Upgrade to Ubuntu 22.04

[jefflill]

Podman installation is messed up right now. The official documentation implies that Ubuntu 20.04 is no longer supported and that Podman is now available for Ubuntu 20.10 or greater:

containers/podman#14302

I tried to to hack around this by forcing an install from Kubic using hardcoded keys (dangerous). This installs an old Podman version v3.0.1. Note that podman-rootless is not available! This is a huge problem.

[jefflill]

We may need to upgrade to Ubuntu 22.04, but after some investigation, this gets worse:

• podman is present in the official Ubuntu 22.04 package releases but podman-rootless is not. I need to investigate whether rootless is a mode now, not a separate binary.

• cri-o is not present in the Ubuntu 22.04 package releases and the Kubic setup instructions for 22.04 aren't working.

I'd really rather not upgrade to Ubuntu 22.04 right now because I suspect this could really destabilize cluster setup and perhaps cluster operation, beside probably taking a few days to complete the upgrade.

[jefflill]

Can figure out a way to install podman-rootless on Ubuntu 22.04?

Observations:

• It looks like the stock podman binary may also be able top operated in rootless mode. I don't see any confutation setting to control this, but I suspect that just executing podman as a non-root user will start it in rootless mode.
• Although we've been installing podman-rootless I don't believe we've been actually using this feature:
  • There are several setup prerequisites that we're not configuring rootless prerequsites.
  • All of our current calls to podman are happening as root
  • Kubernetes is calling CRI-O directly, so rootless podman doesn't matter

Can we install CRI-O on Ubuntu 22.04?

Observations:

• The installation instructions look to be slightly out of date: Provide packages for Ubuntu 22.04 Jammy Jellyfish cri-o/cri-o#5838 (comment), but it works with: $OS=xUbuntu_22.04

Conclusion:

It looks like we can install what we need on Ubuntu 22.04.

Although, I would have preferred not to upgrade to Ubuntu 22.04, podman is fully supported there and I'm really tired of fighting with podman and CRI-O and this will get us onto the latest Ubuntu release which will be nice.

Additional potential issues:

• Image availability:
  • AWS
  • Azure

[jefflill]

Ubuntu 22.04 upgrade:

We'll start out with Hyper-V images because that environment has the fasted turn around.

• Hyper-V
  • Build base image
  • Build node image
  • Verify install
• XenServer
  • Build base image
  • Build node image
  • Verify install
• AWS
  • Build base image
  • Build node image
  • Verify install
• Azure
  • Build base image
  • Build node image
  • Verify install

[jefflill]

DONE