[Lxc-users] Container start unmounts shared bind mounts
Ivan Vilata i Balaguer
ivan at selidor.net
Thu Feb 9 17:32:03 UTC 2012
Hi all. I'm running Debian's LXC 0.7.5 under Linux 3.2.0. I've set up
a shared mountpoint to dynamically export some host directories into one
container, like this::
# mkdir -p /lxc-shared
# mount --bind /lxc-shared /lxc-shared
# mount --make-unbindable /lxc-shared
# mount --make-shared /lxc-shared
Now I bind mount the host directory under the shared directory::
# mkdir -p /lxc-shared/myvm/foo
# mount --bind /tmp /lxc-shared/myvm/foo
The problem is that whenever I start any container, /lxc-shared/myvm/foo
gets unmounted (even if it has processes working under it!). This
affects bind mounts only if they are under shared mountpoints, e.g. if I
also do this mount on the host::
# mount --bind /tmp /mnt
It survives after starting the container.
Does anyone know why does this happen? Should I file a bug report?
Thanks a lot!
Ivan Vilata i Balaguer -- https://elvil.net/
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