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

{
	"ceph_conf_overrides": {
		"global": {
			"osd_pool_default_pg_num": 12
		}
	},
	"cephfs_pools": [
		{
		  "name": "cephfs_metadata",
		  "pgs": 8,
		  "size": 1
		},
		{
		  "name": "cephfs_data",
		  "pgs": 8,
		  "size": 1
		}
	],
  "ceph_mon_docker_memory_limit": "2g"
}