Update k0smotron in standalone cluster

To update a standalone k0smotron cluster, you need to update the k0s version in the YAML configuration file:

1. Localize the configuration of deployed k0smotron cluster in your repository. For example:

   apiVersion: k0smotron.io/v1beta1
   kind: Cluster
   metadata:
     name: k0smotron-test
   spec:
     replicas: 1
     k0sImage: k0sproject/k0s
     version: v1.27.1-k0s.0
   

2. Configure persistence to prevent data loss. For example:

    ---
    apiVersion: controlplane.cluster.x-k8s.io/v1beta1
    kind: K0smotronControlPlane
    metadata:
      name: docker-test-cp
    spec:
      version: v1.27.2-k0s.0
      persistence:
        type: hostPath
        hostPath: "/tmp/kmc-test" # k0smotron will mount a basic hostPath volume to avoid data loss.
   

   Using the hostPath volume type introduces many security risks. Avoid configuring persistence for volumes of the hostPath type. Learn more from official Kubernetes documentation: hostPath.

3. Change all the k0s versions to the target one. For example:

   apiVersion: k0smotron.io/v1beta1
   kind: Cluster
   metadata:
     name: k0smotron-test
   spec:
     replicas: 1
     k0sImage: k0sproject/k0s
     version: v1.28.7-k0s.0 # new k0s version
   

4. Update the resources:

   kubectl apply -f ./path-to-file.yaml
   

The update procedure is completed, you now have the target version of k0smotron.