Is it possible to update the Cluster (Pod) CIDR or Service CIDR for an RKE, RKE2, or K3s cluster?

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Environment

An RKE, RKE2, or K3s cluster

Situation

The Cluster (Pod) CIDR (default 10.42.0.0/16) and Service CIDR (default 10.43.0.0/16) ranges for a cluster can be specified in the cluster configuration when launching an RKE, RKE2, or K3s cluster, whether provisioned directly or via Rancher v2.x. Is it possible to change these values after the cluster has been provisioned?

Resolution

Updating either the Cluster (Pod) CIDR or Service CIDR after the cluster has been provisioned is not supported and you should be careful to set these as required when first configuring the cluster.

Disclaimer

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