fallback to /dev/mapper device if metadata device is not set in docke…

…r info
google · Jun 21, 2016 · 8f3d376 · 8f3d376
1 parent 1c8d789
commit 8f3d376
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/utils/docker/docker.go b/utils/docker/docker.go
@@ -50,9 +50,15 @@ func DockerThinPoolName(info dockertypes.Info) (string, error) {
 
 func DockerMetadataDevice(info dockertypes.Info) (string, error) {
 	metadataDevice := DriverStatusValue(info.DriverStatus, DriverStatusMetadataFile)
-	if len(metadataDevice) == 0 {
-		return "", fmt.Errorf("Could not get the devicemapper metadata device")
+	if len(metadataDevice) != 0 {
+		return metadataDevice, nil
 	}
 
+	poolName := DockerThinPoolName(info)
+	if err != nil {
+		return "", err
+	}
+
+	metadataDevice = fmt.Sprintf("/dev/mapper/%s_tmeta", poolName)
 	return metadataDevice, nil
 }