# K8s Index ## Collection of useful commands and code snippets related to K8s ### Find and delete all pods with regex match **Note:** Change `^name` with pod name Without force ```bash kubectl delete pods $(kubectl get pods --no-headers -o custom-columns=":metadata.name" | grep ^name) ``` With force ```bash kubectl delete pods $(kubectl get pods --no-headers -o custom-columns=":metadata.name" | grep ^name) --force --grace-period=0 ``` --- ### Create k8s user super with cluster-admin role and fetch its api key ```bash kubectl create sa super ``` ```bash kubectl create clusterrolebinding super-admin-binding --clusterrole=cluster-admin --serviceaccount=default:super ``` ```bash kubectl apply -f - <<EOF apiVersion: v1 kind: Secret metadata: name: super-api namespace: default annotations: kubernetes.io/service-account.name: super type: kubernetes.io/service-account-token EOF ``` ```bash kubectl get secret super-api -o jsonpath='{.data.token}' | base64 --decode ``` ### SSH access of any node ```bash kubectl debug node/<node-name> -it --image=ubuntu .... .... chroot /host ... ... bash # now you have ssh connection of the node ``` ### Run a K8s benchmark ```bash kubectl apply -f https://raw.githubusercontent.com/aquasecurity/kube-bench/main/job.yaml ``` to see result ```bash kubectl get pods kubectl logs <pod-name> # pods name will be kube-bench-***** ``` ### add docker Registry secret ```bash kubectl create secret docker-registry <secret-name> -n <namespace> \ --docker-server=<your-registry-server> \ --docker-username=<your-username> \ --docker-password=<your-password> # can provide tokens too\ --docker-email=<your-email> ```