Live migration CNI to cilium

[itmwiw]

Hello,
I would like to know if it is possible to migrate existing OKD clusters to cilium cni. In the documentation, I only found how to migrate between OpenshiftOVN and OpenshiftSDN, but nothing about third party CNIs.
Can you help me with this?
Thanks

[SISheogorath]

Looking into the details of how the migrations work, it's currently not supported by CNO to migrate to other SDNs than the ones mentioned.

However, jetstack has layed down how they migrated to cilium in a detailed blog post using multus. And multus is already part of OpenShift.

https://www.jetstack.io/blog/cni-migration/

They even put the whole thing in code: https://github.com/jetstack/cni-migration

While I wouldn't recommend to throw this CLI at OpenShift, I would recommend to dive into the details and try to.migrate based on the knowledge (and maybe contribute OpenShift support).

[vrutkovs]

Check out this guide - https://veducate.co.uk/migrate-red-hat-openshiftsdn-ovn-kubernetes-cilium/