// Code generated by smithy-go-codegen DO NOT EDIT. package rds import ( "context" "errors" "fmt" awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware" "github.com/aws/aws-sdk-go-v2/aws/signer/v4" "github.com/aws/aws-sdk-go-v2/service/rds/types" "github.com/aws/smithy-go/middleware" smithytime "github.com/aws/smithy-go/time" smithyhttp "github.com/aws/smithy-go/transport/http" smithywaiter "github.com/aws/smithy-go/waiter" "github.com/jmespath/go-jmespath" "strconv" "time" ) // Describes existing Amazon Aurora DB clusters and Multi-AZ DB clusters. This API // supports pagination. For more information on Amazon Aurora DB clusters, see // What is Amazon Aurora? (https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/CHAP_AuroraOverview.html) // in the Amazon Aurora User Guide. For more information on Multi-AZ DB clusters, // see Multi-AZ DB cluster deployments (https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/multi-az-db-clusters-concepts.html) // in the Amazon RDS User Guide. This operation can also return information for // Amazon Neptune DB instances and Amazon DocumentDB instances. func (c *Client) DescribeDBClusters(ctx context.Context, params *DescribeDBClustersInput, optFns ...func(*Options)) (*DescribeDBClustersOutput, error) { if params == nil { params = &DescribeDBClustersInput{} } result, metadata, err := c.invokeOperation(ctx, "DescribeDBClusters", params, optFns, c.addOperationDescribeDBClustersMiddlewares) if err != nil { return nil, err } out := result.(*DescribeDBClustersOutput) out.ResultMetadata = metadata return out, nil } type DescribeDBClustersInput struct { // The user-supplied DB cluster identifier or the Amazon Resource Name (ARN) of // the DB cluster. If this parameter is specified, information for only the // specific DB cluster is returned. This parameter isn't case-sensitive. // Constraints: // - If supplied, must match an existing DB cluster identifier. DBClusterIdentifier *string // A filter that specifies one or more DB clusters to describe. Supported Filters: // - clone-group-id - Accepts clone group identifiers. The results list only // includes information about the DB clusters associated with these clone groups. // - db-cluster-id - Accepts DB cluster identifiers and DB cluster Amazon // Resource Names (ARNs). The results list only includes information about the DB // clusters identified by these ARNs. // - db-cluster-resource-id - Accepts DB cluster resource identifiers. The // results list will only include information about the DB clusters identified by // these DB cluster resource identifiers. // - domain - Accepts Active Directory directory IDs. The results list only // includes information about the DB clusters associated with these domains. // - engine - Accepts engine names. The results list only includes information // about the DB clusters for these engines. Filters []types.Filter // Specifies whether the output includes information about clusters shared from // other Amazon Web Services accounts. IncludeShared bool // An optional pagination token provided by a previous DescribeDBClusters request. // If this parameter is specified, the response includes only records beyond the // marker, up to the value specified by MaxRecords . Marker *string // The maximum number of records to include in the response. If more records exist // than the specified MaxRecords value, a pagination token called a marker is // included in the response so you can retrieve the remaining results. Default: 100 // Constraints: Minimum 20, maximum 100. MaxRecords *int32 noSmithyDocumentSerde } // Contains the result of a successful invocation of the DescribeDBClusters action. type DescribeDBClustersOutput struct { // Contains a list of DB clusters for the user. DBClusters []types.DBCluster // A pagination token that can be used in a later DescribeDBClusters request. Marker *string // Metadata pertaining to the operation's result. ResultMetadata middleware.Metadata noSmithyDocumentSerde } func (c *Client) addOperationDescribeDBClustersMiddlewares(stack *middleware.Stack, options Options) (err error) { err = stack.Serialize.Add(&awsAwsquery_serializeOpDescribeDBClusters{}, middleware.After) if err != nil { return err } err = stack.Deserialize.Add(&awsAwsquery_deserializeOpDescribeDBClusters{}, middleware.After) if err != nil { return err } if err = addSetLoggerMiddleware(stack, options); err != nil { return err } if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil { return err } if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil { return err } if err = addResolveEndpointMiddleware(stack, options); err != nil { return err } if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil { return err } if err = addRetryMiddlewares(stack, options); err != nil { return err } if err = addHTTPSignerV4Middleware(stack, options); err != nil { return err } if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil { return err } if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil { return err } if err = addClientUserAgent(stack, options); err != nil { return err } if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil { return err } if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil { return err } if err = addOpDescribeDBClustersValidationMiddleware(stack); err != nil { return err } if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeDBClusters(options.Region), middleware.Before); err != nil { return err } if err = awsmiddleware.AddRecursionDetection(stack); err != nil { return err } if err = addRequestIDRetrieverMiddleware(stack); err != nil { return err } if err = addResponseErrorMiddleware(stack); err != nil { return err } if err = addRequestResponseLogging(stack, options); err != nil { return err } return nil } // DescribeDBClustersAPIClient is a client that implements the DescribeDBClusters // operation. type DescribeDBClustersAPIClient interface { DescribeDBClusters(context.Context, *DescribeDBClustersInput, ...func(*Options)) (*DescribeDBClustersOutput, error) } var _ DescribeDBClustersAPIClient = (*Client)(nil) // DescribeDBClustersPaginatorOptions is the paginator options for // DescribeDBClusters type DescribeDBClustersPaginatorOptions struct { // The maximum number of records to include in the response. If more records exist // than the specified MaxRecords value, a pagination token called a marker is // included in the response so you can retrieve the remaining results. Default: 100 // Constraints: Minimum 20, maximum 100. Limit int32 // Set to true if pagination should stop if the service returns a pagination token // that matches the most recent token provided to the service. StopOnDuplicateToken bool } // DescribeDBClustersPaginator is a paginator for DescribeDBClusters type DescribeDBClustersPaginator struct { options DescribeDBClustersPaginatorOptions client DescribeDBClustersAPIClient params *DescribeDBClustersInput nextToken *string firstPage bool } // NewDescribeDBClustersPaginator returns a new DescribeDBClustersPaginator func NewDescribeDBClustersPaginator(client DescribeDBClustersAPIClient, params *DescribeDBClustersInput, optFns ...func(*DescribeDBClustersPaginatorOptions)) *DescribeDBClustersPaginator { if params == nil { params = &DescribeDBClustersInput{} } options := DescribeDBClustersPaginatorOptions{} if params.MaxRecords != nil { options.Limit = *params.MaxRecords } for _, fn := range optFns { fn(&options) } return &DescribeDBClustersPaginator{ options: options, client: client, params: params, firstPage: true, nextToken: params.Marker, } } // HasMorePages returns a boolean indicating whether more pages are available func (p *DescribeDBClustersPaginator) HasMorePages() bool { return p.firstPage || (p.nextToken != nil && len(*p.nextToken) != 0) } // NextPage retrieves the next DescribeDBClusters page. func (p *DescribeDBClustersPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*DescribeDBClustersOutput, error) { if !p.HasMorePages() { return nil, fmt.Errorf("no more pages available") } params := *p.params params.Marker = p.nextToken var limit *int32 if p.options.Limit > 0 { limit = &p.options.Limit } params.MaxRecords = limit result, err := p.client.DescribeDBClusters(ctx, ¶ms, optFns...) if err != nil { return nil, err } p.firstPage = false prevToken := p.nextToken p.nextToken = result.Marker if p.options.StopOnDuplicateToken && prevToken != nil && p.nextToken != nil && *prevToken == *p.nextToken { p.nextToken = nil } return result, nil } // DBClusterAvailableWaiterOptions are waiter options for DBClusterAvailableWaiter type DBClusterAvailableWaiterOptions struct { // Set of options to modify how an operation is invoked. These apply to all // operations invoked for this client. Use functional options on operation call to // modify this list for per operation behavior. APIOptions []func(*middleware.Stack) error // MinDelay is the minimum amount of time to delay between retries. If unset, // DBClusterAvailableWaiter will use default minimum delay of 30 seconds. Note that // MinDelay must resolve to a value lesser than or equal to the MaxDelay. MinDelay time.Duration // MaxDelay is the maximum amount of time to delay between retries. If unset or // set to zero, DBClusterAvailableWaiter will use default max delay of 120 seconds. // Note that MaxDelay must resolve to value greater than or equal to the MinDelay. MaxDelay time.Duration // LogWaitAttempts is used to enable logging for waiter retry attempts LogWaitAttempts bool // Retryable is function that can be used to override the service defined // waiter-behavior based on operation output, or returned error. This function is // used by the waiter to decide if a state is retryable or a terminal state. By // default service-modeled logic will populate this option. This option can thus be // used to define a custom waiter state with fall-back to service-modeled waiter // state mutators.The function returns an error in case of a failure state. In case // of retry state, this function returns a bool value of true and nil error, while // in case of success it returns a bool value of false and nil error. Retryable func(context.Context, *DescribeDBClustersInput, *DescribeDBClustersOutput, error) (bool, error) } // DBClusterAvailableWaiter defines the waiters for DBClusterAvailable type DBClusterAvailableWaiter struct { client DescribeDBClustersAPIClient options DBClusterAvailableWaiterOptions } // NewDBClusterAvailableWaiter constructs a DBClusterAvailableWaiter. func NewDBClusterAvailableWaiter(client DescribeDBClustersAPIClient, optFns ...func(*DBClusterAvailableWaiterOptions)) *DBClusterAvailableWaiter { options := DBClusterAvailableWaiterOptions{} options.MinDelay = 30 * time.Second options.MaxDelay = 120 * time.Second options.Retryable = dBClusterAvailableStateRetryable for _, fn := range optFns { fn(&options) } return &DBClusterAvailableWaiter{ client: client, options: options, } } // Wait calls the waiter function for DBClusterAvailable waiter. The maxWaitDur is // the maximum wait duration the waiter will wait. The maxWaitDur is required and // must be greater than zero. func (w *DBClusterAvailableWaiter) Wait(ctx context.Context, params *DescribeDBClustersInput, maxWaitDur time.Duration, optFns ...func(*DBClusterAvailableWaiterOptions)) error { _, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...) return err } // WaitForOutput calls the waiter function for DBClusterAvailable waiter and // returns the output of the successful operation. The maxWaitDur is the maximum // wait duration the waiter will wait. The maxWaitDur is required and must be // greater than zero. func (w *DBClusterAvailableWaiter) WaitForOutput(ctx context.Context, params *DescribeDBClustersInput, maxWaitDur time.Duration, optFns ...func(*DBClusterAvailableWaiterOptions)) (*DescribeDBClustersOutput, error) { if maxWaitDur <= 0 { return nil, fmt.Errorf("maximum wait time for waiter must be greater than zero") } options := w.options for _, fn := range optFns { fn(&options) } if options.MaxDelay <= 0 { options.MaxDelay = 120 * time.Second } if options.MinDelay > options.MaxDelay { return nil, fmt.Errorf("minimum waiter delay %v must be lesser than or equal to maximum waiter delay of %v.", options.MinDelay, options.MaxDelay) } ctx, cancelFn := context.WithTimeout(ctx, maxWaitDur) defer cancelFn() logger := smithywaiter.Logger{} remainingTime := maxWaitDur var attempt int64 for { attempt++ apiOptions := options.APIOptions start := time.Now() if options.LogWaitAttempts { logger.Attempt = attempt apiOptions = append([]func(*middleware.Stack) error{}, options.APIOptions...) apiOptions = append(apiOptions, logger.AddLogger) } out, err := w.client.DescribeDBClusters(ctx, params, func(o *Options) { o.APIOptions = append(o.APIOptions, apiOptions...) }) retryable, err := options.Retryable(ctx, params, out, err) if err != nil { return nil, err } if !retryable { return out, nil } remainingTime -= time.Since(start) if remainingTime < options.MinDelay || remainingTime <= 0 { break } // compute exponential backoff between waiter retries delay, err := smithywaiter.ComputeDelay( attempt, options.MinDelay, options.MaxDelay, remainingTime, ) if err != nil { return nil, fmt.Errorf("error computing waiter delay, %w", err) } remainingTime -= delay // sleep for the delay amount before invoking a request if err := smithytime.SleepWithContext(ctx, delay); err != nil { return nil, fmt.Errorf("request cancelled while waiting, %w", err) } } return nil, fmt.Errorf("exceeded max wait time for DBClusterAvailable waiter") } func dBClusterAvailableStateRetryable(ctx context.Context, input *DescribeDBClustersInput, output *DescribeDBClustersOutput, err error) (bool, error) { if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "available" var match = true listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } if len(listOfValues) == 0 { match = false } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) != expectedValue { match = false } } if match { return false, nil } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "deleted" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "deleting" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "failed" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "incompatible-restore" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "incompatible-parameters" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } return true, nil } // DBClusterDeletedWaiterOptions are waiter options for DBClusterDeletedWaiter type DBClusterDeletedWaiterOptions struct { // Set of options to modify how an operation is invoked. These apply to all // operations invoked for this client. Use functional options on operation call to // modify this list for per operation behavior. APIOptions []func(*middleware.Stack) error // MinDelay is the minimum amount of time to delay between retries. If unset, // DBClusterDeletedWaiter will use default minimum delay of 30 seconds. Note that // MinDelay must resolve to a value lesser than or equal to the MaxDelay. MinDelay time.Duration // MaxDelay is the maximum amount of time to delay between retries. If unset or // set to zero, DBClusterDeletedWaiter will use default max delay of 120 seconds. // Note that MaxDelay must resolve to value greater than or equal to the MinDelay. MaxDelay time.Duration // LogWaitAttempts is used to enable logging for waiter retry attempts LogWaitAttempts bool // Retryable is function that can be used to override the service defined // waiter-behavior based on operation output, or returned error. This function is // used by the waiter to decide if a state is retryable or a terminal state. By // default service-modeled logic will populate this option. This option can thus be // used to define a custom waiter state with fall-back to service-modeled waiter // state mutators.The function returns an error in case of a failure state. In case // of retry state, this function returns a bool value of true and nil error, while // in case of success it returns a bool value of false and nil error. Retryable func(context.Context, *DescribeDBClustersInput, *DescribeDBClustersOutput, error) (bool, error) } // DBClusterDeletedWaiter defines the waiters for DBClusterDeleted type DBClusterDeletedWaiter struct { client DescribeDBClustersAPIClient options DBClusterDeletedWaiterOptions } // NewDBClusterDeletedWaiter constructs a DBClusterDeletedWaiter. func NewDBClusterDeletedWaiter(client DescribeDBClustersAPIClient, optFns ...func(*DBClusterDeletedWaiterOptions)) *DBClusterDeletedWaiter { options := DBClusterDeletedWaiterOptions{} options.MinDelay = 30 * time.Second options.MaxDelay = 120 * time.Second options.Retryable = dBClusterDeletedStateRetryable for _, fn := range optFns { fn(&options) } return &DBClusterDeletedWaiter{ client: client, options: options, } } // Wait calls the waiter function for DBClusterDeleted waiter. The maxWaitDur is // the maximum wait duration the waiter will wait. The maxWaitDur is required and // must be greater than zero. func (w *DBClusterDeletedWaiter) Wait(ctx context.Context, params *DescribeDBClustersInput, maxWaitDur time.Duration, optFns ...func(*DBClusterDeletedWaiterOptions)) error { _, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...) return err } // WaitForOutput calls the waiter function for DBClusterDeleted waiter and returns // the output of the successful operation. The maxWaitDur is the maximum wait // duration the waiter will wait. The maxWaitDur is required and must be greater // than zero. func (w *DBClusterDeletedWaiter) WaitForOutput(ctx context.Context, params *DescribeDBClustersInput, maxWaitDur time.Duration, optFns ...func(*DBClusterDeletedWaiterOptions)) (*DescribeDBClustersOutput, error) { if maxWaitDur <= 0 { return nil, fmt.Errorf("maximum wait time for waiter must be greater than zero") } options := w.options for _, fn := range optFns { fn(&options) } if options.MaxDelay <= 0 { options.MaxDelay = 120 * time.Second } if options.MinDelay > options.MaxDelay { return nil, fmt.Errorf("minimum waiter delay %v must be lesser than or equal to maximum waiter delay of %v.", options.MinDelay, options.MaxDelay) } ctx, cancelFn := context.WithTimeout(ctx, maxWaitDur) defer cancelFn() logger := smithywaiter.Logger{} remainingTime := maxWaitDur var attempt int64 for { attempt++ apiOptions := options.APIOptions start := time.Now() if options.LogWaitAttempts { logger.Attempt = attempt apiOptions = append([]func(*middleware.Stack) error{}, options.APIOptions...) apiOptions = append(apiOptions, logger.AddLogger) } out, err := w.client.DescribeDBClusters(ctx, params, func(o *Options) { o.APIOptions = append(o.APIOptions, apiOptions...) }) retryable, err := options.Retryable(ctx, params, out, err) if err != nil { return nil, err } if !retryable { return out, nil } remainingTime -= time.Since(start) if remainingTime < options.MinDelay || remainingTime <= 0 { break } // compute exponential backoff between waiter retries delay, err := smithywaiter.ComputeDelay( attempt, options.MinDelay, options.MaxDelay, remainingTime, ) if err != nil { return nil, fmt.Errorf("error computing waiter delay, %w", err) } remainingTime -= delay // sleep for the delay amount before invoking a request if err := smithytime.SleepWithContext(ctx, delay); err != nil { return nil, fmt.Errorf("request cancelled while waiting, %w", err) } } return nil, fmt.Errorf("exceeded max wait time for DBClusterDeleted waiter") } func dBClusterDeletedStateRetryable(ctx context.Context, input *DescribeDBClustersInput, output *DescribeDBClustersOutput, err error) (bool, error) { if err == nil { pathValue, err := jmespath.Search("length(DBClusters) == `0`", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "true" bv, err := strconv.ParseBool(expectedValue) if err != nil { return false, fmt.Errorf("error parsing boolean from string %w", err) } value, ok := pathValue.(bool) if !ok { return false, fmt.Errorf("waiter comparator expected bool value got %T", pathValue) } if value == bv { return false, nil } } if err != nil { var errorType *types.DBClusterNotFoundFault if errors.As(err, &errorType) { return false, nil } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "creating" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "modifying" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "rebooting" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } if err == nil { pathValue, err := jmespath.Search("DBClusters[].Status", output) if err != nil { return false, fmt.Errorf("error evaluating waiter state: %w", err) } expectedValue := "resetting-master-credentials" listOfValues, ok := pathValue.([]interface{}) if !ok { return false, fmt.Errorf("waiter comparator expected list got %T", pathValue) } for _, v := range listOfValues { value, ok := v.(*string) if !ok { return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue) } if string(*value) == expectedValue { return false, fmt.Errorf("waiter state transitioned to Failure") } } } return true, nil } func newServiceMetadataMiddleware_opDescribeDBClusters(region string) *awsmiddleware.RegisterServiceMetadata { return &awsmiddleware.RegisterServiceMetadata{ Region: region, ServiceID: ServiceID, SigningName: "rds", OperationName: "DescribeDBClusters", } }