We deployed an RKE cluster on 8 large nodes (512GB Ram and 64 CPU cores) using CANAL as the CNI.
In it’s default configuration, each host get’s configured with a FLANNEL_SUBNET=10.x.x.x/24.
We’d like to change this to LANNEL_SUBNET=10.x.x.x/22. (increase cidr size).
How can this be accomplished?
Can this be changed after a cluster has already been deployed?
We already increased the “max_pods” value for kubelet to accomodate more containers per host.
The goal is for this cluster to be able to comfortably run 2000+ containers.