...

1. Add the following three lines to the node-file of the first node you would like to upgrade:
   

   1. apache::service_ensure: 'stopped'

   2. cinder::scheduler::enabled: false

   3. cinder::volume::enabled: false

2. Run puppet with the yoga modules/tags, run apt-get dist-upgrade, and run puppet again
3. Run cinder-manage db sync && cinder-manage db online_data_migrations
4. Remove the lines added at step 1, re-run puppet, and test that the upgraded cinder version works.
5. Perfom step 2 for the rest of the cinder nodes

Neutron

API-nodes

1. Pick the first node, and run puppet with the yoga modules/tags, Run apt-get autoremove && apt-get dist-upgrade
2. Run neutron-db-manage upgrade --expand
3. Restart neutron-server.service and rerun puppet
4. Upgrade the rest of the API-nodes (repeating step 1, and 3)
5. Stop all neutron-server processes for a moment, and run:
   
   1. neutron-db-manage upgrade --contract
6. Re-start the neutron-server processes

BGP-agents

Either you simply reinstall the node with yoga modules/tags; or you follow the following list:

1. Run puppet with the yoga modules/tags
2. Run apt dist-upgrade
3. Rerun puppet and restart the service
   1. systemctl restart neutron-bgp-dragent.service

   2. or simply reboot

Network-nodes

Either you simply reinstall the node with yoga modules/tags; or you follow the following list:

1. Run puppet with the yoga 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.