listReferrers method

Future<InstanceListReferrers> listReferrers(String project, String zone, String instance, { String? filter, int? maxResults, String? orderBy, String? pageToken, bool? returnPartialSuccess, String? $fields, })

Retrieves a list of resources that refer to the VM instance specified in the request.

For example, if the VM instance is part of a managed or unmanaged instance group, the referrers list includes the instance group. For more information, read Viewing referrers to VM instances.

Request parameters:

project - Project ID for this request. Value must have pattern (?:(?:\[-a-z0-9\]{1,63}\.)*(?:\[a-z\](?:\[-a-z0-9\]{0,61}\[a-z0-9\])?):)?(?:\[0-9\]{1,19}|(?:\[a-z0-9\](?:\[-a-z0-9\]{0,61}\[a-z0-9\])?)).

zone - The name of the zone for this request. Value must have pattern \[a-z\](?:\[-a-z0-9\]{0,61}\[a-z0-9\])?.

instance - Name of the target instance scoping this request, or '-' if the request should span over all instances in the container. Value must have pattern -|\[a-z\](?:\[-a-z0-9\]{0,61}\[a-z0-9\])?|\[1-9\]\[0-9\]{0,19}.

filter - A filter expression that filters resources listed in the response. Most Compute resources support two types of filter expressions: expressions that support regular expressions and expressions that follow API improvement proposal AIP-160. These two types of filter expressions cannot be mixed in one request. If you want to use AIP-160, your expression must specify the field name, an operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The 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. The :* comparison can be used to test whether a key has been defined. For example, to find all objects with owner label use: labels.owner:* 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) If you want to use a regular expression, use the eq (equal) or ne (not equal) operator against a single un-parenthesized expression with or without quotes or against multiple parenthesized expressions. Examples: fieldname eq unquoted literal fieldname eq 'single quoted literal' fieldname eq "double quoted literal" (fieldname1 eq literal) (fieldname2 ne "literal") The literal value is interpreted as a regular expression using Google RE2 library syntax. The literal value must match the entire field. For example, to filter for instances that do not end with name "instance", you would use name ne .*instance. You cannot combine constraints on multiple fields using regular expressions.

maxResults - 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)

orderBy - 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.

pageToken - Specifies a page token to use. Set pageToken to the nextPageToken returned by a previous list request to get the next page of results.

returnPartialSuccess - Opt-in for partial success behavior which provides partial results in case of failure. The default value is false. For example, when partial success behavior is enabled, aggregatedList for a single zone scope either returns all resources in the zone or no resources, with an error code.

$fields - Selector specifying which fields to include in a partial response.

Completes with a InstanceListReferrers.

Completes with a commons.ApiRequestError if the API endpoint returned an error.

If the used http.Client completes with an error when making a REST call, this method will complete with the same error.

Implementation

async.Future<InstanceListReferrers> listReferrers(
  core.String project,
  core.String zone,
  core.String instance, {
  core.String? filter,
  core.int? maxResults,
  core.String? orderBy,
  core.String? pageToken,
  core.bool? returnPartialSuccess,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (filter != null) 'filter': [filter],
    if (maxResults != null) 'maxResults': ['${maxResults}'],
    if (orderBy != null) 'orderBy': [orderBy],
    if (pageToken != null) 'pageToken': [pageToken],
    if (returnPartialSuccess != null)
      'returnPartialSuccess': ['${returnPartialSuccess}'],
    if ($fields != null) 'fields': [$fields],
  };

  final url_ = 'projects/' +
      commons.escapeVariable('$project') +
      '/zones/' +
      commons.escapeVariable('$zone') +
      '/instances/' +
      commons.escapeVariable('$instance') +
      '/referrers';

  final response_ = await _requester.request(
    url_,
    'GET',
    queryParams: queryParams_,
  );
  return InstanceListReferrers.fromJson(
      response_ as core.Map<core.String, core.dynamic>);
}