Kubernetes.md

Tips for Kubernetes configuration and triage

issue: connection was refused

root@control:~# kubectl get --all-namespaces services The connection to the server localhost:8080 was refused - did you specify the right host or port?

Solution:

Environment variable KUBECONFIG must be set explicit

$ sudo cp /etc/kubernetes/admin.conf $HOME/
$ sudo chown $(id -u):$(id -g) $HOME/admin.conf
$ export KUBECONFIG=$HOME/admin.conf

List Master nodes

$ kubectl get nodes --selector='node-role.kubernetes.io/master'

List worker nodes

$ kubectl get nodes --selector='!node-role.kubernetes.io/master'