Step 1: Check Current Deployment Status
First, let's see what's currently deployed:
# Check all deployments
kubectl get deployments
# Check the specific deployment
kubectl get deployment python-deployment-datacenter
# Check pods status
kubectl get pods
# Check services
kubectl get services
Step 2: Examine Detailed Information
Let's look at the deployment and service configuration:
# Get detailed deployment information
kubectl describe deployment python-deployment-datacenter
# Get pod details (look for any error messages)
kubectl describe pods python-deployment-datacenter-6fdb496d59-df826
# Get service details
kubectl describe service python-service-datacenter
Output
thor@jumphost ~$ kubectl describe deployment python-deployment-datacenter
Name: python-deployment-datacenter
Namespace: default
CreationTimestamp: Sat, 08 Nov 2025 03:56:27 +0000
Labels: <none>
Annotations: deployment.kubernetes.io/revision: 1
Selector: app=python_app
Replicas: 1 desired | 1 updated | 1 total | 0 available | 1 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=python_app
Containers:
python-container-datacenter:
Image: poroko/flask-app-demo
Port: 5000/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Node-Selectors: <none>
Tolerations: <none>
Conditions:
Type Status Reason
---- ------ ------
Available False MinimumReplicasUnavailable
Progressing False ProgressDeadlineExceeded
OldReplicaSets: <none>
NewReplicaSet: python-deployment-datacenter-6fdb496d59 (1/1 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 20m deployment-controller Scaled up replica set python-deployment-datacenter-6fdb496d59 to 1
thor@jumphost ~$ kubectl describe pods python-deployment-datacenter-6fdb496d59-df826
Name: python-deployment-datacenter-6fdb496d59-df826
Namespace: default
Priority: 0
Service Account: default
Node: kodekloud-control-plane/172.17.0.2
Start Time: Sat, 08 Nov 2025 03:56:27 +0000
Labels: app=python_app
pod-template-hash=6fdb496d59
Annotations: <none>
Status: Pending
IP: 10.244.0.5
IPs:
IP: 10.244.0.5
Controlled By: ReplicaSet/python-deployment-datacenter-6fdb496d59
Containers:
python-container-datacenter:
Container ID:
Image: poroko/flask-app-demo
Image ID:
Port: 5000/TCP
Host Port: 0/TCP
State: Waiting
Reason: ImagePullBackOff
Ready: False
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-gfps4 (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
kube-api-access-gfps4:
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 22m default-scheduler Successfully assigned default/python-deployment-datacenter-6fdb496d59-df826 to kodekloud-control-plane
Normal Pulling 20m (x4 over 22m) kubelet Pulling image "poroko/flask-app-demo"
Warning Failed 20m (x4 over 22m) kubelet Failed to pull image "poroko/flask-app-demo": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/poroko/flask-app-demo:latest": failed to resolve reference "docker.io/poroko/flask-app-demo:latest": pull access denied, repository does not exist or may require authorization: server message: insufficient_scope: authorization failed
Warning Failed 20m (x4 over 22m) kubelet Error: ErrImagePull
Warning Failed 20m (x6 over 22m) kubelet Error: ImagePullBackOff
Normal BackOff 2m25s (x86 over 22m) kubelet Back-off pulling image "poroko/flask-app-demo"
thor@jumphost ~$ kubectl describe service python-service-datacenter
Name: python-service-datacenter
Namespace: default
Labels: <none>
Annotations: <none>
Selector: app=python_app
Type: NodePort
IP Family Policy: SingleStack
IP Families: IPv4
IP: 10.96.237.132
IPs: 10.96.237.132
Port: <unset> 8080/TCP
TargetPort: 8080/TCP
NodePort: <unset> 32345/TCP
Endpoints:
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>
Issues Identified:
Wrong image name: The deployment is using poroko/flask-app-demo but it should be poroko/flask-demo-app
Port mismatch: The service has targetPort 8080 but the Flask app runs on port 5000
Step 3: Fix the Image Name
Let's correct the image name in the deployment:
kubectl set image deployment/python-deployment-datacenter python-container-datacenter=poroko/flask-demo-app
Step 4: Fix the Service Port Configuration
The service needs to target port 5000 (Flask default) instead of 8080:
kubectl patch service python-service-datacenter -p '{"spec":{"ports":[{"port":8080,"targetPort":5000,"nodePort":32345}]}}'
Step 5: Verify the Fixes
# Check pod status
kubectl get pods
# Check deployment status
kubectl get deployment python-deployment-datacenter
# Check service endpoints (should now show the pod IP)
kubectl describe service python-service-datacenter
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