# Pastebin o9pVN3J1
(ironic-21.0.0.0rc3.dev24) root@ctl1:/openstack/venvs/ironic-21.0.0.0rc3.dev24# cat constraints.txt 
git+https://opendev.org/openstack/ironic@b26838b2913bbc739e88555c2441d1bc7fcd8429#egg=ironic
--constraint https://releases.openstack.org/constraints/upper/e770c44a9f83ff4a1d06366cb563c5907a8b21a0