Amazon ECS EventBridge IAM Role

Before you can use Amazon ECS scheduled tasks with EventBridge rules and targets, the EventBridge service needs permissions to run Amazon ECS tasks on your behalf. These permissions are provided by the EventBridge IAM role (ecsEventsRole).

The AmazonEC2ContainerServiceEventsRole policy is shown below.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": ["ecs:RunTask"],
            "Resource": ["*"]
        },
        {
            "Effect": "Allow",
            "Action": "iam:PassRole",
            "Resource": ["*"],
            "Condition": {
                "StringLike": {"iam:PassedToService": "ecs-tasks.amazonaws.com"}
            }
        },
        {
            "Effect": "Allow",
            "Action": "ecs:TagResource",
            "Resource": "*",
            "Condition": {
                "StringEquals": {
                    "ecs:CreateAction": ["RunTask"]
                }
            }
        }
    ]
}

If your scheduled tasks require the use of the task execution role, a task role, or a task role override, then you must add iam:PassRole permissions for each task execution role, task role, or task role override to the EventBridge IAM role. For more information about the task execution role, see Amazon ECS task execution IAM role.

Note

Specify the full ARN of your task execution role or task role override.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "iam:PassRole",
            "Resource": ["arn:aws:iam::<aws_account_id>:role/<ecsTaskExecutionRole_or_TaskRole_name>"]
        }
    ]
}

You can choose to let the AWS Management Console create the EventBridge role for you when you configure a scheduled task. For more information, see Using Amazon EventBridge Scheduler to schedule Amazon ECS tasks .

Creating the EventBridge role

Replace all user input with your own information.

1. Create a file named eventbridge-trust-policy.json that contains the trust policy to use for the IAM role. The file should contain the following:

   {
     "Version": "2012-10-17",
     "Statement": [
       {
         "Sid": "",
         "Effect": "Allow",
         "Principal": {
           "Service": "events.amazonaws.com"
         },
         "Action": "sts:AssumeRole"
       }
     ]
   }

2. Use the following command to create an IAM role named ecsEventsRole by using the trust policy that you created in the previous step.

   aws iam create-role \
         --role-name ecsEventsRole \
         --assume-role-policy-document file://eventbridge-trust-policy.json

3. Attach the AWS managed AmazonEC2ContainerServiceEventsRole to the ecsEventsRole role using the following command .

   aws iam attach-role-policy \
         --role-name ecsEventsRole \
         --policy-arn arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceEventsRole

You can also use the IAM console's Custom trust policy workflow (https://console.aws.amazon.com/iam/) to create the role. For more information, see Creating a role using custom trust policies (console) in the IAM User Guide.

Attaching a policy to the ecsEventsRole role

You can use the following procedures to add permissions for the task execution role to the EventBridge IAM role.

AWS Management Console

To use the JSON policy editor to create a policy

1. Sign in to the AWS Management Console and open the IAM console at https://console.aws.amazon.com/iam/.

2. In the navigation pane on the left, choose Policies.

   If this is your first time choosing Policies, the Welcome to Managed Policies page appears. Choose Get Started.

3. At the top of the page, choose Create policy.

4. In the Policy editor section, choose the JSON option.

5. Enter the following JSON policy document:

   {
       "Version": "2012-10-17",
       "Statement": [
           {
               "Effect": "Allow",
               "Action": "iam:PassRole",
               "Resource": ["arn:aws:iam::<aws_account_id>:role/<ecsTaskExecutionRole_or_TaskRole_name>"]
           }
       ]
   }

6. Choose Next.

   Note

   You can switch between the Visual and JSON editor options anytime. However, if you make changes or choose Next in the Visual editor, IAM might restructure your policy to optimize it for the visual editor. For more information, see Policy restructuring in the IAM User Guide.

7. On the Review and create page, enter a Policy name and a Description (optional) for the policy that you are creating. Review Permissions defined in this policy to see the permissions that are granted by your policy.

8. Choose Create policy to save your new policy.

After you create the policy, attach the policy to the EventBridge role. For information about how to attach the policy to the role, see Update permissions for a role in the AWS Identity and Access Management User Guide.

AWS CLI

Replace all user input with your own information.

1. Create a file called ev-iam-passrole.json with the following content.

   {
       "Version": "2012-10-17",
       "Statement": [
           {
               "Effect": "Allow",
               "Action": "iam:PassRole",
               "Resource": ["arn:aws:iam::<aws_account_id>:role/<ecsTaskExecutionRole_or_TaskRole_name>"]
           }
       ]
   }

2. Use the following AWS CLI command to create the IAM policy using the JSON policy document file.

   aws iam create-policy \
         --policy-name eventsTaskExecutionPolicy \
         --policy-document file://ev-iam-passrole.json

3. Retrieve the ARN of the IAM policy you created using the following command.

   aws iam list-policies --scope Local --query 'Policies[?PolicyName==`eventsTaskExecutionPolicy`].Arn'

4. Use the following command to attach the policy to the EventBridge IAM role by using the policy ARN.

   aws iam attach-role-policy \
         --role-name ecsEventsRole \
         --policy-arn arn:aws:iam:111122223333:aws:policy/eventsTaskExecutionPolicy