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<h1><a href="compute_v1.html">Compute Engine API</a> . <a href="compute_v1.regionBackendServices.html">regionBackendServices</a></h1>
<h2>Instance Methods</h2>
<p class="toc_element">
  <code><a href="#delete">delete(project, region, backendService, requestId=None)</a></code></p>
<p class="firstline">Deletes the specified regional BackendService resource.</p>
<p class="toc_element">
  <code><a href="#get">get(project, region, backendService)</a></code></p>
<p class="firstline">Returns the specified regional BackendService resource.</p>
<p class="toc_element">
  <code><a href="#getHealth">getHealth(project, region, backendService, body)</a></code></p>
<p class="firstline">Gets the most recent health check results for this regional BackendService.</p>
<p class="toc_element">
  <code><a href="#insert">insert(project, region, body, requestId=None)</a></code></p>
<p class="firstline">Creates a regional 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 regional backend service. Read  Restrictions and Guidelines for more information.</p>
<p class="toc_element">
  <code><a href="#list">list(project, region, orderBy=None, maxResults=None, pageToken=None, filter=None)</a></code></p>
<p class="firstline">Retrieves the list of regional BackendService resources available to the specified project in the given region.</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, region, backendService, body, requestId=None)</a></code></p>
<p class="firstline">Updates the specified regional BackendService resource with the data included in the request. 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 and uses the JSON merge patch format and processing rules.</p>
<p class="toc_element">
  <code><a href="#update">update(project, region, backendService, body, requestId=None)</a></code></p>
<p class="firstline">Updates the specified regional BackendService resource with the data included in the request. 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, region, backendService, requestId=None)</code>
  <pre>Deletes the specified regional BackendService resource.

Args:
  project: string, Project ID for this request. (required)
  region: string, Name of the region scoping this request. (required)
  backendService: string, Name of the BackendService resource to delete. (required)
  requestId: string, An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed.

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

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

Returns:
  An object of the form:

    { # Represents an Operation resource.
      #
      # You can use an operation resource to manage asynchronous API requests. For more information, read Handling API responses.
      #
      # Operations can be global, regional or zonal.
      # - For global operations, use the globalOperations resource.
      # - For regional operations, use the regionOperations resource.
      # - For zonal operations, use the zonalOperations resource.
      #
      # For more information, read  Global, Regional, and Zonal Resources. (== resource_for v1.globalOperations ==) (== resource_for beta.globalOperations ==) (== resource_for v1.regionOperations ==) (== resource_for beta.regionOperations ==) (== resource_for v1.zoneOperations ==) (== resource_for beta.zoneOperations ==)
    "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request. Not present otherwise.
    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
    "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 applicable 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 applicable 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. For operations related to creating a snapshot, this points to the persistent disk that the snapshot was created from.
  }</pre>
</div>

<div class="method">
    <code class="details" id="get">get(project, region, backendService)</code>
  <pre>Returns the specified regional BackendService resource.

Args:
  project: string, Project ID for this request. (required)
  region: string, Name of the region 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 and their serving capacity. (== resource_for v1.backendService ==) (== resource_for beta.backendService ==)
      "connectionDraining": { # Message containing connection draining configuration.
        "drainingTimeoutSec": 42, # Time for which instance will be drained (not accept new connections, but still work to finish started).
      },
      "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
          #
          # Possible values are HTTP, HTTPS, TCP, and SSL. The default is HTTP.
          #
          # For internal load balancing, the possible values are TCP and UDP, and the default is TCP.
      "loadBalancingScheme": "A String", # Indicates whether the backend service will be used with internal or external load balancing. A backend service created for one type of load balancing cannot be used with the other. Possible values are INTERNAL and EXTERNAL.
      "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 for Compute Engine backend services. A health check must not be specified for App Engine backend and Cloud Function backend.
          #
          # For internal load balancing, a URL to a HealthCheck resource must be specified instead.
        "A String",
      ],
      "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
          #
          # When the load balancing scheme is EXTERNAL, can be NONE, CLIENT_IP, or GENERATED_COOKIE.
          #
          # When the load balancing scheme is INTERNAL, can be NONE, CLIENT_IP, CLIENT_IP_PROTO, or CLIENT_IP_PORT_PROTO.
          #
          # When the protocol is UDP, this field is not used.
      "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.
      "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService.
        "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
          "A String",
        ],
        "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be considered fresh. After this time period, the response will be revalidated before being served. Defaults to 1hr (3600s). When serving responses to signed URL requests, Cloud CDN will internally behave as though all responses from this backend had a "Cache-Control: public, max-age=[TTL]" header, regardless of any existing Cache-Control header. The actual headers served in responses will not be altered.
        "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud CDN. # The CacheKeyPolicy for this CdnPolicy.
          "includeQueryString": True or False, # If true, include query string parameters in the cache key according to query_string_whitelist and query_string_blacklist. If neither is set, the entire query string will be included. If false, the query string will be excluded from the cache key entirely.
          "includeHost": True or False, # If true, requests to different hosts will be cached separately.
          "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other parameters will be included. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
            "A String",
          ],
          "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other parameters will be excluded. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
            "A String",
          ],
          "includeProtocol": True or False, # If true, http and https requests will be cached separately.
        },
      },
      "enableCDN": True or False, # If true, enable Cloud CDN for this BackendService.
          #
          # When the load balancing scheme is INTERNAL, this field is not used.
      "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds if session_affinity is GENERATED_COOKIE. If set to 0, the cookie is non-persistent and lasts only until the end of the browser session (or equivalent). The maximum allowed value for TTL is one day.
          #
          # When the load balancing scheme is INTERNAL, this field is not used.
      "port": 42, # Deprecated in favor of portName. The TCP port to connect on the backend. The default value is 80.
          #
          # This cannot be used for internal load balancing.
      "backends": [ # The list of backends that serve this BackendService.
        { # Message containing information of one individual backend.
          "group": "A String", # The fully-qualified URL of an Instance Group or Network Endpoint Group resource. In case of instance group this 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.
              #
              # For Network Endpoint Groups this defines list of endpoints. All endpoints of Network Endpoint Group must be hosted on instances located in the same zone as the Network Endpoint Group.
              #
              # Backend service can not contain mix of Instance Group and Network Endpoint Group backends.
              #
              # Note that you must specify an Instance Group or Network Endpoint Group resource using the fully-qualified URL, rather than a partial URL.
              #
              # When the BackendService has load balancing scheme INTERNAL, the instance group must be within the same region as the BackendService. Network Endpoint Groups are not supported for INTERNAL load balancing scheme.
          "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].
              #
              # This cannot be used for internal load balancing.
          "maxConnectionsPerEndpoint": 42, # The max number of simultaneous connections that a single backend network endpoint can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerEndpoint must be set.
              #
              # This cannot be used for internal load balancing.
          "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.
              #
              # This cannot be used for internal load balancing.
          "maxConnectionsPerInstance": 42, # The max number of simultaneous connections that a single backend instance can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
              #
              # This cannot be used for internal load balancing.
          "maxRatePerEndpoint": 3.14, # The max requests per second (RPS) that a single backend network endpoint 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 maxRatePerEndpoint must be set.
              #
              # This cannot be used for internal load balancing.
          "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (based on UTILIZATION, RATE or CONNECTION). Default value is 1, which means the group will serve up to 100% of its configured capacity (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available Capacity. Valid range is [0.0,1.0].
              #
              # This cannot be used for internal load balancing.
          "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.
              #
              # This cannot be used for internal load balancing.
          "maxConnections": 42, # The max number of simultaneous connections for the group. Can be used with either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
              #
              # This cannot be used for internal load balancing.
          "balancingMode": "A String", # Specifies the balancing mode for this backend. For global HTTP(S) or TCP/SSL load balancing, the default is UTILIZATION. Valid values are UTILIZATION, RATE (for HTTP(S)) and CONNECTION (for TCP/SSL).
              #
              # For Internal Load Balancing, the default and only supported mode is CONNECTION.
        },
      ],
      "iap": { # Identity-Aware Proxy
        "oauth2ClientId": "A String",
        "enabled": True or False,
        "oauth2ClientSecret": "A String",
        "oauth2ClientSecretSha256": "A String", # [Output Only] SHA256 hash value for the field oauth2_client_secret above.
      },
      "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
      "customRequestHeaders": [ # Headers that the HTTP/S load balancer should add to proxied requests.
        "A String",
      ],
      "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this backend service.
      "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, otherwise the request will fail with error 412 conditionNotMet.
          #
          # To see the latest fingerprint, make a get() request to retrieve a BackendService.
      "portName": "A String", # Name of backend port. The same name should appear in the instance groups referenced by this service. Required when the load balancing scheme is EXTERNAL.
          #
          # When the load balancing scheme is INTERNAL, this field is not used.
      "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
      "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.
      "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
      "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
    }</pre>
</div>

<div class="method">
    <code class="details" id="getHealth">getHealth(project, region, backendService, body)</code>
  <pre>Gets the most recent health check results for this regional BackendService.

Args:
  project: string, A parameter (required)
  region: string, Name of the region scoping this request. (required)
  backendService: string, Name of the BackendService resource for which to get health. (required)
  body: object, The request body. (required)
    The object takes the form of:

{
    "group": "A String", # A URI referencing one of the instance groups or network endpoint groups 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": [ # Health state of the backend instances or endpoints in requested instance or network endpoint group, determined based on configured health checks.
      {
        "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, region, body, requestId=None)</code>
  <pre>Creates a regional 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 regional backend service. Read  Restrictions and Guidelines for more information.

Args:
  project: string, Project ID for this request. (required)
  region: string, Name of the region 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 and their serving capacity. (== resource_for v1.backendService ==) (== resource_for beta.backendService ==)
    "connectionDraining": { # Message containing connection draining configuration.
      "drainingTimeoutSec": 42, # Time for which instance will be drained (not accept new connections, but still work to finish started).
    },
    "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
        # 
        # Possible values are HTTP, HTTPS, TCP, and SSL. The default is HTTP.
        # 
        # For internal load balancing, the possible values are TCP and UDP, and the default is TCP.
    "loadBalancingScheme": "A String", # Indicates whether the backend service will be used with internal or external load balancing. A backend service created for one type of load balancing cannot be used with the other. Possible values are INTERNAL and EXTERNAL.
    "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 for Compute Engine backend services. A health check must not be specified for App Engine backend and Cloud Function backend.
        # 
        # For internal load balancing, a URL to a HealthCheck resource must be specified instead.
      "A String",
    ],
    "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
        # 
        # When the load balancing scheme is EXTERNAL, can be NONE, CLIENT_IP, or GENERATED_COOKIE.
        # 
        # When the load balancing scheme is INTERNAL, can be NONE, CLIENT_IP, CLIENT_IP_PROTO, or CLIENT_IP_PORT_PROTO.
        # 
        # When the protocol is UDP, this field is not used.
    "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.
    "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService.
      "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
        "A String",
      ],
      "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be considered fresh. After this time period, the response will be revalidated before being served. Defaults to 1hr (3600s). When serving responses to signed URL requests, Cloud CDN will internally behave as though all responses from this backend had a "Cache-Control: public, max-age=[TTL]" header, regardless of any existing Cache-Control header. The actual headers served in responses will not be altered.
      "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud CDN. # The CacheKeyPolicy for this CdnPolicy.
        "includeQueryString": True or False, # If true, include query string parameters in the cache key according to query_string_whitelist and query_string_blacklist. If neither is set, the entire query string will be included. If false, the query string will be excluded from the cache key entirely.
        "includeHost": True or False, # If true, requests to different hosts will be cached separately.
        "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other parameters will be included. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
          "A String",
        ],
        "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other parameters will be excluded. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
          "A String",
        ],
        "includeProtocol": True or False, # If true, http and https requests will be cached separately.
      },
    },
    "enableCDN": True or False, # If true, enable Cloud CDN for this BackendService.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds if session_affinity is GENERATED_COOKIE. If set to 0, the cookie is non-persistent and lasts only until the end of the browser session (or equivalent). The maximum allowed value for TTL is one day.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "port": 42, # Deprecated in favor of portName. The TCP port to connect on the backend. The default value is 80.
        # 
        # This cannot be used for internal load balancing.
    "backends": [ # The list of backends that serve this BackendService.
      { # Message containing information of one individual backend.
        "group": "A String", # The fully-qualified URL of an Instance Group or Network Endpoint Group resource. In case of instance group this 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.
            #
            # For Network Endpoint Groups this defines list of endpoints. All endpoints of Network Endpoint Group must be hosted on instances located in the same zone as the Network Endpoint Group.
            #
            # Backend service can not contain mix of Instance Group and Network Endpoint Group backends.
            #
            # Note that you must specify an Instance Group or Network Endpoint Group resource using the fully-qualified URL, rather than a partial URL.
            #
            # When the BackendService has load balancing scheme INTERNAL, the instance group must be within the same region as the BackendService. Network Endpoint Groups are not supported for INTERNAL load balancing scheme.
        "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].
            #
            # This cannot be used for internal load balancing.
        "maxConnectionsPerEndpoint": 42, # The max number of simultaneous connections that a single backend network endpoint can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerEndpoint must be set.
            #
            # This cannot be used for internal load balancing.
        "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.
            #
            # This cannot be used for internal load balancing.
        "maxConnectionsPerInstance": 42, # The max number of simultaneous connections that a single backend instance can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
            #
            # This cannot be used for internal load balancing.
        "maxRatePerEndpoint": 3.14, # The max requests per second (RPS) that a single backend network endpoint 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 maxRatePerEndpoint must be set.
            #
            # This cannot be used for internal load balancing.
        "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (based on UTILIZATION, RATE or CONNECTION). Default value is 1, which means the group will serve up to 100% of its configured capacity (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available Capacity. Valid range is [0.0,1.0].
            #
            # This cannot be used for internal load balancing.
        "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.
            #
            # This cannot be used for internal load balancing.
        "maxConnections": 42, # The max number of simultaneous connections for the group. Can be used with either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
            #
            # This cannot be used for internal load balancing.
        "balancingMode": "A String", # Specifies the balancing mode for this backend. For global HTTP(S) or TCP/SSL load balancing, the default is UTILIZATION. Valid values are UTILIZATION, RATE (for HTTP(S)) and CONNECTION (for TCP/SSL).
            #
            # For Internal Load Balancing, the default and only supported mode is CONNECTION.
      },
    ],
    "iap": { # Identity-Aware Proxy
      "oauth2ClientId": "A String",
      "enabled": True or False,
      "oauth2ClientSecret": "A String",
      "oauth2ClientSecretSha256": "A String", # [Output Only] SHA256 hash value for the field oauth2_client_secret above.
    },
    "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
    "customRequestHeaders": [ # Headers that the HTTP/S load balancer should add to proxied requests.
      "A String",
    ],
    "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this backend service.
    "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, otherwise the request will fail with error 412 conditionNotMet.
        # 
        # To see the latest fingerprint, make a get() request to retrieve a BackendService.
    "portName": "A String", # Name of backend port. The same name should appear in the instance groups referenced by this service. Required when the load balancing scheme is EXTERNAL.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
    "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.
    "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
    "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
    "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
  }

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

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

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

Returns:
  An object of the form:

    { # Represents an Operation resource.
      #
      # You can use an operation resource to manage asynchronous API requests. For more information, read Handling API responses.
      #
      # Operations can be global, regional or zonal.
      # - For global operations, use the globalOperations resource.
      # - For regional operations, use the regionOperations resource.
      # - For zonal operations, use the zonalOperations resource.
      #
      # For more information, read  Global, Regional, and Zonal Resources. (== resource_for v1.globalOperations ==) (== resource_for beta.globalOperations ==) (== resource_for v1.regionOperations ==) (== resource_for beta.regionOperations ==) (== resource_for v1.zoneOperations ==) (== resource_for beta.zoneOperations ==)
    "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request. Not present otherwise.
    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
    "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 applicable 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 applicable 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. For operations related to creating a snapshot, this points to the persistent disk that the snapshot was created from.
  }</pre>
</div>

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

Args:
  project: string, Project ID for this request. (required)
  region: string, Name of the region scoping this request. (required)
  orderBy: string, Sorts list results by a certain order. By default, results are returned in alphanumerical order based on the resource name.

You can also sort results in descending order based on the creation timestamp using orderBy="creationTimestamp desc". This sorts results based on the creationTimestamp field in reverse chronological order (newest result first). Use this to sort resources like operations so that the newest operation is returned first.

Currently, only sorting by name or creationTimestamp desc is supported.
  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. Acceptable values are 0 to 500, inclusive. (Default: 500)
  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, A filter expression that filters resources listed in the response. The expression must specify the field name, a comparison operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The comparison operator must be either =, !=, >, or <.

For example, if you are filtering Compute Engine instances, you can exclude instances named example-instance by specifying name != example-instance.

You can also filter nested fields. For example, you could specify scheduling.automaticRestart = false to include instances only if they are not scheduled for automatic restarts. You can use filtering on nested fields to filter based on resource labels.

To filter on multiple expressions, provide each separate expression within parentheses. For example, (scheduling.automaticRestart = true) (cpuPlatform = "Intel Skylake"). By default, each expression is an AND expression. However, you can include AND and OR expressions explicitly. For example, (cpuPlatform = "Intel Skylake") OR (cpuPlatform = "Intel Broadwell") AND (scheduling.automaticRestart = true).

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.
    "kind": "compute#backendServiceList", # [Output Only] Type of resource. Always compute#backendServiceList for lists of backend services.
    "items": [ # A list of BackendService resources.
      { # A BackendService resource. This resource defines a group of backend virtual machines and their serving capacity. (== resource_for v1.backendService ==) (== resource_for beta.backendService ==)
          "connectionDraining": { # Message containing connection draining configuration.
            "drainingTimeoutSec": 42, # Time for which instance will be drained (not accept new connections, but still work to finish started).
          },
          "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
              #
              # Possible values are HTTP, HTTPS, TCP, and SSL. The default is HTTP.
              #
              # For internal load balancing, the possible values are TCP and UDP, and the default is TCP.
          "loadBalancingScheme": "A String", # Indicates whether the backend service will be used with internal or external load balancing. A backend service created for one type of load balancing cannot be used with the other. Possible values are INTERNAL and EXTERNAL.
          "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 for Compute Engine backend services. A health check must not be specified for App Engine backend and Cloud Function backend.
              #
              # For internal load balancing, a URL to a HealthCheck resource must be specified instead.
            "A String",
          ],
          "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
              #
              # When the load balancing scheme is EXTERNAL, can be NONE, CLIENT_IP, or GENERATED_COOKIE.
              #
              # When the load balancing scheme is INTERNAL, can be NONE, CLIENT_IP, CLIENT_IP_PROTO, or CLIENT_IP_PORT_PROTO.
              #
              # When the protocol is UDP, this field is not used.
          "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.
          "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService.
            "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
              "A String",
            ],
            "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be considered fresh. After this time period, the response will be revalidated before being served. Defaults to 1hr (3600s). When serving responses to signed URL requests, Cloud CDN will internally behave as though all responses from this backend had a "Cache-Control: public, max-age=[TTL]" header, regardless of any existing Cache-Control header. The actual headers served in responses will not be altered.
            "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud CDN. # The CacheKeyPolicy for this CdnPolicy.
              "includeQueryString": True or False, # If true, include query string parameters in the cache key according to query_string_whitelist and query_string_blacklist. If neither is set, the entire query string will be included. If false, the query string will be excluded from the cache key entirely.
              "includeHost": True or False, # If true, requests to different hosts will be cached separately.
              "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other parameters will be included. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
                "A String",
              ],
              "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other parameters will be excluded. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
                "A String",
              ],
              "includeProtocol": True or False, # If true, http and https requests will be cached separately.
            },
          },
          "enableCDN": True or False, # If true, enable Cloud CDN for this BackendService.
              #
              # When the load balancing scheme is INTERNAL, this field is not used.
          "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds if session_affinity is GENERATED_COOKIE. If set to 0, the cookie is non-persistent and lasts only until the end of the browser session (or equivalent). The maximum allowed value for TTL is one day.
              #
              # When the load balancing scheme is INTERNAL, this field is not used.
          "port": 42, # Deprecated in favor of portName. The TCP port to connect on the backend. The default value is 80.
              #
              # This cannot be used for internal load balancing.
          "backends": [ # The list of backends that serve this BackendService.
            { # Message containing information of one individual backend.
              "group": "A String", # The fully-qualified URL of an Instance Group or Network Endpoint Group resource. In case of instance group this 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.
                  #
                  # For Network Endpoint Groups this defines list of endpoints. All endpoints of Network Endpoint Group must be hosted on instances located in the same zone as the Network Endpoint Group.
                  #
                  # Backend service can not contain mix of Instance Group and Network Endpoint Group backends.
                  #
                  # Note that you must specify an Instance Group or Network Endpoint Group resource using the fully-qualified URL, rather than a partial URL.
                  #
                  # When the BackendService has load balancing scheme INTERNAL, the instance group must be within the same region as the BackendService. Network Endpoint Groups are not supported for INTERNAL load balancing scheme.
              "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].
                  #
                  # This cannot be used for internal load balancing.
              "maxConnectionsPerEndpoint": 42, # The max number of simultaneous connections that a single backend network endpoint can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerEndpoint must be set.
                  #
                  # This cannot be used for internal load balancing.
              "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.
                  #
                  # This cannot be used for internal load balancing.
              "maxConnectionsPerInstance": 42, # The max number of simultaneous connections that a single backend instance can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
                  #
                  # This cannot be used for internal load balancing.
              "maxRatePerEndpoint": 3.14, # The max requests per second (RPS) that a single backend network endpoint 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 maxRatePerEndpoint must be set.
                  #
                  # This cannot be used for internal load balancing.
              "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (based on UTILIZATION, RATE or CONNECTION). Default value is 1, which means the group will serve up to 100% of its configured capacity (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available Capacity. Valid range is [0.0,1.0].
                  #
                  # This cannot be used for internal load balancing.
              "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.
                  #
                  # This cannot be used for internal load balancing.
              "maxConnections": 42, # The max number of simultaneous connections for the group. Can be used with either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
                  #
                  # This cannot be used for internal load balancing.
              "balancingMode": "A String", # Specifies the balancing mode for this backend. For global HTTP(S) or TCP/SSL load balancing, the default is UTILIZATION. Valid values are UTILIZATION, RATE (for HTTP(S)) and CONNECTION (for TCP/SSL).
                  #
                  # For Internal Load Balancing, the default and only supported mode is CONNECTION.
            },
          ],
          "iap": { # Identity-Aware Proxy
            "oauth2ClientId": "A String",
            "enabled": True or False,
            "oauth2ClientSecret": "A String",
            "oauth2ClientSecretSha256": "A String", # [Output Only] SHA256 hash value for the field oauth2_client_secret above.
          },
          "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
          "customRequestHeaders": [ # Headers that the HTTP/S load balancer should add to proxied requests.
            "A String",
          ],
          "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this backend service.
          "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, otherwise the request will fail with error 412 conditionNotMet.
              #
              # To see the latest fingerprint, make a get() request to retrieve a BackendService.
          "portName": "A String", # Name of backend port. The same name should appear in the instance groups referenced by this service. Required when the load balancing scheme is EXTERNAL.
              #
              # When the load balancing scheme is INTERNAL, this field is not used.
          "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
          "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.
          "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
          "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
          "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
        },
    ],
    "warning": { # [Output Only] Informational warning message.
      "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).
        },
      ],
    },
    "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.
  }</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, region, backendService, body, requestId=None)</code>
  <pre>Updates the specified regional BackendService resource with the data included in the request. 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 and uses the JSON merge patch format and processing rules.

Args:
  project: string, Project ID for this request. (required)
  region: string, Name of the region scoping this request. (required)
  backendService: string, Name of the BackendService resource to patch. (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. (== resource_for v1.backendService ==) (== resource_for beta.backendService ==)
    "connectionDraining": { # Message containing connection draining configuration.
      "drainingTimeoutSec": 42, # Time for which instance will be drained (not accept new connections, but still work to finish started).
    },
    "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
        # 
        # Possible values are HTTP, HTTPS, TCP, and SSL. The default is HTTP.
        # 
        # For internal load balancing, the possible values are TCP and UDP, and the default is TCP.
    "loadBalancingScheme": "A String", # Indicates whether the backend service will be used with internal or external load balancing. A backend service created for one type of load balancing cannot be used with the other. Possible values are INTERNAL and EXTERNAL.
    "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 for Compute Engine backend services. A health check must not be specified for App Engine backend and Cloud Function backend.
        # 
        # For internal load balancing, a URL to a HealthCheck resource must be specified instead.
      "A String",
    ],
    "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
        # 
        # When the load balancing scheme is EXTERNAL, can be NONE, CLIENT_IP, or GENERATED_COOKIE.
        # 
        # When the load balancing scheme is INTERNAL, can be NONE, CLIENT_IP, CLIENT_IP_PROTO, or CLIENT_IP_PORT_PROTO.
        # 
        # When the protocol is UDP, this field is not used.
    "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.
    "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService.
      "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
        "A String",
      ],
      "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be considered fresh. After this time period, the response will be revalidated before being served. Defaults to 1hr (3600s). When serving responses to signed URL requests, Cloud CDN will internally behave as though all responses from this backend had a "Cache-Control: public, max-age=[TTL]" header, regardless of any existing Cache-Control header. The actual headers served in responses will not be altered.
      "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud CDN. # The CacheKeyPolicy for this CdnPolicy.
        "includeQueryString": True or False, # If true, include query string parameters in the cache key according to query_string_whitelist and query_string_blacklist. If neither is set, the entire query string will be included. If false, the query string will be excluded from the cache key entirely.
        "includeHost": True or False, # If true, requests to different hosts will be cached separately.
        "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other parameters will be included. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
          "A String",
        ],
        "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other parameters will be excluded. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
          "A String",
        ],
        "includeProtocol": True or False, # If true, http and https requests will be cached separately.
      },
    },
    "enableCDN": True or False, # If true, enable Cloud CDN for this BackendService.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds if session_affinity is GENERATED_COOKIE. If set to 0, the cookie is non-persistent and lasts only until the end of the browser session (or equivalent). The maximum allowed value for TTL is one day.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "port": 42, # Deprecated in favor of portName. The TCP port to connect on the backend. The default value is 80.
        # 
        # This cannot be used for internal load balancing.
    "backends": [ # The list of backends that serve this BackendService.
      { # Message containing information of one individual backend.
        "group": "A String", # The fully-qualified URL of an Instance Group or Network Endpoint Group resource. In case of instance group this 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.
            #
            # For Network Endpoint Groups this defines list of endpoints. All endpoints of Network Endpoint Group must be hosted on instances located in the same zone as the Network Endpoint Group.
            #
            # Backend service can not contain mix of Instance Group and Network Endpoint Group backends.
            #
            # Note that you must specify an Instance Group or Network Endpoint Group resource using the fully-qualified URL, rather than a partial URL.
            #
            # When the BackendService has load balancing scheme INTERNAL, the instance group must be within the same region as the BackendService. Network Endpoint Groups are not supported for INTERNAL load balancing scheme.
        "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].
            #
            # This cannot be used for internal load balancing.
        "maxConnectionsPerEndpoint": 42, # The max number of simultaneous connections that a single backend network endpoint can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerEndpoint must be set.
            #
            # This cannot be used for internal load balancing.
        "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.
            #
            # This cannot be used for internal load balancing.
        "maxConnectionsPerInstance": 42, # The max number of simultaneous connections that a single backend instance can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
            #
            # This cannot be used for internal load balancing.
        "maxRatePerEndpoint": 3.14, # The max requests per second (RPS) that a single backend network endpoint 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 maxRatePerEndpoint must be set.
            #
            # This cannot be used for internal load balancing.
        "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (based on UTILIZATION, RATE or CONNECTION). Default value is 1, which means the group will serve up to 100% of its configured capacity (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available Capacity. Valid range is [0.0,1.0].
            #
            # This cannot be used for internal load balancing.
        "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.
            #
            # This cannot be used for internal load balancing.
        "maxConnections": 42, # The max number of simultaneous connections for the group. Can be used with either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
            #
            # This cannot be used for internal load balancing.
        "balancingMode": "A String", # Specifies the balancing mode for this backend. For global HTTP(S) or TCP/SSL load balancing, the default is UTILIZATION. Valid values are UTILIZATION, RATE (for HTTP(S)) and CONNECTION (for TCP/SSL).
            #
            # For Internal Load Balancing, the default and only supported mode is CONNECTION.
      },
    ],
    "iap": { # Identity-Aware Proxy
      "oauth2ClientId": "A String",
      "enabled": True or False,
      "oauth2ClientSecret": "A String",
      "oauth2ClientSecretSha256": "A String", # [Output Only] SHA256 hash value for the field oauth2_client_secret above.
    },
    "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
    "customRequestHeaders": [ # Headers that the HTTP/S load balancer should add to proxied requests.
      "A String",
    ],
    "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this backend service.
    "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, otherwise the request will fail with error 412 conditionNotMet.
        # 
        # To see the latest fingerprint, make a get() request to retrieve a BackendService.
    "portName": "A String", # Name of backend port. The same name should appear in the instance groups referenced by this service. Required when the load balancing scheme is EXTERNAL.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
    "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.
    "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
    "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
    "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
  }

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

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

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

Returns:
  An object of the form:

    { # Represents an Operation resource.
      #
      # You can use an operation resource to manage asynchronous API requests. For more information, read Handling API responses.
      #
      # Operations can be global, regional or zonal.
      # - For global operations, use the globalOperations resource.
      # - For regional operations, use the regionOperations resource.
      # - For zonal operations, use the zonalOperations resource.
      #
      # For more information, read  Global, Regional, and Zonal Resources. (== resource_for v1.globalOperations ==) (== resource_for beta.globalOperations ==) (== resource_for v1.regionOperations ==) (== resource_for beta.regionOperations ==) (== resource_for v1.zoneOperations ==) (== resource_for beta.zoneOperations ==)
    "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request. Not present otherwise.
    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
    "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 applicable 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 applicable 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. For operations related to creating a snapshot, this points to the persistent disk that the snapshot was created from.
  }</pre>
</div>

<div class="method">
    <code class="details" id="update">update(project, region, backendService, body, requestId=None)</code>
  <pre>Updates the specified regional BackendService resource with the data included in the request. 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)
  region: string, Name of the region 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 and their serving capacity. (== resource_for v1.backendService ==) (== resource_for beta.backendService ==)
    "connectionDraining": { # Message containing connection draining configuration.
      "drainingTimeoutSec": 42, # Time for which instance will be drained (not accept new connections, but still work to finish started).
    },
    "protocol": "A String", # The protocol this BackendService uses to communicate with backends.
        # 
        # Possible values are HTTP, HTTPS, TCP, and SSL. The default is HTTP.
        # 
        # For internal load balancing, the possible values are TCP and UDP, and the default is TCP.
    "loadBalancingScheme": "A String", # Indicates whether the backend service will be used with internal or external load balancing. A backend service created for one type of load balancing cannot be used with the other. Possible values are INTERNAL and EXTERNAL.
    "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 for Compute Engine backend services. A health check must not be specified for App Engine backend and Cloud Function backend.
        # 
        # For internal load balancing, a URL to a HealthCheck resource must be specified instead.
      "A String",
    ],
    "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
        # 
        # When the load balancing scheme is EXTERNAL, can be NONE, CLIENT_IP, or GENERATED_COOKIE.
        # 
        # When the load balancing scheme is INTERNAL, can be NONE, CLIENT_IP, CLIENT_IP_PROTO, or CLIENT_IP_PORT_PROTO.
        # 
        # When the protocol is UDP, this field is not used.
    "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.
    "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService.
      "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
        "A String",
      ],
      "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be considered fresh. After this time period, the response will be revalidated before being served. Defaults to 1hr (3600s). When serving responses to signed URL requests, Cloud CDN will internally behave as though all responses from this backend had a "Cache-Control: public, max-age=[TTL]" header, regardless of any existing Cache-Control header. The actual headers served in responses will not be altered.
      "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud CDN. # The CacheKeyPolicy for this CdnPolicy.
        "includeQueryString": True or False, # If true, include query string parameters in the cache key according to query_string_whitelist and query_string_blacklist. If neither is set, the entire query string will be included. If false, the query string will be excluded from the cache key entirely.
        "includeHost": True or False, # If true, requests to different hosts will be cached separately.
        "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other parameters will be included. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
          "A String",
        ],
        "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other parameters will be excluded. Either specify query_string_whitelist or query_string_blacklist, not both. '&' and '=' will be percent encoded and not treated as delimiters.
          "A String",
        ],
        "includeProtocol": True or False, # If true, http and https requests will be cached separately.
      },
    },
    "enableCDN": True or False, # If true, enable Cloud CDN for this BackendService.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds if session_affinity is GENERATED_COOKIE. If set to 0, the cookie is non-persistent and lasts only until the end of the browser session (or equivalent). The maximum allowed value for TTL is one day.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "port": 42, # Deprecated in favor of portName. The TCP port to connect on the backend. The default value is 80.
        # 
        # This cannot be used for internal load balancing.
    "backends": [ # The list of backends that serve this BackendService.
      { # Message containing information of one individual backend.
        "group": "A String", # The fully-qualified URL of an Instance Group or Network Endpoint Group resource. In case of instance group this 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.
            #
            # For Network Endpoint Groups this defines list of endpoints. All endpoints of Network Endpoint Group must be hosted on instances located in the same zone as the Network Endpoint Group.
            #
            # Backend service can not contain mix of Instance Group and Network Endpoint Group backends.
            #
            # Note that you must specify an Instance Group or Network Endpoint Group resource using the fully-qualified URL, rather than a partial URL.
            #
            # When the BackendService has load balancing scheme INTERNAL, the instance group must be within the same region as the BackendService. Network Endpoint Groups are not supported for INTERNAL load balancing scheme.
        "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].
            #
            # This cannot be used for internal load balancing.
        "maxConnectionsPerEndpoint": 42, # The max number of simultaneous connections that a single backend network endpoint can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerEndpoint must be set.
            #
            # This cannot be used for internal load balancing.
        "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.
            #
            # This cannot be used for internal load balancing.
        "maxConnectionsPerInstance": 42, # The max number of simultaneous connections that a single backend instance can handle. This is used to calculate the capacity of the group. Can be used in either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
            #
            # This cannot be used for internal load balancing.
        "maxRatePerEndpoint": 3.14, # The max requests per second (RPS) that a single backend network endpoint 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 maxRatePerEndpoint must be set.
            #
            # This cannot be used for internal load balancing.
        "capacityScaler": 3.14, # A multiplier applied to the group's maximum servicing capacity (based on UTILIZATION, RATE or CONNECTION). Default value is 1, which means the group will serve up to 100% of its configured capacity (depending on balancingMode). A setting of 0 means the group is completely drained, offering 0% of its available Capacity. Valid range is [0.0,1.0].
            #
            # This cannot be used for internal load balancing.
        "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.
            #
            # This cannot be used for internal load balancing.
        "maxConnections": 42, # The max number of simultaneous connections for the group. Can be used with either CONNECTION or UTILIZATION balancing modes. For CONNECTION mode, either maxConnections or maxConnectionsPerInstance must be set.
            #
            # This cannot be used for internal load balancing.
        "balancingMode": "A String", # Specifies the balancing mode for this backend. For global HTTP(S) or TCP/SSL load balancing, the default is UTILIZATION. Valid values are UTILIZATION, RATE (for HTTP(S)) and CONNECTION (for TCP/SSL).
            #
            # For Internal Load Balancing, the default and only supported mode is CONNECTION.
      },
    ],
    "iap": { # Identity-Aware Proxy
      "oauth2ClientId": "A String",
      "enabled": True or False,
      "oauth2ClientSecret": "A String",
      "oauth2ClientSecretSha256": "A String", # [Output Only] SHA256 hash value for the field oauth2_client_secret above.
    },
    "description": "A String", # An optional description of this resource. Provide this property when you create the resource.
    "customRequestHeaders": [ # Headers that the HTTP/S load balancer should add to proxied requests.
      "A String",
    ],
    "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this backend service.
    "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, otherwise the request will fail with error 412 conditionNotMet.
        # 
        # To see the latest fingerprint, make a get() request to retrieve a BackendService.
    "portName": "A String", # Name of backend port. The same name should appear in the instance groups referenced by this service. Required when the load balancing scheme is EXTERNAL.
        # 
        # When the load balancing scheme is INTERNAL, this field is not used.
    "kind": "compute#backendService", # [Output Only] Type of resource. Always compute#backendService for backend services.
    "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.
    "region": "A String", # [Output Only] URL of the region where the regional backend service resides. This field is not applicable to global backend services. You must specify this field as part of the HTTP request URL. It is not settable as a field in the request body.
    "timeoutSec": 42, # How many seconds to wait for the backend before considering it a failed request. Default is 30 seconds.
    "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
  }

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

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

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

Returns:
  An object of the form:

    { # Represents an Operation resource.
      #
      # You can use an operation resource to manage asynchronous API requests. For more information, read Handling API responses.
      #
      # Operations can be global, regional or zonal.
      # - For global operations, use the globalOperations resource.
      # - For regional operations, use the regionOperations resource.
      # - For zonal operations, use the zonalOperations resource.
      #
      # For more information, read  Global, Regional, and Zonal Resources. (== resource_for v1.globalOperations ==) (== resource_for beta.globalOperations ==) (== resource_for v1.regionOperations ==) (== resource_for beta.regionOperations ==) (== resource_for v1.zoneOperations ==) (== resource_for beta.zoneOperations ==)
    "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation of the target resource.
    "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request. Not present otherwise.
    "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
    "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 applicable 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 applicable 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. For operations related to creating a snapshot, this points to the persistent disk that the snapshot was created from.
  }</pre>
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