Comment 7 for bug 1892210

Reviewed: https://review.opendev.org/747660
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=7b512d633d59d8d35db785bfa3d7e61dd202d399
Submitter: Zuul
Branch: stable/stein

commit 7b512d633d59d8d35db785bfa3d7e61dd202d399
Author: Pierre Riteau <email address hidden>
Date: Wed Aug 19 17:56:30 2020 +0200

    Add workaround for keystonemiddleware/neutron memcached issue

    There is an issue where keystonemiddleware connections to memcached from
    neutron-server grow beyond configured values [1], eventually reaching
    the maximum number of connections accepted by memcached servers. Other
    services do not appear to be affected by this issue.

    A workaround is to use the advanced memcached pool. Despite its
    documentation claiming to only work with Python 2, it appears to work
    fine on Python 3.

    [1] https://bugs.launchpad.net/keystonemiddleware/+bug/1883659

    Change-Id: Ifbbc2022839cbc575848d830600241c61603c80b
    Closes-Bug: #1892210
    (cherry picked from commit 5a52d8e4a0c5d4c246deb8851ef893df63ee0847)