service would often hang

roles/glance/templates/glance.service

@@ -6,8 +6,7 @@ Requires=docker.service
 [Service]
 TimeoutStartSec=0
 Restart=always
-ExecStartPre=-/usr/bin/docker stop %n
-ExecStartPre=-/usr/bin/docker rm %n
+ExecStartPre=-/usr/bin/docker rm -f %n
 ExecStart=/usr/bin/docker run --name %n \
   -e "RABBIT_HOST={{ hostvars[groups['rabbitmq'][0]]['ansible_default_ipv4']['address'] }}" \
   -e "MEMCACHED_HOST={{ hostvars[groups['memcached'][0]]['ansible_default_ipv4']['address'] }}" \