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upgrade-1-ha.md

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Scenario 1-HA: HA All-at-once upgrade

In this scenario, you will take down all of your OpenStack services at the same time, and will not bring them back up until the upgrade process is complete.

On all of your hosts:

  1. Install the Juno yum repository.

Update your controllers:

  1. Stop all your OpenStack services.

  2. Perform a complete upgrade of all packages on all your controllers:

     # yum upgrade

On a single controller:

  1. Restart MariaDB and associated HA resources

  2. Perform database schema upgrades for all of your services.

  3. Review newly installed configuration files.

    The upgraded packages will have installed .rpmnew files appropriate to the Juno version of the service. In general, the Juno services will run using the configuration files from your Icehouse deployment, but you will want to review the .rpmnew files for any required changes.

  4. Manually stop the MariaDB service:

    # systemctl stop mysqld

  5. Start all your OpenStack services.

  6. Undo the edits you made to /etc/my.cnf.d/galera.conf

Update your compute nodes:

  1. Stop all your OpenStack services.

  2. Perform a complete upgrade all all packages on all compute hosts:

    # yum upgrade

  3. Review newly installed configuration files.

  4. Restart all your OpenStack services.