11.3. Upgrading Remote Databases from PostgreSQL 9.5 to 10

Red Hat Virtualization 4.3 uses PostgreSQL 10 instead of PostgreSQL 9.5. If your databases are installed locally, the upgrade script automatically upgrades them from version 9.5 to 10. However, if either of your databases (Manager or Data Warehouse) is installed on a separate machine, you must perform the following procedure on each remote database before upgrading the Manager.

  1. Stop the service running on the machine:

    • Stop the ovirt-engine service on the Manager machine: 

      # systemctl stop ovirt-engine

    • Stop the ovirt-engine-dwh service on the Data Warehouse machine: 

      # systemctl stop ovirt-engine-dwhd

  2. Enable the required repository to receive the PostgreSQL 10 package:

    Enable either the Red Hat Virtualization Manager repository: 

    # subscription-manager repos --enable=rhel-7-server-rhv-4.3-manager-rpms

    or the SCL repository: 

    # subscription-manager repos --enable rhel-server-rhscl-7-rpms

  3. Install the PostgreSQL 10 packages: 

    # yum install rh-postgresql10 rh-postgresql10-postgresql-contrib

  4. Stop and disable the PostgreSQL 9.5 service: 

    # systemctl stop rh-postgresql95-postgresql
# systemctl disable rh-postgresql95-postgresql

  5. Upgrade the PostgreSQL 9.5 database to PostgreSQL 10: 

    # scl enable rh-postgresql10 -- postgresql-setup --upgrade-from=rh-postgresql95-postgresql --upgrade

  6. Start and enable the rh-postgresql10-postgresql.service and check that it is running: 

    # systemctl start rh-postgresql10-postgresql.service
# systemctl enable rh-postgresql10-postgresql.service
# systemctl status rh-postgresql10-postgresql.service

    Ensure that you see output similar to the following: 

    rh-postgresql10-postgresql.service - PostgreSQL database server
   Loaded: loaded (/usr/lib/systemd/system/rh-postgresql10-postgresql.service;
enabled; vendor preset: disabled)
   Active: active (running) since ...

  7. Copy the pg_hba.conf client configuration file from the PostgreSQL 9.5 environment to the PostgreSQL 10 environment: 

    # cp -p /var/opt/rh/rh-postgresql95/lib/pgsql/data/pg_hba.conf  /var/opt/rh/rh-postgresql10/lib/pgsql/data/pg_hba.conf

  8. Update the following parameters in /var/opt/rh/rh-postgresql10/lib/pgsql/data/postgresql.conf: 

    listen_addresses='*'
autovacuum_vacuum_scale_factor=0.01
autovacuum_analyze_scale_factor=0.075
autovacuum_max_workers=6
maintenance_work_mem=65536
max_connections=150
work_mem = 8192

  9. Restart the PostgreSQL 10 service to apply the configuration changes: 

    # systemctl restart rh-postgresql10-postgresql.service

  10. Start the ovirt-engine-dwhd service: 

    # systemctl start ovirt-engine-dwhd

You can now update the Manager to the latest version of 4.2.