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Build Identifier: 

When using an OpenStack-ContainerHost [aarch64] microOS Tumbleweed build (from
https://en.opensuse.org/Portal:MicroOS), cloud-init will fail as it tries to
create a file with a systemd-network UID. Despite NetworkManager being the
microOS 'default', and systemd-network not being installed, cloud-init decides
to create for systemd-networkd 

You do not even need to have a valid cloud-init source for this, the issue will
occur on a 'fresh' system, verified by examining the log files after first boot

----------------------------------------------
2022-09-14 06:54:40,414 - util.py[DEBUG]: Writing to
/etc/systemd/network/10-cloud-init-eth0.network - wb: [644] 69 bytes
2022-09-14 06:54:40,416 - util.py[WARNING]: failed stage init-local
2022-09-14 06:54:40,417 - util.py[DEBUG]: failed stage init-local
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/cloudinit/util.py", line 1430, in
chownbyname
    uid = pwd.getpwnam(user).pw_uid
KeyError: "getpwnam(): name not found: 'systemd-network'"

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 689, in
status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 398, in
main_init
    init.apply_network_config(bring_up=bring_up_interfaces)
[edited for brevity, I will attach the full log separately]
OSError: Unknown user or group: "getpwnam(): name not found: 'systemd-network'"
----------------------------------------------

I built a custom microOS image (see
https://build.opensuse.org/package/revisions/home:mcbridematt:branches:devel:microos:images/openSUSE-MicroOS
) with systemd-network installed and verified this "resolves" the issue.
However, I haven't tried to diagnose why cloud-init wants to use networkd over
NetworkManager.

Reproducible: Always

Steps to Reproduce:
1. Boot a microOS Tumbleweed VM with a cloud-init file (e.g cidata image)
2. Attempt to use system once it reaches the login prompt (for example, using
credentials or SSH keys set in the supplied cloud-config)
Actual Results:  
Login fails because cloud-init did not complete.

No mention of the cloud-init failure is provided to the user at the console
(except maybe the hostname not being configured by cloud-init) , it can only be
discovered by examining the /var partition offline.


The specific image I am using is:
openSUSE-MicroOS.aarch64-16.0.0-OpenStack-Cloud-Snapshot20220911.qcow2