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| author | Alban Crequy <alban.crequy@gmail.com> | 2015-09-18 13:37:34 +0200 |
|---|---|---|
| committer | Alban Crequy <alban.crequy@gmail.com> | 2015-09-21 17:32:45 +0200 |
| commit | 287419c119ef961db487a281162ab037eba70c61 (patch) | |
| tree | e7f4c01e50b7b944b9d9d0ed8290ead8762da906 /units/exit.target | |
| parent | a1b7a5bbdd8da94e41b5e79be7a6e853ae910d2b (diff) | |
containers: systemd exits with non-zero code
When a systemd service running in a container exits with a non-zero
code, it can be useful to terminate the container immediately and get
the exit code back to the host, when systemd-nspawn returns. This was
not possible to do. This patch adds the following to make it possible:
- Add a read-only "ExitCode" property on PID 1's "Manager" bus object.
By default, it is 0 so the behaviour stays the same as previously.
- Add a method "SetExitCode" on the same object. The method fails when
called on baremetal: it is only allowed in containers or in user
session.
- Add support in systemctl to call "systemctl exit 42". It reuses the
existing code for user session.
- Add exit.target and systemd-exit.service to the system instance.
- Change main() to actually call systemd-shutdown to exit() with the
correct value.
- Add verb 'exit' in systemd-shutdown with parameter --exit-code
- Update systemctl manpage.
I used the following to test it:
| $ sudo rkt --debug --insecure-skip-verify run \
| --mds-register=false --local docker://busybox \
| --exec=/bin/chroot -- /proc/1/root \
| systemctl --force exit 42
| ...
| Container rkt-895a0cba-5c66-4fa5-831c-e3f8ddc5810d failed with error code 42.
| $ echo $?
| 42
Fixes https://github.com/systemd/systemd/issues/1290
Diffstat (limited to 'units/exit.target')
| -rw-r--r-- | units/exit.target | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/units/exit.target b/units/exit.target new file mode 100644 index 0000000000..f5f953d112 --- /dev/null +++ b/units/exit.target @@ -0,0 +1,17 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Exit the container +Documentation=man:systemd.special(7) +DefaultDependencies=no +Requires=systemd-exit.service +After=systemd-exit.service +AllowIsolate=yes + +[Install] +Alias=ctrl-alt-del.target |