REST Resource: backendServices

Resource: BackendService

Represents a Backend Service resource.

A backend service defines how Google Cloud load balancers distribute traffic. The backend service configuration contains a set of values, such as the protocol used to connect to backends, various distribution and session settings, health checks, and timeouts. These settings provide fine-grained control over how your load balancer behaves. Most of the settings have default values that allow for easy configuration if you need to get started quickly.

Backend services in Google Compute Engine can be either regionally or globally scoped.

For more information, see Backend Services.

JSON representation
{
  "id": string,
  "creationTimestamp": string,
  "name": string,
  "description": string,
  "selfLink": string,
  "backends": [
    {
      "description": string,
      "group": string,
      "balancingMode": enum,
      "maxUtilization": number,
      "maxRate": integer,
      "maxRatePerInstance": number,
      "maxRatePerEndpoint": number,
      "maxConnections": integer,
      "maxConnectionsPerInstance": integer,
      "maxConnectionsPerEndpoint": integer,
      "capacityScaler": number,
      "failover": boolean
    }
  ],
  "healthChecks": [
    string
  ],
  "timeoutSec": integer,
  "port": integer,
  "protocol": enum,
  "fingerprint": string,
  "portName": string,
  "enableCDN": boolean,
  "sessionAffinity": enum,
  "affinityCookieTtlSec": integer,
  "region": string,
  "failoverPolicy": {
    "disableConnectionDrainOnFailover": boolean,
    "dropTrafficIfUnhealthy": boolean,
    "failoverRatio": number
  },
  "loadBalancingScheme": enum,
  "connectionDraining": {
    "drainingTimeoutSec": integer
  },
  "iap": {
    "enabled": boolean,
    "oauth2ClientId": string,
    "oauth2ClientSecret": string,
    "oauth2ClientSecretSha256": string
  },
  "cdnPolicy": {
    "cacheKeyPolicy": {
      "includeProtocol": boolean,
      "includeHost": boolean,
      "includeQueryString": boolean,
      "queryStringWhitelist": [
        string
      ],
      "queryStringBlacklist": [
        string
      ]
    },
    "signedUrlKeyNames": [
      string
    ],
    "signedUrlCacheMaxAgeSec": string,
    "requestCoalescing": boolean,
    "cacheMode": enum,
    "defaultTtl": integer,
    "maxTtl": integer,
    "clientTtl": integer,
    "negativeCaching": boolean,
    "negativeCachingPolicy": [
      {
        "code": integer,
        "ttl": integer
      }
    ],
    "bypassCacheOnRequestHeaders": [
      {
        "headerName": string
      }
    ],
    "serveWhileStale": integer
  },
  "customRequestHeaders": [
    string
  ],
  "customResponseHeaders": [
    string
  ],
  "securityPolicy": string,
  "logConfig": {
    "enable": boolean,
    "sampleRate": number
  },
  "securitySettings": {
    "clientTlsPolicy": string,
    "subjectAltNames": [
      string
    ]
  },
  "localityLbPolicy": enum,
  "consistentHash": {
    "httpCookie": {
      "name": string,
      "path": string,
      "ttl": {
        "seconds": string,
        "nanos": integer
      }
    },
    "httpHeaderName": string,
    "minimumRingSize": string
  },
  "circuitBreakers": {
    "maxRequestsPerConnection": integer,
    "maxConnections": integer,
    "maxPendingRequests": integer,
    "maxRequests": integer,
    "maxRetries": integer
  },
  "outlierDetection": {
    "consecutiveErrors": integer,
    "interval": {
      "seconds": string,
      "nanos": integer
    },
    "baseEjectionTime": {
      "seconds": string,
      "nanos": integer
    },
    "maxEjectionPercent": integer,
    "enforcingConsecutiveErrors": integer,
    "enforcingSuccessRate": integer,
    "successRateMinimumHosts": integer,
    "successRateRequestVolume": integer,
    "successRateStdevFactor": integer,
    "consecutiveGatewayFailure": integer,
    "enforcingConsecutiveGatewayFailure": integer
  },
  "network": string,
  "maxStreamDuration": {
    "seconds": string,
    "nanos": integer
  },
  "kind": string
}
Fields
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.

backends[]

object

The list of backends that serve this BackendService.

backends[].description

string

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

backends[].group

string

The fully-qualified URL of an instance group or network endpoint group (NEG) resource. To determine what types of backends a load balancer supports, see the Backend services overview.

You must use the fully-qualified URL (starting with https://www.googleapis.com/) to specify the instance group or NEG. Partial URLs are not supported.

backends[].balancingMode

enum

Specifies how to determine whether the backend of a load balancer can handle additional traffic or is fully loaded. For usage guidelines, see Connection balancing mode.

Backends must use compatible balancing modes. For more information, see Supported balancing modes and target capacity settings and Restrictions and guidance for instance groups.

Note: Currently, if you use the API to configure incompatible balancing modes, the configuration might be accepted even though it has no impact and is ignored. Specifically, Backend.maxUtilization is ignored when Backend.balancingMode is RATE. In the future, this incompatible combination will be rejected.

backends[].maxUtilization

number

Optional parameter to define a target capacity for the UTILIZATIONbalancing mode. The valid range is [0.0, 1.0].

For usage guidelines, see Utilization balancing mode.

backends[].maxRate

integer

Defines a maximum number of HTTP requests per second (RPS). For usage guidelines, see Rate balancing mode and Utilization balancing mode.

Not available if the backend's balancingMode is CONNECTION.

backends[].maxRatePerInstance

number

Defines a maximum target for requests per second (RPS). For usage guidelines, see Rate balancing mode and Utilization balancing mode.

Not available if the backend's balancingMode is CONNECTION.

backends[].maxRatePerEndpoint

number

Defines a maximum target for requests per second (RPS). For usage guidelines, see Rate balancing mode and Utilization balancing mode.

Not available if the backend's balancingMode is CONNECTION.

backends[].maxConnections

integer

Defines a target maximum number of simultaneous connections. For usage guidelines, see Connection balancing mode and Utilization balancing mode. Not available if the backend's balancingMode is RATE.

backends[].maxConnectionsPerInstance

integer

Defines a target maximum number of simultaneous connections. For usage guidelines, see Connection balancing mode and Utilization balancing mode.

Not available if the backend's balancingMode is RATE.

backends[].maxConnectionsPerEndpoint