Comment 0 for bug 1623570

When bringing up the Azure datasource in cloud-init.service, cloud-init tries 'service start walinuxagent'.

That previously worked fine, and the agent would start and then would produce the certificate files that cloud-init needed (for ssh keys and things).

Now, however we see a log like:
Sep 14 14:53:18 smoser0914x [CLOUDINIT] DataSourceAzure.py[DEBUG]: Getting metadata via agent. hostname=smoser0914x cmd=['service', 'walinuxagent', 'start']
Sep 14 14:53:18 smoser0914x [CLOUDINIT] util.py[DEBUG]: Running command hostname with allowed return codes [0] (shell=False, capture=True)
Sep 14 14:53:18 smoser0914x [CLOUDINIT] DataSourceAzure.py[DEBUG]: invoking agent: ['service', 'walinuxagent', 'start']
Sep 14 14:53:18 smoser0914x [CLOUDINIT] util.py[DEBUG]: Running command ['service', 'walinuxagent', 'start'] with allowed return codes [0] (shell=False, capture=True)
Sep 14 14:53:18 smoser0914x [CLOUDINIT] util.py[WARNING]: agent command '['service', 'walinuxagent', 'start']' failed.
Sep 14 14:53:19 smoser0914x [CLOUDINIT] util.py[DEBUG]: agent command '['service', 'walinuxagent', 'start']' failed.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/sources/DataSourceAzure.py", line 145, in get_metadata_from_agent
    invoke_agent(agent_cmd)
  File "/usr/lib/python3/dist-packages/cloudinit/sources/DataSourceAzure.py", line 452, in invoke_agent
    util.subp(cmd, shell=(not isinstance(cmd, list)))
  File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1832, in subp
    cmd=args)
cloudinit.util.ProcessExecutionError: Unexpected error while running command.
Command: ['service', 'walinuxagent', 'start']
Exit code: 1
Reason: -
Stdout: ''
Stderr: "
  Failed to start walinuxagent.service: Transaction order is cyclic. See system logs for details.
  See system logs and 'systemctl status walinuxagent.service' for details

I believe the relevant change is in 34a26f7f
  https://git.launchpad.net/cloud-init/commit/?id=34a26f7f59f2963691e36ca0476bec9fc9ccef63
That added multi-user.target to the list of After for cloud-init-final.service.