Demo Deploying Voting app -worker pod failed to start

Kubernetes
#1

After executing the command to create and start worker pod with yaml file; pod status showing CrashLoopBackOff.

Please help to troubleshoot and solve this.

C:\Users\sskkube\Documents\Kube-practise\Demo-VotingApp>kubectl describe pod worker-app-pod
Name: worker-app-pod
Namespace: default
Priority: 0
Node: docker-desktop/192.168.65.4
Start Time: Thu, 03 Feb 2022 14:14:38 +0000
Labels: app=demo-voting-app
name=worker-app-pod
Annotations:
Status: Running
IP: 10.1.0.98
IPs:
IP: 10.1.0.98
Containers:
worker-app:
Container ID: docker://45ca34bbaf5130969fa2ab6ad8ea04987976a79f2ffbe74406876280c64d3712
Image: kodekloud/examplevotingapp_worker:v1
Image ID: docker-pullable://kodekloud/examplevotingapp_worker@sha256:741e3aaaa812af72ce0c7fc5889ba31c3f90c79e650c2cb31807fffc60622263
Port:
Host Port:
State: Terminated
Reason: Error
Exit Code: 1
Started: Thu, 03 Feb 2022 14:16:08 +0000
Finished: Thu, 03 Feb 2022 14:16:09 +0000
Last State: Terminated
Reason: Error
Exit Code: 1
Started: Thu, 03 Feb 2022 14:15:25 +0000
Finished: Thu, 03 Feb 2022 14:15:25 +0000
Ready: False
Restart Count: 4
Environment:
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-4lv8m (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
kube-api-access-4lv8m:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional:
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors:
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 97s default-scheduler Successfully assigned default/worker-app-pod to docker-desktop
Normal Pulled 7s (x5 over 95s) kubelet Container image “kodekloud/examplevotingapp_worker:v1” already present on machine
Normal Created 7s (x5 over 95s) kubelet Created container worker-app
Normal Started 7s (x5 over 94s) kubelet Started container worker-app
Warning BackOff 5s (x8 over 90s) kubelet Back-off restarting failed container

#2

@reach.suryask
Please follow these full steps to know what you have missed and try again :

Note: We will create deployments again so please before following the steps, Run kubectl delete deployment --all to delete old deployments and avoid any conflicts.

  1. Run git clone https://github.com/mmumshad/example-voting-app-kubernetes-v2.git

  2. Run cd example-voting-app-kubernetes-v2/

  3. Run vim postgres-deployment.yml and modify it’s content as below then save and exit.

Note: It’s a new update from Postgres.

apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: postgres-deployment
   labels:
     app: demo-voting-app
 spec:
   replicas: 1
   selector:
     matchLabels:
       name: postgres-pod
       app: demo-voting-app
   template:
     metadata:
       name: postgres-pod
       labels:
         name: postgres-pod
         app: demo-voting-app
     spec:
       containers:
       - name: postgres
         image: postgres:9.4
         env:
         - name: POSTGRES_USER
           value: postgres
         - name: POSTGRES_PASSWORD
           value: postgres
         - name: POSTGRES_HOST_AUTH_METHOD
           value: trust
         ports:
         - containerPort: 5432

  1. Run kubectl create -f . if you create deployments for the first time, if you created the same deployments before Run kubectl apply -f . .

  2. Run kubectl get service to get the exposed ports.

For example if the output of the command as above you can accces the voting app by hitting One_of_the_worker_nodes_IP:32733 on your browser and the same for the resulting app >> One_of_the_worker_nodes_IP:30013.

Check :

Note: The voting application only accepts one vote per client. It does not register votes if a vote has already been submitted from a client.

Hope this helps!

1 Like
#3

Thanks Ayman,
After updating postgres pod in env with below key value it got worked.

    - name: POSTGRES_HOST_AUTH_METHOD
      value: trust
2 Likes
#4

Thank you - just had this problem and fixed it. This should be added to the course lecture as it is missing there.

1 Like
#5

Hello everybody! :slight_smile:

And today was my turn, this would be really nice to be added to the lecture. I’ve spent some time looking around before get here.

Thank You All!

Cheers

#6

Hi Team, I am facing an issue while deploying worker deployment: Using https://github.com/kodekloudhub/example-voting-app/blob/master/k8s-specifications/worker-app-deploy.yaml

Warning BackOff 23s (x48 over 10m) kubelet Back-off restarting failed container:

Events:
Type Reason Age From Message

Normal Scheduled 10m default-scheduler Successfully assigned default/worker-deployment-69968cb55b-mdbcl to gke-archt-default-pool-85ac1a95-f20t
Normal Pulled 9m13s (x5 over 10m) kubelet Container image “kodekloud/examplevotingapp_worker:v1” already present on machine
Normal Created 9m13s (x5 over 10m) kubelet Created container worker-app
Normal Started 9m13s (x5 over 10m) kubelet Started container worker-app
Warning BackOff 23s (x48 over 10m) kubelet Back-off restarting failed container

Please help me

Regards
Ayush Sahu
[email protected]