mmumshad/kubernetes-example-voting-app

Deploy Docker's example voting app on Kubernetes

example-voting-app-kubernetes-v2

This is based on the original example-voting-app from docker-examples(https://github.com/dockersamples)

modified to work on Kubernetes

kubernetes-example-voting-app's Issues

How to visit the vote page(what's the url)

the pods are running, port 31000 and port 31001 are used by a process called kube-proxy. to visiti the web page, I visit localhost:31000 at the master node, but it displays "Unable to establish connection". what's the reason, thanks!

Postgres pod is failing

Thank you for such a great overview of the k8s functionality, but I encountered an issue related to postgres-pod. The current configuration doesn't work on the latest GCP

// postgres-pod.yml
apiVersion: v1
kind: Pod
metadata:
  name: postgres-pod
  labels:
    name: postgres-pod
    app: demo-voting-app
spec:
  containers:
    - name: postgres
      image: postgres:9.4
      ports:
        - containerPort: 5432

It generates an error while pod is starting by executing a command kubectl create -f postgres-pod.yml:

Error: Database is uninitialized and superuser password is not specified.
       You must specify POSTGRES_PASSWORD for the superuser. Use
       "-e POSTGRES_PASSWORD=password" to set it in "docker run".
       You may also use POSTGRES_HOST_AUTH_METHOD=trust to allow all connections
       without a password. This is *not* recommended. See PostgreSQL
       documentation about "trust":
       

I fixed it this way:

// postgres-pod.yml
apiVersion: v1
kind: Pod
metadata:
  name: postgres-pod
  labels:
    name: postgres-pod
    app: demo-voting-app
spec:
  containers:
    - name: postgres
      image: postgres:9.4
      env:
        - name: POSTGRES_HOST_AUTH_METHOD
          value: "trust"
      ports:
        - containerPort: 5432

It would be really cool if you can upgrade the repo with the working example

It is not an issue, just a query

How worker pod knows that it needs to send the data to Redis/Postgres, generally pods get attached to service from selector,
And how voting/result app knows to send the data to redis/postgres from redis/postgres service
In the udemy, you explained that Redis/Postgres has services connecting to the apps and worker pods.
-redis service connected to voting-app and worker pod
-postgres service connected to result-app and worker pod

result app not working

result app not working - its not updating the result, how can we troubleshoot