service: db
  name: db
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      service: db
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        service: db
    spec:
      containers:
        - env:
            - name: POSTGRES_DB
              value: mydb
            - name: POSTGRES_PASSWORD
              value: whatever
            - name: POSTGRES_USER
              value: postgres
          image: postgres
          name: db
          ports:
            - containerPort: 5432
              protocol: TCP
          resources: {}
      restartPolicy: Always
status: {}
---
apiVersion: v1
kind: Service
metadata:
  labels:
    service: server
  name: server
  namespace: default
spec:
  type: NodePort
  ports:
    - name: "8080"
      port: 8080
      targetPort: 8080
      nodePort: 30001
  selector:
    service: server
status:
  loadBalancer: {}
---
apiVersion: v1
kind: Service
metadata:
  labels:
    service: db
  name: db
  namespace: default
spec:
  ports:
    - name: "5432"
      port: 5432
      targetPort: 5432
  selector:
    service: db
status:
  loadBalancer: {}
```

In this Kubernetes YAML file, there are four objects, separated by the `---`. In addition to a Service and Deployment for the database, the other two objects are:

- A Deployment, describing a scalable group of identical pods. In this case,
  you'll get just one replica, or copy of your pod. That pod, which is
  described under `template`, has just one container in it. The container is
  created from the image built by GitHub Actions in [Configure CI/CD for your
  Go application](configure-ci-cd.md).
- A NodePort service, which will route traffic from port 30001 on your host to
  port 8080 inside the pods it routes to, allowing you to reach your app
  from the network.

To learn more about Kubernetes objects, see the [Kubernetes documentation](https://kubernetes.io/docs/home/).

## Deploy and check your application

1. In a terminal, navigate to the project directory
   and deploy your application to Kubernetes.

   ```console
   $ kubectl apply -f docker-go-kubernetes.yaml
   ```

   You should see output that looks like the following, indicating your Kubernetes objects were created successfully.