Function getRwLayerID

container/docker/handler.go:109–124

(containerID, storageDir string, sd StorageDriver, dockerVersion []int)

var _ container.ContainerHandler = &containerHandler{}

func getRwLayerID(containerID, storageDir string, sd StorageDriver, dockerVersion []int) (string, error) {
	const (
		// Docker version >=1.10.0 have a randomized ID for the root fs of a container.
		randomizedRWLayerMinorVersion = 10
		rwLayerIDFile                 = "mount-id"
	)
	if (dockerVersion[0] <= 1) && (dockerVersion[1] < randomizedRWLayerMinorVersion) {
		return containerID, nil
	}

	bytes, err := os.ReadFile(path.Join(storageDir, "image", string(sd), "layerdb", "mounts", containerID, rwLayerIDFile))
	if err != nil {
		return "", fmt.Errorf("failed to identify the read-write layer ID for container %q. - %v", containerID, err)
	}
	return string(bytes), err
}

// newContainerHandler returns a new container.ContainerHandler
func newContainerHandler(