Hi, guys The approved spec show-server-group had 2 options for response. 1. First one(current spec): "server": { "server_groups": [ # not cached "0b5d2c72-12cc-4ba6-a8d7-3ff5cc1d8cb8" ] } } related discuss: https://review.openstack.org/#/c/612255/11/specs/stein/approved/show-server-... digest: This decouple the current implementation of server groups then get a generic API. 2 Second one: "server": { "server_group": { "name": "groupA", "id": "0b5d2c72-12cc-4ba6-a8d7-3ff5cc1d8cb8" } related discuss: https://review.openstack.org/#/c/612255/4/specs/stein/approved/list-server-g... digest: people have tried to change the api to allow adding/removing servers to/from groups, but still not implement yet. we need align this for continuing this work. thanks. Reference: bp: https://blueprints.launchpad.net/nova/+spec/show-server-group spec: https://review.openstack.org/#/c/612255/13/specs/stein/approved/show-server-... code: https://review.openstack.org/#/c/621474/23 Regards Yongli He