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Merge pull request #36052 from Microsoft/jjh/no-overlay-off-only-one-disk

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LCOW: Regular mount if only one layer
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Sebastiaan van Stijn 2018-01-25 15:46:16 -08:00 committed by GitHub
commit a8d0e36d03
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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, ","),