Overview

After applying the Cloud Stack v7 update to their MySQL database, customers may experience a series of issues. These can include connection problems with the MySQL database, SSL connection errors when trying to connect via SSH, and missing database tables. Despite attempts to resolve these issues, such as using the 'mysqladmin flush-hosts' command, regenerating SSL keys, or restoring from a backup, the problems may persist. Additionally, customers may struggle to access and utilize a snapshot to recover lost data.

Solution

To resolve the issue of accessing and utilizing a snapshot to recover lost data, follow these steps:

1. Clone the environment.
2. Identify the snapshot and make it available in the new clone through a volume created in the backend.
3. Stop the DB engine on the environment created in step 1.
4. Unmount the DB volume (record the device name from the Linux mount table).
5. Mount the volume from step 2 into the cloned db instance.
6. Start the DB engine.
7. Check if the DB engine is up - it should be running from the snapshot at this point.

Note: Some steps can only be performed by the Engine Yard Support Team. Therefore, you need to inform them once you have cloned the environment and chosen a snapshot. They will then detach the clone environment instance's original volume and create and attach a new volume based on your selected snapshot.

Summary

After a Cloud Stack v7 update, customers may encounter various MySQL database issues. These can be resolved by cloning the environment, identifying the snapshot, stopping and unmounting the DB engine, and mounting the volume from the snapshot into the cloned DB instance. The Engine Yard Support Team can assist with some of these steps.

FAQ

1. What do I do if I encounter connection issues with my MySQL database after a Cloud Stack v7 update?
   Follow the steps outlined in the solution above. If the issues persist, contact the Engine Yard Support Team for further assistance.
2. How can I recover lost data after a Cloud Stack v7 update?
   You can recover lost data by accessing and utilizing a snapshot. Follow the steps in the solution above to do this.
3. What role does the Engine Yard Support Team play in resolving these issues?
   The Engine Yard Support Team can assist with detaching the clone environment instance's original volume and creating and attaching a new volume based on your selected snapshot.