The SOP for FMN is missing from the infra documentation. This needs to be written.
A handy command when investigating FMN on notifs-backend01:
{{{ sudo -u nrpe watch "/usr/lib64/nagios/plugins/check_fedmsg_consumer_backlog.py fedmsg-hub FMNConsumer 80000 100000; echo '-------------'; tail -40 /var/log/fedmsg/fedmsg-hub.log" }}}
Looks like this was originally written in this commit over a year ago:
https://infrastructure.fedoraproject.org/cgit/infra-docs.git/commit/?id=09d33f7f2e4300a743fd409315c99be3a58c56b8
And it has since been updated a few times and it now lives here:
https://infrastructure.fedoraproject.org/infra/docs/fmn.rst
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