kuberntes upgrade useful command

kubectl drain ip-10-222-110-231.eu-west-1.compute.internal --delete-emptydir-data="true" --ignore-daemonsets="true" --timeout="15m" --force

kubectl get nodes --label-columns beta.kubernetes.io/instance-type --label-columns beta.kubernetes.io/capacity-type -l role=worker

• deleted pod automatically

#send output to env_output.tail
for i in $(cat qa.node); 
do echo "draining node : $i"
kubectl drain $i  --delete-emptydir-data="true" --ignore-daemonsets="true" --timeout="15m" --force >> env_output.tail 2>&1
echo "completed node : $i"
done

#read env_output.tail to delete pod
while(true)
do
pods=$(tail -n 20 env_output.tail | grep "error when evicting" | cut -d '(' -f1 | awk -F 'evicting' '{print $2}' | uniq | awk '{print $1,$2,$3}')
echo pods: $pods
apod=$(echo "$pods" | sed 's/"//g')
echo apod: $apod
echo "kubectl delete $apod"
kubectl delete $apod
sleep 5
done

#namespace=$(kubeclt get ns | tr "\n" " ")
namespace="abc xyz"

for ns in $namespace
do
    deploy=$(kubectl get deploy -n $ns | grep -v '0/' | awk '{print $1}' | sed 1d)
    for i in $deploy
    do
        kubectl -n $ns patch deployment $i -p '{"spec": {"template": {"spec": {"containers": [{"name": "'$i'","resources": { "requests": {"cpu": "100m"}}}]}}}}'
        echo "patched : $i ns=$ns"
    done
done

https://faun.pub/kubectl-commands-cheatsheet-43ce8f13adfb