Comment 20 for bug 1775131

Not sure if this will overlap with anyone else, but my experience was a combination of 2 things:

1. Reboots were happening, caused by unattended-upgrade
2. The device causing trouble was a renamed device.

Turns out it was trying to get renamed twice: Once very early in boot from eth1 to eno2, then again based on my neplan from eno2 to the name I wanted. This was failing, and leaving the device down.

See my comment #117 on this issue for more details: https://bugs.launchpad.net/netplan/+bug/1770082