Following on from the last email about br-ex causing everything to baulk, I manually created the br-ex using brctl addbr br-ex and got past that hurdle. But now falling over with another one ERROR oslo_db.sqlalchemy.exc_filters InternalError: (1071, u'Specified key was too long; max key length is 767 bytes') ERROR oslo_db.sqlalchemy.exc_filters Error during database migration: (pymysql.err.InternalError) (1071, u'Specified key was too long; max key length is 767 bytes') [SQL: u'\nALTER TABLE quota_usages CHANGE COLUMN resource resource VARCHAR(300)'] (Background on this error at: http://sqlalche.me/e/2j85) Base OS is CentOS 7.5. I've found this which looks similar - https://review.openstack.org/#/c/626146/ - but I've no idea how to apply it to my Devstack installation. I'd appreciate some assistance please. David