Alex Stuart shows how to fail over SSISDB in SQL Server 2012 or 2014:
Hopefully not many people are still configuring SSIS instances on SQL 2012 or 2014 – especially HA instances – but if you are, this post is for you.
If you’re running SQL Server 2016 or above, having the SSIS catalog function correctly in an AG is supported by built-in functionality to manage the DMK (database master key). In 2012/2014 however there is no such support. Without intervention this makes SSISDB unable to be opened after a failover, because the DMK isn’t open – leading to errors such as “Please create a master key in the database or open the master key in the session before performing this operation.”
Read on to see how to resolve this error, and then how to do this automatically.