apiVersion: apps/v1
kind: Deployment
metadata:
  name: test-app
  namespace: rm-pgsql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: test-app
  template:
    metadata:
      labels:
        app: test-app
    spec:
      containers:
      - name: test-app
        image: node:18
        command: ["/bin/sh", "-c"]
        args:
        - |
          mkdir -p /tmp/app && \
          cp /app/test_app.js /app/package.json /tmp/app/ && \
          cd /tmp/app && \
          npm install && \
          node test_app.js
        env:
        - name: DB_HOST
          value: rm-psql-pooler-repl
        - name: DB_USER
          valueFrom:
            secretKeyRef:
              name: rmu.rm-psql
              key: username
        - name: DB_PASSWORD
          valueFrom:
            secretKeyRef:
              name: rmu.rm-psql
              key: password
        - name: DB_NAME
          value: rm
        volumeMounts:
        - name: app-code
          mountPath: /app
      volumes:
      - name: app-code
        configMap:
          name: test-app-configmap
          items:
          - key: test_app.js
            path: test_app.js
          - key: package.json
            path: package.json
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: test-app-configmap
  namespace: rm-pgsql
data:
  test_app.js: |
    const { Client } = require('pg');

        const client = new Client({
          host: process.env.DB_HOST,
          user: process.env.DB_USER,
          password: process.env.DB_PASSWORD,
          database: process.env.DB_NAME,
          ssl: {
                require: true,
                rejectUnauthorized: false
              }
        });

        client.connect()
          .then(() => {
            console.log(`Successfully connected to the database ${process.env.DB_NAME} on ${process.env.DB_HOST}`);
            return client.end();
          })
          .catch((err) => {
            console.error(`Error: ${err}`);
          });
  package.json: |
      {
        "name": "test-app",
        "version": "1.0.0",
        "main": "test_app.js",
        "dependencies": {
          "pg": "^8.7.1"
        }
      }
---