Comment 0 for bug 1437816

AVAILABLE_WHEN_DONOR should be 1 as Fuel configures a non-blocking xtrabackup replication.
https://github.com/stackforge/fuel-library/blob/master/deployment/puppet/openstack/templates/galera_clustercheck.erb#L22

That would improve the UX with the full cluster reassemble replication time - the donor node will be ready for service ASAP