project: Deploy the Backend with Helm

Tags kubernetes helm
Hard Prerequisites
IMPORTANT: Please review these prerequisites, they include important information that will help you with this content.
  • K8S: Manual App Deployment – Project Overview
    • Soft Prerequisites
  • K8S: Deploy the Frontend with Helm

    • Let’s finish up by deploying our backend. First, update the python key under the helm/buttons/values.yaml file with the following content:

    python:
  image:
    repository: harbor.<your-domain>/application/python
    tag: v2
  name: nginx
  name: python
  envs:
    - name: DB_HOST
      value: "postgresql.default.svc.cluster.local" 
    - name: DB_NAME
      value: dbname
    - name: DB_USER
      value: youruser
    - name: DB_PASSWORD
      valueFrom:
        secretKeyRef:
          name: postgresql
          key: password
  service: 
    type: ClusterIP
    port: 5000

    Now a challenge!

    Create the helm/buttons/templates/python-deployment.yaml file by yourself. A few things to take into consideration:

    • Use environment variables to connect to the PostgreSQL database
    • Reuse the resource limits from the nginx values
    • Check the application health with the liveness and readiness probes, using the /health endpoint
    • Remember to add the spec.selector.matchLabels to connect the Deployment to the Service

    Commit your changes, go to your EC2 instance and let’s upgrade our Helm installation with the new resources.

    On your browser, go to https://<your-domain> and try out the Buttons app, now deployed fully with Helm!

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