Johannes 'fish' Ziemke 32c2485efa Add ErrPrerequisites to improve misleading errors ...

There are two cases where we can't use a graphdriver:

1) the graphdriver itself isn't supported by the system
2) the graphdriver is supported by some configuration/prerequisites are
missing

This introduces a new error for the 2) case and uses it when trying to
run docker with btrfs backend on a non-btrfs filesystem.

Docker-DCO-1.1-Signed-off-by: Johannes 'fish' Ziemke <github@freigeist.org> (github: discordianfish)
Upstream-commit: 75754e69f6cce80c34ebc72817ada0a807fd635a
Component: engine

2014-05-29 17:09:55 +02:00

components/engine

Add ErrPrerequisites to improve misleading errors

2014-05-29 17:09:55 +02:00

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