micronaut-multiple-services-kubernetes.yaml

# This demonstrates how to run the image in Kubernetes and expose it via a load balancer
apiVersion: apps/v1
kind: Deployment
metadata:
  name: micronaut-random-greetings
spec:
  selector:
    matchLabels:
      app: micronaut-greetings-app
  replicas:
  template:
    metadata:
      labels:
        app: micronaut-greetings-app
    spec:
      containers:
        - name: greetings-app
          image: greeting-service:latest
          imagePullPolicy: IfNotPresent               # important - otherwise Kubernetes will try to pull from DockerHub

          livenessProbe:
            httpGet:
              path: /health
              port: 8080
            periodSeconds: 10
            failureThreshold: 3

          readinessProbe:
            httpGet:
              path: /health
              port: 8080
            periodSeconds: 5

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: micronaut-random-name
spec:
  selector:
    matchLabels:
      app: micronaut-name-app
  replicas:
  template:
    metadata:
      labels:
        app: micronaut-name-app
    spec:
      containers:
        - name: name-app
          image: name-service:latest
          imagePullPolicy: IfNotPresent               # important - otherwise Kubernetes will try to pull from DockerHub

          livenessProbe:
            httpGet:
              path: /health
              port: 8080
            periodSeconds: 10
            failureThreshold: 3

          readinessProbe:
            httpGet:
              path: /health
              port: 8080
            periodSeconds: 5

---
# Create a load balancer for the app to expose it on localhost:8080
# $ curl localhost:8080/greetings
apiVersion: v1
kind: Service
metadata:
  name: greetings-service-loadbalancer
spec:
  selector:
    app: micronaut-greetings-app
  ports:
    - port: 8080        # the localhost port that we will use to expose the service
      targetPort: 8080  # the port on the container
  type: LoadBalancer
---
# Allow the greeting service to find the name service
apiVersion: v1
kind: Service
metadata:
  name: name-service-loadbalancer
spec:
  selector:
    app: micronaut-name-app
  ports:
    - port: 8080        # the localhost port that we will use to expose the service
      targetPort: 8080  # the port on the container
  type: NodePort