How to rollback a blue/green deployment of an AWS RDS MySQL database

To Nha Notes | Dec. 29, 2023, 4:23 p.m.

To rollback a blue/green deployment of an AWS RDS MySQL database, you can follow these steps:

1. Determine the rollback strategy:

   • Decide whether you want to rollback to the "blue" environment or the previous snapshot of the database.
   • If you have an RDS read replica for the "green" environment, you can choose to switch traffic back to the "blue" environment by updating your application configuration.
   • If you have taken a DB snapshot before the deployment, you can choose to restore the database from that snapshot.

2. Rollback to the "blue" environment:

   • If you want to rollback to the "blue" environment, update your application configuration to use the RDS instance details of the "blue" environment.
   • Monitor the application and verify that it is functioning as expected.
   • Ensure any changes made in the "green" environment are properly reverted in the "blue" environment.

3. Restore from the previous snapshot:

   • If you want to rollback to the previous snapshot of the database, follow these steps:
     • Create a new RDS instance using the previous snapshot.
     • Update your application configuration to use the RDS instance details of the restored database.
     • Test your application and verify that it is functioning correctly with the restored data.

4. Verify data consistency:

   • If you have made any changes in the "green" environment that are not reflected in the "blue" environment or the previous snapshot, you may need to manually reconcile the data.
   • Compare the data between the "green" environment, the "blue" environment, and the previous snapshot to ensure data consistency.
   • Consider any data migration or synchronization processes that may be required.

5. Monitor and test:

   • Monitor the application in the rolled-back environment to ensure it continues to function properly.
   • Perform thorough testing to validate the correct functioning of the application and data integrity.

Note that the rollback process may vary depending on your specific deployment setup and requirements. It's important to plan and test the rollback process in advance to ensure a smooth rollback in case of any issues during the blue/green deployment.