Since our backend API is a stateless application, we don't need to deploy a StatefulSet like we did with Elasticsearch. We can simply use a simpler Kubernetes Object that we've encountered already—Deployment.
Create a new manifest at manifests/backend/deployment.yaml with the following content:
apiVersion: apps/v1kind: Deploymentmetadata: name: backend labels: app: backendspec: selector: matchLabels: app: backend replicas: 3 template: metadata: labels: app: backend spec: containers: - name: backend image: d4nyll/hobnob:0.1.0 ports: - containerPort: 8080 name: api - containerPort: 8100 name: docs env: - name: ELASTICSEARCH_HOSTNAME value: "http://elasticsearch" - name: ELASTICSEARCH_PORT value: "9200" ...
For the .spec.template.spec.containers[].env ...