[ k8s ] frequently used commands in kubenetes

- cmd to show nodes taint

kubectl get nodes -o json | jq '.items[].spec.taints'

- remove or untaint a node

kubectl taint nodes node1 key1=value1:NoSchedule-

- cordon all node 

kubectl get nodes | awk '{if (NR!=1) {print $1}}' | xargs -I {} kubectl cordon {}
- Kubectl autocomplete : 

source <(kubectl completion bash) # set up autocomplete in bash into the current shell, bash-completion package should be installed first.
echo "source <(kubectl completion bash)" >> ~/.bashrc # add autocomplete permanently to your bash shell.
alias k=kubectl
complete -o default -F __start_kubectl k
- Get all pods in a node : 
kubectl get pods --all-namespaces -o wide --field-selector spec.nodeName=<nodename>