The IP address on resolv.conf is expected, because systemd is what’s managing DNS. So if you do:
It should show you the DNS server that’s actually using; as such, I don’t think the issue has to do with the internet.
That said, to commission, the machine needs access to the Ubuntu archive, and by default, it uses the MAAS internal proxy to access it. So the issue could be related to do. Is there any chance you can post the following logs:
- /var/log/maas/rsyslog///messages # from the time it commissions.
- /var/log/cloud-init*.log : From the commissioning environment on the machine itself.
Also, please check the proxy logs on the controller(s):