Get the list of available Kubernetes versions for RKE

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Environment

RKE 1.3+

Rancher 2.6.x+

Situation

One wants to install an RKE cluster without the default version of RKE or the Kubernetes version is not listed on the Rancher UI

Resolution

1. For RKE CLI:
Through the RKE CLI, one might get the available versions of Kubernetes for that release:

$ rke config --list-version --all

Without the flag --all it will display the default version of the Kubernetes to be installed if the version is not specified on the cluster.yml. Documentation on how to do it can be found here .

1.1 To get the system images available, e.g. core-dns or calico, use:

# for the current k8s version
$ rke config --system-images
# for a specific k8s version
$ rke config --system-images --version v1.24.13-rancher2-1
# for all available k8s on the rke distribution
$ rke config --system-images --all

Note: the information is also available on the RKE release page: https://github.com/rancher/rke/releases/

2. For RKE Kubernetes versions available on Rancher, check the RKE k8s System Images resource:

kubectl get rkek8ssystemimages.management.cattle.io --namespace cattle-global-data

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