Challenges with IAM Role Permissions for RDS in AWS during Security Implementation
I'm migrating some code and I'm following best practices but I'm dealing with This might be a silly question, but Working on a project where we are deploying a PostgreSQL RDS instance on AWS, I need to ensure that our IAM roles are correctly configured for secure access... While creating the IAM policy, I aimed to allow specific actions for a certain set of users but ran into issues with permissions errors. Here’s the policy I initially set up: ```json { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "rds:DescribeDBInstances", "rds:Connect" ], "Resource": "*" } ] } ``` This grants access to describing RDS instances, but I want to restrict users to only accessing our specific instance. I tried updating the policy to specify the resource using its ARN: ```json { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "rds:DescribeDBInstances", "rds:Connect" ], "Resource": "arn:aws:rds:us-west-2:123456789012:db:my-database" } ] } ``` Yet, users still report access issues indicating they cannot connect. Additionally, I learned that linking this IAM role to our Lambda function, which processes database queries, is essential. I set this up, but errors persisted, and the CloudWatch logs show: ``` User: arn:aws:iam::123456789012:user/test-user is not authorized to perform: rds:Connect on resource: arn:aws:rds:us-west-2:123456789012:db:my-database ``` To troubleshoot, I’ve checked the following: - Ensured the security groups allow inbound traffic from the necessary IPs. - Verified the IAM role is correctly attached to the Lambda function. - Examined the trust relationships in IAM to confirm if Lambda can assume the role. Despite trying to list out the actions more granularly or even adding `rds:DescribeDBInstances` alongside `rds:Connect` in separate statements, nothing seems to alleviate the permission issues. Could there be additional permissions or configurations I’m missing for secure access to an RDS instance? Any insights would be appreciated! For context: I'm using Json on Ubuntu. Thanks in advance! This is for a service running on Ubuntu 22.04. What's the best practice here? Am I missing something obvious? I'm using Json 3.11 in this project. The project is a service built with Json.