Merge pull request #191 from dagger/buildkit-wait-ready
buildkit: wait for buildkitd to be ready before connecting
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commit
a20ec1269b
@ -2,11 +2,15 @@ package buildkitd
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import (
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"context"
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"errors"
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"fmt"
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"os/exec"
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"strings"
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"time"
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"github.com/docker/distribution/reference"
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bk "github.com/moby/buildkit/client"
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_ "github.com/moby/buildkit/client/connhelper/dockercontainer" // import the container connection driver
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"github.com/rs/zerolog/log"
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)
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@ -120,7 +124,31 @@ func startBuildkit(ctx context.Context) error {
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Msg("unable to start buildkitd")
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return err
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}
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return nil
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return waitBuildkit(ctx)
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}
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// waitBuildkit waits for the buildkit daemon to be responsive.
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func waitBuildkit(ctx context.Context) error {
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c, err := bk.New(ctx, "docker-container://"+containerName)
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if err != nil {
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return err
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}
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defer c.Close()
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// Try to connect every 100ms up to 50 times (5 seconds total)
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const (
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retryPeriod = 100 * time.Millisecond
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retryAttempts = 50
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)
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for retry := 0; retry < retryAttempts; retry++ {
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_, err = c.ListWorkers(ctx)
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if err == nil {
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return nil
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}
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time.Sleep(retryPeriod)
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}
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return errors.New("buildkit failed to respond")
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}
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func remvoveBuildkit(ctx context.Context) error {
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