daemon/graphdriver: don't unmount graphdriver root #41903
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thaJeztah
added
area/storage/aufs
area/storage/devicemapper
area/storage
area/storage/overlay
status/2-code-review
kind/enhancement
Most graphdrivers no longer re-mount the graphdriver root, so we should not try to unmount the root itself, to allow users to mount a custom storage location at the graphdriver's root. Some exceptions: - BTRFS looks to still do a remount; https://github.com/moby/moby/blob/v20.10.2/daemon/graphdriver/btrfs/btrfs.go#L86-L90 - Devicemapper's "shutdown" function calls "unmountAndDeactivateAl()", which unmounts all mounts https://github.com/moby/moby/blob/v20.10.2/daemon/graphdriver/devmapper/deviceset.go#L2245-L2277 NOTE: Perhaps no unmounting is needed at all, looking at; - commit 3609b05 (scoped "makeprivate" to graphdriver root only) - commit 9803272 (removed the "makeprivate") Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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depends on moby/sys#62
fixes #39267
Most graphdrivers no longer re-mount the graphdriver root, so we should not try to unmount the root itself, to allow users to mount a custom storage location at the graphdriver's root.
Some exceptions:
all mounts https://github.com/moby/moby/blob/v20.10.2/daemon/graphdriver/devmapper/deviceset.go#L2245-L2277
NOTE: Perhaps no unmounting is needed at all, looking at;
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