I'm seeing this in a number of test runs from last night fail against R71-11086 with similar signatures like this:
2018-09-21T09:24:13.787160-07:00 INFO VM(3)[20540]: lxd[119]: action=start created=2018-09-21T16:21:22+0000 ephemeral=false lvl=info msg="Starting container" name=penguin stateful=false t=2018-09-21T16:24:10+0000 used=1970-01-01T00:00:00+0000#012
2018-09-21T09:24:13.940837-07:00 INFO vm_cicerone[20541]: Received SetUpLxdContainerUser request
2018-09-21T09:24:14.298835-07:00 INFO VM(3)[20562]: [ 288.345722] new mount options do not match the existing superblock, will be ignored#015
2018-09-21T09:24:18.788824-07:00 INFO VM(3)[20540]: lxd[119]: action=start created=2018-09-21T16:21:22+0000 ephemeral=false lvl=info msg="Started container" name=penguin stateful=false t=2018-09-21T16:24:13+0000 used=1970-01-01T00:00:00+0000#012
2018-09-21T09:24:18.788833-07:00 INFO VM(3)[20540]: tremplin[140]: 2018/09/21 16:24:13 Received SetUpUser RPC: penguin (username testuser)#012
2018-09-21T09:24:28.960613-07:00 ERR vm_cicerone[20541]: SetUpUser RPC failed: Deadline Exceeded
2018-09-21T09:24:29.813115-07:00 INFO vm_concierge[20550]: Shutting down due to SIGTERM
Comment 1 by jkardatzke@chromium.org
, Sep 21