mikamboo/kube-nodejs-echo-header.yaml

## kube-nodejs-echo-header.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: nodejs-app
  labels:
    app: nodejs-app
data:
  server.js: |
    const http = require("http");
    const host = '0.0.0.0';
    const port = 8080;

    const requestListener = function (req, res) {
      //console.log(req)
      res.setHeader("Content-Type", "application/json");
      res.writeHead(200);
      res.end(JSON.stringify(req.headers, null, 3));
      //res.setHeader("Content-Type", "text/html");
      //res.end(`<html><body><h1>This is HTML !!!</h1></body></html>`);
    };

    const server = http.createServer(requestListener);
    server.listen(port, host, () => {
        console.log(`Server is running on http://${host}:${port}`);
    });
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: nodejs-app
  labels:
    app: nodejs-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nodejs-app
  template:
    metadata:
      labels:
        app: nodejs-app
    spec:
      volumes:
        - name: nodejs-app
          configMap:
            name: nodejs-app
            items:
              - key: server.js
                path: server.js
      containers:
        - name: nodejs-app
          env:
          - name: APP
            value: nodejs
          - name: NODE_DEBUG
            value: http
          volumeMounts:
            - name: nodejs-app
              mountPath: /app
              readOnly: false
          imagePullPolicy: Always
          ports:
            - name: web
              containerPort: 8080
          image: node:14-alpine
          #command: ["/bin/sh", "-ec", "sleep infinity"]
          command: ["/usr/local/bin/node", "/app/server.js"]
          livenessProbe:
            httpGet:
              path: /healthz
              port: 8080
          resources:
            limits:
              cpu: 200m
              memory: 256Mi
            requests:
              cpu: 100m
              memory: 128Mi
---
apiVersion: v1
kind: Service
metadata:
  name: nodejs-app
  labels:
    app: nodejs-app
spec:
  ports:
    - protocol: TCP
      name: web
      port: 80
      targetPort: 8080
  selector:
    app: nodejs-app
---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: nodejs-app
  labels:
    app: nodejs-app
spec:
  entryPoints:
    - web
    - websecure
  routes:
  - match: Host(`my.nodejs.app`) && PathPrefix(`/`)
    kind: Rule
    services:
    - name: nodejs-app
      port: 80