Kubernetes notes and cheatsheet

Special Use Cases

If you need too delete a pod, and can not wait for it to stop and terminate, you can force the delettions with the following:

kubectl delete pods -n <namespace> --grace-period=0 --force
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Flags

```
--grace-period
```
: Period of time in seconds given to the resource to terminate gracefully. Ignored if negative. Set to 1 for immediate shutdown. Can only be set to 0 when —force is true (force deletion).
```
--force
```
: Only used when grace-period=0. If true, immediately remove resources from API and bypass graceful deletion. Note that immediate deletion of some resources may result in inconsistency or data loss and requires confirmation.

General Troubleshooting

Below are a few basic general areas to look into when trying to debug a issues depending on what the problem is.

Describe pod
logs pod
exec into pod to see whats going on

Deleting A Namespace

#!/bin/bash

# ./delete_namespace.sh <namespace>

export k8s_namespace=$1

echo "~~ Removing deployments ~~"
kubectl get deployment -n "$k8s_namespace" | grep -v NAME | awk '{print $1}' | xargs -I arg kubectl delete deployment -n "$k8s_namespace" arg
echo ""
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