Update Your Environment

Greyhound automatically updates your environment when you push new commits to your PR branch.

How Updates Work

When you push to a branch with an active environment:

1. Greyhound detects the synchronize webhook from GitHub
2. It re-reads your .greyhound/config.yaml from the latest commit
3. Builds are re-triggered with the new commit SHA
4. Services are updated with the new images
5. The PR comment is updated with the latest status

What Gets Updated

• Container images — Builds re-run with the new code
• Config changes — Changes to services, jobs, environment variables, and other config are applied
• New services — Adding a service to your config creates it in the environment
• Removed services — Removing a service from your config deletes it from the environment

What Stays the Same

• Databases — Aurora clusters are not recreated on updates. Your data persists across pushes.
• Persistent volumes — EFS-backed volumes retain their data.
• Namespace — The environment keeps the same namespace and URLs.