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https://bugs.launchpad.net/bugs/1668049

Title:
  lxd cannot shutdown container

Status in systemd package in Ubuntu:
  New

Bug description:
  I found this issue when working with lxd and submitted a ticket there
  but the lxc people said it was related to systemd, not lxc.

  The issue is: I have a container running under lxc/lxd. lxc stop of
  the container does not work whereas if I execute "shutdown now" inside
  the container it does stop as expected.

  The associated lxd ticket is here:
  https://github.com/lxc/lxd/issues/2947

  The output of journalctl -a is at the end of this message

  The syslog of that same run can be found here:
  http://paste.ubuntu.com/24071244/

  and this is the output of ps aux:

  USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
  root          1  0.0  0.1  37808  4576 ?        Ss   11:19   0:00 /sbin/init
  root         48  0.0  0.0  35276  3004 ?        Ss   11:19   0:00 
/lib/systemd/systemd-journald
  root         49  0.0  0.0  41724  1912 ?        Ss   11:19   0:00 
/lib/systemd/systemd-udevd
  message+    514  0.0  0.0  42900  2460 ?        Ss   11:19   0:00 
/usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile 
--systemd-activation
  root        704  0.0  0.0  18252  2508 ?        Ss   11:55   0:00 bash
  root        720  0.0  0.0  34556  1992 ?        R+   11:59   0:00 ps aux

  Note that this may be timing related. If I stop the container
  immediately after starting things work. If I stop after a minute or
  so, the stop will not get through. (even not on a 2nd or 3rd attempt).
  However if I leave the container for a while then a new lxc stop will
  terminate the container. (this happened after an hour or so).

  The issue is reproducible but seems to be dependend on what is running
  inside the container.

  container runs ubuntu 16.04 on a 16.04 host.

  systemd --version says:
  systemd 229
  +PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP 
+GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN

  lxc sends SIGRTMIN+3 to systemd to stop. This was apparently discussed
  here: https://github.com/lxc/lxc/issues/1085

  Let me know if more info is needed.

  Frans

  -- Logs begin at Sun 2017-02-26 11:19:12 UTC, end at Sun 2017-02-26 11:23:05 
UTC. --
  Feb 26 11:19:12 D-wan-61-1 systemd-journald[48]: Runtime journal 
(/run/log/journal/) is 8.0M, max 196.7M, 188.7M free.
  Feb 26 11:19:12 D-wan-61-1 systemd-journald[48]: Journal started
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '4 4 1 7' to 
'kernel/printk', ignoring: Permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '176' to 
'kernel/sysrq', ignoring: Permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '1' to 
'fs/protected_symlinks', ignoring: Permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '1' to 
'net/ipv4/tcp_syncookies', ignoring: No such file or directory
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '1' to 
'kernel/kptr_restrict', ignoring: Permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '1' to 
'fs/protected_hardlinks', ignoring: Permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '1' to 
'kernel/yama/ptrace_scope', ignoring: Permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd-sysctl[42]: Couldn't write '65536' to 
'vm/mmap_min_addr', ignoring: Permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: systemd-sysctl.service: Main process 
exited, code=exited, status=1/FAILURE
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to start Apply Kernel Variables.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: systemd-sysctl.service: Unit entered 
failed state.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: systemd-sysctl.service: Failed with 
result 'exit-code'.
  Feb 26 11:19:12 D-wan-61-1 systemd-journald[48]: Forwarding to syslog missed 
1 messages.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Started Uncomplicated firewall.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/ufw.service: Operation not permitted
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Started udev Kernel Device Manager.
  Feb 26 11:19:12 D-wan-61-1 mount[45]: mount: permission denied
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Started Nameserver information manager.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: dev-hugepages.mount: Mount process 
exited, code=exited status=32
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to mount Huge Pages File System.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: dev-hugepages.mount: Unit entered 
failed state.
  Feb 26 11:19:12 D-wan-61-1 systemd-remount-fs[44]: mount: can't find 
LABEL=cloudimg-rootfs
  Feb 26 11:19:12 D-wan-61-1 systemd-remount-fs[44]: /bin/mount for / exited 
with exit status 1.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: systemd-remount-fs.service: Main 
process exited, code=exited, status=1/FAILURE
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to start Remount Root and 
Kernel File Systems.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: systemd-remount-fs.service: Unit 
entered failed state.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: systemd-remount-fs.service: Failed 
with result 'exit-code'.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/systemd-random-seed.service: Operation not perm
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Starting Load/Save Random Seed...
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/systemd-udev-trigger.service: Operation not per
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Starting udev Coldplug all Devices...
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/systemd-journal-flush.service: Operation not pe
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Starting Flush Journal to Persistent 
Storage...
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/cloud-init-local.service: Operation not permitt
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Starting Initial cloud-init job 
(pre-networking)...
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/resolvconf.service: Operation not permitted
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Started Flush Journal to Persistent 
Storage.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Started Load/Save Random Seed.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: lvm2-lvmetad.socket: Trigger limit 
hit, refusing further activation.
  Feb 26 11:19:12 D-wan-61-1 lvm[43]: Daemon lvmetad returned error 104
  Feb 26 11:19:12 D-wan-61-1 lvm[43]: WARNING: Failed to connect to lvmetad. 
Falling back to internal scanning.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: lvm2-lvmetad.socket: Unit entered 
failed state.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Started Monitoring of LVM2 mirrors, 
snapshots etc. using dmeventd or progress polling.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Reached target Local File Systems 
(Pre).
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Reached target Local File Systems.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/system-getty.slice: Operation not permitted
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Created slice system-getty.slice.
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/systemd-tmpfiles-setup.service: Operation not p
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Starting Create Volatile Files and 
Directories...
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Failed to reset devices.list on 
/system.slice/plymouth-read-write.service: Operation not perm
  Feb 26 11:19:12 D-wan-61-1 systemd[1]: Starting Tell Plymouth To Write Out 
Runtime Data...

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