[18.09 backport] deprecate devicemapper and legacy overlay storage drivers #1455
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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 8bc2aa4) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The `devicemapper` storage driver is deprecated in favor of `overlay2`, and will be removed in a future release. Users of the `devicemapper` storage driver are recommended to migrate to a different storage driver, such as `overlay2`, which is now the default storage driver. The `devicemapper` storage driver facilitates running Docker on older (3.x) kernels that have no support for other storage drivers (such as overlay2, or AUFS). Now that support for `overlay2` is added to all supported distros (as they are either on kernel 4.x, or have support for multiple lowerdirs backported), there is no reason to continue maintenance of the `devicemapper` storage driver. Signed-off-by: Sebastiaan van Stijn <github@gone.nl> (cherry picked from commit 662441b) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Codecov Report
@@ Coverage Diff @@
## 18.09 #1455 +/- ##
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Coverage 54.07% 54.07%
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Files 290 290
Lines 19391 19391
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Hits 10485 10485
Misses 8237 8237
Partials 669 669 |
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backport of #1424 and #1425 for 18.09
cherry-pick was clean; no conflicts