In a rocky deployment aodh is failing to raise alarms due to what seems like a locale issue. If I purge packages:

apt-get purge aodh-api aodh-evaluator aodh-expirer aodh-notifier aodh-listener python3-aodh libapache2-mod-wsgi-py3 python-apt python-aodh python-memcache

Then disable the AodhCharmRocky class and rerun install so that it pulls in the py2 packages then things start working.

The error from /var/log/aodh/aodh-listener.log:

http://paste.ubuntu.com/p/FCft2GGnfN/

ERROR oslo_db.sqlalchemy.exc_filters [-] DB exception wrapped.: AttributeError: 'list' object has no attribute 'lower'
ERROR oslo_db.sqlalchemy.exc_filters Traceback (most recent call last):
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
ERROR oslo_db.sqlalchemy.exc_filters     context)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/default.py", line 508, in do_execute
ERROR oslo_db.sqlalchemy.exc_filters     cursor.execute(statement, parameters)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 163, in execute
ERROR oslo_db.sqlalchemy.exc_filters     query = self.mogrify(query, args)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 142, in mogrify
ERROR oslo_db.sqlalchemy.exc_filters     query = query % self._escape_args(args, conn)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 122, in _escape_args
ERROR oslo_db.sqlalchemy.exc_filters     return dict((key, conn.literal(val)) for (key, val) in args.items())
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 122, in <genexpr>
ERROR oslo_db.sqlalchemy.exc_filters     return dict((key, conn.literal(val)) for (key, val) in args.items())
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 819, in literal
ERROR oslo_db.sqlalchemy.exc_filters     return self.escape(obj, self.encoders)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 806, in escape
ERROR oslo_db.sqlalchemy.exc_filters     return "'" + self.escape_string(obj) + "'"
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 825, in escape_string
ERROR oslo_db.sqlalchemy.exc_filters     return converters.escape_string(s)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/converters.py", line 73, in _escape_unicode
ERROR oslo_db.sqlalchemy.exc_filters     return value.translate(_escape_table)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/oslo_i18n/_message.py", line 85, in translate
ERROR oslo_db.sqlalchemy.exc_filters     self.has_plural_form)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/oslo_i18n/_message.py", line 117, in _translate_msgid
ERROR oslo_db.sqlalchemy.exc_filters     fallback=True)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3.6/gettext.py", line 525, in translation
ERROR oslo_db.sqlalchemy.exc_filters     mofiles = find(domain, localedir, languages, all=True)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3.6/gettext.py", line 482, in find
ERROR oslo_db.sqlalchemy.exc_filters     for nelang in _expand_lang(lang):
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3.6/gettext.py", line 206, in _expand_lang
ERROR oslo_db.sqlalchemy.exc_filters     loc = locale.normalize(loc)
ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3.6/locale.py", line 397, in normalize
ERROR oslo_db.sqlalchemy.exc_filters     code = localename.lower()
ERROR oslo_db.sqlalchemy.exc_filters AttributeError: 'list' object has no attribute 'lower'
ERROR oslo_db.sqlalchemy.exc_filters 
ERROR aodh.evaluator [-] alarm state update failed: oslo_db.exception.DBError: 'list' object has no attribute 'lower'
ERROR aodh.evaluator Traceback (most recent call last):
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
ERROR aodh.evaluator     context)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/default.py", line 508, in do_execute
ERROR aodh.evaluator     cursor.execute(statement, parameters)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 163, in execute
ERROR aodh.evaluator     query = self.mogrify(query, args)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 142, in mogrify
ERROR aodh.evaluator     query = query % self._escape_args(args, conn)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 122, in _escape_args
ERROR aodh.evaluator     return dict((key, conn.literal(val)) for (key, val) in args.items())
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 122, in <genexpr>
ERROR aodh.evaluator     return dict((key, conn.literal(val)) for (key, val) in args.items())
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 819, in literal
ERROR aodh.evaluator     return self.escape(obj, self.encoders)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 806, in escape
ERROR aodh.evaluator     return "'" + self.escape_string(obj) + "'"
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 825, in escape_string
ERROR aodh.evaluator     return converters.escape_string(s)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/converters.py", line 73, in _escape_unicode
ERROR aodh.evaluator     return value.translate(_escape_table)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/oslo_i18n/_message.py", line 85, in translate
ERROR aodh.evaluator     self.has_plural_form)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/oslo_i18n/_message.py", line 117, in _translate_msgid
ERROR aodh.evaluator     fallback=True)
ERROR aodh.evaluator   File "/usr/lib/python3.6/gettext.py", line 525, in translation
ERROR aodh.evaluator     mofiles = find(domain, localedir, languages, all=True)
ERROR aodh.evaluator   File "/usr/lib/python3.6/gettext.py", line 482, in find
ERROR aodh.evaluator     for nelang in _expand_lang(lang):
ERROR aodh.evaluator   File "/usr/lib/python3.6/gettext.py", line 206, in _expand_lang
ERROR aodh.evaluator     loc = locale.normalize(loc)
ERROR aodh.evaluator   File "/usr/lib/python3.6/locale.py", line 397, in normalize
ERROR aodh.evaluator     code = localename.lower()
ERROR aodh.evaluator AttributeError: 'list' object has no attribute 'lower'
ERROR aodh.evaluator 
ERROR aodh.evaluator The above exception was the direct cause of the following exception:
ERROR aodh.evaluator 
ERROR aodh.evaluator Traceback (most recent call last):
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/aodh/evaluator/__init__.py", line 128, in _refresh
ERROR aodh.evaluator     self._storage_conn.update_alarm(alarm)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/aodh/storage/impl_sqlalchemy.py", line 273, in update_alarm
ERROR aodh.evaluator     alarm.as_dict())
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/orm/query.py", line 3426, in update
ERROR aodh.evaluator     update_op.exec_()
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/orm/persistence.py", line 1326, in exec_
ERROR aodh.evaluator     self._do_exec()
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/orm/persistence.py", line 1493, in _do_exec
ERROR aodh.evaluator     self._execute_stmt(update_stmt)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/orm/persistence.py", line 1333, in _execute_stmt
ERROR aodh.evaluator     mapper=self.mapper)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/orm/session.py", line 1176, in execute
ERROR aodh.evaluator     bind, close_with_result=True).execute(clause, params or {})
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 948, in execute
ERROR aodh.evaluator     return meth(self, multiparams, params)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/sql/elements.py", line 269, in _execute_on_connection
ERROR aodh.evaluator     return connection._execute_clauseelement(self, multiparams, params)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 1060, in _execute_clauseelement
ERROR aodh.evaluator     compiled_sql, distilled_params
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 1200, in _execute_context
ERROR aodh.evaluator     context)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 1409, in _handle_dbapi_exception
ERROR aodh.evaluator     util.raise_from_cause(newraise, exc_info)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/util/compat.py", line 203, in raise_from_cause
ERROR aodh.evaluator     reraise(type(exception), exception, tb=exc_tb, cause=cause)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/util/compat.py", line 186, in reraise
ERROR aodh.evaluator     raise value.with_traceback(tb)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
ERROR aodh.evaluator     context)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/default.py", line 508, in do_execute
ERROR aodh.evaluator     cursor.execute(statement, parameters)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 163, in execute
ERROR aodh.evaluator     query = self.mogrify(query, args)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 142, in mogrify
ERROR aodh.evaluator     query = query % self._escape_args(args, conn)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 122, in _escape_args
ERROR aodh.evaluator     return dict((key, conn.literal(val)) for (key, val) in args.items())
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 122, in <genexpr>
ERROR aodh.evaluator     return dict((key, conn.literal(val)) for (key, val) in args.items())
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 819, in literal
ERROR aodh.evaluator     return self.escape(obj, self.encoders)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 806, in escape
ERROR aodh.evaluator     return "'" + self.escape_string(obj) + "'"
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 825, in escape_string
ERROR aodh.evaluator     return converters.escape_string(s)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/pymysql/converters.py", line 73, in _escape_unicode
ERROR aodh.evaluator     return value.translate(_escape_table)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/oslo_i18n/_message.py", line 85, in translate
ERROR aodh.evaluator     self.has_plural_form)
ERROR aodh.evaluator   File "/usr/lib/python3/dist-packages/oslo_i18n/_message.py", line 117, in _translate_msgid
ERROR aodh.evaluator     fallback=True)
ERROR aodh.evaluator   File "/usr/lib/python3.6/gettext.py", line 525, in translation
ERROR aodh.evaluator     mofiles = find(domain, localedir, languages, all=True)
ERROR aodh.evaluator   File "/usr/lib/python3.6/gettext.py", line 482, in find
ERROR aodh.evaluator     for nelang in _expand_lang(lang):
ERROR aodh.evaluator   File "/usr/lib/python3.6/gettext.py", line 206, in _expand_lang
ERROR aodh.evaluator     loc = locale.normalize(loc)
ERROR aodh.evaluator   File "/usr/lib/python3.6/locale.py", line 397, in normalize
ERROR aodh.evaluator     code = localename.lower()
ERROR aodh.evaluator oslo_db.exception.DBError: 'list' object has no attribute 'lower'
ERROR aodh.evaluator