apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx
data:
  nginx.conf: |
    worker_processes 5;
    events {
    }
    http {
      # This is the main site.
      server {
        listen 80 default_server;
        default_type text/plain;

        location / {
          return 200 "Hostname: $hostname\nUser: $remote_user\nProtocol: $server_protocol\nMethod: $request_method\nPath: $request_uri\nServer: $server_addr\nHttp_host: $http_host\nuser_agent: $http_user_agent\nRemote IP: $remote_addr\n";
        }

        location = /healthz {
          add_header Content-Type text/plain;
          return 200 'ok';
        }
      }
    }
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo-app
  labels:
    app: demo-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: demo-app
  template:
    metadata:
      labels:
        app: demo-app
    spec:
      containers:
      - name: demo-app
        image: ubuntu/nginx
        imagePullPolicy: IfNotPresent
        ports:
        - name: http
          containerPort: 80
        volumeMounts:
        - name: nginx
          mountPath: /etc/nginx
          readOnly: true
      volumes:
      - name: nginx
        configMap:
          name: nginx
---
apiVersion: v1
kind: Service
metadata:
  name: demo-app
  labels:
    app: demo-app
spec:
  ports:
    - port: 80
      targetPort: 80
      protocol: TCP
      name: tcp
  selector:
    app: demo-app