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Deprecate "devicemapper" storage driver. #1424

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Oct 17, 2018
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Deprecate "devicemapper" storage driver. #1424

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15 changes: 15 additions & 0 deletions docs/deprecated.md
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Expand Up @@ -34,6 +34,21 @@ on pre 4.x kernels. Now that all supported distributions are able to run `overla
(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.

### device mapper storage driver

**Deprecated in Release: v18.09.0**

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.

### Reserved namespaces in engine labels

Expand Down