While we’d always recommend using your automated deployment system to reinstall systems from scratch, sometimes you do need to remove OpenStack from a system the hard way. Here’s how:
Remove all packages.
Remove remaining files.
These steps depend on your underlying distribution, but in general you should be looking for purge commands in your package manager, like aptitude purge ~c $package. Following this, you can look for orphaned files in the directories referenced throughout this guide. To uninstall the database properly, refer to the manual appropriate for the product in use.