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Ques:-
A junior DevOps team member encountered difficulties deploying a stack on the Kubernetes cluster. The pod fails to start, presenting errors. Let's troubleshoot and rectify the issue promptly.
There is a pod named webserver, and the container within it is named httpd-container, its utilizing the httpd:latest image.
Additionally, there's a sidecar container named sidecar-container using the ubuntu:latest image.
Identify and address the issue to ensure the pod is in the running state and the application is accessible.
Ans:-
raj@jumphost ~$ kubectl get pod
NAME READY STATUS RESTARTS AGE
webserver 1/2 ImagePullBackOff 0 6m36s
raj@jumphost ~$ kubectl logs webserver
Defaulted container "httpd-container" out of: httpd-container, sidecar-container
Error from server (BadRequest): container "httpd-container" in pod "webserver" is waiting to start: trying and failing to pull image
raj@jumphost ~$ kubectl describe pod webserver
Name: webserver
Namespace: default
Priority: 0
Service Account: default
Node: kodekloud-control-plane/172.17.0.2
Start Time: Mon, 06 Oct 2025 09:52:57 +0000
Labels: app=web-app
Annotations: <none>
Status: Pending
IP: 10.244.0.5
IPs:
IP: 10.244.0.5
Containers:
httpd-container:
Container ID:
Image: httpd:latests
Image ID:
Port: <none>
Host Port: <none>
State: Waiting
Reason: ImagePullBackOff
Ready: False
Restart Count: 0
Environment: <none>
Mounts:
/var/log/httpd from shared-logs (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-7v7nm (ro)
sidecar-container:
Container ID: containerd://c559916254f3ae3d5397b2c41350cfb8471db98945f2a9061cc3757a41bc7354
Image: ubuntu:latest
Image ID: docker.io/library/ubuntu@sha256:728785b59223d755e3e5c5af178fab1be7031f3522c5ccd7a0b32b80d8248123
Port: <none>
Host Port: <none>
Command:
sh
-c
while true; do cat /var/log/httpd/access.log /var/log/httpd/error.log; sleep 30; done
State: Running
Started: Mon, 06 Oct 2025 09:53:02 +0000
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/var/log/httpd from shared-logs (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-7v7nm (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
shared-logs:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:
SizeLimit: <unset>
kube-api-access-7v7nm:
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 7m20s default-scheduler Successfully assigned default/webserver to kodekloud-control-plane
Normal Pulling 7m19s kubelet Pulling image "ubuntu:latest"
Normal Pulled 7m15s kubelet Successfully pulled image "ubuntu:latest" in 3.742060201s (3.742079128s including waiting)
Normal Created 7m15s kubelet Created container sidecar-container
Normal Started 7m15s kubelet Started container sidecar-container
Normal Pulling 6m35s (x3 over 7m19s) kubelet Pulling image "httpd:latests"
Warning Failed 6m35s (x3 over 7m19s) kubelet Failed to pull image "httpd:latests": rpc error: code = NotFound desc = failed to pull and unpack image "docker.io/library/httpd:latests": failed to resolve reference "docker.io/library/httpd:latests": docker.io/library/httpd:latests: not found
Warning Failed 6m35s (x3 over 7m19s) kubelet Error: ErrImagePull
Warning Failed 5m59s (x6 over 7m15s) kubelet Error: ImagePullBackOff
Normal BackOff 2m13s (x21 over 7m15s) kubelet Back-off pulling image "httpd:latests"
raj@jumphost ~$ kubectl edit pod webserver
pod/webserver edited
raj@jumphost ~$ kubectl get pod
NAME READY STATUS RESTARTS AGE
webserver 2/2 Running 0 10m
raj@jumphost ~$
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