AWS ECS Deployer Utility

This tool helps simplify automated docker deployments to Amazon's ECS. In short the tool will:

1. Perform a number of pre-checks that all resources are ready to be released.
2. Register a new task definition revision with ECS.
3. Update one or more services with the new revision.
4. Scale your auto-scaling group up, so that the new revision can be deployed. This is optional.
5. Wait for ECS to complete the deploy.
6. Scale your auto-scaling group back down to normal size. This is optional.

Getting Started

npm install ecs-deployer --save

Configuration

Under the hood we are using the NodeJS AWS SDK. You can configure your credentials several ways.

The AWS Region must be configured via an environment variable. Make sure to set AWS_REGION to whatever AWS region your resources are located in.

The user should have the following policy attached:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "ecs:DescribeClusters",
                "ecs:DescribeServices",
                "ecs:DescribeTaskDefinition",
                "ecs:DescribeTasks",
                "ecs:ListServices",
                "ecs:ListTaskDefinitions",
                "ecs:ListTasks",
                "ecs:RegisterTaskDefinition",
                "ecs:UpdateService",
                "autoscaling:DescribeAutoScalingGroups",
                "autoscaling:SetDesiredCapacity"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

Usage

A sample deploy:

var EcsDeployer = require('ecs-deployer')

var deployer = new EcsDeployer({
  docker: {
    type: 'quay', // supported: 'quay' or 'none' (checking bypassed)
    url: 'https://quay.io/username/image-name',
    auth: ''
  },

  services: [
    {
      taskDefinition: {
        "family": "foo" // This should already exist in ECS. Required.
      },

      name: 'my-web-service', // ECS service name. Required.
      cluster: 'web', // ECS cluster name. Required.
      autoScaling: {
        name: 'my-web-autoscaling-group' // Optional
      }
    }
  ]
});

// Call deploy and give a version to deploy
deployer.deploy('1.0.0').then(function() {
  console.log('Successfully deployed')
}, function(err) {
  console.error('Failed to deploy');
  console.error(err)
});

// Optionally subscribe to progress events.
deployer.on('progress', function(e) {
  console.log(e.service.name, e.msg);
})

Current limitations

• Only supports checking image tags for Quay.io
• Assumes a single region deployment.
• Assumes that all container definitions within a task definition should be updated with the given version string.