Upgrade to Ubuntu 22.04.3 (for Kernel 6.2)

[jefflill]

Cilium/Isto interoperability requires the socketLB.hostNamespaceOnly=true capability which requires Kernel 5.7 or greater. I see that Ubuntu released 22.04.3 Aug 2023, which includes Kernel 6.2, so we'll go for that.

https://www.solo.io/blog/istio-cilium-kube-proxy-replacement/

We'll need to rebuild all of the base images. Note that we'll need to identify these specific Ubuntu images for AWS and Azure.

• AWS
• Azure
• Hyper-V
• XenServer

[jefflill]

DONE: note that AWS/Azure already use the latest Ubuntu 22.04 images

[jefflill]

It turns out that Ubuntu 22.04.3 release doesn't install the Linux Kernel v6.2 by default. We need to:

apt-get update
apt-get install --install-recommends linux-image-generic-hwe-22.04=6.2.0.39.40~22.04.16

where we'll pin the kernel version via the "=6.2.0.39.40~22.04.16". Note that these versions are listed here:

https://packages.ubuntu.com/jammy/linux-generic-hwe-22.04

...we'll also need to reboot

[jefflill]

REALLY DONE