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LCOW: Regular mount if only one layer

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Signed-off-by: John Howard <jhoward@microsoft.com>
This commit is contained in:
John Howard 2018-01-18 09:38:53 -08:00
parent 6feae06003
commit 420dc4eeb4
1 changed files with 4 additions and 1 deletions
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5
daemon/graphdriver/lcow/lcow_svm.go
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@ -299,7 +299,10 @@ func (svm *serviceVM) createUnionMount(mountName string, mvds ...hcsshim.MappedV
}
var cmd string
if mvds[0].ReadOnly {
if len(mvds) == 1 {
// `FROM SCRATCH` case and the only layer. No overlay required.
cmd = fmt.Sprintf("mount %s %s", mvds[0].ContainerPath, mountName)
} else if mvds[0].ReadOnly {
// Readonly overlay
cmd = fmt.Sprintf("mount -t overlay overlay -olowerdir=%s %s",
strings.Join(lowerLayers, ","),