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1. Select which glance-server to upgrade first.
   1. In the node-specific hiera for this host you should set: 
      1. glance::api::enabled: false
      2. apache::service_ensure: 'stopped'
2. Run puppet with the zed modules/tags, run apt-get dist-upgrade, and run puppet again
3. Run glance-manage db expand
4. Run glance-manage db migrate
5. Remove the glance::api::enable: false and apache::service_ensure: 'stopped' from the node-specific hiera, and run puppet again. This would re-start the glance api-server on this host.
   1. Test that this api-server works.
6. Upgrade the rest of the glance hosts (ie; step 2 for each of the remaining glance hosts)Run glance-manage db contract on one of the glance-nodes.