Deploy Docker Containers on Amazon ECS
Introduction
Implementation
Set up your first run with Amazon ECS
The Amazon ECS first-run wizard will guide you through creating a cluster and launching a sample web application. In this step, you will enter the Amazon ECS console and launch the wizard.
1. Launch the first-run wizard
To launch the Amazon ECS first-run wizard, choose the Get started button. (If your layout looks different, disable the New ECS Experience toggle button at the top left of the console).
Create container and task definition
A task definition is like a blueprint for your application. In this step, you will specify a task definition so Amazon ECS knows which Docker image to use for containers, how many containers to use in the task, and the resource allocation for each container.
1. Select a task definition
In the Container definition field, select sample-app.
2. Review the default values
The task definition comes preloaded with default configuration values.
Review the default values and choose Next.
If you prefer to modify the configurations or would like to learn more, see Task definition parameters.
Define your service
Now that you have created a task definition, you will configure the Amazon ECS service. A service launches and maintains copies of the task definition in your cluster. For example, by running an application as a service, Amazon ECS will auto-recover any stopped tasks and maintain the number of copies you specify.
1. Review service options
Service options come preloaded with default configuration values.
Service name: The default sample-app-service is a web-based "Hello World" application provided by AWS. It is meant to run indefinitely; because it is running as a service, it will restart if the task becomes unhealthy or unexpectedly stops.
Number of desired tasks: Leave the default value of 1. This will create one copy of your task.
2. Review load balancing settings
Load balancing: You have the option to use a load balancer with your service. Amazon ECS can create an Elastic Load Balancing (ELB) load balancer to distribute the traffic across the container instances your task is launched on.
Select the Application Load Balancer option.
The default values for Load balancer listener port and Load balancer listener protocol are set up for the sample application. For more information on load balancing configuration, see Service load balancing.
Review your settings and choose Next.
Configure your cluster
Your Amazon ECS tasks run on a cluster, which uses AWS Fargate to provide the compute engine so that you do not need to manage servers. In this step, you will configure the cluster.
1. Set cluster name
In the Cluster name field, enter sample-cluster and choose Next.
Launch and view your resources
In the previous steps, you configured your task definition (which is like an application blueprint), the Amazon ECS service (which launches and maintains copies of your task definitions), and your cluster. In this step, you will review, launch, and view the resources you create.
1. Review task definition
You have a final chance to review your task definition, task configuration, and cluster configuration before launching. Choose Create.
2. View service status
You are on a Launch Status page that shows the status of your launch and describes each step of the process. After the launch is complete, choose View service.
Open the sample application
In this step, you will verify that the sample application is up and running by pointing your browser to the load balancer DNS name.
1. View details about the application
On the sample-app-service page, select the Details tab and select the entry under Target Group Name.
