* :ref:`pre-upgrade_node-health`: Node health check
* :ref:`pre-upgrade_openstack-endpoints`: Check connectivity to various OpenStack services
* :ref:`pre-upgrade_repos`: Check correctness of current repositories
* :ref:`pre-upgrade_stack-health`: Stack Health Check
* :ref:`pre-upgrade_undercloud-disk-space-pre-upgrade`: Verify undercloud fits the disk space requirements to perform an upgrade
* :ref:`pre-upgrade_undercloud-ram`: Verify the undercloud fits the RAM requirements
* :ref:`pre-upgrade_undercloud-service-status`: Verify undercloud services state before running update or upgrade