subvolume migration and bluestore encryption

[swiftgist]

Description of Issue/Question

This is specifically on branch 0.8.x currently, but will become an issue on 0.9.x when bluestore encryption is working again there.

The migrate subvolume runner fails with the dmcrypt setup.

The purpose of the runner is placing /var/lib/ceph on its own subvolume when using btrfs on the OS. This will prevent btrfs from including these directories in snapshots.

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In the meantime for those encountering this issue that the command

salt-run fs.correct_var_attrs

is essentially running

chattr -R +C /var/lib/ceph

but excludes /var/lib/ceph/osd

The migration can be completed manually without too much difficulty.