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- this change adds rsyslog (https://github.com/rsyslog/rsyslog) as a new service that runs on every AWX node (managed by supervisord) in particular, this feature requires a recent version (v8.38+) of rsyslog that supports the omhttp module (https://github.com/rsyslog/rsyslog-doc/pull/750) - the "external_logger" handler in AWX is now a SysLogHandler that ships logs to the local UDP port where rsyslog is configured to listen (by default, 51414) - every time a LOG_AGGREGATOR_* setting is changed, every AWX node reconfigures and restarts its local instance of rsyslog so that its fowarding settings match what has been configured in AWX - unlike the prior implementation, if the external logging aggregator (splunk/logstash) goes temporarily offline, rsyslog will retain the messages and ship them when the log aggregator is back online - 4xx or 5xx level errors are recorded at /var/log/tower/external.err