Hello together, Followed the nice guide here (upgrade from Mitaka to Newton): https://www.rdoproject.org/install/upgrading-rdo-1/ to upgrade a 4 node Mitaka QA environment deployed with packstack (1 controller, 3 compute) to *Ocata*. The good news is that all VMs are running on the compute nodes and horizon can be reached with the new nice OpenStack logo :-), but I can't login to horizon anymore. After the package upgarde and following the steps on the mentioned guide above, the call: # systemctl isolate openstack-services.snapshot didn't work as expected (it got stuck for a long time and I'd to reboot the controller). One issue which I'd to deal with was the dependency with some Ceph packages: Error: centos-release-ceph-jewel conflicts with centos-release-ceph-hammer-1.0-5.el7.centos.noarch (I'd to erase the Mitaka rpm and disable the Ceph repo and first after that the yum install -y centos-release-openstack-ocata worked) So, now after the upgrade if I call openstack-status, some services like nova-api are showing up in "activating" phase and keystone is disabled and there are some 500 internal server errors as provided below. To be honest, I'm not sure if the direct upgrade from Mitaka to Ocata is the right way and most probably it'd be better to upgarde first to Newton and then to Ocata, right?. On Mitaka Keystone v2 was activated and as I know in Newton Keystone v3 is the default version. Now my questions are: Does the guide above work for upgrading to Ocata at all, e.g. from Newton to Ocata? Are there any additional steps which one needs to consider? What happens if I create a new packstack answer-file and run a new deployment? (well, I know the answer might be, try it yourself :-)) Do I need to adjust the nova.conf, keystone.conf files? Thanks for any hints in advance! -Arash [root@controller~(keystone_admin)]# openstack-status == Nova services == openstack-nova-api: activating openstack-nova-compute: inactive (disabled on boot) openstack-nova-network: inactive (disabled on boot) openstack-nova-scheduler: activating openstack-nova-cert: activating openstack-nova-conductor: activating openstack-nova-console: inactive (disabled on boot) openstack-nova-consoleauth: activating openstack-nova-xvpvncproxy: inactive (disabled on boot) == Glance services == openstack-glance-api: active openstack-glance-registry: active == Keystone service == openstack-keystone: inactive (disabled on boot) == Horizon service == openstack-dashboard: 301 == neutron services == neutron-server: active neutron-dhcp-agent: active neutron-l3-agent: active neutron-metadata-agent: active neutron-openvswitch-agent: active neutron-metering-agent: active == Cinder services == openstack-cinder-api: active openstack-cinder-scheduler: inactive openstack-cinder-volume: active openstack-cinder-backup: active == Ceilometer services == openstack-ceilometer-api: inactive (disabled on boot) openstack-ceilometer-central: active openstack-ceilometer-compute: inactive (disabled on boot) openstack-ceilometer-collector: active openstack-ceilometer-notification: active == Heat services == openstack-heat-api: active openstack-heat-api-cfn: inactive (disabled on boot) openstack-heat-api-cloudwatch: inactive (disabled on boot) openstack-heat-engine: inactive == Support services == mariadb: active openvswitch: active dbus: active target: active rabbitmq-server: active memcached: active == Keystone users == Traceback (most recent call last): File "/usr/bin/keystone", line 6, in <module> from keystoneclient.shell import main File "/usr/lib/python2.7/site-packages/keystoneclient/shell.py", line 32, in <module> from keystoneclient.contrib.bootstrap import shell as shell_bootstrap File "/usr/lib/python2.7/site-packages/keystoneclient/contrib/bootstrap/shell.py", line 17, in <module> @utils.arg('--user-name', metavar='<user-name>', default='admin', dest='user', AttributeError: 'module' object has no attribute 'arg' == Glance images == Internal Server Error (HTTP 500) == Nova managed services == No handlers could be found for logger "keystoneauth.identity.generic.base" ERROR (InternalServerError): Internal Server Error (HTTP 500) == Nova networks == No handlers could be found for logger "keystoneauth.identity.generic.base" ERROR (InternalServerError): Internal Server Error (HTTP 500) == Nova instance flavors == No handlers could be found for logger "keystoneauth.identity.generic.base" ERROR (InternalServerError): Internal Server Error (HTTP 500) == Nova instances == No handlers could be found for logger "keystoneauth.identity.generic.base" ERROR (InternalServerError): Internal Server Error (HTTP 500)