Handy Kubernetes Gists

Cordon-All-Nodes.md

Cordon all nodes.

for i in $(kubectl get nodes | grep ip |awk '{print $1}'); do kubectl cordon $i; done

delete-namespace-stuck-in-terminating-state.md

Deletes a namespace stuck in terminating.

kubectl get namespace <terminating-namespace> -o json >tmp.json

Edit the json file and remove “kubernetes” from the finalizer. So your spec will look something like this.

      "spec": {
         "finalizers": []
      },

Connect to the kube api.

kubectl proxy

Update the finalizers using the API.

 curl -k -H "Content-Type: application/json" -X PUT --data-binary @tmp.json http://127.0.0.1:8001/api/v1/namespaces/<terminating-namespace>/finalize

delete-pod-stuck-in-terminating-state.md

Deletes pods that are stuck in a terminating state.

kubectl delete pod --grace-period=0 --force --namespace <NAMESPACE> <PODNAME>

temporary-test-container.md

Creates a temporary container to troubleshoot networking within Kubernetes.

kubectl -n amazon-cloudwatch  run tmp-shell --restart=Never --rm -i --tty --image nicolaka/netshoot -- /bin/bash

Uncordon-All-Nodes.md

Uncordon all nodes.

for i in $(kubectl get nodes | grep ip |awk '{print $1}'); do kubectl uncordon $i; done