[UPDATE]
I have now been able to install postgresql95 and postgresql95-server on Rockstor. I had to manually install the repository with:
rpm -Uvi https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
That seemed to force the repository to be installed. I then had to:
#vi /etc/yum.repos.d
and remove all repository references that did not relate to postgresql 9.5. I then modified that base URL of the reference to be exactly what the postgresql.org website links to. After that I tried to:
yum install postgresql95 postgresql95-server
and the installation worked.
I have also been able to
systemctl enable postgresql-9.5
and then also
systemctl start postgresql-9.5
once that /var/lib/pgsql/9.5/data/pg_hba.conf was modified so that Postgresql 9.5 was listening on port 5431 instead of 5432.
At this point I think the only thing stopping me from connecting to the database is the fact that I don’t know what the default password is for the postgres user in Rocktor. Once I know that I will be able to create another super user for the PSQL shell and then I believe I should have a working Postgresql 9.5 on Rockstor.
Anyone know what the postgres password is? 