problems with the "alpine" image for my initContainers - kubernetes

Question

People,
I am trying to create a simple file /tmp/tarte.test with initContainers. I have a constraint, using an alpine image for the container. Please let me know what is NOT in this simple yaml file.
apiVersion: v1
kind: Pod
metadata:
name: initonpod
namespace: prod
labels:
app: myapp
spec:
containers:
- name: mycont-nginx
image: alpine
initContainers:
- name: myinit-cont
image: alpine
imagePullPolicy: IfNotPresent
command:
- touch
- "/tmp/tarte.test"
- sleep 200
the describe of the pod
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 9s default-scheduler Successfully assigned prod/initonpod to k8s-node-1
Normal Pulled 8s kubelet, k8s-node-1 Container image "alpine" already present on machine
Normal Created 8s kubelet, k8s-node-1 Created container
Normal Started 7s kubelet, k8s-node-1 Started container
Normal Pulling 4s (x2 over 7s) kubelet, k8s-node-1 pulling image "alpine"
Normal Pulled 1s (x2 over 6s) kubelet, k8s-node-1 Successfully pulled image "alpine"
Normal Created 1s (x2 over 5s) kubelet, k8s-node-1 Created container
Normal Started 1s (x2 over 5s) kubelet, k8s-node-1 Started container
Warning BackOff 0s kubelet, k8s-node-1 Back-off restarting failed container
And if I change the alpine image for an nginx image container... it's work good.

Answer 1

Back-off restarting failed container because of your container spec.
spec:
containers:
- name: mycont-nginx
image: alpine
This alpine container doesn't run forever. In kubernetes, container has to run forever.That's why you are getting error. When you use nginx image, it runs forever. So to use alpine image change the spec as below:
apiVersion: v1
kind: Pod
metadata:
name: busypod
labels:
app: busypod
spec:
containers:
- name: busybox
image: alpine
command:
- "sh"
- "-c"
- >
while true; do
sleep 3600;
done
initContainers:
- name: myinit-cont
image: alpine
imagePullPolicy: IfNotPresent
command:
- touch
- "/tmp/tarte.test"
- sleep 200