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

[Dan Bungert]

This will be fixed for 24.04.  I project that a fix to land this week.
Olivier here researched it and opened a MP, we just need to follow
through on that process.

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Title:
  Installation failed when Subiquity installs SSH server on noble

Status in curtin:
  Confirmed
Status in subiquity:
  Confirmed

Bug description:
  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.

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