Question About Floating IP Setup and Possible Downtime

[ZiedChekir]

I have a cluster running critical services, and I’m using a service that requires a fixed IP. I read this guide: https://github.com/vitobotta/hetzner-k3s/blob/main/docs/Floating_IP_egress.md

I just want to confirm whether following this approach will cause any downtime, since it involves modifying networking and adding a new node to the cluster. I’ve never done this before, and I want to be sure everything stays stable because the cluster is running critical workloads.

[vitobotta]

I am afraid I can't say whether it's doable or not because I have never attempted replacing a CNI with another one. I would recommend setting up a test cluster with the same config as your production cluster and some realistic workloads on it, and then try replacing the CNI to see if it works. One thing I am pretty certain of is that - if it works - it will definitely cause downtime.

[ZiedChekir]

Thank you for ur response. I have tried this on a test cluster and yes we had downtime so we ended up creating a proxy machine for this service (easier setup and zero risk ). I just wanted to give u my feedback on this approach. Thank you so much for ur help 🙏

[vitobotta]

Glad you found a solution 👍