Comment 0 for bug 1635639

Curtis Hovey (sinzui) wrote :

The s390x host used to Juju testing spontaneously broke today.
The disk filled up, we restarted so that we could remove unused
kernels. We discovered that lxc1 cannot create containers any more.

$ sudo lxc-create -t ubuntu-cloud -n curtis -- -r xenial -a s390x

$ sudo lxc-start -o lxc.log -n curtis
lxc-start: tools/lxc_start.c: main: 344 The container failed to start.
lxc-start: tools/lxc_start.c: main: 346 To get more details, run the container in foreground mode.
lxc-start: tools/lxc_start.c: main: 348 Additional information can be obtained by setting the --logfile and --logpriority options.

$ cat lxc.log
      lxc-start 20161020121833.069 ERROR lxc_seccomp - seccomp.c:get_new_ctx:224 - Seccomp error -17 (File exists) adding arch: 15
      lxc-start 20161020121833.069 ERROR lxc_start - start.c:lxc_init:430 - failed loading seccomp policy
      lxc-start 20161020121833.069 ERROR lxc_start - start.c:__lxc_start:1313 - failed to initialize the container
      lxc-start 20161020121838.075 ERROR lxc_start_ui - tools/lxc_start.c:main:344 - The container failed to start.
      lxc-start 20161020121838.075 ERROR lxc_start_ui - tools/lxc_start.c:main:346 - To get more details, run the container in foreground mode.
      lxc-start 20161020121838.075 ERROR lxc_start_ui - tools/lxc_start.c:main:348 - Additional information can be obtained by setting the --logfile and --logpriority options.

# <stgraber> sinzui: checking when s390x seccomp support was added to the
# kernel, to see if it's just a missing config in our kernel that'd fix that
# cleanly or if we'd need it backported to 4.4 which would be a bit more
# annoying
# <stgraber> sinzui: config-4.4.0-45-generic is what you're running right?
# <sinzui> stgraber uname-a says 4.4.0-45-generic
# stgraber> sinzui: you can workaround it by putting a file
# with lxc.seccomp=
# in /usr/share/lxc/config/common.conf.d/, that should get you going again

WORK AROUND
# on the s390x-slave
sudo vim /usr/share/lxc/config/common.conf.d/10-secomp-hack.conf
$ cat /usr/share/lxc/config/common.conf.d/10-secomp-hack.conf
# Advised to stgraber to add this file after seeing lxc-start fail with
# lxc-start 20161020121833.069 ERROR lxc_seccomp - seccomp.
lxc.seccomp=