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

[Alex Wang]

All right, we are also hitting this error with user-data automation
methodology which used to work on Ubuntu 22.04. May we know is there any
workaround for this or we simply have to wait for new ISO to include the
fix? Thanks a lot.

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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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