Get K8 cluster information

Sometimes you need a glance at your cluster with a handy command instead of relying on a fancy dashboard or a heavy monitoring setup. Here are some quick and simple commands to get an overview of your Kubernetes cluster:

kubectl version
Client Version: v1.27.2
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390bf3
Server Version: v1.25.9

$ kubectl cluster-info

  Kubernetes control plane is running at https://example.com:443
  CoreDNS is running at https://example.com:443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
  Metrics-server is running at https://example.com:443/api/v1/namespaces/kube-system/services/https:metrics-server:/proxy
  
  To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

kubectl get componentstatus
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS    MESSAGE   ERROR
controller-manager   Healthy   ok        
scheduler            Healthy   ok        
etcd-0               Healthy   ok        

kubectl api-resources

kubectl get --raw '/healthz'  
ok                                     

kubectl get --raw /version