Easy methods to Deploy a Java Software in AWS ECS utilizing Terraform

With a purpose to deploy a Java utility into AWS ECS (Elastic Container Service) utilizing Terraform, we have to contemplate a couple of various things.

Step 1 – Java Software

Create a file known as HelloWorld.java and add the next code to it:

public class HelloWorld {
    public static void foremost(String[] args) {
        System.out.println("Good day, World!");
    }
}

We now have to construct our class as follows:

javac HelloWorld.java

As soon as that is achieved, we will package deal our utility right into a jar file:

jar cvf my-app.jar HelloWorld.class

Step 2 – Dockerfile

Subsequent create a file known as Dockerfile and duplicate the next code into it:

FROM openjdk:11-jre-slim

WORKDIR /app

COPY goal/my-app.jar /app

CMD ["java", "-jar", "my-app.jar"]

Notice that goal/my-app.jar on this code is the relative path from the Dockerfile to the my-app.jar that we packaged in step 1 above.

Step 3 – Terraform

Subsequent we are going to deal with the Terraform. To do that, we will both create completely different Terraform information, however on this instance, we are going to merely create a single file known as foremost.tf.

On this file, we are going to first create an ECS process definition:

useful resource "aws_ecs_task_definition" "my_task_definition" {
  household                   = "my-task-definition"
  container_definitions    = jsonencode([
    {
      name      = "my-container"
      image     = "my-docker-image"
      cpu       = 256
      memory    = 512
      portMappings = [
        {
          containerPort = 8080
          hostPort      = 8080
        }
      ]
    }
  ])
}

Adopted by an ECS service:

useful resource "aws_ecs_service" "my_service" {
  identify            = "my-service"
  cluster         = aws_ecs_cluster.my_cluster.id
  task_definition = aws_ecs_task_definition.my_task_definition.arn
  desired_count   = 1

  network_configuration {
    subnets          = [aws_subnet.my_subnet.id]
    security_groups  = [aws_security_group.my_security_group.id]
    assign_public_ip = true
  }
}

Step 4 – Operating the Terraform

Now we have to run the Terraform code, which we will do from the terminal as follows:

terraform init
terraform apply