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[Brett Holman <1969526@xxxxxxxxxxxxxxxxxx>]

This bug is believed to be fixed in cloud-init in version 22.2. If this
is still a problem for you, please make a comment and set the state back
to New

Thank you.

** Changed in: cloud-init
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1969526

Title:
  cc-ssh: traceback when openssh-server absent

Status in cloud-init:
  Fix Released

Bug description:
  In minimal cloud images without openssh-server, cloud-init will get
  the following traceback when the following cloud-config is provided:

  ```
  #cloud-config
  ssh_pwauth: true
  ```

  2022-04-19 20:42:32,593 - stages.py[DEBUG]: Running module set-passwords (<module 'cloudinit.config.cc_set_passwords' from '/usr/lib/python3.6/site-packages/cloudinit/config/cc_set_passwords.py'>) with frequency once-per-instance
  2022-04-19 20:42:32,593 - handlers.py[DEBUG]: start: modules-config/config-set-passwords: running config-set-passwords with frequency once-per-instance
  2022-04-19 20:42:32,593 - util.py[DEBUG]: Writing to /var/lib/cloud/instances/rocky-8/sem/config_set_passwords - wb: [644] 24 bytes
  2022-04-19 20:42:32,593 - helpers.py[DEBUG]: Running config-set-passwords using lock (<FileLock using file '/var/lib/cloud/instances/rocky-8/sem/config_set_passwords'>)
  2022-04-19 20:42:32,594 - ssh_util.py[DEBUG]: line 1: option PasswordAuthentication added with no
  2022-04-19 20:42:32,594 - util.py[DEBUG]: Writing to /etc/ssh/sshd_config - wb: [644] 26 bytes
  2022-04-19 20:42:32,594 - subp.py[DEBUG]: Running command ['service', 'sshd', 'restart'] with allowed return codes [0] (shell=False, capture=True)
  2022-04-19 20:42:32,620 - handlers.py[DEBUG]: finish: modules-config/config-set-passwords: FAIL: running config-set-passwords with frequency once-per-instance
  2022-04-19 20:42:32,621 - util.py[WARNING]: Running module set-passwords (<module 'cloudinit.config.cc_set_passwords' from '/usr/lib/python3.6/site-packages/cloudinit/config/cc_set_passwords.py'>) failed
  2022-04-19 20:42:32,621 - util.py[DEBUG]: Running module set-passwords (<module 'cloudinit.config.cc_set_passwords' from '/usr/lib/python3.6/site-packages/cloudinit/config/cc_set_passwords.py'>) failed
  Traceback (most recent call last):
    File "/usr/lib/python3.6/site-packages/cloudinit/stages.py", line 876, in _run_modules
      freq=freq)
    File "/usr/lib/python3.6/site-packages/cloudinit/cloud.py", line 54, in run
      return self._runners.run(name, functor, args, freq, clear_on_fail)
    File "/usr/lib/python3.6/site-packages/cloudinit/helpers.py", line 185, in run
      results = functor(*args)
    File "/usr/lib/python3.6/site-packages/cloudinit/config/cc_set_passwords.py", line 234, in handle
      service_name=cloud.distro.get_option('ssh_svcname', 'ssh'))
    File "/usr/lib/python3.6/site-packages/cloudinit/config/cc_set_passwords.py", line 131, in handle_ssh_pwauth
      subp.subp(cmd)
    File "/usr/lib/python3.6/site-packages/cloudinit/subp.py", line 295, in subp
      cmd=args)
  cloudinit.subp.ProcessExecutionError: Unexpected error while running command.
  Command: ['service', 'sshd', 'restart']
  Exit code: 5
  Reason: -
  Stdout:
  Stderr: Redirecting to /bin/systemctl restart sshd.service
          Failed to restart sshd.service: Unit sshd.service not found.

  While one could argue that cloud images without openssh-server might
  have limited utility, there are use cases for slim apps/micro-services
  that may not rely on this stack and cloud-init should probably cope
  better in the face of this missing dependency.

  While working this issue, let's add a Suggests: openssh-server to
  debian/control for Deb-based systems.


  
  --- Steps to reproduce problem
  cat > ssh_needed.yaml << EOF
  #cloud-config
  ssh_pwauth: true
  EOF

  lxc launch ubuntu-daily:focal f1 -c user.user-data="$(cat ssh_needed.yaml)" 
  lxc exec f1 -- cloud-init status --wait
  lxc exec f1 apt remove opensssh-server
  # reset PasswordAuthentication off again so that cloud-init wants to reset ssh server
  lxc exec f1 --  sed -i 's/PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config
  # force clean reboot so cloud-init reruns
  lxc exec f1 -- cloud-init clean --logs --reboot
  lxc exec f1 -- cloud-init status --wait --long

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