A bit of background: - In order to make keystone py3 compatible, we have to make our LDAP code compatible - We use two libraries for our LDAP code: python-ldap and ldappool, both are not actively maintained - python-ldap has a py3 port called pyldap. Great! - ldappool does not have a py3 port. With all that said, ldappool is only a few hundred lines of code. Can we pull it in-tree? It looks like ldappool is MPL licensed: Version: MPL 1.1/GPL 2.0/LGPL 2.1 Exact license for ldappool is here: https://github.com/mozilla-services/ldappool/blob/master/ldappool/__init__.p... We have a patch that pulls it in tree up for review (with a few changes to make it py3 friendly): https://review.openstack.org/#/c/311827/3/keystone/common/ldap/ldappool.py stevemar