@Marvin Made an ECS deployment with Prefect push workpool. When running the flow, got this errror:

Flow run could not be submitted to infrastructure: An error occurred (AccessDeniedException) when calling the RegisterTaskDefinition operation: User: arn:aws:iam::...:user/prefect-job-trigger is not authorized to perform: ecs:RegisterTaskDefinition on resource: arn:aws:ecs:ca-central-1:...:task-definition/prod-task-definitions:* because no identity-based policy allows the ecs:RegisterTaskDefinition action

The error message you're encountering indicates that the IAM user

prefect-job-trigger

does not have the necessary permissions to register ECS task definitions. This is often due to missing or incorrect IAM policies attached to the user. Here's how you can address this issue: 1. Update IAM Policies: You need to attach a policy to the IAM user allowing the

ecs:RegisterTaskDefinition

action. This can be done through the AWS Management Console or by using AWS CLI. 2. Example Policy: Below is an example of a JSON policy document granting the required permissions:

json
   {
     "Version": "2012-10-17",
     "Statement": [
       {
         "Effect": "Allow",
         "Action": "ecs:RegisterTaskDefinition",
         "Resource": "*"
       }
     ]
   }

You can restrict the

Resource

to specific task definition ARNs if needed for tighter security. 3. Attach the Policy: Make sure this policy is either added directly to the user or through a group to which the user belongs. After updating the permissions, try running your Prefect flow again. If you're still having issues, double-check your AWS credentials and configurations, ensuring that the user

prefect-job-trigger

is the one being used to authenticate your ECS requests. For more specific guidance on Prefect versions and possible documentation that may help, please let me know your Prefect version. This will allow us to look into Prefect-specific ECS deployment guides or related GitHub issues.

@Marvin prefect 2.20.7

It looks like you are using Prefect version 2.20.7, and your issue is related to insufficient IAM permissions for executing ECS operations. According to the Prefect documentation on deploying to ECS, it's recommended to attach the

AmazonECS_FullAccess

permissions to the IAM user for managing ECS tasks and resources. Here's a concise guide to resolving your current issue: 1. Assign Required Permissions: Attach the

AmazonECS_FullAccess

managed policy to your IAM user. This policy includes permissions for registering task definitions, which are necessary for ECS deployments using Prefect. 2. IAM Policy Update: - Go to the AWS IAM Console. - Find and select the user

prefect-job-trigger

. - Attach the

AmazonECS_FullAccess

managed policy to this user. 3. Alternative Policies: If you prefer more granular control over permissions, you can create a custom policy including at least the

ecs:RegisterTaskDefinition

action. Once these changes are made, your flow should be able to run without the

AccessDeniedException

. For more information, you can refer to: - Prefect ECS Integration Guide If you encounter further issues, please feel free to reach out!

@Marvin I have already attached the

AmazonECSTaskExecutionRolePolicy

to the

ecsTaskExecutionRole

, which I specify in the workpool in Prefect UI. Do I also need to attach

AmazonECS_FullAccess

to it?

The

AmazonECSTaskExecutionRolePolicy

is typically used by ECS tasks to interact with AWS services such as retrieving secrets or pulling container images, and not for registering task definitions. In your case, since the error you're experiencing is related to the

RegisterTaskDefinition

action, these permissions need to be granted to the IAM user or role that's being used to perform the deployment through Prefect. Here’s a breakdown of what’s needed: 1. IAM User/Role for Deployment: - The IAM user or role that Prefect uses to register ECS task definitions must have permissions to perform the

ecs:RegisterTaskDefinition

action. This is typically handled by attaching a policy like

AmazonECS_FullAccess

. 2. ecsTaskExecutionRole: - This role is specifically for tasks once they are running and typically would not need

RegisterTaskDefinition

permissions unless your setup dynamically modifies task definitions. It is intended for tasks to be able to pull images and log information. 3. Recommended Actions: - Ensure that the IAM entity (user or role) that Prefect uses to interact with AWS has the necessary permissions for ECS operations. This might need the

AmazonECS_FullAccess

policy, especially if you're registering new task definitions into ECS as part of the deployment process. If you have already confirmed that the appropriate user or role being used by Prefect has the

AmazonECS_FullAccess

permission and you're still encountering issues, double-check that the AWS credentials used in your Prefect deployment correctly correspond to that user or role. Feel free to update your setup accordingly, and let me know if you have any further questions or issues!

@Kevin Grismore Hi, could you please advise? What is the role that Prefect uses to register ECS task definitions. Since I'm using push workpool, isn't Prefect auto creating ecs task definitions?

The roles and permissions associated with ECS deployments can be a bit tricky since they serve different purposes: 1. AmazonECSTaskExecutionRolePolicy: - This policy is typically used by ECS tasks themselves to perform actions like pulling container images and accessing secrets. It is attached to the

ecsTaskExecutionRole

, which is specified in the task definition. 2. AmazonECS_FullAccess for Deployment: - The

AmazonECS_FullAccess

policy is not generally required for the

ecsTaskExecutionRole

. Instead, this policy would typically be needed for the IAM user or role that is performing the deployment operations. - This policy allows the deployment process, which includes registering task definitions, managing tasks, and more. Since your error is related to a permission issue with registering task definitions (

RegisterTaskDefinition

), it is important that the IAM entity (user or role) used by Prefect to execute the

RegisterTaskDefinition

operation has this permission. ### Here's What You Should Consider: 1. Deployment IAM User/Role: - Ensure that the IAM user or role used to authenticate your ECS deployment in Prefect has appropriate permissions such as

AmazonECS_FullAccess

or a custom policy that includes

ecs:RegisterTaskDefinition

. - Check the AWS credentials configured in the Prefect work pool to see if they are tied to a user or role with these permissions. 2. Task Execution Role: - The

ecsTaskExecutionRole

specified in the task definition can remain as is, typically with

AmazonECSTaskExecutionRolePolicy

or necessary custom permissions. - There is generally no need to attach

AmazonECS_FullAccess

to this role, as it is not responsible for registering task definitions. If you've already configured the

ecsTaskExecutionRole

correctly for its purpose but are facing issues in the deployment phase, focus on the permissions of the IAM user or role involved in deploying and interacting with ECS resources from Prefect. Please let me know if you have further questions or need additional assistance!

@Marvin Who is the IAM user or role that is performing the deployment operations? Isn't it Prefect?

In the context of using Prefect to manage ECS deployments, the IAM user or role performing the deployment operations is determined by the credentials used to configure Prefect's access to AWS services. Here's a breakdown of how this typically works: 1. Prefect's AWS Interaction: - Prefect itself does not act as an IAM user or role. Instead, it utilizes AWS credentials that you provide to interact with AWS services. - These credentials are usually linked to either an IAM User or an IAM Role, and they dictate what Prefect is authorized to do on AWS. 2. Potential Credential Sources: - Environment Variables: AWS credentials might be set in the environment where Prefect is running (using

AWS_ACCESS_KEY_ID

and

AWS_SECRET_ACCESS_KEY

). - AWS CLI Configuration: Credentials may be configured via the AWS CLI on the machine running Prefect. - IAM Role: If Prefect is running on an EC2 instance or other AWS service that supports IAM Roles, it might assume a role that grants the necessary permissions. 3. Steps to Identify: - Check the configuration used to set up AWS access in your Prefect environment or deployment. Look for environment variables, AWS profiles, or IAM Roles assumed by the infrastructure running Prefect. - Verify that this user or role has the necessary permissions, including

ecs:RegisterTaskDefinition

. 4. Aligning Permissions: - Ensure that the IAM entity associated with the AWS credentials used by Prefect has the required permissions to manage ECS tasks and register task definitions. This might involve adding or confirming

AmazonECS_FullAccess

, or crafting a custom policy. By ensuring the above, you'll effectively authorize Prefect, through its use of credentials, to perform ECS-related operations as necessary. If you're unsure about the credentials, consider tracing how Prefect is deployed and interacts with AWS to pinpoint the associated IAM user or role. Feel free to ask if you need further clarification or assistance on any of these steps!