Container Orchestration with ECS and EKS

Containerization has become a popular approach for deploying applications, as it provides a lightweight and portable way to package software and its dependencies. AWS offers two services for container orchestration: Amazon Elastic Container Service (ECS) and Amazon Elastic Kubernetes Service (EKS).

Amazon ECS

Amazon ECS is a fully managed container orchestration service that allows you to easily run and scale containerized applications on AWS. It supports Docker containers and provides features such as service discovery, load balancing, and automatic scaling.

To use ECS, you need to define an ECS task definition that specifies the containers, resources, and networking configurations for your application. You then create an ECS cluster to run the tasks and manage the underlying infrastructure.

Here's an example of a simple ECS task definition using the AWS Management Console:

1{
2  "family": "my-task",
3  "networkMode": "awsvpc",
4  "executionRoleArn": "arn:aws:iam::0123456789:role/ecsTaskExecutionRole",
5  "containerDefinitions": [
6    {
7      "name": "my-container",
8      "image": "my-registry/my-image:latest",
9      "portMappings": [
10        {
11          "containerPort": 80
12        }
13      ]
14    }
15  ]
16}

Amazon EKS

Amazon EKS is a managed Kubernetes service that simplifies the deployment, management, and scaling of containerized applications using Kubernetes. With EKS, you can leverage the benefits of Kubernetes, such as declarative configuration, service discovery, and horizontal scaling.

To use EKS, you need to create an EKS cluster and configure worker nodes to run your containerized applications. Once the cluster is set up, you can use standard Kubernetes tools and APIs to deploy and manage your applications.

Here's an example of deploying a Kubernetes application on EKS using the kubectl command line tool:

1$ kubectl create deployment my-app --image=my-registry/my-image:latest
2$ kubectl expose deployment my-app --port=80

Both ECS and EKS provide reliable and scalable solutions for managing containerized applications in AWS. The choice between the two depends on your specific requirements and familiarity with Docker or Kubernetes.

Exercise: FizzBuzz with ECS or EKS

As a fun exercise, let's use ECS or EKS to run a simple FizzBuzz program. The program should print numbers from 1 to 100, replacing multiples of 3 with 'Fizz', multiples of 5 with 'Buzz', and multiples of both 3 and 5 with 'FizzBuzz'.

Here's a Java code snippet that implements the FizzBuzz logic:

1class Main {
2    public static void main(String[] args) {
3        for(int i = 1; i <= 100; i++) {
4            if(i % 3 == 0 && i % 5 == 0) {
5                System.out.println("FizzBuzz");
6            } else if(i % 3 == 0) {
7                System.out.println("Fizz");
8            } else if(i % 5 == 0) {
9                System.out.println("Buzz");
10            } else {
11                System.out.println(i);
12            }
13        }
14    }
15}

Modify the code to run it on ECS or EKS and observe the output. Have fun!

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class Main {

    public static void main(String[] args) {

        // Replace this with your ECS and EKS code

    }

}