Using aws ecs with account

Question

Pulumi · Accepted Answer

To set up AWS ECS with your AWS account using Pulumi, you'll first need to have your AWS credentials configured. This can typically be done through the AWS CLI with `aws configure`, which will set up your credentials and default region.

ECS (Amazon Elastic Container Service) is a highly scalable, fast container management service that makes it easy to run, stop, and manage Docker containers on a cluster. Your ECS cluster can run on AWS Fargate, which is serverless, or on EC2 instances that you manage.

Here's a step-by-step explanation followed by a Pulumi program in TypeScript to create an ECS cluster and run a simple container on it:

1. Define your ECS Cluster. An ECS cluster is a logical grouping of tasks or services.
2. Define your task definition. This is a blueprint for your application specifying what container images to use, CPU and memory requirements, and more.
3. Define your service. This will maintain a specified number of instances of the task definition running in your cluster.
4. If you're using EC2 instances, you'll additionally define an EC2 launch configuration and an Auto Scaling group.

Now, let's look at the Pulumi program. Remember to install the required packages by running `npm install @pulumi/aws @pulumi/awsx` before executing the program.

```typescript
import * as aws from '@pulumi/aws';
import * as awsx from '@pulumi/awsx';

// Create an ECS cluster. You can reference an existing cluster by its name or create a new one.
const cluster = new awsx.ecs.Cluster('my-ecs-cluster', {});

// Define the ECS Task Definition. This is where you configure the Docker container and resource constraints.
const taskDefinition = new awsx.ecs.FargateTaskDefinition('my-task-def', {
    container: {
        image: 'amazon/amazon-ecs-sample', // Just a simple test image from Amazon's public ECR.
        cpu: 256, // 256 units = 0.25 vCPUs.
        memory: 512, // 512MB.
        portMappings: [{ containerPort: 80, hostPort: 80 }],
    },
});

// Create a Fargate Service. This service will maintain a desired count of tasks in your cluster.
const service = new awsx.ecs.FargateService('my-service', {
    cluster: cluster,
    taskDefinition: taskDefinition,
    desiredCount: 1, // Start with one instance of the container.
});

// Export the URL of the service. The application within the container should be listening on port 80.
export const url = cluster.cluster.endpoint;

```

In this program:

- We import the Pulumi AWS and AWSX libraries to interact with AWS resources.
- We instantiate an ECS cluster, a task definition with a simple public Docker image, and finally, a Fargate service, suggesting that we want AWS to manage the underlying infrastructure (serverless).
- The `desiredCount` for the service is set to 1, indicating we want to run one instance of our application at all times.
- The `url` export at the bottom will give the endpoint of the ECS cluster which can be used to access deployed services.

After running this Pulumi program with the `pulumi up` command, you will have an ECS cluster and a task definition, and a service running on AWS Fargate.

Please note that this is a very basic example and doesn't include best practices like specifying custom VPC or Subnets, which are recommended for a production setup.