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<h1><a href="compute_v1.html">Compute Engine API</a> . <a href="compute_v1.backendServices.html">backendServices</a></h1>
<h2>Instance Methods</h2>
<p class="toc_element">
  <code><a href="#delete">delete(project, backendService)</a></code></p>
<p class="firstline">Deletes the specified BackendService resource.</p>
<p class="toc_element">
  <code><a href="#get">get(project, backendService)</a></code></p>
<p class="firstline">Returns the specified BackendService resource. Get a list of available backend services by making a list() request.</p>
<p class="toc_element">
  <code><a href="#getHealth">getHealth(project, backendService, body)</a></code></p>
<p class="firstline">Gets the most recent health check results for this BackendService.</p>
<p class="toc_element">
  <code><a href="#insert">insert(project, body)</a></code></p>
<p class="firstline">Creates a BackendService resource in the specified project using the data included in the request. There are several restrictions and guidelines to keep in mind when creating a backend service. Read  Restrictions and Guidelines for more information.</p>
<p class="toc_element">
  <code><a href="#list">list(project, maxResults=None, pageToken=None, filter=None)</a></code></p>
<p class="firstline">Retrieves the list of BackendService resources available to the specified project.</p>
<p class="toc_element">
  <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
<p class="firstline">Retrieves the next page of results.</p>
<p class="toc_element">
  <code><a href="#patch">patch(project, backendService, body)</a></code></p>
<p class="firstline">Updates the entire content of the BackendService resource. There are several restrictions and guidelines to keep in mind when updating a backend service. Read  Restrictions and Guidelines for more information. This method supports patch semantics.</p>
<p class="toc_element">
  <code><a href="#update">update(project, backendService, body)</a></code></p>
<p class="firstline">Updates the entire content of the BackendService resource. There are several restrictions and guidelines to keep in mind when updating a backend service. Read  Restrictions and Guidelines for more information.</p>
<h3>Method Details</h3>
<div class="method">
    <code class="details" id="delete">delete(project, backendService)</code>
  <pre>Deletes the specified BackendService resource.

Args:
  project: string, Project ID for 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] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] Reserved for future use.
    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
    "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
    "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
    "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
    "operationType": "A String", # [Output Only] The type of operation, such as insert, update, or delete, and so on.
    "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 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 status code that was returned. For example, a 404 means the resource was not found.
    "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
    "status": "A String", # [Output Only] The status of the operation, which can be one of the following: PENDING, RUNNING, or DONE.
    "description": "A String", # [Output Only] A textual description of the operation, which is set when the operation is created.
    "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
      {
        "message": "A String", # [Output Only] A human-readable description of the warning code.
        "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute Engine returns NO_RESULTS_ON_PAGE if there are no results in the response.
        "data": [ # [Output Only] Metadata about this warning in key: value format. For example:
            # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
          {
            "value": "A String", # [Output Only] A warning data value corresponding to the key.
            "key": "A 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).
          },
        ],
      },
    ],
    "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 value 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] The URL of the region where the operation resides. Only available when performing regional operations.
    "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 that caused the error. This property is optional.
        },
      ],
    },
    "endTime": "A String", # [Output Only] The time that this operation was completed. This value is in RFC3339 text format.
    "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies.
  }</pre>
</div>

<div class="method">
    <code class="details" id="get">get(project, backendService)</code>
  <pre>Returns the specified BackendService resource. Get a list of available backend services by making a list() request.

Args:
  project: string, Project ID for 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 and their serving capacity.
      "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
      "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
          #
          # Possible values are HTTP, HTTPS, HTTP2, TCP and SSL.
      "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
      "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
      "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services.
      "port": 42, # Deprecated in favor of portName. 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 description of this resource. Provide this property when you create the resource.
          "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 requests per second (RPS) that a single backend 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 requests per second (RPS) of the group. Can be used with either RATE or UTILIZATION balancing modes, 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. For global HTTP(S) load balancing, the default is UTILIZATION. Valid 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 instance groups referenced by this service. Required.
      "healthChecks": [ # The list of URLs to the HttpHealthCheck or HttpsHealthCheck 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] The unique identifier for the resource. This identifier is 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.
    }</pre>
</div>

<div class="method">
    <code class="details" id="getHealth">getHealth(project, backendService, body)</code>
  <pre>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.
      },
    ],
  }</pre>
</div>

<div class="method">
    <code class="details" id="insert">insert(project, body)</code>
  <pre>Creates a BackendService resource in the specified project using the data included in the request. There are several restrictions and guidelines to keep in mind when creating a backend service. Read  Restrictions and Guidelines for more information.

Args:
  project: string, Project ID for 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 and their serving capacity.
    "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
    "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
        # 
        # Possible values are HTTP, HTTPS, HTTP2, TCP and SSL.
    "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
    "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
    "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services.
    "port": 42, # Deprecated in favor of portName. 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 description of this resource. Provide this property when you create the resource.
        "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 requests per second (RPS) that a single backend 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 requests per second (RPS) of the group. Can be used with either RATE or UTILIZATION balancing modes, 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. For global HTTP(S) load balancing, the default is UTILIZATION. Valid 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 instance groups referenced by this service. Required.
    "healthChecks": [ # The list of URLs to the HttpHealthCheck or HttpsHealthCheck 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] The unique identifier for the resource. This identifier is 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] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] Reserved for future use.
    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
    "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
    "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
    "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
    "operationType": "A String", # [Output Only] The type of operation, such as insert, update, or delete, and so on.
    "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 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 status code that was returned. For example, a 404 means the resource was not found.
    "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
    "status": "A String", # [Output Only] The status of the operation, which can be one of the following: PENDING, RUNNING, or DONE.
    "description": "A String", # [Output Only] A textual description of the operation, which is set when the operation is created.
    "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
      {
        "message": "A String", # [Output Only] A human-readable description of the warning code.
        "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute Engine returns NO_RESULTS_ON_PAGE if there are no results in the response.
        "data": [ # [Output Only] Metadata about this warning in key: value format. For example:
            # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
          {
            "value": "A String", # [Output Only] A warning data value corresponding to the key.
            "key": "A 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).
          },
        ],
      },
    ],
    "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 value 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] The URL of the region where the operation resides. Only available when performing regional operations.
    "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 that caused the error. This property is optional.
        },
      ],
    },
    "endTime": "A String", # [Output Only] The time that this operation was completed. This value is in RFC3339 text format.
    "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies.
  }</pre>
</div>

<div class="method">
    <code class="details" id="list">list(project, maxResults=None, pageToken=None, filter=None)</code>
  <pre>Retrieves the list of BackendService resources available to the specified project.

Args:
  project: string, Project ID for this request. (required)
  maxResults: integer, The maximum number of results per page that should be returned. If the number of available results is larger than maxResults, Compute Engine returns a nextPageToken that can be used to get the next page of results in subsequent list requests.
  pageToken: string, Specifies a page token to use. Set pageToken to the nextPageToken returned by a previous list request to get the next page of results.
  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 you are filtering by (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, to filter for instances that do not have a name of example-instance, you would use filter=name ne example-instance.

Compute Engine Beta API Only: When filtering in the Beta API, you can also filter on nested fields. For example, you could filter on instances that have set the scheduling.automaticRestart field to true. Use filtering on nested fields to take advantage of labels to organize and search for results based on label values.

The Beta API also supports filtering on multiple expressions by providing each separate expression within parentheses. For example, (scheduling.automaticRestart eq true) (zone eq us-central1-f). Multiple expressions are treated as AND expressions, meaning that resources must match all expressions to pass the filters.

Returns:
  An object of the form:

    { # Contains a list of BackendService resources.
    "nextPageToken": "A String", # [Output Only] This token allows you to get the next page of results for list requests. If the number of results is larger than maxResults, use the nextPageToken as a value for the query parameter pageToken in the next list request. Subsequent list requests will have their own nextPageToken to continue paging through the results.
    "items": [ # A list of BackendService resources.
      { # A BackendService resource. This resource defines a group of backend virtual machines and their serving capacity.
          "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
          "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
              #
              # Possible values are HTTP, HTTPS, HTTP2, TCP and SSL.
          "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
          "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
          "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services.
          "port": 42, # Deprecated in favor of portName. 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 description of this resource. Provide this property when you create the resource.
              "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 requests per second (RPS) that a single backend 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 requests per second (RPS) of the group. Can be used with either RATE or UTILIZATION balancing modes, 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. For global HTTP(S) load balancing, the default is UTILIZATION. Valid 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 instance groups referenced by this service. Required.
          "healthChecks": [ # The list of URLs to the HttpHealthCheck or HttpsHealthCheck 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] The unique identifier for the resource. This identifier is 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] The unique identifier for the resource. This identifier is defined by the server.
    "selfLink": "A String", # [Output Only] Server-defined URL for this resource.
  }</pre>
</div>

<div class="method">
    <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
  <pre>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.
    </pre>
</div>

<div class="method">
    <code class="details" id="patch">patch(project, backendService, body)</code>
  <pre>Updates the entire content of the BackendService resource. There are several restrictions and guidelines to keep in mind when updating a backend service. Read  Restrictions and Guidelines for more information. This method supports patch semantics.

Args:
  project: string, Project ID for 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 and their serving capacity.
    "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
    "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
        # 
        # Possible values are HTTP, HTTPS, HTTP2, TCP and SSL.
    "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
    "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
    "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services.
    "port": 42, # Deprecated in favor of portName. 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 description of this resource. Provide this property when you create the resource.
        "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 requests per second (RPS) that a single backend 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 requests per second (RPS) of the group. Can be used with either RATE or UTILIZATION balancing modes, 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. For global HTTP(S) load balancing, the default is UTILIZATION. Valid 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 instance groups referenced by this service. Required.
    "healthChecks": [ # The list of URLs to the HttpHealthCheck or HttpsHealthCheck 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] The unique identifier for the resource. This identifier is 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] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] Reserved for future use.
    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
    "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
    "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
    "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
    "operationType": "A String", # [Output Only] The type of operation, such as insert, update, or delete, and so on.
    "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 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 status code that was returned. For example, a 404 means the resource was not found.
    "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
    "status": "A String", # [Output Only] The status of the operation, which can be one of the following: PENDING, RUNNING, or DONE.
    "description": "A String", # [Output Only] A textual description of the operation, which is set when the operation is created.
    "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
      {
        "message": "A String", # [Output Only] A human-readable description of the warning code.
        "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute Engine returns NO_RESULTS_ON_PAGE if there are no results in the response.
        "data": [ # [Output Only] Metadata about this warning in key: value format. For example:
            # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
          {
            "value": "A String", # [Output Only] A warning data value corresponding to the key.
            "key": "A 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).
          },
        ],
      },
    ],
    "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 value 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] The URL of the region where the operation resides. Only available when performing regional operations.
    "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 that caused the error. This property is optional.
        },
      ],
    },
    "endTime": "A String", # [Output Only] The time that this operation was completed. This value is in RFC3339 text format.
    "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies.
  }</pre>
</div>

<div class="method">
    <code class="details" id="update">update(project, backendService, body)</code>
  <pre>Updates the entire content of the BackendService resource. There are several restrictions and guidelines to keep in mind when updating a backend service. Read  Restrictions and Guidelines for more information.

Args:
  project: string, Project ID for 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 and their serving capacity.
    "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
    "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
        # 
        # Possible values are HTTP, HTTPS, HTTP2, TCP and SSL.
    "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
    "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
    "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services.
    "port": 42, # Deprecated in favor of portName. 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 description of this resource. Provide this property when you create the resource.
        "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 requests per second (RPS) that a single backend 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 requests per second (RPS) of the group. Can be used with either RATE or UTILIZATION balancing modes, 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. For global HTTP(S) load balancing, the default is UTILIZATION. Valid 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 instance groups referenced by this service. Required.
    "healthChecks": [ # The list of URLs to the HttpHealthCheck or HttpsHealthCheck 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] The unique identifier for the resource. This identifier is 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] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] Reserved for future use.
    "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
    "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is defined by the server.
    "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only available when performing per-zone operations.
    "insertTime": "A String", # [Output Only] The time that this operation was requested. This value is in RFC3339 text format.
    "operationType": "A String", # [Output Only] The type of operation, such as insert, update, or delete, and so on.
    "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 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 status code that was returned. For example, a 404 means the resource was not found.
    "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the operation.
    "status": "A String", # [Output Only] The status of the operation, which can be one of the following: PENDING, RUNNING, or DONE.
    "description": "A String", # [Output Only] A textual description of the operation, which is set when the operation is created.
    "warnings": [ # [Output Only] If warning messages are generated during processing of the operation, this field will be populated.
      {
        "message": "A String", # [Output Only] A human-readable description of the warning code.
        "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute Engine returns NO_RESULTS_ON_PAGE if there are no results in the response.
        "data": [ # [Output Only] Metadata about this warning in key: value format. For example:
            # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
          {
            "value": "A String", # [Output Only] A warning data value corresponding to the key.
            "key": "A 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).
          },
        ],
      },
    ],
    "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 value 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] The URL of the region where the operation resides. Only available when performing regional operations.
    "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 that caused the error. This property is optional.
        },
      ],
    },
    "endTime": "A String", # [Output Only] The time that this operation was completed. This value is in RFC3339 text format.
    "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
    "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies.
  }</pre>
</div>

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