Giulio pointed out (thanks) that it's because OSD has only ~500MB free space and it returns size in GBs so it rounds it to 0. We may need to increase extradisks size in tripleo-quickstart to make sure that default deployments pass (off-topic: sice increase may be necessary for Luminous anyway - https://review.openstack.org/#/c/505122/)
Giulio pointed out (thanks) that it's because OSD has only ~500MB free space and it returns size in GBs so it rounds it to 0. We may need to increase extradisks size in tripleo-quickstart to make sure that default deployments pass (off-topic: sice increase may be necessary for Luminous anyway - https:/ /review. openstack. org/#/c/ 505122/)