Comment 16 for bug 2004551

We see this in our CI infra as well, it's not just about jammy → lunar dist-upgrades, but also happens with regular updates within lunar as well. The cloud image from a few days ago had an older openssh-server, tried to update to 1:9.0p1-1ubuntu8.4, and failed:

Setting up openssh-server (1:9.0p1-1ubuntu8.4) ...
Creating SSH2 ECDSA key; this may take some time ...
256 SHA256:r08SEQICcnkgu0I1PQwdYTqHeuYVRkz4oPF9VJeC5xQ root@ubuntu (ECDSA)
Creating SSH2 ED25519 key; this may take some time ...
256 SHA256:Qaa3l3IsQuQpKwtESOnfyg5STi64/5pVX4WfiEGX5CI root@ubuntu (ED25519)
rescue-ssh.target is a disabled or a static unit not running, not starting it.
Could not execute systemctl: at /usr/bin/deb-systemd-invoke line 145.
dpkg: error processing package openssh-server (--configure):
 installed openssh-server package post-installation script subprocess returned error exit status 1

Today's cloud image avoids this problem as it has the current openssh-server package on it already, so it's not part of the dist-upgrade. But this will likely come back.

[1] https://cockpit-logs.us-east-1.linodeobjects.com/image-refresh-logs/ubuntu-stable-20230727-131010.log