Upgrade Horizon

  1. Stop the Horizon resource in Pacemaker:

     pcs resource disable horizon-clone

  2. Wait until the output of pcs status shows that the service has stopped running.

  3. Upgrade the relevant packages:

     yum upgrade httpd 'openstack-dashboard*' \
   'python-django*'

  4. Reload systemd to account for updated unit files:

     systemctl daemon-reload

  5. Correct the Horizon configuration

  6. Restart the Horizon resource in Pacemaker:

     pcs resource enable horizon-clone

  7. Wait until the output of pcs status shows that the above resource is running.