Identify RKE / Rancher Launched Kubernetes / Imported clusters

identify_rke_rancherlaunched_imported.md

Identify RKE / Rancher Launched Kubernetes / Imported clusters

This will describe how to identify clusters that are created by RKE, created by Rancher or managed by Rancher

RKE

Clusters created by RKE CLI have:

• Cluster state stored as Configmap called full-cluster-state in namespace kube-system (cluster-state before RKE v0.2.0)
  • kubectl -n kube-system get configmap full-cluster-state
• No cattle-system namespace
• No ServiceAccount named kontainer-engine in namespace cattle-system

Rancher Launched Kubernetes

Clusters created as described on https://rancher.com/docs/rancher/v2.x/en/cluster-provisioning/rke-clusters/ have:

• ServiceAccount named kontainer-engine in namespace cattle-system
  • kubectl -n cattle-system get sa kontainer-engine
• Cluster state stored as Configmap called full-cluster-state in namespace kube-system (cluster-state before Rancher v2.2.0)
  • kubectl -n kube-system get configmap full-cluster-state
• Deployment cattle-cluster-agent and DeamonSet cattle-node-agent in namespace cattle-system
  • kubectl -n cattle-system get deploy cattle-cluster-agent
  • kubectl -n cattle-system get ds cattle-node-agent

Hosted Kubernetes

• ServiceAccount named kontainer-engine in namespace cattle-system
  • kubectl -n cattle-system get sa kontainer-engine
• No cluster state stored as Configmap called full-cluster-state in namespace kube-system

Imported clusters

• Deployment cattle-cluster-agent and DeamonSet cattle-node-agent in namespace cattle-system
  • kubectl -n cattle-system get deploy cattle-cluster-agent
  • kubectl -n cattle-system get ds cattle-node-agent
• No ServiceAccount named kontainer-engine in namespace cattle-system