no IP address found for Ubuntu VM

[barkingfoodog]

I'm running tart 2.18.4 on macOS Sequoia 15.0. Tart works fine with a macOS image, and I'm trying to get an Ubuntu VM going for the first time.

I followed the basic steps from https://tart.run/quick-start/:

tart clone ghcr.io/cirruslabs/ubuntu:latest ubuntu
tart set ubuntu --disk-size 50
tart run ubuntu

The VM downloads, boots up, and I can log into through the tart GUI. However, I'm unable to get the VM IP using tart ip ubuntu. Instead I get:

no IP address found

I found #632 and tried the workaround from #657 but that doesn't help. After clearing /var/db/dhcpd_leases and restarting the VM I get output that looks legit in /var/db/dhcpd_leases:

{
	name=ubuntu
	ip_address=192.168.64.2
	hw_address=ff,f1:f5:dd:7f:0:2:0:0:ab:11:b5:58:a4:8e:38:af:82:b9
	identifier=ff,f1:f5:dd:7f:0:2:0:0:ab:11:b5:58:a4:8e:38:af:82:b9
	lease=0x66fa772c
}

This matches the IP inside the VM (confirmed using ifconfig).

I have an OpenVPN Connect VPN running, but disabling it doesn't seem to make any difference. I don't have any issues getting the IP address from a macOS VM running under tart.

Any compatibility issues with macOS 15 or other troubleshooting ideas for how to get tart ip ubuntu returning the VM's IP address?

[edigaryev]

Looks like a bug in the macOS DHCP server:

It uses the client ID not just in the identifier= field, but also in hw_address= field, yet this field's name hints that it should only contain a MAC-address.

I've created cirruslabs/linux-image-templates#38 to address this in our Linux VM images.

[barkingfoodog]

Thank you! I'll watch for the next Linux VM build and confirm the fix before closing this.

[barkingfoodog]

@edigaryev I saw new builds come through a couple days ago at https://github.com/cirruslabs/linux-image-templates/pkgs/container/ubuntu. I pulled a fresh copy of the 22.04 image and I'm still not getting an IP from tart ip ubuntu.

Should those images have the fix from cirruslabs/linux-image-templates#38?

[edigaryev]

@barkingfoodog my bad, I was testing the fix on the initial boot, which still used the network-config provided to the Cloud Init.

I've created cirruslabs/linux-image-templates#39 to fix this and will initiate a re-build of base images once it gets merged 🙌

[edigaryev]

Should work now, tested with the latest versions of:

• ghcr.io/cirruslabs/ubuntu:latest
• ghcr.io/cirruslabs/ubuntu:24.04
• ghcr.io/cirruslabs/debian:latest
• ghcr.io/cirruslabs/fedora:latest (AFAIR this one worked before the fix)

[barkingfoodog]

@edigaryev I can confirm this works now with ghcr.io/cirruslabs/ubuntu:latest using Tart 2.18.4 on macOS Sequoia 15.0.1. Thank you!

[GregOriol]

Thank you for documenting this: it helped me with utmapp/UTM#3294