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fallback to /dev/mapper device if metadata device is not set in docker info

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This commit is contained in:
Seth Jennings 2016-06-09 15:24:26 -05:00
parent 267066c0f9
commit f3bca888f8
1 changed files with 14 additions and 2 deletions
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16
utils/docker/docker.go
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@ -16,6 +16,7 @@ package docker
import (
"fmt"
"os"
"strings"
dockertypes "github.com/docker/engine-api/types"
@ -50,8 +51,19 @@ 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, err := DockerThinPoolName(info)
if err != nil {
return "", err
}
metadataDevice = fmt.Sprintf("/dev/mapper/%s_tmeta", poolName)
if _, err := os.Stat(metadataDevice); err != nil {
return "", err
}
return metadataDevice, nil