My kubernetes pods keep crashing with "CrashLoopBackOff" but I can't find any log

As @Sukumar commented, you need to have your Dockerfile have a Command to run or have your ReplicationController specify a command.

The pod is crashing because it starts up then immediately exits, thus Kubernetes restarts and the cycle continues.

kubectl -n <namespace-name> describe pod <pod name>

kubectl -n <namespace-name> logs -p  <pod name> 

I had the need to keep a pod running for subsequent kubectl exec calls and as the comments above pointed out my pod was getting killed by my k8s cluster because it had completed running all its tasks. I managed to keep my pod running by simply kicking the pod with a command that would not stop automatically as in:

kubectl run YOUR_POD_NAME -n YOUR_NAMESPACE --image SOME_PUBLIC_IMAGE:latest --command tailf /dev/null