+++ This bug was initially created as a clone of Bug #1927814 +++ In order to support TLS for caching with Memcached, python-dogpile-cache needs to be bumped to version 1.1.2 and python-pymemcache to version 3.4.0.
python-pymemcache-3.4.0 has been built in CBS for Centos 8 https://cbs.centos.org/koji/buildinfo?buildID=31981 and will be updated in RDO for Wallaby (it's still WIP). python-pymemcache does not exist in OSP16.2 currently so this is net new addition, so backwards compatible change.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Red Hat OpenStack Platform (RHOSP) 16.2 enhancement advisory), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2021:3483