Launching an Amazon ECS Linux container instance - Amazon Elastic Container Service

Launching an Amazon ECS Linux container instance

Your Amazon ECS container instances are created using the Amazon EC2 console. Before you begin, be sure that you've completed the steps in Set up to use Amazon ECS.

To launch a container instance

  1. Open the Amazon EC2 console at

  2. From the navigation bar, select the Region to use.

  3. From the EC2 Dashboard, choose Launch instance.

  4. On the Choose an Amazon Machine Image (AMI) page, complete the following steps:

    1. Choose AWS Marketplace.

    2. Choose an AMI for your container instance. You can search for one of the Amazon ECS-optimized AMIs, for example the Amazon ECS-Optimized Amazon Linux 2 AMI. If you do not choose an Amazon ECS-optimized AMI, you must follow the procedures in Installing the Amazon ECS container agent.

      For more information on the latest Amazon ECS-optimized AMIs, see Amazon ECS-optimized AMI.


      The Amazon ECS-optimized Amazon Linux AMI is deprecated as of April 15, 2021. After that date, Amazon ECS will continue providing critical and important security updates for the AMI but will not add support for new features.

  5. On the Choose an Instance Type page, you can select the hardware configuration of your instance. The t2.micro instance type is selected by default. The instance type that you select determines the resources available for your tasks to run on.

    Choose Next: Configure Instance Details when you are done.

  6. On the Configure Instance Details page, complete the following steps:

    1. Set the Number of instances field depending on how many container instances you want to add to your cluster.

    2. (Optional) To use Spot Instances, for Purchasing option, select the check box next to Request Spot Instances. You also need to set the other fields related to Spot Instances. For more information, see Spot Instance Requests.


      If you are using Spot Instances and see a Not available message, you may need to choose a different instance type.

    3. For Network, choose the VPC into which to launch your container instance.

    4. For Subnet, choose a subnet to use, or keep the default option to choose the default subnet in any Availability Zone.

    5. Set the Auto-assign Public IP field depending on whether you want your instance to be accessible from the public internet. If your instance should be accessible from the internet, verify that the Auto-assign Public IP field is set to Enable. If not, set this field to Disable.


      Container instances need access to communicate with the Amazon ECS service endpoint. This can be through an interface VPC endpoint or through your container instances having public IP addresses.

      For more information about interface VPC endpoints, see Amazon ECS interface VPC endpoints (AWS PrivateLink).

      If you do not have an interface VPC endpoint configured and your container instances do not have public IP addresses, then they must use network address translation (NAT) to provide this access. For more information, see NAT gateways in the Amazon VPC User Guide and HTTP proxy configuration in this guide. For more information, see Create a virtual private cloud..

    6. Select your container instance IAM role. This is usually named ecsInstanceRole.


      If you do not launch your container instance with the proper IAM permissions, your Amazon ECS agent cannot connect to your cluster. For more information, see Amazon ECS container instance IAM role.

    7. (Optional) Configure your Amazon ECS container instance with user data, such as the agent environment variables from Amazon ECS container agent configuration. Amazon EC2 user data scripts are executed only one time, when the instance is first launched. The following are common examples of what user data is used for:

      • By default, your container instance launches into your default cluster. To launch into a non-default cluster, choose the Advanced Details list. Then, paste the following script into the User data field, replacing your_cluster_name with the name of your cluster.

        #!/bin/bash echo ECS_CLUSTER=your_cluster_name >> /etc/ecs/ecs.config
      • If you have an ecs.config file in Amazon S3 and have enabled Amazon S3 read-only access to your container instance role, choose the Advanced Details list. Then, paste the following script into the User data field, replacing your_bucket_name with the name of your bucket to install the AWS CLI and write your configuration file at launch time.


        For more information about this configuration, see Storing container instance configuration in Amazon S3.

        #!/bin/bash yum install -y aws-cli aws s3 cp s3://your_bucket_name/ecs.config /etc/ecs/ecs.config
      • Specify tags for your container instance using the ECS_CONTAINER_INSTANCE_TAGS configuration parameter. This creates tags that are associated with Amazon ECS only, they cannot be listed using the Amazon EC2 API.


        If you launch your container instances using an Amazon EC2 Auto Scaling group, then you should use the ECS_CONTAINER_INSTANCE_TAGS agent configuration parameter to add tags. This is due to the way in which tags are added to Amazon EC2 instances that are launched using Auto Scaling groups.

        #!/bin/bash cat <<'EOF' >> /etc/ecs/ecs.config ECS_CLUSTER=your_cluster_name ECS_CONTAINER_INSTANCE_TAGS={"tag_key": "tag_value"} EOF
      • Specify tags for your container instance and then use the ECS_CONTAINER_INSTANCE_PROPAGATE_TAGS_FROM configuration parameter to propagate them from Amazon EC2 to Amazon ECS

        The following is an example of a user data script that would propagate the tags associated with a container instance, as well as register the container instance with a cluster named your_cluster_name:

        #!/bin/bash cat <<'EOF' >> /etc/ecs/ecs.config ECS_CLUSTER=your_cluster_name ECS_CONTAINER_INSTANCE_PROPAGATE_TAGS_FROM=ec2_instance EOF

      For more information, see Bootstrapping container instances with Amazon EC2 user data.

    8. Choose Next: Add Storage.

  7. On the Add Storage page, configure the storage for your container instance.

    If you are using the Amazon ECS-optimized Amazon Linux 2 AMI, your instance has a single 30 GiB volume configured, which is shared between the operating system and Docker.

    If you are using the Amazon ECS-optimized AMI, your instance has two volumes configured. The Root volume is for the operating system's use, and the second Amazon EBS volume (attached to /dev/xvdcz) is for Docker's use.

    You can optionally increase or decrease the volume sizes for your instance to meet your application needs.

    When done configuring your volumes, choose Next: Add Tags.

  8. On the Add Tags page, specify tags by providing key and value combinations for the container instance. Choose Add another tag to add more than one tag to your container instance. For more information resource tags, see Resources and tags.

    Choose Next: Configure Security Group when you are done.

  9. On the Configure Security Group page, use a security group to define firewall rules for your container instance. These rules specify which incoming network traffic is delivered to your container instance. All other traffic is ignored. Select or create a security group as follows, and then choose Review and Launch.

  10. On the Review Instance Launch page, under Security Groups, you see that the wizard created and selected a security group for you. Instead, select the security group that you created in Set up to use Amazon ECS using the following steps:

    1. Choose Edit security groups.

    2. On the Configure Security Group page, select the Select an existing security group option.

    3. Select the security group you created for your container instance from the list of existing security groups, and choose Review and Launch.

  11. On the Review Instance Launch page, choose Launch.

  12. In the Select an existing key pair or create a new key pair dialog box, choose Choose an existing key pair, then select the key pair that you created when getting set up.

    When you are ready, select the acknowledgment field, and then choose Launch Instances.

  13. A confirmation page lets you know that your instance is launching. Choose View Instances to close the confirmation page and return to the console.

  14. On the Instances screen, you can view the status of your instance. It takes a short time for an instance to launch. When you launch an instance, its initial state is pending. After the instance starts, its state changes to running, and it receives a public DNS name. If the Public DNS column is hidden, choose Show/Hide, Public DNS.