python-based echo headers for kubernetes

echo-headers.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: python-http
  labels:
    app: python-http
data:
  app.py: |
    from http.server import HTTPServer, BaseHTTPRequestHandler

    class RequestHandler(BaseHTTPRequestHandler):
        def do_GET(self):
            # print("Request headers:", self.headers)
            self.send_response(200)
            self.send_header("Content-type", "text")
            self.end_headers()
            for k,v in self.headers.items():
                self.wfile.write(bytes(f"{k}: {v}\n", "utf-8"))

    def main():
        print('Listening on 0.0.0.0:8080')
        server = HTTPServer(('', 8080), RequestHandler)
        server.serve_forever()

    if __name__ == "__main__":
        main()
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: python-http
  labels:
    app: python-http
spec:
  replicas: 1
  selector:
    matchLabels:
      app: python-http
  template:
    metadata:
      labels:
        app: python-http
    spec:
      terminationGracePeriodSeconds: 1
      containers:
      - image: image-registry.openshift-image-registry.svc:5000/openshift/python:latest
        command:
        - python3
        - /application/app.py
        name: python
        volumeMounts:
        - name: app
          mountPath: /application
      volumes:
      - name: app
        configMap:
          name: python-http
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: python-http
  name: python-http
spec:
  ports:
  - name: http
    port: 8080
    protocol: TCP
    targetPort: 8080
  selector:
    app: python-http
  type: ClusterIP
---
kind: Route
apiVersion: route.openshift.io/v1
metadata:
  labels:
    app: python-http
  name: python-http
spec:
  to:
    kind: Service
    name: python-http
    weight: 100
  port:
    targetPort: http
  tls:
    termination: edge
    insecureEdgeTerminationPolicy: Redirect