# Compute Engine API . autoscalers

## Instance Methods

Retrieves the list of autoscalers grouped by scope.

Retrieves the next page of results.

Deletes the specified autoscaler resource.

Returns the specified autoscaler resource.

Creates an autoscaler resource in the specified project using the data included in the request.

Retrieves the list of autoscaler resources contained within the specified zone.

Retrieves the next page of results.

Updates an autoscaler resource in the specified project using the data included in the request. This method supports patch semantics.

Updates an autoscaler resource in the specified project using the data included in the request.

### Method Details

`aggregatedList(project, maxResults=None, pageToken=None, filter=None)`

    Retrieves the list of autoscalers grouped by scope.

    Args:
      project: string, Name of the project scoping this request. (required)
      maxResults: integer, Maximum count of results to be returned.
      pageToken: string, Specifies a page token to use. Use this parameter if you want to list the next page of results. Set pageToken to the nextPageToken returned by a previous list request.
      filter: string, Sets a filter expression for filtering listed resources, in the form filter={expression}. Your {expression} must be in the format: FIELD_NAME COMPARISON_STRING LITERAL_STRING.

    The FIELD_NAME is the name of the field you want to compare. Only atomic field types are supported (string, number, boolean). The COMPARISON_STRING must be either eq (equals) or ne (not equals). The LITERAL_STRING is the string value to filter to. The literal value must be valid for the type of field (string, number, boolean). For string fields, the literal value is interpreted as a regular expression using RE2 syntax. The literal value must match the entire field.

    For example, filter=name ne example-instance.

    Returns:
      An object of the form:

        {
        "nextPageToken": "A String", # [Output Only] A token used to continue a truncated list request.
        "items": { # A map of scoped autoscaler lists.
          "a_key": { # Name of the scope containing this set of autoscalers.
            "warning": { # Informational warning which replaces the list of autoscalers when the list is empty.
              "message": "A String", # [Output Only] Optional human-readable details for this warning.
              "code": "A String", # [Output Only] The warning type identifier for this warning.
              "data": [ # [Output Only] Metadata for this warning in key: value format.
                {
                  "value": "A String", # [Output Only] A warning data value corresponding to the key.
                  "key": "A String", # [Output Only] A key for the warning data.
                },
              ],
            },
            "autoscalers": [ # List of autoscalers contained in this scope.
              {
                  "kind": "compute#autoscaler", # Type of the resource.
                  "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
                  "zone": "A String", # [Output Only] URL of the zone where the instance group resides.
                  "autoscalingPolicy": { # Cloud Autoscaler policy. # Autoscaling configuration.
                    "maxNumReplicas": 42, # The maximum number of replicas that the Autoscaler can scale up to. This field is required for config to be effective. Maximum number of replicas should be not lower than minimal number of replicas. Absolute limit for this value is defined in Autoscaler backend.
                    "coolDownPeriodSec": 42, # The number of seconds that the Autoscaler should wait between two succeeding changes to the number of virtual machines. You should define an interval that is at least as long as the initialization time of a virtual machine and the time it may take for replica pool to create the virtual machine. The default is 60 seconds.
                    "loadBalancingUtilization": { # Load balancing utilization policy. # Configuration parameters of autoscaling based on load balancer.
                      "utilizationTarget": 3.14, # Fraction of backend capacity utilization (set in HTTP load balancing configuration) that Autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8. For example if your maxRatePerInstance capacity (in HTTP Load Balancing configuration) is set at 10 and you would like to keep number of instances such that each instance receives 7 QPS on average, set this to 0.7.
                    },
                    "customMetricUtilizations": [ # Configuration parameters of autoscaling based on custom metric.
                      { # Custom utilization metric policy.
                        "metric": "A String", # Identifier of the metric. It should be a Cloud Monitoring metric. The metric can not have negative values. The metric should be an utilization metric (increasing number of VMs handling requests x times should reduce average value of the metric roughly x times). For example you could use: compute.googleapis.com/instance/network/received_bytes_count.
                        "utilizationTargetType": "A String", # Defines type in which utilization_target is expressed.
                        "utilizationTarget": 3.14, # Target value of the metric which Autoscaler should maintain. Must be a positive value.
                      },
                    ],
                    "cpuUtilization": { # CPU utilization policy. # TODO(jbartosik): Add support for scaling based on muliple utilization metrics (take max recommendation). Exactly one utilization policy should be provided. Configuration parameters of CPU based autoscaling policy.
                      "utilizationTarget": 3.14, # The target utilization that the Autoscaler should maintain. It is represented as a fraction of used cores. For example: 6 cores used in 8-core VM are represented here as 0.75. Must be a float value between (0, 1]. If not defined, the default is 0.8.
                    },
                    "minNumReplicas": 42, # The minimum number of replicas that the Autoscaler can scale down to. Can't be less than 0. If not provided Autoscaler will choose default value depending on maximal number of replicas.
                  },
                  "target": "A String", # URL of Instance Group Manager or Replica Pool which will be controlled by Autoscaler.
                  "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
                  "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
                  "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
                  "name": "A 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.
                },
            ],
          },
        },
        "kind": "compute#autoscalerAggregatedList", # Type of resource.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "selfLink": "A String", # [Output Only] Server-defined URL for this resource.
      }

`aggregatedList_next(previous_request, previous_response)`

    Retrieves the next page of results.

    Args:
      previous_request: The request for the previous page. (required)
      previous_response: The response from the request for the previous page. (required)

    Returns:
      A request object that you can call 'execute()' on to request the next
      page. Returns None if there are no more items in the collection.

`delete(project, zone, autoscaler)`

    Deletes the specified autoscaler resource.

    Args:
      project: string, Name of the project scoping this request. (required)
      zone: string, Name of the zone scoping this request. (required)
      autoscaler: string, Name of the persistent autoscaler resource to delete. (required)

    Returns:
      An object of the form:

        { # An Operation resource, used to manage asynchronous API requests.
        "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
        "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all Operation resources in the project.
        "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "zone": "A String", # [Output Only] URL of the zone where the operation resides.
        "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
        "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
        "progress": 42, # [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 at when the operation will be complete. This number should monotonically increase as the operation progresses.
        "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
        "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
        "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
        "insertTime": "A String", # [Output Only] The time that this operation was requested. This is in RFC3339 text format.
        "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
          {
            "message": "A String", # [Output Only] Optional human-readable details for this warning.
            "code": "A String", # [Output Only] The warning type identifier for this warning.
            "data": [ # [Output Only] Metadata for this warning in key: value format.
              {
                "value": "A String", # [Output Only] A warning data value corresponding to the key.
                "key": "A String", # [Output Only] A key for the warning data.
              },
            ],
          },
        ],
        "user": "A String", # [Output Only] User who requested the operation, for example: user@example.com.
        "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC3339 text format.
        "kind": "compute#operation", # [Output Only] Type of the resource. Always compute#Operation for Operation resources.
        "name": "A String", # [Output Only] Name of the resource.
        "region": "A String", # [Output Only] URL of the region where the operation resides. Only applicable for regional resources.
        "error": { # [Output Only] If errors are generated during processing of the operation, this field will be populated.
          "errors": [ # [Output Only] The array of errors encountered while processing this operation.
            {
              "message": "A String", # [Output Only] An optional, human-readable error message.
              "code": "A String", # [Output Only] The error type identifier for this error.
              "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
            },
          ],
        },
        "endTime": "A String", # [Output Only] The time that this operation was completed. This is in RFC3339 text format.
        "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
      }

`get(project, zone, autoscaler)`

    Returns the specified autoscaler resource.

    Args:
      project: string, Name of the project scoping this request. (required)
      zone: string, Name of the zone scoping this request. (required)
      autoscaler: string, Name of the persistent autoscaler resource to return. (required)

    Returns:
      An object of the form:

        {
          "kind": "compute#autoscaler", # Type of the resource.
          "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
          "zone": "A String", # [Output Only] URL of the zone where the instance group resides.
          "autoscalingPolicy": { # Cloud Autoscaler policy. # Autoscaling configuration.
            "maxNumReplicas": 42, # The maximum number of replicas that the Autoscaler can scale up to. This field is required for config to be effective. Maximum number of replicas should be not lower than minimal number of replicas. Absolute limit for this value is defined in Autoscaler backend.
            "coolDownPeriodSec": 42, # The number of seconds that the Autoscaler should wait between two succeeding changes to the number of virtual machines. You should define an interval that is at least as long as the initialization time of a virtual machine and the time it may take for replica pool to create the virtual machine. The default is 60 seconds.
            "loadBalancingUtilization": { # Load balancing utilization policy. # Configuration parameters of autoscaling based on load balancer.
              "utilizationTarget": 3.14, # Fraction of backend capacity utilization (set in HTTP load balancing configuration) that Autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8. For example if your maxRatePerInstance capacity (in HTTP Load Balancing configuration) is set at 10 and you would like to keep number of instances such that each instance receives 7 QPS on average, set this to 0.7.
            },
            "customMetricUtilizations": [ # Configuration parameters of autoscaling based on custom metric.
              { # Custom utilization metric policy.
                "metric": "A String", # Identifier of the metric. It should be a Cloud Monitoring metric. The metric can not have negative values. The metric should be an utilization metric (increasing number of VMs handling requests x times should reduce average value of the metric roughly x times). For example you could use: compute.googleapis.com/instance/network/received_bytes_count.
                "utilizationTargetType": "A String", # Defines type in which utilization_target is expressed.
                "utilizationTarget": 3.14, # Target value of the metric which Autoscaler should maintain. Must be a positive value.
              },
            ],
            "cpuUtilization": { # CPU utilization policy. # TODO(jbartosik): Add support for scaling based on muliple utilization metrics (take max recommendation). Exactly one utilization policy should be provided. Configuration parameters of CPU based autoscaling policy.
              "utilizationTarget": 3.14, # The target utilization that the Autoscaler should maintain. It is represented as a fraction of used cores. For example: 6 cores used in 8-core VM are represented here as 0.75. Must be a float value between (0, 1]. If not defined, the default is 0.8.
            },
            "minNumReplicas": 42, # The minimum number of replicas that the Autoscaler can scale down to. Can't be less than 0. If not provided Autoscaler will choose default value depending on maximal number of replicas.
          },
          "target": "A String", # URL of Instance Group Manager or Replica Pool which will be controlled by Autoscaler.
          "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
          "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
          "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
          "name": "A 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.
        }

`insert(project, zone, body)`

    Creates an autoscaler resource in the specified project using the data included in the request.

    Args:
      project: string, Name of the project scoping this request. (required)
      zone: string, Name of the zone scoping this request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    {
        "kind": "compute#autoscaler", # Type of the resource.
        "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
        "zone": "A String", # [Output Only] URL of the zone where the instance group resides.
        "autoscalingPolicy": { # Cloud Autoscaler policy. # Autoscaling configuration.
          "maxNumReplicas": 42, # The maximum number of replicas that the Autoscaler can scale up to. This field is required for config to be effective. Maximum number of replicas should be not lower than minimal number of replicas. Absolute limit for this value is defined in Autoscaler backend.
          "coolDownPeriodSec": 42, # The number of seconds that the Autoscaler should wait between two succeeding changes to the number of virtual machines. You should define an interval that is at least as long as the initialization time of a virtual machine and the time it may take for replica pool to create the virtual machine. The default is 60 seconds.
          "loadBalancingUtilization": { # Load balancing utilization policy. # Configuration parameters of autoscaling based on load balancer.
            "utilizationTarget": 3.14, # Fraction of backend capacity utilization (set in HTTP load balancing configuration) that Autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8. For example if your maxRatePerInstance capacity (in HTTP Load Balancing configuration) is set at 10 and you would like to keep number of instances such that each instance receives 7 QPS on average, set this to 0.7.
          },
          "customMetricUtilizations": [ # Configuration parameters of autoscaling based on custom metric.
            { # Custom utilization metric policy.
              "metric": "A String", # Identifier of the metric. It should be a Cloud Monitoring metric. The metric can not have negative values. The metric should be an utilization metric (increasing number of VMs handling requests x times should reduce average value of the metric roughly x times). For example you could use: compute.googleapis.com/instance/network/received_bytes_count.
              "utilizationTargetType": "A String", # Defines type in which utilization_target is expressed.
              "utilizationTarget": 3.14, # Target value of the metric which Autoscaler should maintain. Must be a positive value.
            },
          ],
          "cpuUtilization": { # CPU utilization policy. # TODO(jbartosik): Add support for scaling based on muliple utilization metrics (take max recommendation). Exactly one utilization policy should be provided. Configuration parameters of CPU based autoscaling policy.
            "utilizationTarget": 3.14, # The target utilization that the Autoscaler should maintain. It is represented as a fraction of used cores. For example: 6 cores used in 8-core VM are represented here as 0.75. Must be a float value between (0, 1]. If not defined, the default is 0.8.
          },
          "minNumReplicas": 42, # The minimum number of replicas that the Autoscaler can scale down to. Can't be less than 0. If not provided Autoscaler will choose default value depending on maximal number of replicas.
        },
        "target": "A String", # URL of Instance Group Manager or Replica Pool which will be controlled by Autoscaler.
        "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        "name": "A 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.
      }

    Returns:
      An object of the form:

        { # An Operation resource, used to manage asynchronous API requests.
        "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
        "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all Operation resources in the project.
        "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "zone": "A String", # [Output Only] URL of the zone where the operation resides.
        "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
        "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
        "progress": 42, # [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 at when the operation will be complete. This number should monotonically increase as the operation progresses.
        "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
        "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
        "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
        "insertTime": "A String", # [Output Only] The time that this operation was requested. This is in RFC3339 text format.
        "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
          {
            "message": "A String", # [Output Only] Optional human-readable details for this warning.
            "code": "A String", # [Output Only] The warning type identifier for this warning.
            "data": [ # [Output Only] Metadata for this warning in key: value format.
              {
                "value": "A String", # [Output Only] A warning data value corresponding to the key.
                "key": "A String", # [Output Only] A key for the warning data.
              },
            ],
          },
        ],
        "user": "A String", # [Output Only] User who requested the operation, for example: user@example.com.
        "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC3339 text format.
        "kind": "compute#operation", # [Output Only] Type of the resource. Always compute#Operation for Operation resources.
        "name": "A String", # [Output Only] Name of the resource.
        "region": "A String", # [Output Only] URL of the region where the operation resides. Only applicable for regional resources.
        "error": { # [Output Only] If errors are generated during processing of the operation, this field will be populated.
          "errors": [ # [Output Only] The array of errors encountered while processing this operation.
            {
              "message": "A String", # [Output Only] An optional, human-readable error message.
              "code": "A String", # [Output Only] The error type identifier for this error.
              "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
            },
          ],
        },
        "endTime": "A String", # [Output Only] The time that this operation was completed. This is in RFC3339 text format.
        "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
      }

`list(project, zone, maxResults=None, pageToken=None, filter=None)`

    Retrieves the list of autoscaler resources contained within the specified zone.

    Args:
      project: string, Name of the project scoping this request. (required)
      zone: string, Name of the zone scoping this request. (required)
      maxResults: integer, Maximum count of results to be returned.
      pageToken: string, Specifies a page token to use. Use this parameter if you want to list the next page of results. Set pageToken to the nextPageToken returned by a previous list request.
      filter: string, Sets a filter expression for filtering listed resources, in the form filter={expression}. Your {expression} must be in the format: FIELD_NAME COMPARISON_STRING LITERAL_STRING.

    The FIELD_NAME is the name of the field you want to compare. Only atomic field types are supported (string, number, boolean). The COMPARISON_STRING must be either eq (equals) or ne (not equals). The LITERAL_STRING is the string value to filter to. The literal value must be valid for the type of field (string, number, boolean). For string fields, the literal value is interpreted as a regular expression using RE2 syntax. The literal value must match the entire field.

    For example, filter=name ne example-instance.

    Returns:
      An object of the form:

        { # Contains a list of persistent autoscaler resources.
        "nextPageToken": "A String", # [Output Only] A token used to continue a truncated list request.
        "items": [ # A list of Autoscaler resources.
          {
              "kind": "compute#autoscaler", # Type of the resource.
              "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
              "zone": "A String", # [Output Only] URL of the zone where the instance group resides.
              "autoscalingPolicy": { # Cloud Autoscaler policy. # Autoscaling configuration.
                "maxNumReplicas": 42, # The maximum number of replicas that the Autoscaler can scale up to. This field is required for config to be effective. Maximum number of replicas should be not lower than minimal number of replicas. Absolute limit for this value is defined in Autoscaler backend.
                "coolDownPeriodSec": 42, # The number of seconds that the Autoscaler should wait between two succeeding changes to the number of virtual machines. You should define an interval that is at least as long as the initialization time of a virtual machine and the time it may take for replica pool to create the virtual machine. The default is 60 seconds.
                "loadBalancingUtilization": { # Load balancing utilization policy. # Configuration parameters of autoscaling based on load balancer.
                  "utilizationTarget": 3.14, # Fraction of backend capacity utilization (set in HTTP load balancing configuration) that Autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8. For example if your maxRatePerInstance capacity (in HTTP Load Balancing configuration) is set at 10 and you would like to keep number of instances such that each instance receives 7 QPS on average, set this to 0.7.
                },
                "customMetricUtilizations": [ # Configuration parameters of autoscaling based on custom metric.
                  { # Custom utilization metric policy.
                    "metric": "A String", # Identifier of the metric. It should be a Cloud Monitoring metric. The metric can not have negative values. The metric should be an utilization metric (increasing number of VMs handling requests x times should reduce average value of the metric roughly x times). For example you could use: compute.googleapis.com/instance/network/received_bytes_count.
                    "utilizationTargetType": "A String", # Defines type in which utilization_target is expressed.
                    "utilizationTarget": 3.14, # Target value of the metric which Autoscaler should maintain. Must be a positive value.
                  },
                ],
                "cpuUtilization": { # CPU utilization policy. # TODO(jbartosik): Add support for scaling based on muliple utilization metrics (take max recommendation). Exactly one utilization policy should be provided. Configuration parameters of CPU based autoscaling policy.
                  "utilizationTarget": 3.14, # The target utilization that the Autoscaler should maintain. It is represented as a fraction of used cores. For example: 6 cores used in 8-core VM are represented here as 0.75. Must be a float value between (0, 1]. If not defined, the default is 0.8.
                },
                "minNumReplicas": 42, # The minimum number of replicas that the Autoscaler can scale down to. Can't be less than 0. If not provided Autoscaler will choose default value depending on maximal number of replicas.
              },
              "target": "A String", # URL of Instance Group Manager or Replica Pool which will be controlled by Autoscaler.
              "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
              "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
              "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
              "name": "A 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.
            },
        ],
        "kind": "compute#autoscalerList", # Type of resource.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "selfLink": "A String", # [Output Only] Server-defined URL for this resource.
      }

`list_next(previous_request, previous_response)`

    Retrieves the next page of results.

    Args:
      previous_request: The request for the previous page. (required)
      previous_response: The response from the request for the previous page. (required)

    Returns:
      A request object that you can call 'execute()' on to request the next
      page. Returns None if there are no more items in the collection.

`patch(project, zone, autoscaler, body)`

    Updates an autoscaler resource in the specified project using the data included in the request. This method supports patch semantics.

    Args:
      project: string, Name of the project scoping this request. (required)
      zone: string, Name of the zone scoping this request. (required)
      autoscaler: string, Name of the autoscaler resource to update. (required)
      body: object, The request body. (required)
        The object takes the form of:

    {
        "kind": "compute#autoscaler", # Type of the resource.
        "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
        "zone": "A String", # [Output Only] URL of the zone where the instance group resides.
        "autoscalingPolicy": { # Cloud Autoscaler policy. # Autoscaling configuration.
          "maxNumReplicas": 42, # The maximum number of replicas that the Autoscaler can scale up to. This field is required for config to be effective. Maximum number of replicas should be not lower than minimal number of replicas. Absolute limit for this value is defined in Autoscaler backend.
          "coolDownPeriodSec": 42, # The number of seconds that the Autoscaler should wait between two succeeding changes to the number of virtual machines. You should define an interval that is at least as long as the initialization time of a virtual machine and the time it may take for replica pool to create the virtual machine. The default is 60 seconds.
          "loadBalancingUtilization": { # Load balancing utilization policy. # Configuration parameters of autoscaling based on load balancer.
            "utilizationTarget": 3.14, # Fraction of backend capacity utilization (set in HTTP load balancing configuration) that Autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8. For example if your maxRatePerInstance capacity (in HTTP Load Balancing configuration) is set at 10 and you would like to keep number of instances such that each instance receives 7 QPS on average, set this to 0.7.
          },
          "customMetricUtilizations": [ # Configuration parameters of autoscaling based on custom metric.
            { # Custom utilization metric policy.
              "metric": "A String", # Identifier of the metric. It should be a Cloud Monitoring metric. The metric can not have negative values. The metric should be an utilization metric (increasing number of VMs handling requests x times should reduce average value of the metric roughly x times). For example you could use: compute.googleapis.com/instance/network/received_bytes_count.
              "utilizationTargetType": "A String", # Defines type in which utilization_target is expressed.
              "utilizationTarget": 3.14, # Target value of the metric which Autoscaler should maintain. Must be a positive value.
            },
          ],
          "cpuUtilization": { # CPU utilization policy. # TODO(jbartosik): Add support for scaling based on muliple utilization metrics (take max recommendation). Exactly one utilization policy should be provided. Configuration parameters of CPU based autoscaling policy.
            "utilizationTarget": 3.14, # The target utilization that the Autoscaler should maintain. It is represented as a fraction of used cores. For example: 6 cores used in 8-core VM are represented here as 0.75. Must be a float value between (0, 1]. If not defined, the default is 0.8.
          },
          "minNumReplicas": 42, # The minimum number of replicas that the Autoscaler can scale down to. Can't be less than 0. If not provided Autoscaler will choose default value depending on maximal number of replicas.
        },
        "target": "A String", # URL of Instance Group Manager or Replica Pool which will be controlled by Autoscaler.
        "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        "name": "A 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.
      }

    Returns:
      An object of the form:

        { # An Operation resource, used to manage asynchronous API requests.
        "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
        "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all Operation resources in the project.
        "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "zone": "A String", # [Output Only] URL of the zone where the operation resides.
        "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
        "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
        "progress": 42, # [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 at when the operation will be complete. This number should monotonically increase as the operation progresses.
        "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
        "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
        "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
        "insertTime": "A String", # [Output Only] The time that this operation was requested. This is in RFC3339 text format.
        "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
          {
            "message": "A String", # [Output Only] Optional human-readable details for this warning.
            "code": "A String", # [Output Only] The warning type identifier for this warning.
            "data": [ # [Output Only] Metadata for this warning in key: value format.
              {
                "value": "A String", # [Output Only] A warning data value corresponding to the key.
                "key": "A String", # [Output Only] A key for the warning data.
              },
            ],
          },
        ],
        "user": "A String", # [Output Only] User who requested the operation, for example: user@example.com.
        "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC3339 text format.
        "kind": "compute#operation", # [Output Only] Type of the resource. Always compute#Operation for Operation resources.
        "name": "A String", # [Output Only] Name of the resource.
        "region": "A String", # [Output Only] URL of the region where the operation resides. Only applicable for regional resources.
        "error": { # [Output Only] If errors are generated during processing of the operation, this field will be populated.
          "errors": [ # [Output Only] The array of errors encountered while processing this operation.
            {
              "message": "A String", # [Output Only] An optional, human-readable error message.
              "code": "A String", # [Output Only] The error type identifier for this error.
              "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
            },
          ],
        },
        "endTime": "A String", # [Output Only] The time that this operation was completed. This is in RFC3339 text format.
        "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
      }

`update(project, zone, body, autoscaler=None)`

    Updates an autoscaler resource in the specified project using the data included in the request.

    Args:
      project: string, Name of the project scoping this request. (required)
      zone: string, Name of the zone scoping this request. (required)
      body: object, The request body. (required)
        The object takes the form of:

    {
        "kind": "compute#autoscaler", # Type of the resource.
        "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
        "zone": "A String", # [Output Only] URL of the zone where the instance group resides.
        "autoscalingPolicy": { # Cloud Autoscaler policy. # Autoscaling configuration.
          "maxNumReplicas": 42, # The maximum number of replicas that the Autoscaler can scale up to. This field is required for config to be effective. Maximum number of replicas should be not lower than minimal number of replicas. Absolute limit for this value is defined in Autoscaler backend.
          "coolDownPeriodSec": 42, # The number of seconds that the Autoscaler should wait between two succeeding changes to the number of virtual machines. You should define an interval that is at least as long as the initialization time of a virtual machine and the time it may take for replica pool to create the virtual machine. The default is 60 seconds.
          "loadBalancingUtilization": { # Load balancing utilization policy. # Configuration parameters of autoscaling based on load balancer.
            "utilizationTarget": 3.14, # Fraction of backend capacity utilization (set in HTTP load balancing configuration) that Autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8. For example if your maxRatePerInstance capacity (in HTTP Load Balancing configuration) is set at 10 and you would like to keep number of instances such that each instance receives 7 QPS on average, set this to 0.7.
          },
          "customMetricUtilizations": [ # Configuration parameters of autoscaling based on custom metric.
            { # Custom utilization metric policy.
              "metric": "A String", # Identifier of the metric. It should be a Cloud Monitoring metric. The metric can not have negative values. The metric should be an utilization metric (increasing number of VMs handling requests x times should reduce average value of the metric roughly x times). For example you could use: compute.googleapis.com/instance/network/received_bytes_count.
              "utilizationTargetType": "A String", # Defines type in which utilization_target is expressed.
              "utilizationTarget": 3.14, # Target value of the metric which Autoscaler should maintain. Must be a positive value.
            },
          ],
          "cpuUtilization": { # CPU utilization policy. # TODO(jbartosik): Add support for scaling based on muliple utilization metrics (take max recommendation). Exactly one utilization policy should be provided. Configuration parameters of CPU based autoscaling policy.
            "utilizationTarget": 3.14, # The target utilization that the Autoscaler should maintain. It is represented as a fraction of used cores. For example: 6 cores used in 8-core VM are represented here as 0.75. Must be a float value between (0, 1]. If not defined, the default is 0.8.
          },
          "minNumReplicas": 42, # The minimum number of replicas that the Autoscaler can scale down to. Can't be less than 0. If not provided Autoscaler will choose default value depending on maximal number of replicas.
        },
        "target": "A String", # URL of Instance Group Manager or Replica Pool which will be controlled by Autoscaler.
        "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        "name": "A 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.
      }

      autoscaler: string, Name of the autoscaler resource to update.

    Returns:
      An object of the form:

        { # An Operation resource, used to manage asynchronous API requests.
        "targetId": "A String", # [Output Only] Unique target ID which identifies a particular incarnation of the target.
        "clientOperationId": "A String", # [Output Only] An optional identifier specified by the client when the mutation was initiated. Must be unique for all Operation resources in the project.
        "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
        "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
        "zone": "A String", # [Output Only] URL of the zone where the operation resides.
        "operationType": "A String", # [Output Only] Type of the operation, such as insert, update, and delete.
        "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as NOT FOUND.
        "progress": 42, # [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 at when the operation will be complete. This number should monotonically increase as the operation progresses.
        "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error message that was returned, such as 404.
        "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
        "status": "A String", # [Output Only] Status of the operation. Can be one of the following: PENDING, RUNNING, or DONE.
        "insertTime": "A String", # [Output Only] The time that this operation was requested. This is in RFC3339 text format.
        "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
          {
            "message": "A String", # [Output Only] Optional human-readable details for this warning.
            "code": "A String", # [Output Only] The warning type identifier for this warning.
            "data": [ # [Output Only] Metadata for this warning in key: value format.
              {
                "value": "A String", # [Output Only] A warning data value corresponding to the key.
                "key": "A String", # [Output Only] A key for the warning data.
              },
            ],
          },
        ],
        "user": "A String", # [Output Only] User who requested the operation, for example: user@example.com.
        "startTime": "A String", # [Output Only] The time that this operation was started by the server. This is in RFC3339 text format.
        "kind": "compute#operation", # [Output Only] Type of the resource. Always compute#Operation for Operation resources.
        "name": "A String", # [Output Only] Name of the resource.
        "region": "A String", # [Output Only] URL of the region where the operation resides. Only applicable for regional resources.
        "error": { # [Output Only] If errors are generated during processing of the operation, this field will be populated.
          "errors": [ # [Output Only] The array of errors encountered while processing this operation.
            {
              "message": "A String", # [Output Only] An optional, human-readable error message.
              "code": "A String", # [Output Only] The error type identifier for this error.
              "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
            },
          ],
        },
        "endTime": "A String", # [Output Only] The time that this operation was completed. This is in RFC3339 text format.
        "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        "targetLink": "A String", # [Output Only] URL of the resource the operation is mutating.
      }