ceph-ansible/tests/functional/centos/7/cluster/ceph-override.json

{
	"ceph_conf_overrides": {
		"global": {
			"osd_pool_default_pg_num": 12,
			"osd_pool_default_size": 1
		}
	},
  "ceph_docker_image_tag": "latest-bis",
  "ceph_mon_docker_memory_limit": "2g"
}