--- deprecations: - OSprofiler support requires passing of trace information between various OpenStack services. This information is signed by one of HMAC keys, which we historically defined in glance-api-paste.ini and glance-registry-paste.ini files (together with enabled option, that in fact was duplicated in the corresponding configuration files). OSprofiler 0.3.1 and higher supports passing this information via configuration files, therefore it's recommended to modify the ``[filter:osprofiler]`` section in \*-paste.ini to look like ``paste.filter_factor = osprofiler.web:WsgiMiddleware.factory`` and set the ``hmac_keys`` option in the glance-\*.conf files.