network screen fails to show IP when netbooted

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1914469

Hmm. Can you attach /var/log/installer/subiquity-server-debug.log?

Sorry for the slow response. So the reason the addresses aren't showing up in the UI is that they are "permanent" in the sense of IFA_F_PERMANENT which is not what the code expects for an address received via DHCP. What component is actually doing the DHCPing? Is it or the installer wrong? :)

The installer is doing the DHCP'ing, there's nothing strange going on there. I do know that this platform has a non-conventional networking architecture - maybe there's some mismatched assumptions there.

Hm strange. Can you attach the journal? Not sure how verbose networkd is by default, if there's anything you know of to make it more verbose, please do that too :)

I netbooted, created an /etc/systemd/system/systemd-networkd.service.d/10-debug.conf:
[Service]
Environment=SYSTEMD_LOG_LEVEL=debug

restarting systemd-networkd and captured the attached journal.

For some reason this bug always falls away from my attention, sorry.

If you netboot it's not networkd assigning the addresses? I'm not sure where the output from the initramfs ends up but it's not in the journal, can you reproduce and attach dmesg maybe?

There is one thing odd in the logs though:

Apr 09 18:48:03 ubuntu-server systemd-networkd[3059]: enP2p1s0v0: Remembering foreign address: 10.229.66.189/16 (valid forever)

It's strange for a dhcp allocated address to be valid forever. Unfortunately networkd doesn't log the address flags in this situation.

Oh wait, this seems to happen for all netboots (at least currently) :( I think it's because of the think I mentioned in comment #10: the busybox ip command does not support the valid_lft flag, and the kernel sets the IFA_F_PERMANENT flag on any address without a lifetime, and then subiquity assumes it was manually assigned vs arriving via DHCP.

Oh heh looks like this is fixed in busybox upstream! https://git.busybox.net/busybox/commit/?id=8a485b0a363935309f976866b8a30988362fadc0

Not sure when that will make it's way into Ubuntu though.