keep container running on Kubernetes

Question

I've tried running container by using kubectl run-container command like

kubectl run-container test_container ubuntu:latest --replicas=1

but container exits in few seconds and ReplicationController launches it again repeatedly. Is there a way to keep the containers running?

Answer 1

Provide your container with a task that will never finish. Something like this should work:

apiVersion: v1
kind: Pod
metadata:
  name: ubuntu
spec:
  containers:
  - name: ubuntu
    image: ubuntu:latest
    # Just spin & wait forever
    command: [ "/bin/bash", "-c", "--" ]
    args: [ "while true; do sleep 30; done;" ]

For further details, refer to the Kubernetes Training.

Answer 2

Try using this CMD in your Dockerfile:

CMD exec /bin/bash -c "trap : TERM INT; sleep infinity & wait"

This command keeps the container up ans running or alive until its told to stop