K3s Dynamic IPv6
reddit / selfhosted

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ProfessionalAd3026 · 2023-10-02 22:25

Hey,

I recently set up k3s. I missed the part that dual-stack needs to be
enabled from the [start](https://docs.k3s.io/installation/network-
options?_highlight=ipv6#dual-stack-ipv4--ipv6-networking). I'm
considering recreating it.

I'm migrating from docker-compose.

My IPv6 address is rotating. I run a FritzBox as a router, and prefix
delegation seems to be broken by my ISP. What do I create the service
and pod range with? ULA addresses? How are they going to address the
IPv6 internet? If I get the prefix delegation to work, how would I
renumber the ranges?

I need to have a single IPv6 address reachable to provide native IPv6
connectivity. The current setup drops v6 traffic to node ports.

I thought about patching the metallb I pool dynamically by listening
for ipv6 subnet changes on the node. Alternatively, I can just use a
node port.

Any hints?

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RogerSik · 2023-11-09 07:32

My Solution was to use

```
  hostNetwork: true
```

in the traefik pod. So it will use the ipv6 address of the vm (with
nodeselector so ensure that it gets always attached to the same vm /
ipv6).

But I would also prefer to have a solution with metallb.

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fat-t0ny · 2023-11-18 08:46

Thank you so much, i was on the brink of giving up