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api_op_DescribeCluster.go
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api_op_DescribeCluster.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package eks
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/eks/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"
"time"
)
// Returns descriptive information about an Amazon EKS cluster. The API server
// endpoint and certificate authority data returned by this operation are required
// for kubelet and kubectl to communicate with your Kubernetes API server. For
// more information, see Create a kubeconfig for Amazon EKS (https://docs.aws.amazon.com/eks/latest/userguide/create-kubeconfig.html)
// . The API server endpoint and certificate authority data aren't available until
// the cluster reaches the ACTIVE state.
func (c *Client) DescribeCluster(ctx context.Context, params *DescribeClusterInput, optFns ...func(*Options)) (*DescribeClusterOutput, error) {
if params == nil {
params = &DescribeClusterInput{}
}
result, metadata, err := c.invokeOperation(ctx, "DescribeCluster", params, optFns, c.addOperationDescribeClusterMiddlewares)
if err != nil {
return nil, err
}
out := result.(*DescribeClusterOutput)
out.ResultMetadata = metadata
return out, nil
}
type DescribeClusterInput struct {
// The name of the cluster to describe.
//
// This member is required.
Name *string
noSmithyDocumentSerde
}
type DescribeClusterOutput struct {
// The full description of your specified cluster.
Cluster *types.Cluster
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationDescribeClusterMiddlewares(stack *middleware.Stack, options Options) (err error) {
err = stack.Serialize.Add(&awsRestjson1_serializeOpDescribeCluster{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsRestjson1_deserializeOpDescribeCluster{}, 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); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = addOpDescribeClusterValidationMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeCluster(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
}
// DescribeClusterAPIClient is a client that implements the DescribeCluster
// operation.
type DescribeClusterAPIClient interface {
DescribeCluster(context.Context, *DescribeClusterInput, ...func(*Options)) (*DescribeClusterOutput, error)
}
var _ DescribeClusterAPIClient = (*Client)(nil)
// ClusterActiveWaiterOptions are waiter options for ClusterActiveWaiter
type ClusterActiveWaiterOptions 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,
// ClusterActiveWaiter 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, ClusterActiveWaiter 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, *DescribeClusterInput, *DescribeClusterOutput, error) (bool, error)
}
// ClusterActiveWaiter defines the waiters for ClusterActive
type ClusterActiveWaiter struct {
client DescribeClusterAPIClient
options ClusterActiveWaiterOptions
}
// NewClusterActiveWaiter constructs a ClusterActiveWaiter.
func NewClusterActiveWaiter(client DescribeClusterAPIClient, optFns ...func(*ClusterActiveWaiterOptions)) *ClusterActiveWaiter {
options := ClusterActiveWaiterOptions{}
options.MinDelay = 30 * time.Second
options.MaxDelay = 120 * time.Second
options.Retryable = clusterActiveStateRetryable
for _, fn := range optFns {
fn(&options)
}
return &ClusterActiveWaiter{
client: client,
options: options,
}
}
// Wait calls the waiter function for ClusterActive waiter. The maxWaitDur is the
// maximum wait duration the waiter will wait. The maxWaitDur is required and must
// be greater than zero.
func (w *ClusterActiveWaiter) Wait(ctx context.Context, params *DescribeClusterInput, maxWaitDur time.Duration, optFns ...func(*ClusterActiveWaiterOptions)) error {
_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
return err
}
// WaitForOutput calls the waiter function for ClusterActive 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 *ClusterActiveWaiter) WaitForOutput(ctx context.Context, params *DescribeClusterInput, maxWaitDur time.Duration, optFns ...func(*ClusterActiveWaiterOptions)) (*DescribeClusterOutput, 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.DescribeCluster(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 ClusterActive waiter")
}
func clusterActiveStateRetryable(ctx context.Context, input *DescribeClusterInput, output *DescribeClusterOutput, err error) (bool, error) {
if err == nil {
pathValue, err := jmespath.Search("cluster.status", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "DELETING"
value, ok := pathValue.(types.ClusterStatus)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.ClusterStatus value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
if err == nil {
pathValue, err := jmespath.Search("cluster.status", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "FAILED"
value, ok := pathValue.(types.ClusterStatus)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.ClusterStatus value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
if err == nil {
pathValue, err := jmespath.Search("cluster.status", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "ACTIVE"
value, ok := pathValue.(types.ClusterStatus)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.ClusterStatus value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, nil
}
}
return true, nil
}
// ClusterDeletedWaiterOptions are waiter options for ClusterDeletedWaiter
type ClusterDeletedWaiterOptions 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,
// ClusterDeletedWaiter 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, ClusterDeletedWaiter 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, *DescribeClusterInput, *DescribeClusterOutput, error) (bool, error)
}
// ClusterDeletedWaiter defines the waiters for ClusterDeleted
type ClusterDeletedWaiter struct {
client DescribeClusterAPIClient
options ClusterDeletedWaiterOptions
}
// NewClusterDeletedWaiter constructs a ClusterDeletedWaiter.
func NewClusterDeletedWaiter(client DescribeClusterAPIClient, optFns ...func(*ClusterDeletedWaiterOptions)) *ClusterDeletedWaiter {
options := ClusterDeletedWaiterOptions{}
options.MinDelay = 30 * time.Second
options.MaxDelay = 120 * time.Second
options.Retryable = clusterDeletedStateRetryable
for _, fn := range optFns {
fn(&options)
}
return &ClusterDeletedWaiter{
client: client,
options: options,
}
}
// Wait calls the waiter function for ClusterDeleted waiter. The maxWaitDur is the
// maximum wait duration the waiter will wait. The maxWaitDur is required and must
// be greater than zero.
func (w *ClusterDeletedWaiter) Wait(ctx context.Context, params *DescribeClusterInput, maxWaitDur time.Duration, optFns ...func(*ClusterDeletedWaiterOptions)) error {
_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
return err
}
// WaitForOutput calls the waiter function for ClusterDeleted 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 *ClusterDeletedWaiter) WaitForOutput(ctx context.Context, params *DescribeClusterInput, maxWaitDur time.Duration, optFns ...func(*ClusterDeletedWaiterOptions)) (*DescribeClusterOutput, 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.DescribeCluster(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 ClusterDeleted waiter")
}
func clusterDeletedStateRetryable(ctx context.Context, input *DescribeClusterInput, output *DescribeClusterOutput, err error) (bool, error) {
if err == nil {
pathValue, err := jmespath.Search("cluster.status", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "ACTIVE"
value, ok := pathValue.(types.ClusterStatus)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.ClusterStatus value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
if err == nil {
pathValue, err := jmespath.Search("cluster.status", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "CREATING"
value, ok := pathValue.(types.ClusterStatus)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.ClusterStatus value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
if err == nil {
pathValue, err := jmespath.Search("cluster.status", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "PENDING"
value, ok := pathValue.(types.ClusterStatus)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.ClusterStatus value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
if err != nil {
var errorType *types.ResourceNotFoundException
if errors.As(err, &errorType) {
return false, nil
}
}
return true, nil
}
func newServiceMetadataMiddleware_opDescribeCluster(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
SigningName: "eks",
OperationName: "DescribeCluster",
}
}