Getting CrashBackloopError when deploying a pod - kubernetes

Question

I am new to kubernetes and am trying to deploy a pod with private registry. Whenever I deploy this yaml it goes crash loop. Added sleep with a large value thinking that might cause this, still haven't worked.
apiVersion: v1
kind: Pod
metadata:
name: privetae-image-testing
spec:
containers:
- name: private-image-test
image: buildforjenkin.azurecr.io/nginx:latest
imagePullPolicy: IfNotPresent
command: ['echo','success','sleep 1000000']
Here are the logs:
Name: privetae-image-testing
Namespace: default
Priority: 0
Node: docker-desktop/192.168.65.4
Start Time: Sun, 24 Oct 2021 15:52:25 +0530
Labels: <none>
Annotations: <none>
Status: Running
IP: 10.1.1.49
IPs:
IP: 10.1.1.49
Containers:
private-image-test:
Container ID: docker://46520936762f17b70d1ec92a121269e90aef2549390a14184e6c838e1e6bafec
Image: buildforjenkin.azurecr.io/nginx:latest
Image ID: docker-pullable://buildforjenkin.azurecr.io/nginx#sha256:7250923ba3543110040462388756ef099331822c6172a050b12c7a38361ea46f
Port: <none>
Host Port: <none>
Command:
echo
success
sleep 1000000
State: Waiting
Reason: CrashLoopBackOff
Last State: Terminated
Reason: Completed
Exit Code: 0
Started: Sun, 24 Oct 2021 15:52:42 +0530
Finished: Sun, 24 Oct 2021 15:52:42 +0530
Ready: False
Restart Count: 2
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-ld6zz (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
kube-api-access-ld6zz:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 34s default-scheduler Successfully assigned default/privetae-image-testing to docker-desktop
Normal Pulled 17s (x3 over 33s) kubelet Container image "buildforjenkin.azurecr.io/nginx:latest" already present on machine
Normal Created 17s (x3 over 33s) kubelet Created container private-image-test
Normal Started 17s (x3 over 33s) kubelet Started container private-image-test
Warning BackOff 2s (x5 over 31s) kubelet Back-off restarting failed container
I am running the cluster on docker-desktop on windows. TIA

Answer 1

Notice you are using standard nginx image? Try delete your pod and re-apply with:
apiVersion: v1
kind: Pod
metadata:
name: private-image-testing
labels:
run: my-nginx
spec:
restartPolicy: Always
containers:
- name: private-image-test
image: buildforjenkin.azurecr.io/nginx:latest
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
name: http
If your pod runs, you should be able to remote into with kubectl exec -it private-image-testing -- sh, follow by wget -O- localhost should print you a welcome message. If it still fail, paste the output of kubectl logs -f -l run=my-nginx to your question.

Answer 2

Check my previous answer to understand step-by step whats going on after you launch the container.
You are launching some nginx:latest container with the process inside that runs forever as it should be to avoid main process be exited. Then you add overlay that (I will quote David: print the words success and sleep 1000000, and having printed those words, then exit).
Instead of making your container running all the time to serve, you explicitly shooting into your leg by finishing the process using sleep 1000000.
And sure, your command will be executed and container will exit. Check that. It was exited correctly with status 0 and did that 2 times. And will more in the future.
Reason: CrashLoopBackOff
Last State: Terminated
Reason: Completed
Exit Code: 0
Started: Sun, 24 Oct 2021 15:52:42 +0530
Finished: Sun, 24 Oct 2021 15:52:42 +0530
You need to think well if you really need command: ['echo','success','sleep 1000000']