Upgraded from ubuntu 24.04 to 26.04, incus 24.04 VMs & CNs DO get an IP, incus 26.04 VMs get IP but CNs do not

1

after upgrading from ubuntu 24.04 lts to ubuntu 26.04 lts

If I create a new Incus 26.04 VM it does gets an ip address
If I create a new Incus 26.04 CN it does NOT get an ip address
but
If I create a new Incus 24.04 VM it does gets an ip address
If I create a new Incus 24.04 CN it also does get an ip address

using tshark to watch for dhcp requests I

do see incus 24.04 CNs do a dhcp request

32 769.301764870 0.0.0.0 → 255.255.255.255 DHCP 327 DHCP Discover - Transaction ID 0x5a8d6cd0
33 769.323145552 10.167.47.1 → 10.167.47.45 DHCP 355 DHCP ACK - Transaction ID 0x5a8d6cd0

but I see no requests when creating an incus Ubuntu 26.04 CN

anyone have any suggestions what to look for?

2

Probably worth looking at systemctl --failed and networkctl inside the container.

3

@stgraber
Here is the output from those commands from inside the ubuntu 26.04 container

# systemctl --failed
UNIT LOAD ACTIVE SUB DESCRIPTION

0 loaded units listed.
==================================================
# networkctl
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback - unmanaged
6 eth0 ether - unmanaged

2 links listed.

also… fyi
$ incus --version
6.0.5

4

unmanaged eth0 is a bit odd.

That’s a regular Ubuntu image, not a cloud image, right?
Can you check what’s in /etc/systemd/network/?

5

@stgraber

Inside the 26.04 container:

root@cn1:/etc/systemd/network# ls -l
total 0
root@cn1:/etc/systemd/network#

—

I Iaunched the CN using

$ incus launch images:ubuntu/26.04 cn1