Commands cheat sheet

Get shell on node with debug pod

kubectl debug node/<node-name> -it --image=<image name>

kubectl debug --image=alpine --namespace=<namespace> node/<node-name> --attach=true --stdin=true --tty -- sh

Node taint NoSchedule

Add

kubectl taint nodes node1 key1=value1:NoSchedule

Remove

kubectl taint nodes node1 key1=value1:NoSchedule-

Set editor for kubectl

export KUBE_EDITOR="nano"

Example with creating admin user and getting token

Creating a admin / service account user called k8sadmin

sudo kubectl create serviceaccount k8sadmin -n kube-system

Give the user admin privileges

sudo kubectl create clusterrolebinding k8sadmin --clusterrole=cluster-admin --serviceaccount=kube-system:k8sadmin

Get the token

sudo kubectl -n kube-system describe secret $(sudo kubectl -n kube-system get secret | (grep k8sadmin || echo "$_") | awk '{print $1}') | grep token: | awk '{print $2}'