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1. Add the following to the node-specific hiera-file for neutronapi-hosts:
   1. apache::mod::wsgi::package_name: 'libapache2-mod-wsgi-py3'
   2. apache::mod::wsgi::mod_path: '/usr/lib/apache2/modules/mod_wsgi.so'
2. Pick the first node, and add the following to the nodes hiera-file:
   1. apache::service_ensure: 'stopped'
   2. neutron::server::enabled: false
3. Pick the first node, and run Run puppet with the zed modules/tags, Run apt-get autoremove && apt-get dist-upgrade
4. Run neutron-db-manage upgrade --expand
5. Remove the sines stopping neutron-server.service and apache2 int the hiera node-file, and re-run puppet
6. Upgrade the rest of the API-nodes (repeating step 1, and 33 and then reboot.)
7. Stop all neutron-server and apache processes for a moment, and run:
   
   1. neutron-db-manage upgrade --contract
8. Re-start the neutron-server and apache processes

BGP-agents

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

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