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overlayfs: more helpful output when not supported

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based on https://github.com/docker/docker/pull/7619#discussion_r20385086

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
This commit is contained in:
Vincent Batts 2014-11-18 15:07:48 -05:00 committed by Vincent Batts
parent 660eadae3d
commit 3287ca1e45
1 changed files with 1 additions and 0 deletions
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daemon/graphdriver/overlayfs/overlayfs.go
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@ -129,6 +129,7 @@ func supportsOverlayfs() error {
return nil return nil
} }
} }
log.Error("'overlayfs' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlayfs support loaded.")
return graphdriver.ErrNotSupported return graphdriver.ErrNotSupported
} }