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Deprecate legacy overlay storage driver, and add warning

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The `overlay` storage driver is deprecated in favor of the `overlay2` storage
driver, which has all the benefits of `overlay`, without its limitations (excessive
inode consumption). The legacy `overlay` storage driver will be removed in a future
release. Users of the `overlay` storage driver should migrate to the `overlay2`
storage driver.

The legacy `overlay` storage driver allowed using overlayFS-backed filesystems
on pre 4.x kernels. Now that all supported distributions are able to run `overlay2`
(as they are either on kernel 4.x, or have support for multiple lowerdirs
backported), there is no reason to keep maintaining the `overlay` storage driver.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 31be4e0ba1)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2018-10-11 12:47:34 +02:00
parent 734e7a8e55
commit c20e8dffbb
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GPG key ID: 76698F39D527CE8C
2 changed files with 2 additions and 2 deletions
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2
daemon/graphdriver/driver.go
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@ -314,7 +314,7 @@ func isEmptyDir(name string) bool {
func isDeprecated(name string) bool { func isDeprecated(name string) bool {
switch name { switch name {
// NOTE: when deprecating a driver, update daemon.fillDriverInfo() accordingly // NOTE: when deprecating a driver, update daemon.fillDriverInfo() accordingly
case "devicemapper": case "devicemapper", "overlay":
return true return true
} }
return false return false

2
daemon/info.go
View file

@ -132,7 +132,7 @@ func (daemon *Daemon) fillDriverInfo(v *types.Info) {
drivers += fmt.Sprintf(" (%s) ", os) drivers += fmt.Sprintf(" (%s) ", os)
} }
switch gd { switch gd {
case "devicemapper": case "devicemapper", "overlay":
v.Warnings = append(v.Warnings, fmt.Sprintf("WARNING: the %s storage-driver is deprecated, and will be removed in a future release.", gd)) v.Warnings = append(v.Warnings, fmt.Sprintf("WARNING: the %s storage-driver is deprecated, and will be removed in a future release.", gd))
} }
} }