regular expression syntax .

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.

Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
pathMatchers[].pathRules[].routeAction.corsPolicy.allowMethods[]

string

Specifies the content for the Access-Control-Allow-Methods header.
pathMatchers[].pathRules[].routeAction.corsPolicy.allowHeaders[]

string

Specifies the content for the Access-Control-Allow-Headers header.
pathMatchers[].pathRules[].routeAction.corsPolicy.exposeHeaders[]

string

Specifies the content for the Access-Control-Expose-Headers header.
pathMatchers[].pathRules[].routeAction.corsPolicy.maxAge

integer

Specifies how long results of a preflight request can be cached in seconds. This field translates to the Access-Control-Max-Age header.
pathMatchers[].pathRules[].routeAction.corsPolicy.allowCredentials

boolean

In response to a preflight request, setting this to true indicates that the actual request can include user credentials. This field translates to the Access-Control-Allow-Credentials header.

Default is false.
pathMatchers[].pathRules[].routeAction.corsPolicy.disabled

boolean

If true, disables the CORS policy. The default value is false, which indicates that the CORS policy is in effect.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy

object

The specification for fault injection introduced into traffic to test the resiliency of clients to backend service failure. As part of fault injection, when clients send requests to a backend service, delays can be introduced by a load balancer on a percentage of requests before sending those requests to the backend service. Similarly requests from clients can be aborted by the load balancer for a percentage of requests. timeout and retryPolicy is ignored by clients that are configured with a faultInjectionPolicy if: 1. The traffic is generated by fault injection AND 2. The fault injection is not a delay fault injection. Fault injection is not supported with the classic Application Load Balancer . To see which load balancers support fault injection, see Load balancing: Routing and traffic management features.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.delay

object

The specification for how client requests are delayed as part of fault injection, before being sent to a backend service.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.delay.fixedDelay

object

Specifies the value of the fixed delay interval.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.delay.fixedDelay.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.delay.fixedDelay.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.delay.percentage

number

The percentage of traffic for connections, operations, or requests for which a delay is introduced as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.abort

object

The specification for how client requests are aborted as part of fault injection.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.abort.httpStatus

integer (uint32 format)

The HTTP status code used to abort the request.

The value must be from 200 to 599 inclusive.

For gRPC protocol, the gRPC status code is mapped to HTTP status code according to this mapping table. HTTP status 200 is mapped to gRPC status UNKNOWN. Injecting an OK status is currently not supported by Traffic Director.
pathMatchers[].pathRules[].routeAction.faultInjectionPolicy.abort.percentage

number

The percentage of traffic for connections, operations, or requests that is aborted as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
pathMatchers[].pathRules[].routeAction.maxStreamDuration

object

Specifies the maximum duration (timeout) for streams on the selected route. Unlike the timeout field where the timeout duration starts from the time the request has been fully processed (known as end-of-stream), the duration in this field is computed from the beginning of the stream until the response has been processed, including all retries. A stream that does not complete in this duration is closed.

If not specified, this field uses the maximum maxStreamDuration value among all backend services associated with the route.

This field is only allowed if the Url map is used with backend services with loadBalancingScheme set to INTERNAL_SELF_MANAGED.
pathMatchers[].pathRules[].routeAction.maxStreamDuration.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].pathRules[].routeAction.maxStreamDuration.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].pathRules[].urlRedirect

object

When a path pattern is matched, the request is redirected to a URL specified by urlRedirect.

If urlRedirect is specified, service or routeAction must not be set.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].pathRules[].urlRedirect.hostRedirect

string

The host that is used in the redirect response instead of the one that was supplied in the request.

The value must be from 1 to 255 characters.
pathMatchers[].pathRules[].urlRedirect.pathRedirect

string

The path that is used in the redirect response instead of the one that was supplied in the request.

pathRedirect cannot be supplied together with prefixRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
pathMatchers[].pathRules[].urlRedirect.prefixRedirect

string

The prefix that replaces the prefixMatch specified in the HttpRouteRuleMatch, retaining the remaining portion of the URL before redirecting the request.

prefixRedirect cannot be supplied together with pathRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
pathMatchers[].pathRules[].urlRedirect.redirectResponseCode

enum

The HTTP Status code to use for this RedirectAction.

Supported values are:

  • MOVED_PERMANENTLY_DEFAULT, which is the default value and corresponds to 301.
  • FOUND, which corresponds to 302.
  • SEE_OTHER which corresponds to 303.
  • TEMPORARY_REDIRECT, which corresponds to 307. In this case, the request method is retained.
  • PERMANENT_REDIRECT, which corresponds to 308. In this case, the request method is retained.
pathMatchers[].pathRules[].urlRedirect.httpsRedirect

boolean

If set to true, the URL scheme in the redirected request is set to HTTPS. If set to false, the URL scheme of the redirected request remains the same as that of the request.

This must only be set for URL maps used in TargetHttpProxys. Setting this true for TargetHttpsProxy is not permitted.

The default is set to false.
pathMatchers[].pathRules[].urlRedirect.stripQuery

boolean

If set to true, any accompanying query portion of the original URL is removed before redirecting the request. If set to false, the query portion of the original URL is retained.

The default is set to false.

pathMatchers[].pathRules[].paths[]

string

The list of path patterns to match. Each must start with / and the only place a * is allowed is at the end following a /. The string fed to the path matcher does not include any text after the first ? or #, and those chars are not allowed here.
pathMatchers[].pathRules[].customErrorResponsePolicy

object

customErrorResponsePolicy specifies how the Load Balancer returns error responses when BackendServiceor BackendBucket responds with an error.

If a policy for an error code is not configured for the PathRule, a policy for the error code configured in pathMatcher.defaultCustomErrorResponsePolicy is applied. If one is not specified in pathMatcher.defaultCustomErrorResponsePolicy, the policy configured in UrlMap.defaultCustomErrorResponsePolicy takes effect.

For example, consider a UrlMap with the following configuration:

  • UrlMap.defaultCustomErrorResponsePolicy are configured with policies for 5xx and 4xx errors
  • A PathRule for /coming_soon/ is configured for the error code 404.

If the request is for www.myotherdomain.com and a 404 is encountered, the policy under UrlMap.defaultCustomErrorResponsePolicy takes effect. If a 404 response is encountered for the request www.example.com/current_events/, the pathMatcher's policy takes effect. If however, the request for www.example.com/coming_soon/ encounters a 404, the policy in PathRule.customErrorResponsePolicy takes effect. If any of the requests in this example encounter a 500 error code, the policy at UrlMap.defaultCustomErrorResponsePolicy takes effect.

customErrorResponsePolicy is supported only for global external Application Load Balancers.
pathMatchers[].pathRules[].customErrorResponsePolicy.errorResponseRules[]

object

Specifies rules for returning error responses.

In a given policy, if you specify rules for both a range of error codes as well as rules for specific error codes then rules with specific error codes have a higher priority. For example, assume that you configure a rule for 401 (Un-authorized) code, and another for all 4 series error codes (4XX). If the backend service returns a 401, then the rule for 401 will be applied. However if the backend service returns a 403, the rule for 4xx takes effect.
pathMatchers[].pathRules[].customErrorResponsePolicy.errorResponseRules[].matchResponseCodes[]

string

Valid values include:

  • A number between 400 and 599: For example 401 or 503, in which case the load balancer applies the policy if the error code exactly matches this value.
  • 5xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 500 to 599.
  • 4xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 400 to 499.

Values must be unique within matchResponseCodes and across all errorResponseRules of CustomErrorResponsePolicy.
pathMatchers[].pathRules[].customErrorResponsePolicy.errorResponseRules[].path

string

The full path to a file within backendBucket . For example: /errors/defaultError.html

path must start with a leading slash. path cannot have trailing slashes.

If the file is not available in backendBucket or the load balancer cannot reach the BackendBucket, a simple Not Found Error is returned to the client.

The value must be from 1 to 1024 characters
pathMatchers[].pathRules[].customErrorResponsePolicy.errorResponseRules[].overrideResponseCode

integer

The HTTP status code returned with the response containing the custom error content. If overrideResponseCode is not supplied, the same response code returned by the original backend bucket or backend service is returned to the client.
pathMatchers[].pathRules[].customErrorResponsePolicy.errorService

string

The full or partial URL to the BackendBucket resource that contains the custom error content. Examples are:

If errorService is not specified at lower levels like pathMatcher, pathRule and routeRule, an errorService specified at a higher level in the UrlMap will be used. If UrlMap.defaultCustomErrorResponsePolicy contains one or more errorResponseRules[], it must specify errorService.

If load balancer cannot reach the backendBucket, a simple Not Found Error will be returned, with the original response code (or overrideResponseCode if configured).

errorService is not supported for internal or regional HTTP/HTTPS load balancers.
pathMatchers[].routeRules[]

object

The list of HTTP route rules. Use this list instead of pathRules when advanced route matching and routing actions are desired. routeRules are evaluated in order of priority, from the lowest to highest number.

Within a given pathMatcher, you can set only one of pathRules or routeRules.
pathMatchers[].routeRules[].priority

integer

For routeRules within a given pathMatcher, priority determines the order in which a load balancer interprets routeRules. RouteRules are evaluated in order of priority, from the lowest to highest number. The priority of a rule decreases as its number increases (1, 2, 3, N+1). The first rule that matches the request is applied.

You cannot configure two or more routeRules with the same priority. Priority for each rule must be set to a number from 0 to 2147483647 inclusive.

Priority numbers can have gaps, which enable you to add or remove rules in the future without affecting the rest of the rules. For example, 1, 2, 3, 4, 5, 9, 12, 16 is a valid series of priority numbers to which you could add rules numbered from 6 to 8, 10 to 11, and 13 to 15 in the future without any impact on existing rules.
pathMatchers[].routeRules[].description

string

The short description conveying the intent of this routeRule.

The description can have a maximum length of 1024 characters.
pathMatchers[].routeRules[].matchRules[]

object

The list of criteria for matching attributes of a request to this routeRule. This list has OR semantics: the request matches this routeRule when any of the matchRules are satisfied. However predicates within a given matchRule have AND semantics. All predicates within a matchRule must match for the request to match the rule.
pathMatchers[].routeRules[].matchRules[].prefixMatch

string

For satisfying the matchRule condition, the request's path must begin with the specified prefixMatch. prefixMatch must begin with a /.

The value must be from 1 to 1024 characters.

Only one of prefixMatch, fullPathMatch or regexMatch must be specified.
pathMatchers[].routeRules[].matchRules[].fullPathMatch

string

For satisfying the matchRule condition, the path of the request must exactly match the value specified in fullPathMatch after removing any query parameters and anchor that may be part of the original URL.

fullPathMatch must be from 1 to 1024 characters.

Only one of prefixMatch, fullPathMatch or regexMatch must be specified.
pathMatchers[].routeRules[].matchRules[].regexMatch

string

For satisfying the matchRule condition, the path of the request must satisfy the regular expression specified in regexMatch after removing any query parameters and anchor supplied with the original URL. For more information about regular expression syntax, see Syntax.

Only one of prefixMatch, fullPathMatch or regexMatch must be specified.

Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
pathMatchers[].routeRules[].matchRules[].ignoreCase

boolean

Specifies that prefixMatch and fullPathMatch matches are case sensitive.

The default value is false.

ignoreCase must not be used with regexMatch.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].routeRules[].matchRules[].headerMatches[]

object

Specifies a list of header match criteria, all of which must match corresponding headers in the request.
pathMatchers[].routeRules[].matchRules[].headerMatches[].headerName

string

The name of the HTTP header to match.

For matching against the HTTP request's authority, use a headerMatch with the header name ":authority".

For matching a request's method, use the headerName ":method".

When the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true, only non-binary user-specified custom metadata and the content-type header are supported. The following transport-level headers cannot be used in header matching rules: :authority, :method, :path, :scheme, user-agent, accept-encoding, content-encoding, grpc-accept-encoding, grpc-encoding, grpc-previous-rpc-attempts, grpc-tags-bin, grpc-timeout and grpc-trace-bin.
pathMatchers[].routeRules[].matchRules[].headerMatches[].exactMatch

string

The value should exactly match contents of exactMatch.

Only one of exactMatch, prefixMatch, suffixMatch, regexMatch, presentMatch or rangeMatch must be set.
pathMatchers[].routeRules[].matchRules[].headerMatches[].regexMatch

string

The value of the header must match the regular expression specified in regexMatch. For more information about regular expression syntax, see Syntax.

For matching against a port specified in the HTTP request, use a headerMatch with headerName set to PORT and a regular expression that satisfies the RFC2616 Host header's port specifier.

Only one of exactMatch, prefixMatch, suffixMatch, regexMatch, presentMatch or rangeMatch must be set.

Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
pathMatchers[].routeRules[].matchRules[].headerMatches[].rangeMatch

object

The header value must be an integer and its value must be in the range specified in rangeMatch. If the header does not contain an integer, number or is empty, the match fails.

For example for a range [-5, 0]

  • -3 will match.
  • 0 will not match.
  • 0.25 will not match.
  • -3someString will not match.

Only one of exactMatch, prefixMatch, suffixMatch, regexMatch, presentMatch or rangeMatch must be set.

rangeMatch is not supported for load balancers that have loadBalancingScheme set to EXTERNAL.
pathMatchers[].routeRules[].matchRules[].headerMatches[].rangeMatch.rangeStart

string (int64 format)

The start of the range (inclusive) in signed long integer format.
pathMatchers[].routeRules[].matchRules[].headerMatches[].rangeMatch.rangeEnd

string (int64 format)

The end of the range (exclusive) in signed long integer format.
pathMatchers[].routeRules[].matchRules[].headerMatches[].presentMatch

boolean

A header with the contents of headerName must exist. The match takes place whether or not the request's header has a value.

Only one of exactMatch, prefixMatch, suffixMatch, regexMatch, presentMatch or rangeMatch must be set.
pathMatchers[].routeRules[].matchRules[].headerMatches[].prefixMatch

string

The value of the header must start with the contents of prefixMatch.

Only one of exactMatch, prefixMatch, suffixMatch, regexMatch, presentMatch or rangeMatch must be set.
pathMatchers[].routeRules[].matchRules[].headerMatches[].suffixMatch

string

The value of the header must end with the contents of suffixMatch.

Only one of exactMatch, prefixMatch, suffixMatch, regexMatch, presentMatch or rangeMatch must be set.
pathMatchers[].routeRules[].matchRules[].headerMatches[].invertMatch

boolean

If set to false, the headerMatch is considered a match if the preceding match criteria are met. If set to true, the headerMatch is considered a match if the preceding match criteria are NOT met.

The default setting is false.
pathMatchers[].routeRules[].matchRules[].queryParameterMatches[]

object

Specifies a list of query parameter match criteria, all of which must match corresponding query parameters in the request.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].routeRules[].matchRules[].queryParameterMatches[].name

string

The name of the query parameter to match. The query parameter must exist in the request, in the absence of which the request match fails.
pathMatchers[].routeRules[].matchRules[].queryParameterMatches[].presentMatch

boolean

Specifies that the queryParameterMatch matches if the request contains the query parameter, irrespective of whether the parameter has a value or not.

Only one of presentMatch, exactMatch, or regexMatch must be set.
pathMatchers[].routeRules[].matchRules[].queryParameterMatches[].exactMatch

string

The queryParameterMatch matches if the value of the parameter exactly matches the contents of exactMatch.

Only one of presentMatch, exactMatch, or regexMatch must be set.
pathMatchers[].routeRules[].matchRules[].queryParameterMatches[].regexMatch

string

The queryParameterMatch matches if the value of the parameter matches the regular expression specified by regexMatch. For more information about regular expression syntax, see Syntax.

Only one of presentMatch, exactMatch, or regexMatch must be set.

Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
pathMatchers[].routeRules[].matchRules[].metadataFilters[]

object

Opaque filter criteria used by the load balancer to restrict routing configuration to a limited set of xDS compliant clients. In their xDS requests to the load balancer, xDS clients present node metadata. When there is a match, the relevant routing configuration is made available to those proxies.

For each metadataFilter in this list, if its filterMatchCriteria is set to MATCH_ANY, at least one of the filterLabels must match the corresponding label provided in the metadata. If its filterMatchCriteria is set to MATCH_ALL, then all of its filterLabels must match with corresponding labels provided in the metadata. If multiple metadata filters are specified, all of them need to be satisfied in order to be considered a match.

metadataFilters specified here is applied after those specified in ForwardingRule that refers to the UrlMap this HttpRouteRuleMatch belongs to.

metadataFilters only applies to load balancers that have loadBalancingScheme set to INTERNAL_SELF_MANAGED.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].routeRules[].matchRules[].metadataFilters[].filterMatchCriteria

enum

Specifies how individual filter label matches within the list of filterLabels and contributes toward the overall metadataFilter match.

Supported values are:

  • MATCH_ANY: at least one of the filterLabels must have a matching label in the provided metadata.
  • MATCH_ALL: all filterLabels must have matching labels in the provided metadata.
pathMatchers[].routeRules[].matchRules[].metadataFilters[].filterLabels[]

object

The list of label value pairs that must match labels in the provided metadata based on filterMatchCriteria

This list must not be empty and can have at the most 64 entries.
pathMatchers[].routeRules[].matchRules[].metadataFilters[].filterLabels[].name

string

Name of metadata label.

The name can have a maximum length of 1024 characters and must be at least 1 character long.
pathMatchers[].routeRules[].matchRules[].metadataFilters[].filterLabels[].value

string

The value of the label must match the specified value.

value can have a maximum length of 1024 characters.
pathMatchers[].routeRules[].matchRules[].pathTemplateMatch

string

If specified, the route is a pattern match expression that must match the :path header once the query string is removed.

A pattern match allows you to match

  • The value must be between 1 and 1024 characters
  • The pattern must start with a leading slash ("/")
  • There may be no more than 5 operators in pattern

Precisely one of prefixMatch, fullPathMatch, regexMatch or pathTemplateMatch must be set.
pathMatchers[].routeRules[].service

string

The full or partial URL of the backend service resource to which traffic is directed if this rule is matched. If routeAction is also specified, advanced routing actions, such as URL rewrites, take effect before sending the request to the backend. However, if service is specified, routeAction cannot contain any weightedBackendServices. Conversely, if routeAction specifies any weightedBackendServices, service must not be specified.

Only one of urlRedirect, service or routeAction.weightedBackendService must be set.
pathMatchers[].routeRules[].routeAction

object

In response to a matching matchRule, the load balancer performs advanced routing actions, such as URL rewrites and header transformations, before forwarding the request to the selected backend. If routeAction specifies any weightedBackendServices, service must not be set. Conversely if service is set, routeAction cannot contain any weightedBackendServices.

Only one of urlRedirect, service or routeAction.weightedBackendService must be set.

URL maps for classic Application Load Balancers only support the urlRewrite action within a route rule's routeAction.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[]

object

A list of weighted backend services to send traffic to when a route match occurs. The weights determine the fraction of traffic that flows to their corresponding backend service. If all traffic needs to go to a single backend service, there must be one weightedBackendService with weight set to a non-zero number.

After a backend service is identified and before forwarding the request to the backend service, advanced routing actions such as URL rewrites and header transformations are applied depending on additional settings specified in this HttpRouteAction.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].backendService

string

The full or partial URL to the default BackendService resource. Before forwarding the request to backendService, the load balancer applies any relevant headerActions specified as part of this backendServiceWeight.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].weight

integer (uint32 format)

Specifies the fraction of traffic sent to a backend service, computed as weight / (sum of all weightedBackendService weights in routeAction) .

The selection of a backend service is determined only for new traffic. Once a user's request has been directed to a backend service, subsequent requests are sent to the same backend service as determined by the backend service's session affinity policy. Don't configure session affinity if you're using weighted traffic splitting. If you do, the weighted traffic splitting configuration takes precedence.

The value must be from 0 to 1000.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction

object

Specifies changes to request and response headers that need to take effect for the selected backendService.

headerAction specified here take effect before headerAction in the enclosing HttpRouteRule, PathMatcher and UrlMap.

headerAction is not supported for load balancers that have their loadBalancingScheme set to EXTERNAL.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToRemove[]

string

A list of header names for headers that need to be removed from the request before forwarding the request to the backendService.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[]

object

Headers to add to a matching request before forwarding the request to the backendService.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToRemove[]

string

A list of header names for headers that need to be removed from the response before sending the response back to the client.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[]

object

Headers to add the response before sending the response back to the client.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].routeRules[].routeAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].routeRules[].routeAction.urlRewrite

object

The spec to modify the URL of the request, before forwarding the request to the matched service.

urlRewrite is the only action supported in UrlMaps for classic Application Load Balancers.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].routeRules[].routeAction.urlRewrite.pathPrefixRewrite

string

Before forwarding the request to the selected backend service, the matching portion of the request's path is replaced by pathPrefixRewrite.

The value must be from 1 to 1024 characters.
pathMatchers[].routeRules[].routeAction.urlRewrite.hostRewrite

string

Before forwarding the request to the selected service, the request's host header is replaced with contents of hostRewrite.

The value must be from 1 to 255 characters.
pathMatchers[].routeRules[].routeAction.urlRewrite.pathTemplateRewrite

string

If specified, the pattern rewrites the URL path (based on the :path header) using the HTTP template syntax.

A corresponding pathTemplateMatch must be specified. Any template variables must exist in the pathTemplateMatch field.

  • -At least one variable must be specified in the pathTemplateMatch field
  • You can omit variables from the rewritten URL
  • The * and ** operators cannot be matched unless they have a corresponding variable name - e.g. {format=*} or {var=**}.

For example, a pathTemplateMatch of /static/{format=**} could be rewritten as /static/content/{format} to prefix /content to the URL. Variables can also be re-ordered in a rewrite, so that /{country}/{format}/{suffix=**} can be rewritten as /content/{format}/{country}/{suffix}.

At least one non-empty routeRules[].matchRules[].path_template_match is required.

Only one of pathPrefixRewrite or pathTemplateRewrite may be specified.
pathMatchers[].routeRules[].routeAction.timeout

object

Specifies the timeout for the selected route. Timeout is computed from the time the request has been fully processed (known as end-of-stream) up until the response has been processed. Timeout includes all retries.

If not specified, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].routeRules[].routeAction.timeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].routeRules[].routeAction.timeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].routeRules[].routeAction.retryPolicy

object

Specifies the retry policy associated with this route.
pathMatchers[].routeRules[].routeAction.retryPolicy.retryConditions[]

string

Specifies one or more conditions when this retry policy applies. Valid values are:

  • 5xx: retry is attempted if the instance or endpoint responds with any 5xx response code, or if the instance or endpoint does not respond at all. For example, disconnects, reset, read timeout, connection failure, and refused streams.
  • gateway-error: Similar to 5xx, but only applies to response codes 502, 503 or 504.
  • connect-failure: a retry is attempted on failures connecting to the instance or endpoint. For example, connection timeouts.
  • retriable-4xx: a retry is attempted if the instance or endpoint responds with a 4xx response code. The only error that you can retry is error code 409.
  • refused-stream: a retry is attempted if the instance or endpoint resets the stream with a REFUSED_STREAM error code. This reset type indicates that it is safe to retry.
  • cancelled: a retry is attempted if the gRPC status code in the response header is set to cancelled.
  • deadline-exceeded: a retry is attempted if the gRPC status code in the response header is set to deadline-exceeded.
  • internal: a retry is attempted if the gRPC status code in the response header is set to internal.
  • resource-exhausted: a retry is attempted if the gRPC status code in the response header is set to resource-exhausted.
  • unavailable: a retry is attempted if the gRPC status code in the response header is set to unavailable.

Only the following codes are supported when the URL map is bound to target gRPC proxy that has validateForProxyless field set to true.

  • cancelled
  • deadline-exceeded
  • internal
  • resource-exhausted
  • unavailable
pathMatchers[].routeRules[].routeAction.retryPolicy.numRetries

integer (uint32 format)

Specifies the allowed number retries. This number must be > 0. If not specified, defaults to 1.
pathMatchers[].routeRules[].routeAction.retryPolicy.perTryTimeout

object

Specifies a non-zero timeout per retry attempt.

If not specified, will use the timeout set in the HttpRouteAction field. If timeout in the HttpRouteAction field is not set, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].routeRules[].routeAction.retryPolicy.perTryTimeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].routeRules[].routeAction.retryPolicy.perTryTimeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].routeRules[].routeAction.requestMirrorPolicy

object

Specifies the policy on how requests intended for the route's backends are shadowed to a separate mirrored backend service. The load balancer does not wait for responses from the shadow service. Before sending traffic to the shadow service, the host / authority header is suffixed with -shadow.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
pathMatchers[].routeRules[].routeAction.requestMirrorPolicy.backendService

string

The full or partial URL to the BackendService resource being mirrored to.

The backend service configured for a mirroring policy must reference backends that are of the same type as the original backend service matched in the URL map.

Serverless NEG backends are not currently supported as a mirrored backend service.
pathMatchers[].routeRules[].routeAction.corsPolicy

object

The specification for allowing client-side cross-origin requests. For more information about the W3C recommendation for cross-origin resource sharing (CORS), see Fetch API Living Standard.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].routeRules[].routeAction.corsPolicy.allowOrigins[]

string

Specifies the list of origins that is allowed to do CORS requests.

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.
pathMatchers[].routeRules[].routeAction.corsPolicy.allowOriginRegexes[]

string

Specifies a regular expression that matches allowed origins. For more information, see regular expression syntax .

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.

Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
pathMatchers[].routeRules[].routeAction.corsPolicy.allowMethods[]

string

Specifies the content for the Access-Control-Allow-Methods header.
pathMatchers[].routeRules[].routeAction.corsPolicy.allowHeaders[]

string

Specifies the content for the Access-Control-Allow-Headers header.
pathMatchers[].routeRules[].routeAction.corsPolicy.exposeHeaders[]

string

Specifies the content for the Access-Control-Expose-Headers header.
pathMatchers[].routeRules[].routeAction.corsPolicy.maxAge

integer

Specifies how long results of a preflight request can be cached in seconds. This field translates to the Access-Control-Max-Age header.
pathMatchers[].routeRules[].routeAction.corsPolicy.allowCredentials

boolean

In response to a preflight request, setting this to true indicates that the actual request can include user credentials. This field translates to the Access-Control-Allow-Credentials header.

Default is false.
pathMatchers[].routeRules[].routeAction.corsPolicy.disabled

boolean

If true, disables the CORS policy. The default value is false, which indicates that the CORS policy is in effect.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy

object

The specification for fault injection introduced into traffic to test the resiliency of clients to backend service failure. As part of fault injection, when clients send requests to a backend service, delays can be introduced by a load balancer on a percentage of requests before sending those requests to the backend service. Similarly requests from clients can be aborted by the load balancer for a percentage of requests. timeout and retryPolicy is ignored by clients that are configured with a faultInjectionPolicy if: 1. The traffic is generated by fault injection AND 2. The fault injection is not a delay fault injection. Fault injection is not supported with the classic Application Load Balancer . To see which load balancers support fault injection, see Load balancing: Routing and traffic management features.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.delay

object

The specification for how client requests are delayed as part of fault injection, before being sent to a backend service.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.delay.fixedDelay

object

Specifies the value of the fixed delay interval.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.delay.fixedDelay.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.delay.fixedDelay.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.delay.percentage

number

The percentage of traffic for connections, operations, or requests for which a delay is introduced as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.abort

object

The specification for how client requests are aborted as part of fault injection.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.abort.httpStatus

integer (uint32 format)

The HTTP status code used to abort the request.

The value must be from 200 to 599 inclusive.

For gRPC protocol, the gRPC status code is mapped to HTTP status code according to this mapping table. HTTP status 200 is mapped to gRPC status UNKNOWN. Injecting an OK status is currently not supported by Traffic Director.
pathMatchers[].routeRules[].routeAction.faultInjectionPolicy.abort.percentage

number

The percentage of traffic for connections, operations, or requests that is aborted as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
pathMatchers[].routeRules[].routeAction.maxStreamDuration

object

Specifies the maximum duration (timeout) for streams on the selected route. Unlike the timeout field where the timeout duration starts from the time the request has been fully processed (known as end-of-stream), the duration in this field is computed from the beginning of the stream until the response has been processed, including all retries. A stream that does not complete in this duration is closed.

If not specified, this field uses the maximum maxStreamDuration value among all backend services associated with the route.

This field is only allowed if the Url map is used with backend services with loadBalancingScheme set to INTERNAL_SELF_MANAGED.
pathMatchers[].routeRules[].routeAction.maxStreamDuration.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
pathMatchers[].routeRules[].routeAction.maxStreamDuration.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
pathMatchers[].routeRules[].urlRedirect

object

When this rule is matched, the request is redirected to a URL specified by urlRedirect.

If urlRedirect is specified, service or routeAction must not be set.

Not supported when the URL map is bound to a target gRPC proxy.
pathMatchers[].routeRules[].urlRedirect.hostRedirect

string

The host that is used in the redirect response instead of the one that was supplied in the request.

The value must be from 1 to 255 characters.
pathMatchers[].routeRules[].urlRedirect.pathRedirect

string

The path that is used in the redirect response instead of the one that was supplied in the request.

pathRedirect cannot be supplied together with prefixRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
pathMatchers[].routeRules[].urlRedirect.prefixRedirect

string

The prefix that replaces the prefixMatch specified in the HttpRouteRuleMatch, retaining the remaining portion of the URL before redirecting the request.

prefixRedirect cannot be supplied together with pathRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
pathMatchers[].routeRules[].urlRedirect.redirectResponseCode

enum

The HTTP Status code to use for this RedirectAction.

Supported values are:

  • MOVED_PERMANENTLY_DEFAULT, which is the default value and corresponds to 301.
  • FOUND, which corresponds to 302.
  • SEE_OTHER which corresponds to 303.
  • TEMPORARY_REDIRECT, which corresponds to 307. In this case, the request method is retained.
  • PERMANENT_REDIRECT, which corresponds to 308. In this case, the request method is retained.
pathMatchers[].routeRules[].urlRedirect.httpsRedirect

boolean

If set to true, the URL scheme in the redirected request is set to HTTPS. If set to false, the URL scheme of the redirected request remains the same as that of the request.

This must only be set for URL maps used in TargetHttpProxys. Setting this true for TargetHttpsProxy is not permitted.

The default is set to false.
pathMatchers[].routeRules[].urlRedirect.stripQuery

boolean

If set to true, any accompanying query portion of the original URL is removed before redirecting the request. If set to false, the query portion of the original URL is retained.

The default is set to false.

pathMatchers[].routeRules[].headerAction

object

Specifies changes to request and response headers that need to take effect for the selected backendService.

The headerAction value specified here is applied before the matching pathMatchers[].headerAction and after pathMatchers[].routeRules[].routeAction.weightedBackendService.backendServiceWeightAction[].headerAction

HeaderAction is not supported for load balancers that have their loadBalancingScheme set to EXTERNAL.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].routeRules[].headerAction.requestHeadersToRemove[]

string

A list of header names for headers that need to be removed from the request before forwarding the request to the backendService.
pathMatchers[].routeRules[].headerAction.requestHeadersToAdd[]

object

Headers to add to a matching request before forwarding the request to the backendService.
pathMatchers[].routeRules[].headerAction.requestHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].routeRules[].headerAction.requestHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].routeRules[].headerAction.requestHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].routeRules[].headerAction.responseHeadersToRemove[]

string

A list of header names for headers that need to be removed from the response before sending the response back to the client.
pathMatchers[].routeRules[].headerAction.responseHeadersToAdd[]

object

Headers to add the response before sending the response back to the client.
pathMatchers[].routeRules[].headerAction.responseHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].routeRules[].headerAction.responseHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].routeRules[].headerAction.responseHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].routeRules[].customErrorResponsePolicy

object

customErrorResponsePolicy specifies how the Load Balancer returns error responses when BackendServiceor BackendBucket responds with an error.

If a policy for an error code is not configured for the RouteRule, a policy for the error code configured in pathMatcher.defaultCustomErrorResponsePolicy is applied. If one is not specified in pathMatcher.defaultCustomErrorResponsePolicy, the policy configured in UrlMap.defaultCustomErrorResponsePolicy takes effect.

For example, consider a UrlMap with the following configuration:

  • UrlMap.defaultCustomErrorResponsePolicy are configured with policies for 5xx and 4xx errors
  • A RouteRule for /coming_soon/ is configured for the error code 404.

If the request is for www.myotherdomain.com and a 404 is encountered, the policy under UrlMap.defaultCustomErrorResponsePolicy takes effect. If a 404 response is encountered for the request www.example.com/current_events/, the pathMatcher's policy takes effect. If however, the request for www.example.com/coming_soon/ encounters a 404, the policy in RouteRule.customErrorResponsePolicy takes effect. If any of the requests in this example encounter a 500 error code, the policy at UrlMap.defaultCustomErrorResponsePolicy takes effect.

When used in conjunction with routeRules.routeAction.retryPolicy, retries take precedence. Only once all retries are exhausted, the customErrorResponsePolicy is applied. While attempting a retry, if load balancer is successful in reaching the service, the customErrorResponsePolicy is ignored and the response from the service is returned to the client.

customErrorResponsePolicy is supported only for global external Application Load Balancers.
pathMatchers[].routeRules[].customErrorResponsePolicy.errorResponseRules[]

object

Specifies rules for returning error responses.

In a given policy, if you specify rules for both a range of error codes as well as rules for specific error codes then rules with specific error codes have a higher priority. For example, assume that you configure a rule for 401 (Un-authorized) code, and another for all 4 series error codes (4XX). If the backend service returns a 401, then the rule for 401 will be applied. However if the backend service returns a 403, the rule for 4xx takes effect.
pathMatchers[].routeRules[].customErrorResponsePolicy.errorResponseRules[].matchResponseCodes[]

string

Valid values include:

  • A number between 400 and 599: For example 401 or 503, in which case the load balancer applies the policy if the error code exactly matches this value.
  • 5xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 500 to 599.
  • 4xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 400 to 499.

Values must be unique within matchResponseCodes and across all errorResponseRules of CustomErrorResponsePolicy.
pathMatchers[].routeRules[].customErrorResponsePolicy.errorResponseRules[].path

string

The full path to a file within backendBucket . For example: /errors/defaultError.html

path must start with a leading slash. path cannot have trailing slashes.

If the file is not available in backendBucket or the load balancer cannot reach the BackendBucket, a simple Not Found Error is returned to the client.

The value must be from 1 to 1024 characters
pathMatchers[].routeRules[].customErrorResponsePolicy.errorResponseRules[].overrideResponseCode

integer

The HTTP status code returned with the response containing the custom error content. If overrideResponseCode is not supplied, the same response code returned by the original backend bucket or backend service is returned to the client.
pathMatchers[].routeRules[].customErrorResponsePolicy.errorService

string

The full or partial URL to the BackendBucket resource that contains the custom error content. Examples are:

If errorService is not specified at lower levels like pathMatcher, pathRule and routeRule, an errorService specified at a higher level in the UrlMap will be used. If UrlMap.defaultCustomErrorResponsePolicy contains one or more errorResponseRules[], it must specify errorService.

If load balancer cannot reach the backendBucket, a simple Not Found Error will be returned, with the original response code (or overrideResponseCode if configured).

errorService is not supported for internal or regional HTTP/HTTPS load balancers.
pathMatchers[].headerAction

object

Specifies changes to request and response headers that need to take effect for the selected backend service.

HeaderAction specified here are applied after the matching HttpRouteRule HeaderAction and before the HeaderAction in the UrlMap

HeaderAction is not supported for load balancers that have their loadBalancingScheme set to EXTERNAL.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
pathMatchers[].headerAction.requestHeadersToRemove[]

string

A list of header names for headers that need to be removed from the request before forwarding the request to the backendService.
pathMatchers[].headerAction.requestHeadersToAdd[]

object

Headers to add to a matching request before forwarding the request to the backendService.
pathMatchers[].headerAction.requestHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].headerAction.requestHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].headerAction.requestHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].headerAction.responseHeadersToRemove[]

string

A list of header names for headers that need to be removed from the response before sending the response back to the client.
pathMatchers[].headerAction.responseHeadersToAdd[]

object

Headers to add the response before sending the response back to the client.
pathMatchers[].headerAction.responseHeadersToAdd[].headerName

string

The name of the header.
pathMatchers[].headerAction.responseHeadersToAdd[].headerValue

string

The value of the header to add.
pathMatchers[].headerAction.responseHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
pathMatchers[].defaultCustomErrorResponsePolicy

object

defaultCustomErrorResponsePolicy specifies how the Load Balancer returns error responses when BackendServiceor BackendBucket responds with an error.

This policy takes effect at the PathMatcher level and applies only when no policy has been defined for the error code at lower levels like RouteRule and PathRule within this PathMatcher. If an error code does not have a policy defined in defaultCustomErrorResponsePolicy, then a policy defined for the error code in UrlMap.defaultCustomErrorResponsePolicy takes effect.

For example, consider a UrlMap with the following configuration:

  • UrlMap.defaultCustomErrorResponsePolicy is configured with policies for 5xx and 4xx errors
  • A RouteRule for /coming_soon/ is configured for the error code 404.

If the request is for www.myotherdomain.com and a 404 is encountered, the policy under UrlMap.defaultCustomErrorResponsePolicy takes effect. If a 404 response is encountered for the request www.example.com/current_events/, the pathMatcher's policy takes effect. If however, the request for www.example.com/coming_soon/ encounters a 404, the policy in RouteRule.customErrorResponsePolicy takes effect. If any of the requests in this example encounter a 500 error code, the policy at UrlMap.defaultCustomErrorResponsePolicy takes effect.

When used in conjunction with pathMatcher.defaultRouteAction.retryPolicy, retries take precedence. Only once all retries are exhausted, the defaultCustomErrorResponsePolicy is applied. While attempting a retry, if load balancer is successful in reaching the service, the defaultCustomErrorResponsePolicy is ignored and the response from the service is returned to the client.

defaultCustomErrorResponsePolicy is supported only for global external Application Load Balancers.
pathMatchers[].defaultCustomErrorResponsePolicy.errorResponseRules[]

object

Specifies rules for returning error responses.

In a given policy, if you specify rules for both a range of error codes as well as rules for specific error codes then rules with specific error codes have a higher priority. For example, assume that you configure a rule for 401 (Un-authorized) code, and another for all 4 series error codes (4XX). If the backend service returns a 401, then the rule for 401 will be applied. However if the backend service returns a 403, the rule for 4xx takes effect.
pathMatchers[].defaultCustomErrorResponsePolicy.errorResponseRules[].matchResponseCodes[]

string

Valid values include:

  • A number between 400 and 599: For example 401 or 503, in which case the load balancer applies the policy if the error code exactly matches this value.
  • 5xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 500 to 599.
  • 4xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 400 to 499.

Values must be unique within matchResponseCodes and across all errorResponseRules of CustomErrorResponsePolicy.
pathMatchers[].defaultCustomErrorResponsePolicy.errorResponseRules[].path

string

The full path to a file within backendBucket . For example: /errors/defaultError.html

path must start with a leading slash. path cannot have trailing slashes.

If the file is not available in backendBucket or the load balancer cannot reach the BackendBucket, a simple Not Found Error is returned to the client.

The value must be from 1 to 1024 characters
pathMatchers[].defaultCustomErrorResponsePolicy.errorResponseRules[].overrideResponseCode

integer

The HTTP status code returned with the response containing the custom error content. If overrideResponseCode is not supplied, the same response code returned by the original backend bucket or backend service is returned to the client.
pathMatchers[].defaultCustomErrorResponsePolicy.errorService

string

The full or partial URL to the BackendBucket resource that contains the custom error content. Examples are:

If errorService is not specified at lower levels like pathMatcher, pathRule and routeRule, an errorService specified at a higher level in the UrlMap will be used. If UrlMap.defaultCustomErrorResponsePolicy contains one or more errorResponseRules[], it must specify errorService.

If load balancer cannot reach the backendBucket, a simple Not Found Error will be returned, with the original response code (or overrideResponseCode if configured).

errorService is not supported for internal or regional HTTP/HTTPS load balancers.
tests[]

object

The list of expected URL mapping tests. Request to update the UrlMap succeeds only if all test cases pass. You can specify a maximum of 100 tests per UrlMap.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
tests[].description

string

Description of this test case.
tests[].host

string

Host portion of the URL. If headers contains a host header, then host must also match the header value.
tests[].path

string

Path portion of the URL.
tests[].headers[]

object

HTTP headers for this request. If headers contains a host header, then host must also match the header value.
tests[].headers[].name

string

Header name.
tests[].headers[].value

string

Header value.
tests[].service

string

Expected BackendService or BackendBucket resource the given URL should be mapped to.

The service field cannot be set if expectedRedirectResponseCode is set.
tests[].expectedOutputUrl

string

The expected output URL evaluated by the load balancer containing the scheme, host, path and query parameters.

For rules that forward requests to backends, the test passes only when expectedOutputUrl matches the request forwarded by the load balancer to backends. For rules with urlRewrite, the test verifies that the forwarded request matches hostRewrite and pathPrefixRewrite in the urlRewrite action. When service is specified, expectedOutputUrl`s scheme is ignored.

For rules with urlRedirect, the test passes only if expectedOutputUrl matches the URL in the load balancer's redirect response. If urlRedirect specifies httpsRedirect, the test passes only if the scheme in expectedOutputUrl is also set to HTTPS. If urlRedirect specifies stripQuery, the test passes only if expectedOutputUrl does not contain any query parameters.

expectedOutputUrl is optional when service is specified.
tests[].expectedRedirectResponseCode

integer

For rules with urlRedirect, the test passes only if expectedRedirectResponseCode matches the HTTP status code in load balancer's redirect response.

expectedRedirectResponseCode cannot be set when service is set.
defaultService

string

The full or partial URL of the defaultService resource to which traffic is directed if none of the hostRules match. If defaultRouteAction is also specified, advanced routing actions, such as URL rewrites, take effect before sending the request to the backend. However, if defaultService is specified, defaultRouteAction cannot contain any defaultRouteAction.weightedBackendServices. Conversely, if defaultRouteAction specifies any defaultRouteAction.weightedBackendServices, defaultService must not be specified.

If defaultService is specified, then set either defaultUrlRedirect , or defaultRouteAction.weightedBackendService Don't set both.

defaultService has no effect when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
defaultRouteAction

object

defaultRouteAction takes effect when none of the hostRules match. The load balancer performs advanced routing actions, such as URL rewrites and header transformations, before forwarding the request to the selected backend. If defaultRouteAction specifies any weightedBackendServices, defaultService must not be set. Conversely if defaultService is set, defaultRouteAction cannot contain any weightedBackendServices.

Only one of defaultRouteAction or defaultUrlRedirect must be set.

URL maps for classic Application Load Balancers only support the urlRewrite action within defaultRouteAction.

defaultRouteAction has no effect when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
defaultRouteAction.weightedBackendServices[]

object

A list of weighted backend services to send traffic to when a route match occurs. The weights determine the fraction of traffic that flows to their corresponding backend service. If all traffic needs to go to a single backend service, there must be one weightedBackendService with weight set to a non-zero number.

After a backend service is identified and before forwarding the request to the backend service, advanced routing actions such as URL rewrites and header transformations are applied depending on additional settings specified in this HttpRouteAction.
defaultRouteAction.weightedBackendServices[].backendService

string

The full or partial URL to the default BackendService resource. Before forwarding the request to backendService, the load balancer applies any relevant headerActions specified as part of this backendServiceWeight.
defaultRouteAction.weightedBackendServices[].weight

integer (uint32 format)

Specifies the fraction of traffic sent to a backend service, computed as weight / (sum of all weightedBackendService weights in routeAction) .

The selection of a backend service is determined only for new traffic. Once a user's request has been directed to a backend service, subsequent requests are sent to the same backend service as determined by the backend service's session affinity policy. Don't configure session affinity if you're using weighted traffic splitting. If you do, the weighted traffic splitting configuration takes precedence.

The value must be from 0 to 1000.
defaultRouteAction.weightedBackendServices[].headerAction

object

Specifies changes to request and response headers that need to take effect for the selected backendService.

headerAction specified here take effect before headerAction in the enclosing HttpRouteRule, PathMatcher and UrlMap.

headerAction is not supported for load balancers that have their loadBalancingScheme set to EXTERNAL.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToRemove[]

string

A list of header names for headers that need to be removed from the request before forwarding the request to the backendService.
defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[]

object

Headers to add to a matching request before forwarding the request to the backendService.
defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerName

string

The name of the header.
defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].headerValue

string

The value of the header to add.
defaultRouteAction.weightedBackendServices[].headerAction.requestHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToRemove[]

string

A list of header names for headers that need to be removed from the response before sending the response back to the client.
defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[]

object

Headers to add the response before sending the response back to the client.
defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerName

string

The name of the header.
defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].headerValue

string

The value of the header to add.
defaultRouteAction.weightedBackendServices[].headerAction.responseHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
defaultRouteAction.urlRewrite

object

The spec to modify the URL of the request, before forwarding the request to the matched service.

urlRewrite is the only action supported in UrlMaps for classic Application Load Balancers.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
defaultRouteAction.urlRewrite.pathPrefixRewrite

string

Before forwarding the request to the selected backend service, the matching portion of the request's path is replaced by pathPrefixRewrite.

The value must be from 1 to 1024 characters.
defaultRouteAction.urlRewrite.hostRewrite

string

Before forwarding the request to the selected service, the request's host header is replaced with contents of hostRewrite.

The value must be from 1 to 255 characters.
defaultRouteAction.urlRewrite.pathTemplateRewrite

string

If specified, the pattern rewrites the URL path (based on the :path header) using the HTTP template syntax.

A corresponding pathTemplateMatch must be specified. Any template variables must exist in the pathTemplateMatch field.

  • -At least one variable must be specified in the pathTemplateMatch field
  • You can omit variables from the rewritten URL
  • The * and ** operators cannot be matched unless they have a corresponding variable name - e.g. {format=*} or {var=**}.

For example, a pathTemplateMatch of /static/{format=**} could be rewritten as /static/content/{format} to prefix /content to the URL. Variables can also be re-ordered in a rewrite, so that /{country}/{format}/{suffix=**} can be rewritten as /content/{format}/{country}/{suffix}.

At least one non-empty routeRules[].matchRules[].path_template_match is required.

Only one of pathPrefixRewrite or pathTemplateRewrite may be specified.
defaultRouteAction.timeout

object

Specifies the timeout for the selected route. Timeout is computed from the time the request has been fully processed (known as end-of-stream) up until the response has been processed. Timeout includes all retries.

If not specified, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
defaultRouteAction.timeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
defaultRouteAction.timeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
defaultRouteAction.retryPolicy

object

Specifies the retry policy associated with this route.
defaultRouteAction.retryPolicy.retryConditions[]

string

Specifies one or more conditions when this retry policy applies. Valid values are:

  • 5xx: retry is attempted if the instance or endpoint responds with any 5xx response code, or if the instance or endpoint does not respond at all. For example, disconnects, reset, read timeout, connection failure, and refused streams.
  • gateway-error: Similar to 5xx, but only applies to response codes 502, 503 or 504.
  • connect-failure: a retry is attempted on failures connecting to the instance or endpoint. For example, connection timeouts.
  • retriable-4xx: a retry is attempted if the instance or endpoint responds with a 4xx response code. The only error that you can retry is error code 409.
  • refused-stream: a retry is attempted if the instance or endpoint resets the stream with a REFUSED_STREAM error code. This reset type indicates that it is safe to retry.
  • cancelled: a retry is attempted if the gRPC status code in the response header is set to cancelled.
  • deadline-exceeded: a retry is attempted if the gRPC status code in the response header is set to deadline-exceeded.
  • internal: a retry is attempted if the gRPC status code in the response header is set to internal.
  • resource-exhausted: a retry is attempted if the gRPC status code in the response header is set to resource-exhausted.
  • unavailable: a retry is attempted if the gRPC status code in the response header is set to unavailable.

Only the following codes are supported when the URL map is bound to target gRPC proxy that has validateForProxyless field set to true.

  • cancelled
  • deadline-exceeded
  • internal
  • resource-exhausted
  • unavailable
defaultRouteAction.retryPolicy.numRetries

integer (uint32 format)

Specifies the allowed number retries. This number must be > 0. If not specified, defaults to 1.
defaultRouteAction.retryPolicy.perTryTimeout

object

Specifies a non-zero timeout per retry attempt.

If not specified, will use the timeout set in the HttpRouteAction field. If timeout in the HttpRouteAction field is not set, this field uses the largest timeout among all backend services associated with the route.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
defaultRouteAction.retryPolicy.perTryTimeout.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
defaultRouteAction.retryPolicy.perTryTimeout.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
defaultRouteAction.requestMirrorPolicy

object

Specifies the policy on how requests intended for the route's backends are shadowed to a separate mirrored backend service. The load balancer does not wait for responses from the shadow service. Before sending traffic to the shadow service, the host / authority header is suffixed with -shadow.

Not supported when the URL map is bound to a target gRPC proxy that has the validateForProxyless field set to true.
defaultRouteAction.requestMirrorPolicy.backendService

string

The full or partial URL to the BackendService resource being mirrored to.

The backend service configured for a mirroring policy must reference backends that are of the same type as the original backend service matched in the URL map.

Serverless NEG backends are not currently supported as a mirrored backend service.
defaultRouteAction.corsPolicy

object

The specification for allowing client-side cross-origin requests. For more information about the W3C recommendation for cross-origin resource sharing (CORS), see Fetch API Living Standard.

Not supported when the URL map is bound to a target gRPC proxy.
defaultRouteAction.corsPolicy.allowOrigins[]

string

Specifies the list of origins that is allowed to do CORS requests.

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.
defaultRouteAction.corsPolicy.allowOriginRegexes[]

string

Specifies a regular expression that matches allowed origins. For more information, see regular expression syntax .

An origin is allowed if it matches either an item in allowOrigins or an item in allowOriginRegexes.

Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
defaultRouteAction.corsPolicy.allowMethods[]

string

Specifies the content for the Access-Control-Allow-Methods header.
defaultRouteAction.corsPolicy.allowHeaders[]

string

Specifies the content for the Access-Control-Allow-Headers header.
defaultRouteAction.corsPolicy.exposeHeaders[]

string

Specifies the content for the Access-Control-Expose-Headers header.
defaultRouteAction.corsPolicy.maxAge

integer

Specifies how long results of a preflight request can be cached in seconds. This field translates to the Access-Control-Max-Age header.
defaultRouteAction.corsPolicy.allowCredentials

boolean

In response to a preflight request, setting this to true indicates that the actual request can include user credentials. This field translates to the Access-Control-Allow-Credentials header.

Default is false.
defaultRouteAction.corsPolicy.disabled

boolean

If true, disables the CORS policy. The default value is false, which indicates that the CORS policy is in effect.
defaultRouteAction.faultInjectionPolicy

object

The specification for fault injection introduced into traffic to test the resiliency of clients to backend service failure. As part of fault injection, when clients send requests to a backend service, delays can be introduced by a load balancer on a percentage of requests before sending those requests to the backend service. Similarly requests from clients can be aborted by the load balancer for a percentage of requests. timeout and retryPolicy is ignored by clients that are configured with a faultInjectionPolicy if: 1. The traffic is generated by fault injection AND 2. The fault injection is not a delay fault injection. Fault injection is not supported with the classic Application Load Balancer . To see which load balancers support fault injection, see Load balancing: Routing and traffic management features.
defaultRouteAction.faultInjectionPolicy.delay

object

The specification for how client requests are delayed as part of fault injection, before being sent to a backend service.
defaultRouteAction.faultInjectionPolicy.delay.fixedDelay

object

Specifies the value of the fixed delay interval.
defaultRouteAction.faultInjectionPolicy.delay.fixedDelay.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
defaultRouteAction.faultInjectionPolicy.delay.fixedDelay.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
defaultRouteAction.faultInjectionPolicy.delay.percentage

number

The percentage of traffic for connections, operations, or requests for which a delay is introduced as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
defaultRouteAction.faultInjectionPolicy.abort

object

The specification for how client requests are aborted as part of fault injection.
defaultRouteAction.faultInjectionPolicy.abort.httpStatus

integer (uint32 format)

The HTTP status code used to abort the request.

The value must be from 200 to 599 inclusive.

For gRPC protocol, the gRPC status code is mapped to HTTP status code according to this mapping table. HTTP status 200 is mapped to gRPC status UNKNOWN. Injecting an OK status is currently not supported by Traffic Director.
defaultRouteAction.faultInjectionPolicy.abort.percentage

number

The percentage of traffic for connections, operations, or requests that is aborted as part of fault injection.

The value must be from 0.0 to 100.0 inclusive.
defaultRouteAction.maxStreamDuration

object

Specifies the maximum duration (timeout) for streams on the selected route. Unlike the timeout field where the timeout duration starts from the time the request has been fully processed (known as end-of-stream), the duration in this field is computed from the beginning of the stream until the response has been processed, including all retries. A stream that does not complete in this duration is closed.

If not specified, this field uses the maximum maxStreamDuration value among all backend services associated with the route.

This field is only allowed if the Url map is used with backend services with loadBalancingScheme set to INTERNAL_SELF_MANAGED.
defaultRouteAction.maxStreamDuration.seconds

string (int64 format)

Span of time at a resolution of a second. Must be from 0 to 315,576,000,000 inclusive. Note: these bounds are computed from: 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
defaultRouteAction.maxStreamDuration.nanos

integer

Span of time that's a fraction of a second at nanosecond resolution. Durations less than one second are represented with a 0 seconds field and a positive nanos field. Must be from 0 to 999,999,999 inclusive.
defaultUrlRedirect

object

When none of the specified hostRules match, the request is redirected to a URL specified by defaultUrlRedirect.

If defaultUrlRedirect is specified, defaultService or defaultRouteAction must not be set.

Not supported when the URL map is bound to a target gRPC proxy.
defaultUrlRedirect.hostRedirect

string

The host that is used in the redirect response instead of the one that was supplied in the request.

The value must be from 1 to 255 characters.
defaultUrlRedirect.pathRedirect

string

The path that is used in the redirect response instead of the one that was supplied in the request.

pathRedirect cannot be supplied together with prefixRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
defaultUrlRedirect.prefixRedirect

string

The prefix that replaces the prefixMatch specified in the HttpRouteRuleMatch, retaining the remaining portion of the URL before redirecting the request.

prefixRedirect cannot be supplied together with pathRedirect. Supply one alone or neither. If neither is supplied, the path of the original request is used for the redirect.

The value must be from 1 to 1024 characters.
defaultUrlRedirect.redirectResponseCode

enum

The HTTP Status code to use for this RedirectAction.

Supported values are:

  • MOVED_PERMANENTLY_DEFAULT, which is the default value and corresponds to 301.
  • FOUND, which corresponds to 302.
  • SEE_OTHER which corresponds to 303.
  • TEMPORARY_REDIRECT, which corresponds to 307. In this case, the request method is retained.
  • PERMANENT_REDIRECT, which corresponds to 308. In this case, the request method is retained.
defaultUrlRedirect.httpsRedirect

boolean

If set to true, the URL scheme in the redirected request is set to HTTPS. If set to false, the URL scheme of the redirected request remains the same as that of the request.

This must only be set for URL maps used in TargetHttpProxys. Setting this true for TargetHttpsProxy is not permitted.

The default is set to false.
defaultUrlRedirect.stripQuery

boolean

If set to true, any accompanying query portion of the original URL is removed before redirecting the request. If set to false, the query portion of the original URL is retained.

The default is set to false.

headerAction

object

Specifies changes to request and response headers that need to take effect for the selected backendService.

The headerAction specified here take effect after headerAction specified under pathMatcher.

headerAction is not supported for load balancers that have their loadBalancingScheme set to EXTERNAL.

Not supported when the URL map is bound to a target gRPC proxy that has validateForProxyless field set to true.
headerAction.requestHeadersToRemove[]

string

A list of header names for headers that need to be removed from the request before forwarding the request to the backendService.
headerAction.requestHeadersToAdd[]

object

Headers to add to a matching request before forwarding the request to the backendService.
headerAction.requestHeadersToAdd[].headerName

string

The name of the header.
headerAction.requestHeadersToAdd[].headerValue

string

The value of the header to add.
headerAction.requestHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
headerAction.responseHeadersToRemove[]

string

A list of header names for headers that need to be removed from the response before sending the response back to the client.
headerAction.responseHeadersToAdd[]

object

Headers to add the response before sending the response back to the client.
headerAction.responseHeadersToAdd[].headerName

string

The name of the header.
headerAction.responseHeadersToAdd[].headerValue

string

The value of the header to add.
headerAction.responseHeadersToAdd[].replace

boolean

If false, headerValue is appended to any values that already exist for the header. If true, headerValue is set for the header, discarding any values that were set for that header.

The default value is false.
defaultCustomErrorResponsePolicy

object

defaultCustomErrorResponsePolicy specifies how the Load Balancer returns error responses when BackendServiceor BackendBucket responds with an error.

This policy takes effect at the load balancer level and applies only when no policy has been defined for the error code at lower levels like PathMatcher, RouteRule and PathRule within this UrlMap.

For example, consider a UrlMap with the following configuration:

  • defaultCustomErrorResponsePolicy containing policies for responding to 5xx and 4xx errors
  • A PathMatcher configured for *.example.com has defaultCustomErrorResponsePolicy for 4xx.

If a request for http://www.example.com/ encounters a 404, the policy in pathMatcher.defaultCustomErrorResponsePolicy will be enforced. When the request for http://www.example.com/ encounters a 502, the policy in UrlMap.defaultCustomErrorResponsePolicy will be enforced. When a request that does not match any host in *.example.com such as http://www.myotherexample.com/, encounters a 404, UrlMap.defaultCustomErrorResponsePolicy takes effect.

When used in conjunction with defaultRouteAction.retryPolicy, retries take precedence. Only once all retries are exhausted, the defaultCustomErrorResponsePolicy is applied. While attempting a retry, if load balancer is successful in reaching the service, the defaultCustomErrorResponsePolicy is ignored and the response from the service is returned to the client.

defaultCustomErrorResponsePolicy is supported only for global external Application Load Balancers.
defaultCustomErrorResponsePolicy.errorResponseRules[]

object

Specifies rules for returning error responses.

In a given policy, if you specify rules for both a range of error codes as well as rules for specific error codes then rules with specific error codes have a higher priority. For example, assume that you configure a rule for 401 (Un-authorized) code, and another for all 4 series error codes (4XX). If the backend service returns a 401, then the rule for 401 will be applied. However if the backend service returns a 403, the rule for 4xx takes effect.
defaultCustomErrorResponsePolicy.errorResponseRules[].matchResponseCodes[]

string

Valid values include:

  • A number between 400 and 599: For example 401 or 503, in which case the load balancer applies the policy if the error code exactly matches this value.
  • 5xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 500 to 599.
  • 4xx: Load Balancer will apply the policy if the backend service responds with any response code in the range of 400 to 499.

Values must be unique within matchResponseCodes and across all errorResponseRules of CustomErrorResponsePolicy.
defaultCustomErrorResponsePolicy.errorResponseRules[].path

string

The full path to a file within backendBucket . For example: /errors/defaultError.html

path must start with a leading slash. path cannot have trailing slashes.

If the file is not available in backendBucket or the load balancer cannot reach the BackendBucket, a simple Not Found Error is returned to the client.

The value must be from 1 to 1024 characters
defaultCustomErrorResponsePolicy.errorResponseRules[].overrideResponseCode

integer

The HTTP status code returned with the response containing the custom error content. If overrideResponseCode is not supplied, the same response code returned by the original backend bucket or backend service is returned to the client.
defaultCustomErrorResponsePolicy.errorService

string

The full or partial URL to the BackendBucket resource that contains the custom error content. Examples are:

If errorService is not specified at lower levels like pathMatcher, pathRule and routeRule, an errorService specified at a higher level in the UrlMap will be used. If UrlMap.defaultCustomErrorResponsePolicy contains one or more errorResponseRules[], it must specify errorService.

If load balancer cannot reach the backendBucket, a simple Not Found Error will be returned, with the original response code (or overrideResponseCode if configured).

errorService is not supported for internal or regional HTTP/HTTPS load balancers.
fingerprint

string (bytes format)

Fingerprint of this resource. A hash of the contents stored in this object. This field is used in optimistic locking. This field is ignored when inserting a UrlMap. An up-to-date fingerprint must be provided in order to update the UrlMap, otherwise the request will fail with error 412 conditionNotMet.

To see the latest fingerprint, make a get() request to retrieve a UrlMap.

A base64-encoded string.
region

string

[Output Only] URL of the region where the regional URL map resides. This field is not applicable to global URL maps. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.

Authorization scopes

Requires one of the following OAuth scopes:

  • https://www.googleapis.com/auth/compute.readonly
  • https://www.googleapis.com/auth/compute
  • https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

IAM Permissions

In addition to any permissions specified on the fields above, authorization requires one or more of the following IAM permissions:

  • compute.urlMaps.get

To find predefined roles that contain those permissions, see Compute Engine IAM Roles.