How would you deploy an Akka HTTP application using containerization, such as using Docker or Kubernetes?

To deploy an Akka HTTP application using containerization, follow these steps:

1. Create a Dockerfile : Define the base image (e.g., openjdk), copy your application’s JAR file into the image, and set the entry point to run the application.

FROM openjdk:8-jre
COPY target/scala-2.12/my-akka-http-app.jar /app/
CMD ["java", "-jar", "/app/my-akka-http-app.jar"]?

2. Build the Docker image : Run docker build -t my-akka-http-app . in the terminal.

3. Push the image to a container registry : Tag the image with the registry URL (e.g., docker tag my-akka-http-app myregistry.com/my-akka-http-app) and push it (docker push myregistry.com/my-akka-http-app).

4. Deploy using Kubernetes : Create a deployment YAML file defining the desired number of replicas, the container image, and any necessary environment variables or configurations.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-akka-http-app
spec:
  replicas: 3
  template:
    metadata:
      labels:
        app: my-akka-http-app
    spec:
      containers:
      - name: my-akka-http-app
        image: myregistry.com/my-akka-http-app
        ports:
        - containerPort: 8080?

5. Apply the deployment : Use kubectl apply -f my-akka-http-app-deployment.yaml.

6. Expose the service : Create a service YAML file to expose the deployment externally, then use kubectl apply -f my-akka-http-app-service.yaml.

apiVersion: v1
kind: Service
metadata:
  name: my-akka-http-app
spec:
  selector:
    app: my-akka-http-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: LoadBalancer?