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api_op_DescribeSnapshots.go
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api_op_DescribeSnapshots.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package ec2
import (
"context"
"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/ec2/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"
)
// Describes the specified EBS snapshots available to you or all of the EBS
// snapshots available to you. The snapshots available to you include public
// snapshots, private snapshots that you own, and private snapshots owned by other
// AWS accounts for which you have explicit create volume permissions. The create
// volume permissions fall into the following categories:
//
// * public: The owner of
// the snapshot granted create volume permissions for the snapshot to the all
// group. All AWS accounts have create volume permissions for these snapshots.
//
// *
// explicit: The owner of the snapshot granted create volume permissions to a
// specific AWS account.
//
// * implicit: An AWS account has implicit create volume
// permissions for all snapshots it owns.
//
// The list of snapshots returned can be
// filtered by specifying snapshot IDs, snapshot owners, or AWS accounts with
// create volume permissions. If no options are specified, Amazon EC2 returns all
// snapshots for which you have create volume permissions. If you specify one or
// more snapshot IDs, only snapshots that have the specified IDs are returned. If
// you specify an invalid snapshot ID, an error is returned. If you specify a
// snapshot ID for which you do not have access, it is not included in the returned
// results. If you specify one or more snapshot owners using the OwnerIds option,
// only snapshots from the specified owners and for which you have access are
// returned. The results can include the AWS account IDs of the specified owners,
// amazon for snapshots owned by Amazon, or self for snapshots that you own. If you
// specify a list of restorable users, only snapshots with create snapshot
// permissions for those users are returned. You can specify AWS account IDs (if
// you own the snapshots), self for snapshots for which you own or have explicit
// permissions, or all for public snapshots. If you are describing a long list of
// snapshots, we recommend that you paginate the output to make the list more
// manageable. The MaxResults parameter sets the maximum number of results returned
// in a single page. If the list of results exceeds your MaxResults value, then
// that number of results is returned along with a NextToken value that can be
// passed to a subsequent DescribeSnapshots request to retrieve the remaining
// results. To get the state of fast snapshot restores for a snapshot, use
// DescribeFastSnapshotRestores. For more information about EBS snapshots, see
// Amazon EBS snapshots
// (https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSSnapshots.html) in the
// Amazon Elastic Compute Cloud User Guide.
func (c *Client) DescribeSnapshots(ctx context.Context, params *DescribeSnapshotsInput, optFns ...func(*Options)) (*DescribeSnapshotsOutput, error) {
if params == nil {
params = &DescribeSnapshotsInput{}
}
result, metadata, err := c.invokeOperation(ctx, "DescribeSnapshots", params, optFns, addOperationDescribeSnapshotsMiddlewares)
if err != nil {
return nil, err
}
out := result.(*DescribeSnapshotsOutput)
out.ResultMetadata = metadata
return out, nil
}
type DescribeSnapshotsInput struct {
// Checks whether you have the required permissions for the action, without
// actually making the request, and provides an error response. If you have the
// required permissions, the error response is DryRunOperation. Otherwise, it is
// UnauthorizedOperation.
DryRun *bool
// The filters.
//
// * description - A description of the snapshot.
//
// * encrypted -
// Indicates whether the snapshot is encrypted (true | false)
//
// * owner-alias - The
// owner alias, from an Amazon-maintained list (amazon). This is not the
// user-configured AWS account alias set using the IAM console. We recommend that
// you use the related parameter instead of this filter.
//
// * owner-id - The AWS
// account ID of the owner. We recommend that you use the related parameter instead
// of this filter.
//
// * progress - The progress of the snapshot, as a percentage (for
// example, 80%).
//
// * snapshot-id - The snapshot ID.
//
// * start-time - The time stamp
// when the snapshot was initiated.
//
// * status - The status of the snapshot (pending
// | completed | error).
//
// * tag: - The key/value combination of a tag assigned to
// the resource. Use the tag key in the filter name and the tag value as the filter
// value. For example, to find all resources that have a tag with the key Owner and
// the value TeamA, specify tag:Owner for the filter name and TeamA for the filter
// value.
//
// * tag-key - The key of a tag assigned to the resource. Use this filter
// to find all resources assigned a tag with a specific key, regardless of the tag
// value.
//
// * volume-id - The ID of the volume the snapshot is for.
//
// * volume-size -
// The size of the volume, in GiB.
Filters []types.Filter
// The maximum number of snapshot results returned by DescribeSnapshots in
// paginated output. When this parameter is used, DescribeSnapshots only returns
// MaxResults results in a single page along with a NextToken response element. The
// remaining results of the initial request can be seen by sending another
// DescribeSnapshots request with the returned NextToken value. This value can be
// between 5 and 1,000; if MaxResults is given a value larger than 1,000, only
// 1,000 results are returned. If this parameter is not used, then
// DescribeSnapshots returns all results. You cannot specify this parameter and the
// snapshot IDs parameter in the same request.
MaxResults *int32
// The NextToken value returned from a previous paginated DescribeSnapshots request
// where MaxResults was used and the results exceeded the value of that parameter.
// Pagination continues from the end of the previous results that returned the
// NextToken value. This value is null when there are no more results to return.
NextToken *string
// Scopes the results to snapshots with the specified owners. You can specify a
// combination of AWS account IDs, self, and amazon.
OwnerIds []string
// The IDs of the AWS accounts that can create volumes from the snapshot.
RestorableByUserIds []string
// The snapshot IDs. Default: Describes the snapshots for which you have create
// volume permissions.
SnapshotIds []string
}
type DescribeSnapshotsOutput struct {
// The NextToken value to include in a future DescribeSnapshots request. When the
// results of a DescribeSnapshots request exceed MaxResults, this value can be used
// to retrieve the next page of results. This value is null when there are no more
// results to return.
NextToken *string
// Information about the snapshots.
Snapshots []types.Snapshot
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
}
func addOperationDescribeSnapshotsMiddlewares(stack *middleware.Stack, options Options) (err error) {
err = stack.Serialize.Add(&awsEc2query_serializeOpDescribeSnapshots{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsEc2query_deserializeOpDescribeSnapshots{}, 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 = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeSnapshots(options.Region), middleware.Before); 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
}
// DescribeSnapshotsAPIClient is a client that implements the DescribeSnapshots
// operation.
type DescribeSnapshotsAPIClient interface {
DescribeSnapshots(context.Context, *DescribeSnapshotsInput, ...func(*Options)) (*DescribeSnapshotsOutput, error)
}
var _ DescribeSnapshotsAPIClient = (*Client)(nil)
// DescribeSnapshotsPaginatorOptions is the paginator options for DescribeSnapshots
type DescribeSnapshotsPaginatorOptions struct {
// The maximum number of snapshot results returned by DescribeSnapshots in
// paginated output. When this parameter is used, DescribeSnapshots only returns
// MaxResults results in a single page along with a NextToken response element. The
// remaining results of the initial request can be seen by sending another
// DescribeSnapshots request with the returned NextToken value. This value can be
// between 5 and 1,000; if MaxResults is given a value larger than 1,000, only
// 1,000 results are returned. If this parameter is not used, then
// DescribeSnapshots returns all results. You cannot specify this parameter and the
// snapshot IDs parameter in the same request.
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
}
// DescribeSnapshotsPaginator is a paginator for DescribeSnapshots
type DescribeSnapshotsPaginator struct {
options DescribeSnapshotsPaginatorOptions
client DescribeSnapshotsAPIClient
params *DescribeSnapshotsInput
nextToken *string
firstPage bool
}
// NewDescribeSnapshotsPaginator returns a new DescribeSnapshotsPaginator
func NewDescribeSnapshotsPaginator(client DescribeSnapshotsAPIClient, params *DescribeSnapshotsInput, optFns ...func(*DescribeSnapshotsPaginatorOptions)) *DescribeSnapshotsPaginator {
if params == nil {
params = &DescribeSnapshotsInput{}
}
options := DescribeSnapshotsPaginatorOptions{}
if params.MaxResults != nil {
options.Limit = *params.MaxResults
}
for _, fn := range optFns {
fn(&options)
}
return &DescribeSnapshotsPaginator{
options: options,
client: client,
params: params,
firstPage: true,
}
}
// HasMorePages returns a boolean indicating whether more pages are available
func (p *DescribeSnapshotsPaginator) HasMorePages() bool {
return p.firstPage || p.nextToken != nil
}
// NextPage retrieves the next DescribeSnapshots page.
func (p *DescribeSnapshotsPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*DescribeSnapshotsOutput, error) {
if !p.HasMorePages() {
return nil, fmt.Errorf("no more pages available")
}
params := *p.params
params.NextToken = p.nextToken
var limit *int32
if p.options.Limit > 0 {
limit = &p.options.Limit
}
params.MaxResults = limit
result, err := p.client.DescribeSnapshots(ctx, ¶ms, optFns...)
if err != nil {
return nil, err
}
p.firstPage = false
prevToken := p.nextToken
p.nextToken = result.NextToken
if p.options.StopOnDuplicateToken && prevToken != nil && p.nextToken != nil && *prevToken == *p.nextToken {
p.nextToken = nil
}
return result, nil
}
// SnapshotCompletedWaiterOptions are waiter options for SnapshotCompletedWaiter
type SnapshotCompletedWaiterOptions 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,
// SnapshotCompletedWaiter will use default minimum delay of 15 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, SnapshotCompletedWaiter 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, *DescribeSnapshotsInput, *DescribeSnapshotsOutput, error) (bool, error)
}
// SnapshotCompletedWaiter defines the waiters for SnapshotCompleted
type SnapshotCompletedWaiter struct {
client DescribeSnapshotsAPIClient
options SnapshotCompletedWaiterOptions
}
// NewSnapshotCompletedWaiter constructs a SnapshotCompletedWaiter.
func NewSnapshotCompletedWaiter(client DescribeSnapshotsAPIClient, optFns ...func(*SnapshotCompletedWaiterOptions)) *SnapshotCompletedWaiter {
options := SnapshotCompletedWaiterOptions{}
options.MinDelay = 15 * time.Second
options.MaxDelay = 120 * time.Second
options.Retryable = snapshotCompletedStateRetryable
for _, fn := range optFns {
fn(&options)
}
return &SnapshotCompletedWaiter{
client: client,
options: options,
}
}
// Wait calls the waiter function for SnapshotCompleted waiter. The maxWaitDur is
// the maximum wait duration the waiter will wait. The maxWaitDur is required and
// must be greater than zero.
func (w *SnapshotCompletedWaiter) Wait(ctx context.Context, params *DescribeSnapshotsInput, maxWaitDur time.Duration, optFns ...func(*SnapshotCompletedWaiterOptions)) error {
if maxWaitDur <= 0 {
return 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 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.DescribeSnapshots(ctx, params, func(o *Options) {
o.APIOptions = append(o.APIOptions, apiOptions...)
})
retryable, err := options.Retryable(ctx, params, out, err)
if err != nil {
return err
}
if !retryable {
return 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 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 fmt.Errorf("request cancelled while waiting, %w", err)
}
}
return fmt.Errorf("exceeded max wait time for SnapshotCompleted waiter")
}
func snapshotCompletedStateRetryable(ctx context.Context, input *DescribeSnapshotsInput, output *DescribeSnapshotsOutput, err error) (bool, error) {
if err == nil {
pathValue, err := jmespath.Search("Snapshots[].State", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "completed"
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.(types.SnapshotState)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.SnapshotState value, got %T", pathValue)
}
if string(value) != expectedValue {
match = false
}
}
if match {
return false, nil
}
}
return true, nil
}
func newServiceMetadataMiddleware_opDescribeSnapshots(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
SigningName: "ec2",
OperationName: "DescribeSnapshots",
}
}