Thanks for the detailed HowTo.
There is also an older HowTo for a MySQL Multi-Master-Setup here: Ubuntu 16.04 - privacyIDEA High Availability using MySQL Active/Active
You could avoid removing the database after the initial install on the second node by installing the privacyidea package which just contains the application. Of course the apache setup needs to be done ‘by-hand’ in this case.
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