[Bug 2056570] [NEW] Installation failed when Subiquity installs SSH server on noble

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You have been subscribed to a public bug by Dan Bungert (dbungert):

I'm trying to install Ubuntu Server 24.04 using today's daily + changes
related to deb822. I'm using the following curtin revision:

https://git.launchpad.net/~ogayot/curtin/commit/?id=2ac55b7f594c5e73891e04a11ebcf9b1f7ec9e3e

Subiquity fails when installing openssh-server. Unfortunately, the logs
do not help much to understand what's going on:

Mar 08 13:39:08 ubuntu-server subiquity_log.1547[11562]: system install failed for ['openssh-server']: Unexpected error while running comma>
Mar 08 13:39:08 ubuntu-server subiquity_log.1547[11562]: Command: ['unshare', '--fork', '--pid', '--mount-proc=/target/proc', '--', 'chroot>
Mar 08 13:39:08 ubuntu-server subiquity_log.1547[11562]: Exit code: 100
Mar 08 13:39:08 ubuntu-server subiquity_log.1547[11562]: Reason: -
Mar 08 13:39:08 ubuntu-server subiquity_log.1547[11562]: Stdout: ''
Mar 08 13:39:08 ubuntu-server subiquity_log.1547[11562]: Stderr: ''

I've added more logs to see what happens (see
https://code.launchpad.net/~ogayot/curtin/+git/curtin/+merge/462051) and
now I can see that dpkg fails during the postinst script:

Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]: Stderr: perl: warning: Setting locale failed.
[...]
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         Creating config file /etc/ssh/sshd_config with new version
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         Creating SSH2 RSA key; this may take some time ...
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         3072 SHA256:tXx12vlm+iJZZUZzitch0ZdmXdYpmjw2eFG+vBmizWo root at ubuntu-server>
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         Creating SSH2 ECDSA key; this may take some time ...
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         256 SHA256:aTGgNLJcS/gjoXyDbZGGw8Bksjm/ENHOcWwER6hZOYQ root at ubuntu-server >
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         Creating SSH2 ED25519 key; this may take some time ...
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         256 SHA256:MZmITjwhkmfqHyu/U3x68Y9yw48UgJTfLAriavFznv4 root at ubuntu-server >
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         Failed to connect to bus: No data available
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         dpkg: error processing package openssh-server (--configure):
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:          installed openssh-server package post-installation script subprocess retu>
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         Errors were encountered while processing:
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:          openssh-server
Mar 08 14:51:10 ubuntu-server subiquity_log.1547[10961]:         E: Sub-process /usr/bin/dpkg returned an error code (1)

After adding set -x to the postinst script, we see that it is the call
to systemctl daemon-reload which causes the failure:

        + [ -d /run/systemd/system ]
        + systemctl daemon-reload
        Failed to connect to bus: No data available
        + cleanup
        + [ /tmp/tmp.iebuhpLhg7 ]
        + rm -f /tmp/tmp.iebuhpLhg7
        + [  ]
        dpkg: error processing package openssh-server (--configure):
         installed openssh-server package post-installation script subprocess returned error exit status 1
        Errors were encountered while processing:
         openssh-server
        E: Sub-process /usr/bin/dpkg returned an error code (1)

I think it is a regression introduced by
https://code.launchpad.net/~mitchellaugustin/curtin/+git/curtin/+merge/460960
but I have to confirm.

** Affects: curtin
     Importance: Undecided
         Status: Confirmed

** Affects: subiquity
     Importance: Critical
         Status: Confirmed

-- 
Installation failed when Subiquity installs SSH server on noble
https://bugs.launchpad.net/bugs/2056570
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