Section 4: Completing the Migration
With Cluster B running a 3-node HA control plane and all workloads migrated, this section covers the final steps: safely removing the k3s cluster, adding its former node as an RKE2 worker, and reviewing the completed architecture.
- Decommissioning Cluster A and uninstalling k3s from Node 1
- Installing Rocky Linux and joining Node 1 as a dedicated worker node
- Reviewing the final cluster architecture and exploring next steps
The section concludes with a completed migration: a 4-node RKE2 cluster with 3 control plane nodes and 1 worker node, fully replacing the original k3s cluster.
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This is the 4th section of the guide Migrating from k3s to RKE2. Make sure you have completed the previous section before continuing here. The full list of lessons in the guide can be found in the overview.
Getting Started
To get started with the section, head over to the first lesson in this section to learn how to decommission the old cluster and complete the migration.
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