We have a problem with one of our (RKE) Clusters, which was created by using Rancher “Add Cluster → Existing Nodes”.
Some months ago, due to a combination of unfortunate circumstances, the Rancher + the target cluster got unresponsive.
After setting up a new Rancher cluster, the isolated target cluster got reintegrated as external cluster.
This works quite nice, but now some important features are not possible anymore, like:
- Updating the Kubernetes version
- Adding new nodes
- Is is somehow possible to reintegrate the target cluster as RKE-Cluster to make it fully manageable (without having to set it up again)?
If this is not possible:
- do you have advice for the best way to proceed? Do you know any tool to fetch
all required manifests from the cluster to re-use it on a new cluster?
- how can I handle updates, adding nodes etc. via the target cluster commandline?
Thanks in advance.
Technical Note: Rancher version is 2.5.2