The current Ubuntu/Xenial guest image on our new LXD container host contained too many packages.
It held the
lxd package and a bunch of
lxc packages. They are not
needed on the container guest. At some point before or after removing
them, for some reason the ZFS container got unmounted.
This went unnoticed until I tried a reboot:
guest# reboot lxd# lxc exec guest /bin/bash error: Container is not running. lxd# lxc start guest error: Error calling 'lxd forkstart guest /var/lib/lxd/containers /var/log/lxd/guest/lxc.conf': err='exit status 1' Try `lxc info --show-log guest` for more info lxd# lxc info --show-log guest ... lxc 20160323093357.449 ERROR lxc_conf - conf.c:mount_rootfs:806 - No such file or directory - failed to get real path for '/var/lib/lxd/containers/guest/rootfs' lxd# zfs list -o name,mounted | grep guest data/containers/guest no lxd# zfs mount data/containers/guest
Now the guest was able to start again.
Next up, the Ubuntu/Xenial refused to reboot because the
would hang during shutdown. A quick workaround was to append this last
# The primary network interface auto eth0 iface eth0 inet dhcp pre-down /usr/bin/pkill -9 dhclient
Now the reboot worked as intended.
Interestingly, when trying to reproduce both issues on the 23rd of March, I couldn't with the latest Ubuntu/Xenial image. It looks like at least one of the issues got fixed. Good job, LXC people!