juju agent fails to start on focal

[Richard Harding]

during bootstrap, add-machine, deploy Juju fails on Focal due to systemd not finding the service.

ll /etc/systemd/system
jujud-machine-1.service -> /lib/systemd/system/jujud-machine-1/jujud-machine-1.service

which is linked and calls

ExecStart=/lib/systemd/system/jujud-machine-1/exec-start.sh

The fact that it's in a jujud-machine-1 folder vs /system itself appears to be causing systemd to not be able to run it.

[Richard Harding (rharding)]

$ systemctl --version
systemd 244 (244-3ubuntu1)
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=hybrid
ubuntu@juju-e7323e-1:/etc/systemd/system$ systemctl status jujud-machine-1
Unit jujud-machine-1.service could not be found.

ubuntu@juju-e7323e-1:/etc/systemd/system$ ls -latr /etc/systemd/system/jujud-machine-1.service
lrwxrwxrwx 1 root root 59 Jan 21 12:21 /etc/systemd/system/jujud-machine-1.service -> /lib/systemd/system/jujud-machine-1/jujud-machine-1.service

[Richard Harding (rharding)]

After discussing with the team and getting guidance from folks that know systemd better we're going to write out files just to /etc/systemd/system for our agents and mongodb services. We'll need to also make sure that we have a series-upgrade step for OS's that get dist-upgraded to focal and have existing agent files on disk.

[Joseph Phillips (manadart)]

Can we get some reproduction detail?

I can't specify focal as bootstrap-series on LXD (no image found) or MAAS (doesn't start an instance, though I did add 20.04 to the image list.

[Joseph Phillips (manadart)]

Nevermind need to use the daily image stream.

[Joseph Phillips (manadart)]

Initial patch for support in 2.7 is here:
https://github.com/juju/juju/pull/11147

Other patches for upgrade paths will follow.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Joseph Phillips (manadart)]

Upgrade steps:
https://github.com/juju/juju/pull/11159

[Balint Reczey (rbalint)]

There seems to be nothing related to fix in systemd.