We want to know if there are any open/known issues that we may face post-migration of the DB cluster from centos7/RHEL7/OEL7 to RHEL8.
Depends on the method you choose to perform this migration ? If you are using pg_dump and pg_restore for the initial data copy,
followed by logical replication, then, it should be technically okay.
We came across one issue regarding collation(https://wiki.postgresql.org/wiki/Locale_data_changes), the solution for which is to reindex or use logical replication. In a similar way, we want to understand if there are any other known issues that the community should be aware of.
