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73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
package retryhandler
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import (
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"context"
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"fmt"
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"io"
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"net"
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"syscall"
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"time"
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"github.com/containerd/containerd/images"
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remoteserrors "github.com/containerd/containerd/remotes/errors"
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ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
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"github.com/pkg/errors"
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)
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func New(f images.HandlerFunc, logger func([]byte)) images.HandlerFunc {
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return func(ctx context.Context, desc ocispecs.Descriptor) ([]ocispecs.Descriptor, error) {
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backoff := time.Second
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for {
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descs, err := f(ctx, desc)
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if err != nil {
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select {
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case <-ctx.Done():
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return nil, err
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default:
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if !retryError(err) {
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return nil, err
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}
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}
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if logger != nil {
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logger([]byte(fmt.Sprintf("error: %v\n", err.Error())))
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}
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} else {
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return descs, nil
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}
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// backoff logic
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if backoff >= 8*time.Second {
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return nil, err
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}
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if logger != nil {
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logger([]byte(fmt.Sprintf("retrying in %v\n", backoff)))
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}
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time.Sleep(backoff)
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backoff *= 2
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}
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}
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}
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func retryError(err error) bool {
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// Retry on 5xx errors
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var errUnexpectedStatus remoteserrors.ErrUnexpectedStatus
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if errors.As(err, &errUnexpectedStatus) &&
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errUnexpectedStatus.StatusCode >= 500 &&
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errUnexpectedStatus.StatusCode <= 599 {
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return true
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}
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if errors.Is(err, io.EOF) || errors.Is(err, syscall.ECONNRESET) || errors.Is(err, syscall.EPIPE) || errors.Is(err, net.ErrClosed) {
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return true
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}
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// catches TLS timeout or other network-related temporary errors
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if ne, ok := errors.Cause(err).(net.Error); ok && ne.Temporary() {
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return true
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}
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// https://github.com/containerd/containerd/pull/4724
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if errors.Cause(err).Error() == "no response" {
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return true
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}
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return false
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}
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