Method: regionInstanceGroupManagers.resizeAdvanced

Resizes the regional managed instance group with advanced configuration options like disabling creation retries. This is an extended version of the resize method.

If you increase the size, the group creates new instances using the current instance template. If you decrease the size, the group deletes one or more instances.

The resize operation is marked DONE if the resize request is successful. The underlying actions take additional time. You must separately verify the status of the creating or deleting actions with the get or listmanagedinstances method.

If the group is part of a backend service that has enabled connection draining, it can take up to 60 seconds after the connection draining duration has elapsed before the VM instance is removed or deleted.

HTTP request

POST https://compute.googleapis.com/compute/beta/projects/{project}/regions/{region}/instanceGroupManagers/{instanceGroupManager}/resizeAdvanced

The URL uses gRPC Transcoding syntax.

Path parameters

Parameters
project

string

Project ID for this request.
region

string

Name of the region scoping this request. It must be a string that meets the requirements in RFC1035.
instanceGroupManager

string

The name of the managed instance group. It must be a string that meets the requirements in RFC1035.

Authorization requires the following IAM permission on the specified resource instanceGroupManager:

  • compute.instanceGroupManagers.update

Query parameters

Parameters
requestId

string

An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed.

For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments.

The request ID must be a valid UUID with the exception that zero UUID is not supported (00000000-0000-0000-0000-000000000000).

Request body

The request body contains data with the following structure:

JSON representation 
{
  "targetSize": integer,
  "noCreationRetries": boolean
}
Fields
targetSize

integer

The number of running instances that the managed instance group should maintain at any given time. The group automatically adds or removes instances to maintain the number of instances specified by this parameter.
noCreationRetries

boolean

If this flag is true, the managed instance group attempts to create all instances initiated by this resize request only once. If there is an error during creation, the managed instance group does not retry create this instance, and we will decrease the targetSize of the request instead. If the flag is false, the group attempts to recreate each instance continuously until it succeeds.

This flag matters only in the first attempt of creation of an instance. After an instance is successfully created while this flag is enabled, the instance behaves the same way as all the other instances created with a regular resize request. In particular, if a running instance dies unexpectedly at a later time and needs to be recreated, this mode does not affect the recreation behavior in that scenario.

This flag is applicable only to the current resize request. It does not influence other resize requests in any way.

You can see which instances ar being created in which mode by calling the get or listManagedInstances API.

Response body

Represents an Operation resource.

Google Compute Engine has three Operation resources:

You can use an operation resource to manage asynchronous API requests. For more information, read Handling API responses.

Operations can be global, regional or zonal.

  • For global operations, use the globalOperations resource.
  • For regional operations, use the regionOperations resource.
  • For zonal operations, use the zoneOperations resource.

For more information, read Global, Regional, and Zonal Resources.

Note that completed Operation resources have a limited retention period.

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

JSON representation 
{
  "kind": string,
  "id": string,
  "creationTimestamp": string,
  "name": string,
  "zone": string,
  "clientOperationId": string,
  "operationType": string,
  "targetLink": string,
  "targetId": string,
  "status": enum,
  "statusMessage": string,
  "user": string,
  "progress": integer,
  "insertTime": string,
  "startTime": string,
  "endTime": string,
  "error": {
    "errors": [
      {
        "code": string,
        "location": string,
        "message": string,
        "errorDetails": [
          {
            "errorInfo": {
              "reason": string,
              "domain": string,
              "metadatas": {
                string: string,
                ...
              }
            },
            "quotaInfo": {
              "metricName": string,
              "limitName": string,
              "dimensions": {
                string: string,
                ...
              },
              "limit": number,
              "futureLimit": number,
              "rolloutStatus": enum
            },
            "help": {
              "links": [
                {
                  "description": string,
                  "url": string
                }
              ]
            },
            "localizedMessage": {
              "locale": string,
              "message": string
            }
          }
        ]
      }
    ]
  },
  "warnings": [
    {
      "code": enum,
      "message": string,
      "data": [
        {
          "key": string,
          "value": string
        }
      ]
    }
  ],
  "httpErrorStatusCode": integer,
  "httpErrorMessage": string,
  "selfLink": string,
  "region": string,
  "description": string,
  "operationGroupId": string,

  // Union field metadata can be only one of the following:
  "setCommonInstanceMetadataOperationMetadata": {
    "clientOperationId": string,
    "perLocationOperations": {
      string: {
        "state": enum,
        "error": {
          "code": integer,
          "message": string,
          "details": [
            {
              "@type": string,
              field1: ...,
              ...
            }
          ]
        }
      },
      ...
    }
  },
  "instancesBulkInsertOperationMetadata": {
    "perLocationStatus": {
      string: {
        "status": enum,
        "targetVmCount": integer,
        "createdVmCount": integer,
        "failedToCreateVmCount": integer,
        "deletedVmCount": integer
      },
      ...
    }
  }
  // End of list of possible types for union field metadata.
}
Fields
kind

string

[Output Only] Type of the resource. Always compute#operation for Operation resources.
id

string (uint64 format)

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

string

[Deprecated] This field is deprecated.
name

string

[Output Only] Name of the operation.
zone

string

[Output Only] The URL of the zone where the operation resides. Only applicable when performing per-zone operations.
clientOperationId

string

[Output Only] The value of requestId if you provided it in the request. Not present otherwise.
operationType

string

[Output Only] The type of operation, such as insert, update, or delete, and so on.
targetId

string (uint64 format)

[Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
status

enum

[Output Only] The status of the operation, which can be one of the following: PENDING, RUNNING, or DONE.
statusMessage

string

[Output Only] An optional textual description of the current status of the operation.
user

string

[Output Only] User who requested the operation, for example: user@example.com or alice_smith_identifier (global/workforcePools/example-com-us-employees).
progress

integer

[Output Only] An optional progress indicator that ranges from 0 to 100. There is no requirement that this be linear or support any granularity of operations. This should not be used to guess when the operation will be complete. This number should monotonically increase as the operation progresses.
insertTime

string

[Output Only] The time that this operation was requested. This value is in RFC3339 text format.
startTime

string

[Output Only] The time that this operation was started by the server. This value is in RFC3339 text format.
endTime

string

[Output Only] The time that this operation was completed. This value is in RFC3339 text format.
error

object

[Output Only] If errors are generated during processing of the operation, this field will be populated.
error.errors[]

object

[Output Only] The array of errors encountered while processing this operation.
error.errors[].code

string

[Output Only] The error type identifier for this error.
error.errors[].location

string

[Output Only] Indicates the field in the request that caused the error. This property is optional.
error.errors[].message

string

[Output Only] An optional, human-readable error message.
error.errors[].errorDetails[]

object

[Output Only] An optional list of messages that contain the error details. There is a set of defined message types to use for providing details.The syntax depends on the error code. For example, QuotaExceededInfo will have details when the error code is QUOTA_EXCEEDED.
error.errors[].errorDetails[].errorInfo

object
error.errors[].errorDetails[].errorInfo.reason

string

The reason of the error. This is a constant value that identifies the proximate cause of the error. Error reasons are unique within a particular domain of errors. This should be at most 63 characters and match a regular expression of [A-Z][A-Z0-9_]+[A-Z0-9], which represents UPPER_SNAKE_CASE.
error.errors[].errorDetails[].errorInfo.domain

string

The logical grouping to which the "reason" belongs. The error domain is typically the registered service name of the tool or product that generates the error. Example: "pubsub.googleapis.com". If the error is generated by some common infrastructure, the error domain must be a globally unique value that identifies the infrastructure. For Google API infrastructure, the error domain is "googleapis.com".
error.errors[].errorDetails[].errorInfo.metadatas

map (key: string, value: string)

Additional structured details about this error.

Keys must match /[a-z][a-zA-Z0-9-_]+/ but should ideally be lowerCamelCase. Also they must be limited to 64 characters in length. When identifying the current value of an exceeded limit, the units should be contained in the key, not the value. For example, rather than {"instanceLimit": "100/request"}, should be returned as, {"instanceLimitPerRequest": "100"}, if the client exceeds the number of instances that can be created in a single (batch) request.
error.errors[].errorDetails[].quotaInfo

object
error.errors[].errorDetails[].quotaInfo.metricName

string

The Compute Engine quota metric name.
error.errors[].errorDetails[].quotaInfo.limitName

string

The name of the quota limit.
error.errors[].errorDetails[].quotaInfo.dimensions

map (key: string, value: string)

The map holding related quota dimensions.
error.errors[].errorDetails[].quotaInfo.limit

number

Current effective quota limit. The limit's unit depends on the quota type or metric.
error.errors[].errorDetails[].quotaInfo.futureLimit

number

Future quota limit being rolled out. The limit's unit depends on the quota type or metric.
error.errors[].errorDetails[].quotaInfo.rolloutStatus

enum

Rollout status of the future quota limit.
error.errors[].errorDetails[].help

object
error.errors[].errorDetails[].help.links[]

object

URL(s) pointing to additional information on handling the current error.
error.errors[].errorDetails[].help.links[].description

string

Describes what the link offers.
error.errors[].errorDetails[].help.links[].url

string

The URL of the link.
error.errors[].errorDetails[].localizedMessage

object
error.errors[].errorDetails[].localizedMessage.locale

string

The locale used following the specification defined at https://www.rfc-editor.org/rfc/bcp/bcp47.txt. Examples are: "en-US", "fr-CH", "es-MX"
error.errors[].errorDetails[].localizedMessage.message

string

The localized error message in the above locale.
warnings[]

object

[Output Only] If warning messages are generated during processing of the operation, this field will be populated.
warnings[].code

enum

[Output Only] A warning code, if applicable. For example, Compute Engine returns NO_RESULTS_ON_PAGE if there are no results in the response.
warnings[].message

string

[Output Only] A human-readable description of the warning code.
warnings[].data[]

object

[Output Only] Metadata about this warning in key: value format. For example: 

"data": [  {  "key": "scope",  "value": "zones/us-east1-d"  }
warnings[].data[].key

string

[Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
warnings[].data[].value

string

[Output Only] A warning data value corresponding to the key.
httpErrorStatusCode

integer

[Output Only] If the operation fails, this field contains the HTTP error status code that was returned. For example, a 404 means the resource was not found.
httpErrorMessage

string

[Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
region

string

[Output Only] The URL of the region where the operation resides. Only applicable when performing regional operations.
description

string

[Output Only] A textual description of the operation, which is set when the operation is created.
operationGroupId

string

[Output Only] An ID that represents a group of operations, such as when a group of operations results from a bulkInsert API request.
Union field metadata. [Output Only] Service-specific metadata attached to this operation. metadata can be only one of the following:
setCommonInstanceMetadataOperationMetadata

object

[Output Only] If the operation is for projects.setCommonInstanceMetadata, this field will contain information on all underlying zonal actions and their state.
setCommonInstanceMetadataOperationMetadata.clientOperationId

string

[Output Only] The client operation id.
setCommonInstanceMetadataOperationMetadata.perLocationOperations[]

map (key: string, value: object)

[Output Only] Status information per location (location name is key). Example key: zones/us-central1-a
setCommonInstanceMetadataOperationMetadata.perLocationOperations[].state

enum

[Output Only] Status of the action, which can be one of the following: PROPAGATING, PROPAGATED, ABANDONED, FAILED, or DONE.
setCommonInstanceMetadataOperationMetadata.perLocationOperations[].error

object

[Output Only] If state is ABANDONED or FAILED, this field is populated.
setCommonInstanceMetadataOperationMetadata.perLocationOperations[].error.code

integer

The status code, which should be an enum value of google.rpc.Code.
setCommonInstanceMetadataOperationMetadata.perLocationOperations[].error.message

string

A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the google.rpc.Status.details field, or localized by the client.
setCommonInstanceMetadataOperationMetadata.perLocationOperations[].error.details[]

object

A list of messages that carry the error details. There is a common set of message types for APIs to use.

An object containing fields of an arbitrary type. An additional field "@type" contains a URI identifying the type. Example: { "id": 1234, "@type": "types.example.com/standard/id" }.
instancesBulkInsertOperationMetadata

object
instancesBulkInsertOperationMetadata.perLocationStatus[]

map (key: string, value: object)

Status information per location (location name is key). Example key: zones/us-central1-a
instancesBulkInsertOperationMetadata.perLocationStatus[].status

enum

[Output Only] Creation status of BulkInsert operation - information if the flow is rolling forward or rolling back.
instancesBulkInsertOperationMetadata.perLocationStatus[].targetVmCount

integer

[Output Only] Count of VMs originally planned to be created.
instancesBulkInsertOperationMetadata.perLocationStatus[].createdVmCount

integer

[Output Only] Count of VMs successfully created so far.
instancesBulkInsertOperationMetadata.perLocationStatus[].failedToCreateVmCount

integer

[Output Only] Count of VMs that started creating but encountered an error.
instancesBulkInsertOperationMetadata.perLocationStatus[].deletedVmCount

integer

[Output Only] Count of VMs that got deleted during rollback.

Authorization scopes

Requires one of the following OAuth scopes:

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

For more information, see the Authentication Overview.