ci: migrate actions runners off ubuntu 20.04 #2163
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GitHub actions will be deprecating the 20.04 image on 2025-04-01[1]. Let's move to ubuntu-24.04. [1] https://github.com/actions/runner-images/issues/ 11101
Running LXD and Docker on the same host has known connectivity issues. This caused CI failures when transitioning the GitHub action runner images from ubuntu-20.04 to ubuntu-24.04. The LXD documentation has a few recommended workarounds[1] and this one is the only one that worked well with GitHub CI. [1] https://documentation.ubuntu.com/lxd/en/latest/howto/network_bridge_firewalld/#prevent-connectivity-issues-with-lxd-and-docker
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During some testing today I got a notification that GitHub actions will be deprecating the 20.04 image on 2025-04-01[1] so let's migrate away. Unless we have any reason to use the oldest supported version, let's start using
ubuntu-latestubuntu-24.04. It looks like we were on 22.04 but moved back to 20.04 because of setup issues[2], which I believe I was able to replicate and fix here.The problem: The GitHub Actions runner images have Docker pre-installed and connectivity issues with LXD and Docker both installed on a system is a known issue[3]. Though I don't know why the previously used
ubuntu-20.04images didn't have this issue even though they also have Docker installed. I'll also note that I did try the "simpler" solution in [3] but for whatever reason I couldn't get that work.[1] actions/runner-images#11101
[2] #1852
[3] https://documentation.ubuntu.com/lxd/en/latest/howto/network_bridge_firewalld/#prevent-connectivity-issues-with-lxd-and-docker