Serverless Containers: Deploying Application On ECS and Fargate > Cluster Setup > Launch the Core Application

Launch the Core Application

Create the Core Application Task Definition

1. Navigate to Amazon Elastic Container Service (ECS) in the AWS Console.

2. In the left navigation pane, select Task definitions, then click Create new task definition.

3. Configure the basic settings:

Task definition family: fcj-core-fargate-td
Launch type: AWS Fargate

4. Set the resource allocation:

CPU: .25 vCPU
Memory: .5 GB

5. For Task execution role, select fcjEcsTaskExecutionRole.

6. Open a new browser tab and navigate to Amazon ECR. Locate your fcj-registry repository and copy the core image URI.

7. Return to the Create new task definition tab. In the Container details section, configure:

Name: core
Image URI: Paste the core image URI you copied from ECR

8. Configure the container networking:

Container port: 8080
Port name: core-http

9. Review your configuration and click Create to finalize the task definition.

Inject Secrets from AWS Secrets Manager

1. Open a new browser tab and navigate to the AWS Secrets Manager console. Locate your secret and copy its ARN.

2. Return to the ECS console. Navigate to Task definitions, select fcj-core-fargate-td, then click Create new revision with JSON.

3. In the JSON editor, locate the containerDefinitions array. Find the container definition with “name”: “core” and add the following secrets block:

Important: Replace <secret-arn> with the ARN you copied in step 1.

"secrets": [
    {
        "name": "SPRING_DATASOURCE_URL",
        "valueFrom": "<secret-arn>:DB_CONNECTION_STRING::"
    }
]

4. Your complete containerDefinitions should look like this:

"containerDefinitions": [
    {
        "name": "core",
        "image": "058264371769.dkr.ecr.ap-southeast-1.amazonaws.com/fcj-registry:core",
        "cpu": 0,
        "portMappings": [
            {
                "name": "core-http",
                "containerPort": 8080,
                "hostPort": 8080,
                "protocol": "tcp",
                "appProtocol": "http"
            }
        ],
        "essential": true,
        "environment": [],
        "mountPoints": [],
        "volumesFrom": [],
        "logConfiguration": {
            "logDriver": "awslogs",
            "options": {
                "awslogs-group": "/ecs/fcj-core-fargate-td",
                "mode": "non-blocking",
                "awslogs-create-group": "true",
                "max-buffer-size": "25m",
                "awslogs-region": "ap-southeast-1",
                "awslogs-stream-prefix": "ecs"
            }
        },
        "systemControls": [],
        "secrets": [
            {
                "name": "SPRING_DATASOURCE_URL",
                "valueFrom": "arn:aws:secretsmanager:ap-southeast-1:0123456789:secret:dev/fcj/momentum-75swok:DB_CONNECTION_STRING::"
            }
        ]
    }
]