kubernetes.yml

---

# Start the service before the pods, to have its hostname
#   available in the port as environment variable
#  $SERVICE_NAME_SERVICE_HOST:$SERVICE_NAME_SERVICE_PORT
kind: Service
apiVersion: v1
metadata:
  name: haproxy-service
  labels:
    environment: production
    tier: frontend
spec:
  selector:
    app: haproxy-service
  ports:
    # These ports can be used internallly
    # There is only one exported port
    - protocol: TCP
      port: 4001
      name: grpc
    - protocol: TCP
      name: https
      port: 443
      # Alternatively the pod can use a service
      #   as a proxy for external services
    - protocol: TCP
      port: 4369
      name: otp

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: haproxy-deployment
  labels:
    tier: frontend
spec:
  replicas: 1
  selector:
    matchLabels:
      app: haproxy-deployment
  template:
    metadata:
      labels:
        app: haproxy-deployment
    spec:
      containers:
        # Configure the haproxy with a custom build, command or
        #  mount a file
        - name: haproxy-deployment
          image: haproxy:2.0.5
          ports:
            - containerPort: 8000
            - containerPort: 4001
            - containerPort: 4369

        - name: haproxy-deployment-exporter
          image: prom/haproxy-exporter
          args: ["--haproxy.scrape-uri", "http://$HAPROXY_SERVICE_SERVICE_HOST:$HAPROXY_PORT_SERVICE_PORT/haproxy?stats;csv"]
          ports:
            - containerPort: 9101

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: api-deployment
  labels:
    environment: production
    app: api-endpoint
spec:
  replicas: 3
  selector:
    matchLabels:
      app: api-endpoint
  template:
    metadata:
      labels:
        app: api-endpoint
    spec:
      containers:
        # You need to use a registry
        - image: football-results:0.1.0
          imagePullPolicy: Always
          name: football-results
          ports:
            - containerPort: 4369
              protocol: TCP
            - containerPort: 4001
              protocol: TCP
            - containerPort: 4000
              protocol: TCP