Update:
we completed the upgrade directly to v15, we used the codecentric helm chart and pointed to my postgres db that contains the data from v6, and the migration of the application and db went smoooth.
Just clone the charts and set the endpoint to your postgres, in the first run of new version there will be the db upgrade automatically.
We tested everything like multi realm, public client, private client, groups and roles and the upgrade didn’t affect anything.
The only 2 point to notice are:
- create an index that is the output of the db schema migration at the first startup of v15
- had to enable uploa-scripts funcionality with jdbc, to run script from admin console to i.e map groupsID(Alternative to Nashorn engine for Scripts?).
We also tested the themes from v6 to v15, as we mount it as init contianer/volumes and they worked without any change.