AWS ECS Task scenarios to Start Due to Missing IAM Role Permissions for S3 Access
Quick question that's been bugging me - I'm currently working on an AWS ECS service that needs to pull configuration files from an S3 bucket at startup. However, I'm running into an scenario where the tasks unexpected result to start due to permission errors. The behavior message I'm receiving in the logs is: ``` AccessDenied: Access Denied ``` I've set up an IAM role for the ECS task with the following policy attached: ```json { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "s3:GetObject" ], "Resource": "arn:aws:s3:::my-bucket-name/*" } ] } ``` In addition to this, I have the task definition configured to use this IAM role, and I've verified that the task is indeed launching with the correct role. Here’s a snippet of my task definition: ```json { "family": "my-ecs-task", "containerDefinitions": [ { "name": "my-container", "image": "my-image:latest", "essential": true, "memory": 512, "cpu": 256, "environment": [ { "name": "BUCKET_NAME", "value": "my-bucket-name" } ] } ], "taskRoleArn": "arn:aws:iam::123456789012:role/my-ecs-task-role" } ``` I've also checked the S3 bucket policy, which allows access from the IAM role, but still no luck. To debug, I tried attaching the `AdministratorAccess` policy temporarily to the role, and the task started successfully. This leads me to believe it's a permissions scenario, but I need to pinpoint what's missing. Could there be any best practices or additional permissions that I'm overlooking? Any help would be appreciated! The project is a CLI tool built with Json. Any help would be greatly appreciated! I recently upgraded to Json LTS. Am I approaching this the right way?