Useful Kubectl Commands
```
kubectl run -i --tty --rm debug --image=curlimages/curl --restart=Never -- www.google.com -vvv

kubectl run -i --tty --rm debug --image=busybox --restart=Never -- sh


```

Testing Volume Mount from Configmap
```
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox1
  namespace: spark
  labels:
    app: busybox1
spec:
  containers:
  - image: busybox
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
    volumeMounts:
      - name: executor-template
        mountPath: "/opt/spark/configs"
        readOnly: true
  restartPolicy: Always
  volumes:
    - name: executor-template
      configMap:
        name: spark-executor-template
```