If systemd's tmpfiles.d timer is executed while lorax is running it will
remove any files and directories older than 30 days. This is what has
been causing the occasional error where /proc/ would seem to vanish
during the install.
Upstream has proposed this solution, https://github.com/systemd/systemd/pull/11482
but until that is released we need a work-around to protect the lorax
files.
This commit does several things:
* Move the default tmpdir from /var/tmp/ to /var/tmp/lorax/
* Add a lorax.conf tmpfiles.d file that prevents systemd-tmpfiles from
removing anything under /var/tmp/lorax/
* Add an exit handler to lorax so that temporary directories are removed on
exit or on a python traceback.
* Use flock to lock access to the tempdir while lorax is running.
* Remove any unlocked tempdirs named /var/tmp/lorax/lorax.* at startup
Note that the exit handler will not remove the tempdir if lorax is
killed with a signal -- those are being caught by dnf and prevent the
exit handler from running.
systemd-tmpfiles cannot clean up the tempdirs at boot time because they
contain files labeled as shadow_t, so we have to remove those when lorax
runs. It uses the flock to prevent removing any directories created by
parallel instances of lorax and only removes ones that are unlocked.
Worst case they will be around until the first run of lorax after a
reboot.
If you want to keep the working directory around for debugging purposes
use --workdir /var/tmp/lorax/my-workdir and it won't be removed by
lorax.
Resolves: rhbz#1668408
Here's a bash_completion file for composer-cli! It completes known
commands, subcommands, and flags, plus arguments to flags that take
arguments, and if you've got write access to the socket it'll also
autocomplete:
* source names for commands that need source names
* blueprint names for commands that take blueprint names
* compose uuids for commands that take compose uuids
* intelligently only suggests appropriate uuids - e.g. only
suggests uuids of running composes for "compose cancel"
NOTE: bash completion scripts are horrible and this is no exception.
Please forgive me.
We only have qemu-kvm available, so use that. This also means that there
will not me any support for using qemu with arches that are different
from the host.
This also sets ownership of /var/lib/lorax/composer/ to root:weldr to
allow missing directories to be created at runtime.
(cherry picked from commit f38f5cc168)
