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Troubleshooting DMS Migration Issues with AWS DevOps Agent

5 min read AWS DevOps BlogSep 4, 2026Reviewed for accuracy
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PractitionerHands-on experience recommended

Migration issues can derail your database projects, leading to downtime and data integrity concerns. The AWS DevOps Agent is designed to help you troubleshoot these issues effectively, ensuring your AWS DMS migrations run smoothly. By leveraging this tool, you can pinpoint root causes and validate your deployments with confidence.

The AWS DevOps Agent operates within AWS, connecting to the Model Context Protocol (MCP) server over HTTPS. It authenticates requests using AWS Signature Version 4 (SigV4). To deploy the MCP server, you can use AWS Lambda, which simplifies the architecture. The agent requires a few key parameters, such as the 'Region' where the MCP server is deployed, typically set to 'us-east-1'. You can initiate the deployment with commands like ./deploy.sh us-east-1 or clone the sample repository using git clone https://github.com/aws-samples/sample-dms-devops-mcp.git.

In production, ensure that your IAM roles are correctly configured. A common pitfall is receiving an HTTP 403 error during registration. This happens if the IAM role lacks permissions for both lambda:InvokeFunctionUrl and lambda:InvokeFunction. Always check these permissions to avoid unnecessary troubleshooting. Additionally, you need an active AWS DMS replication task set to migrate to Amazon Aurora PostgreSQL-Compatible Edition with data validation enabled, along with the AWS CLI v2 and Python 3.10 or later installed.

Key takeaways

  • Deploy the MCP server using AWS Lambda for streamlined troubleshooting.
  • Authenticate requests with AWS Signature Version 4 to ensure secure communication.
  • Verify IAM role permissions to prevent HTTP 403 errors during registration.
  • Use the AWS CLI v2 for deployment and configuration tasks.
  • Ensure data validation is enabled in your DMS replication task for accurate results.

Why it matters

In production, resolving migration issues quickly can minimize downtime and maintain data integrity. The AWS DevOps Agent provides essential insights that can save you hours of debugging.

Code examples

Bash
./deploy.sh us-east-1 --skip-register
Bash
git clone https://github.com/aws-samples/sample-dms-devops-mcp.git
Bash
./deploy.sh us-east-1

When NOT to use this

The official docs don't call out specific anti-patterns here. Use your judgment based on your scale and requirements.

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