Support IPv6

[khuedoan]

Describe the bug

In 2024 IPv6 is not a feature, its absence is a bug.

Current blockers:

• Replace my crappy router
• Cilium L2 announcement doesn't support IPv6 yet
• Ansible inventory management
• Decide between dual-stack or IPv6-only

[khuedoan]

Potential IPv6 issues with Cilium #135 (comment)

[pandabear41]

Potential IPv6 issues with Cilium #135 (comment)

Most issues only involve IPv6 only mode in Cilium and not dual stack.

I generate local IPv6 addresses and my ISP gives me a /60 prefix. I will explore dual stack for my local cluster in the following weeks.

The only hurdle left is L2/NDP with IPv6, which I don't think will be implemented in a while for Cilium. Might need to add back in MetalLB or another LB. I don't have any hardware that supports BGP.

[khuedoan]

Thank you, I look forward to your exploration 😄

My ISP router is pretty unstable with IPv6, so I need to replace it first. I'm building a new OPNsense router, which is another rabbit hole lol