...

1. Run puppet with the zed modules/tags
2. Run apt dist-upgrade
3. Rerun puppet and restart the service (or simply reboot the host).
   1. systemctl restart ovsdb-server
   2. systemctl restart neutron-dhcp-agent.service neutron-l3-agent.service neutron-metadata-agent.service neutron-openvswitch-agent.service neutron-ovs-cleanup.service
4. Verify that routers on the node actually work.

Placement

1. Install one node at a time, either by reinstalling it using the zedmodules/tags or by folloing this list::
   1. Run puppet with zed modules/tags

   2. Run systemctl stop puppet apache2

   3. Run apt-get purge placement-api placement-common python3-placement && apt-get autoremove && apt-get dist-upgrade
   4. Run puppet again

Heat

The rolling upgrade procedure for heat includes a step where you are supposed to create a new rabbit vhost. I don't want that. Therefore, this is the cold upgrade steps.

...

1. Stop all magnum-services by adding the following keys to node-specific hiera, and then make sure to run puppet on the magnum hosts:

   1. magnum::conductor::enabled: false

   2. apache::service_ensure: 'stopped'

2. Run puppet with the zed modules/tags

3. Run apt dist-upgrade && apt autoremove

4. Run su -s /bin/sh -c "magnum-db-manage upgrade" magnum

5. Re-start magnum services by removing the keys added in step 1 and re-run puppet.

6. Check if a new Fedora CoreOS image is required, and if new public cluster templates should be deployed. I.e to support a newer k8s version
   1. The official documentation provides a nice bit of help with this.

Horizon

Reinstall the horizon servers to Ubuntu 22.04 if not already done

1. Run puppet with the zed modules/tags
2. run apt dist-upgrade && apt autoremove

3. Yes this is weird: Login to all memcached servers, and run systemctl restart memcached
4. Run puppet again
5. restart apache2