# Compute Engine API . backendServices

## Instance Methods

Deletes the specified BackendService resource.

Returns the specified BackendService resource.

Gets the most recent health check results for this BackendService.

Creates a BackendService resource in the specified project using the data included in the request.

Retrieves the list of BackendService resources available to the specified project.

Retrieves the next page of results.

Update the entire content of the BackendService resource. This method supports patch semantics.

Update the entire content of the BackendService resource.

### Method Details

`delete(project, backendService)`

    Deletes the specified BackendService resource.

    Args:
      project: string, Name of the project scoping this request. (required)
      backendService: string, Name of the BackendService 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, backendService)`

    Returns the specified BackendService resource.

    Args:
      project: string, Name of the project scoping this request. (required)
      backendService: string, Name of the BackendService resource to return. (required)

    Returns:
      An object of the form:

        { # A BackendService resource. This resource defines a group of backend virtual machines together with their serving capacity.
          "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
          "protocol": "A String",
          "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
          "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
          "port": 42, # Deprecated in favor of port name. The TCP port to connect on the backend. The default value is 80.
          "backends": [ # The list of backends that serve this BackendService.
            { # Message containing information of one individual backend.
              "group": "A String", # The fully-qualified URL of a zonal Instance Group resource. This instance group defines the list of instances that serve traffic. Member virtual machine instances from each instance group must live in the same zone as the instance group itself. No two backends in a backend service are allowed to use same Instance Group resource.
                  #
                  # Note that you must specify an Instance Group resource using the fully-qualified URL, rather than a partial URL.
              "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
              "maxUtilization": 3.14, # Used when balancingMode is UTILIZATION. This ratio defines the CPU utilization target for the group. The default is 0.8. Valid range is [0.0, 1.0].
              "maxRatePerInstance": 3.14, # The max RPS that a single backed instance can handle. This is used to calculate the capacity of the group. Can be used in either balancing mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
              "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (either UTILIZATION or RATE). Default value is 1, which means the group will serve up to 100% of its configured CPU or RPS (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available CPU or RPS. Valid range is [0.0,1.0].
              "maxRate": 42, # The max RPS of the group. Can be used with either balancing mode, but required if RATE mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
              "balancingMode": "A String", # Specifies the balancing mode for this backend. The default is UTILIZATION but available values are UTILIZATION and RATE.
            },
          ],
          "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object. This field is used in optimistic locking. This field will be ignored when inserting a BackendService. An up-to-date fingerprint must be provided in order to update the BackendService.
          "portName": "A String", # Name of backend port. The same name should appear in the resource views referenced by this service. Required.
          "healthChecks": [ # The list of URLs to the HttpHealthCheck resource for health checking this BackendService. Currently at most one health check can be specified, and a health check is required.
            "A String",
          ],
          "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.
        }

`getHealth(project, backendService, body)`

    Gets the most recent health check results for this BackendService.

    Args:
      project: string, A parameter (required)
      backendService: string, Name of the BackendService resource to which the queried instance belongs. (required)
      body: object, The request body. (required)
        The object takes the form of:

    {
        "group": "A String", # A URI referencing one of the resource views listed in the backend service.
      }

    Returns:
      An object of the form:

        {
        "kind": "compute#backendServiceGroupHealth", # [Output Only] Type of resource. Always compute#backendServiceGroupHealth for the health of backend services.
        "healthStatus": [
          {
            "instance": "A String", # URL of the instance resource.
            "healthState": "A String", # Health state of the instance.
            "ipAddress": "A String", # The IP address represented by this resource.
            "port": 42, # The port on the instance.
          },
        ],
      }

`insert(project, body)`

    Creates a BackendService resource in the specified project using the data included in the request.

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

    { # A BackendService resource. This resource defines a group of backend virtual machines together with their serving capacity.
        "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
        "protocol": "A String",
        "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
        "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
        "port": 42, # Deprecated in favor of port name. The TCP port to connect on the backend. The default value is 80.
        "backends": [ # The list of backends that serve this BackendService.
          { # Message containing information of one individual backend.
            "group": "A String", # The fully-qualified URL of a zonal Instance Group resource. This instance group defines the list of instances that serve traffic. Member virtual machine instances from each instance group must live in the same zone as the instance group itself. No two backends in a backend service are allowed to use same Instance Group resource.
                #
                # Note that you must specify an Instance Group resource using the fully-qualified URL, rather than a partial URL.
            "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
            "maxUtilization": 3.14, # Used when balancingMode is UTILIZATION. This ratio defines the CPU utilization target for the group. The default is 0.8. Valid range is [0.0, 1.0].
            "maxRatePerInstance": 3.14, # The max RPS that a single backed instance can handle. This is used to calculate the capacity of the group. Can be used in either balancing mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
            "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (either UTILIZATION or RATE). Default value is 1, which means the group will serve up to 100% of its configured CPU or RPS (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available CPU or RPS. Valid range is [0.0,1.0].
            "maxRate": 42, # The max RPS of the group. Can be used with either balancing mode, but required if RATE mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
            "balancingMode": "A String", # Specifies the balancing mode for this backend. The default is UTILIZATION but available values are UTILIZATION and RATE.
          },
        ],
        "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object. This field is used in optimistic locking. This field will be ignored when inserting a BackendService. An up-to-date fingerprint must be provided in order to update the BackendService.
        "portName": "A String", # Name of backend port. The same name should appear in the resource views referenced by this service. Required.
        "healthChecks": [ # The list of URLs to the HttpHealthCheck resource for health checking this BackendService. Currently at most one health check can be specified, and a health check is required.
          "A String",
        ],
        "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, maxResults=None, pageToken=None, filter=None)`

    Retrieves the list of BackendService resources available to the specified project.

    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:

        { # Contains a list of BackendService resources.
        "nextPageToken": "A String", # [Output Only] A token used to continue a truncated list request.
        "items": [ # A list of BackendService resources.
          { # A BackendService resource. This resource defines a group of backend virtual machines together with their serving capacity.
              "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
              "protocol": "A String",
              "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
              "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
              "port": 42, # Deprecated in favor of port name. The TCP port to connect on the backend. The default value is 80.
              "backends": [ # The list of backends that serve this BackendService.
                { # Message containing information of one individual backend.
                  "group": "A String", # The fully-qualified URL of a zonal Instance Group resource. This instance group defines the list of instances that serve traffic. Member virtual machine instances from each instance group must live in the same zone as the instance group itself. No two backends in a backend service are allowed to use same Instance Group resource.
                      #
                      # Note that you must specify an Instance Group resource using the fully-qualified URL, rather than a partial URL.
                  "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
                  "maxUtilization": 3.14, # Used when balancingMode is UTILIZATION. This ratio defines the CPU utilization target for the group. The default is 0.8. Valid range is [0.0, 1.0].
                  "maxRatePerInstance": 3.14, # The max RPS that a single backed instance can handle. This is used to calculate the capacity of the group. Can be used in either balancing mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
                  "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (either UTILIZATION or RATE). Default value is 1, which means the group will serve up to 100% of its configured CPU or RPS (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available CPU or RPS. Valid range is [0.0,1.0].
                  "maxRate": 42, # The max RPS of the group. Can be used with either balancing mode, but required if RATE mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
                  "balancingMode": "A String", # Specifies the balancing mode for this backend. The default is UTILIZATION but available values are UTILIZATION and RATE.
                },
              ],
              "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object. This field is used in optimistic locking. This field will be ignored when inserting a BackendService. An up-to-date fingerprint must be provided in order to update the BackendService.
              "portName": "A String", # Name of backend port. The same name should appear in the resource views referenced by this service. Required.
              "healthChecks": [ # The list of URLs to the HttpHealthCheck resource for health checking this BackendService. Currently at most one health check can be specified, and a health check is required.
                "A String",
              ],
              "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#backendServiceList", # [Output Only] Type of resource. Always compute#backendServiceList for lists of backend services.
        "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, backendService, body)`

    Update the entire content of the BackendService resource. This method supports patch semantics.

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

    { # A BackendService resource. This resource defines a group of backend virtual machines together with their serving capacity.
        "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
        "protocol": "A String",
        "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
        "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
        "port": 42, # Deprecated in favor of port name. The TCP port to connect on the backend. The default value is 80.
        "backends": [ # The list of backends that serve this BackendService.
          { # Message containing information of one individual backend.
            "group": "A String", # The fully-qualified URL of a zonal Instance Group resource. This instance group defines the list of instances that serve traffic. Member virtual machine instances from each instance group must live in the same zone as the instance group itself. No two backends in a backend service are allowed to use same Instance Group resource.
                #
                # Note that you must specify an Instance Group resource using the fully-qualified URL, rather than a partial URL.
            "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
            "maxUtilization": 3.14, # Used when balancingMode is UTILIZATION. This ratio defines the CPU utilization target for the group. The default is 0.8. Valid range is [0.0, 1.0].
            "maxRatePerInstance": 3.14, # The max RPS that a single backed instance can handle. This is used to calculate the capacity of the group. Can be used in either balancing mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
            "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (either UTILIZATION or RATE). Default value is 1, which means the group will serve up to 100% of its configured CPU or RPS (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available CPU or RPS. Valid range is [0.0,1.0].
            "maxRate": 42, # The max RPS of the group. Can be used with either balancing mode, but required if RATE mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
            "balancingMode": "A String", # Specifies the balancing mode for this backend. The default is UTILIZATION but available values are UTILIZATION and RATE.
          },
        ],
        "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object. This field is used in optimistic locking. This field will be ignored when inserting a BackendService. An up-to-date fingerprint must be provided in order to update the BackendService.
        "portName": "A String", # Name of backend port. The same name should appear in the resource views referenced by this service. Required.
        "healthChecks": [ # The list of URLs to the HttpHealthCheck resource for health checking this BackendService. Currently at most one health check can be specified, and a health check is required.
          "A String",
        ],
        "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, backendService, body)`

    Update the entire content of the BackendService resource.

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

    { # A BackendService resource. This resource defines a group of backend virtual machines together with their serving capacity.
        "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
        "protocol": "A String",
        "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
        "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
        "port": 42, # Deprecated in favor of port name. The TCP port to connect on the backend. The default value is 80.
        "backends": [ # The list of backends that serve this BackendService.
          { # Message containing information of one individual backend.
            "group": "A String", # The fully-qualified URL of a zonal Instance Group resource. This instance group defines the list of instances that serve traffic. Member virtual machine instances from each instance group must live in the same zone as the instance group itself. No two backends in a backend service are allowed to use same Instance Group resource.
                #
                # Note that you must specify an Instance Group resource using the fully-qualified URL, rather than a partial URL.
            "description": "A String", # An optional textual description of the resource. Provided by the client when the resource is created.
            "maxUtilization": 3.14, # Used when balancingMode is UTILIZATION. This ratio defines the CPU utilization target for the group. The default is 0.8. Valid range is [0.0, 1.0].
            "maxRatePerInstance": 3.14, # The max RPS that a single backed instance can handle. This is used to calculate the capacity of the group. Can be used in either balancing mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
            "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (either UTILIZATION or RATE). Default value is 1, which means the group will serve up to 100% of its configured CPU or RPS (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available CPU or RPS. Valid range is [0.0,1.0].
            "maxRate": 42, # The max RPS of the group. Can be used with either balancing mode, but required if RATE mode. For RATE mode, either maxRate or maxRatePerInstance must be set.
            "balancingMode": "A String", # Specifies the balancing mode for this backend. The default is UTILIZATION but available values are UTILIZATION and RATE.
          },
        ],
        "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object. This field is used in optimistic locking. This field will be ignored when inserting a BackendService. An up-to-date fingerprint must be provided in order to update the BackendService.
        "portName": "A String", # Name of backend port. The same name should appear in the resource views referenced by this service. Required.
        "healthChecks": [ # The list of URLs to the HttpHealthCheck resource for health checking this BackendService. Currently at most one health check can be specified, and a health check is required.
          "A String",
        ],
        "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.
      }