There was a script called big hammer which would remove everything. As RDO evolved, the script did not, as I found when removing my Liberty install and moving to Mitaka. In particular, there are many new packages which were not removed. Since packstack does installs, not upgrades, I was left with a hodgepodge of old and new components. After running yum upgrade, I could find which components should have been removed to allow a semi-clean install. Here is the original big hammer script: https://gist.github.com/jimleitch01/9379158563baf3649cb7 Additional packages which needed to be removed, probably missed a few: wxBase python2-pika_pool python2-suds python2-requestsexceptions python2-fasteners python2-pyasn1 python2-appdirs python2-PyMySQL python2-mock python2-google-api-client python2-positional python2-funcsigs python2-eventlet python2-pika python2-rsa python2-gflags python2-wsme python2-oauth2client python2-uri-templates python2-iso8601 python2-pyasn1-modules python2-zake python-sqlparse python-greenlet python2-greenlet python-passlib python2-passlib python2-pecan python-pecan python2-singledispatch python-singledispatch facter liberasurecode mariadb-libs pyOpenSSL python-XStatic-Angular-lrdragndrop python-XStatic-Magic-Search python-XStatic-smart-table python-XStatic-termjs python-bson python-cmd2 python-django python-django-bash-completion python-django-compressor python-django-horizon python-django-pyscss python-dogpile-cache python-fixtures python-kazoo python-keyring python-netaddr python-networkx-core python-nose python-oauthlib python-osprofiler python-paste-deploy python-pyeclib python-pygments python-pymongo python-scss python-simplejson python-sphinx python-testtools python-webob python-wrapt redis mariadb-config python-linecache2 python-pathlib python-traceback2 python-unittest2 python2-cryptography python2-pyasn1 Some extra directories (probably not all) include: /etc/ceilometer /etc/neutron /etc/openstack-dashboard /etc/pki/galera /etc/my.cnf.d On top of that, openvswitch remains, removing it without removing the network configuration which uses it results in a system with no network access. One other suggestion is to not install docker components, as there is a conflict with the looparounds used by packstack and those used by docker. Regards, John Haller