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1. Set heat::api::enabled: false and heat::engine::enabled: false and heat::api_cfn: false in hiera to stop all services
2. Run puppet with rocky modules/tags
3. Run apt-dist-upgrade
4. Run heat-manage db_sync
5. In hiera, add heat::keystone::authtoken::www_authenticate_uri: "%{alias('ntnuopenstack::keystone::auth::uri')}" to ntnuopenstack.yaml in hiera
   1. And remove heat::keystone::authtoken::auth_uri: "%{alias('ntnuopenstack::keystone::auth::uri')}"
6. Remove the hiera keys that disabled the services and re-run puppet

Horizon

TBA

Compute nodes

When all APIs etc. are upgraded, it is time to do the same on the compute-nodes. Compute nodes are simple to upgrade:

1. Run puppet with the rocky modules/tags
2. Perform a dist-upgrade
3. Run puppet again
4. Restart openstack services