When Instance HA is enabled, upgrade or scale-up operations are not possible. Any attempts to do this will fail. This limitation applies to minor and major upgrades. Before upgrading or scaling your overcloud, you must disable Instance HA first.

To disable Instance HA, run the following command as the stack user on the undercloud:

stack@director $ ansible-playbook /home/stack/tripleo-ha-utils/playbooks/overcloud-instance-ha.yml \
-e release="rhos-12" -e instance_ha_action="uninstall"

If you used the stonith_devices option when you enabled Instance HA, you need to specify this option when you disable Instance HA. For example, if your Instance HA configuration excludes STONITH devices, use the following command syntax:

stack@director $ ansible-playbook /home/stack/tripleo-ha-utils/playbooks/overcloud-instance-ha.yml \
-e release="rhos-12" -e instance_ha_action="uninstall" -e stonith_devices="none"