We have message in console: * "Uncommited messages deleted from journal"*
> Uncommited messages deleted from journal
> Some messages were deleted from the Graylog journal before they could be
> written to Elasticsearch. Please verify that your Elasticsearch cluster is
> healthy and fast enough.
Nagios Graylog2 checks via REST API the availability of the service.
https://github.com/catinello/nagios-check-graylog2
Is the service processing data? How long does the check take? We monitor
performance through the number of data sources, total of processed
messages, index failures and
