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graysky

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From: :wq

Registered: 2008-12-01

Posts: 10,597

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Overlayfs usage with lxc-copy snapshot confusion

I recently began playing with lxc-copy snapshots.  As I understand it, one can keep a "base" container and then snapshot it using overlayfs wherein only the differences are written to the filesystem.  Pretty cool in concept.  So I started to play but am confused why I don't see an overlay in my /proc/mounts ... perhaps I didn't configure it correctly?  I am able to use the "snapshot1" container and it appears as I expect on my filesystem.

# lxc-copy -n base -N snapshot1 -B overlayfs -s
# systemctl start lxc@snapshot1
# grep overlay /proc/mounts
#

The clone's config does reference an overlayfs mount but why is it hidden /proc/mounts?

# grep rootfs /var/lib/lxc/snapshot1/config
lxc.rootfs = overlayfs:/var/lib/lxc/base/rootfs:/var/lib/lxc/snapshot1/delta0
lxc.rootfs.backend = overlayfs

Last edited by graysky (2016-12-23 15:40:29)

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