Host was racked in T313867 and needs to be put in production.
**Prerequisites:**
* [x] Apply the role::netmon to the netmon2002 host [[ https://gerrit.wikimedia.org/r/c/operations/puppet/+/854624 | #854624 ]].
* [] Set netmon2002 as a backup/standby netmon host [[ https://gerrit.wikimedia.org/r/c/operations/puppet/+/854625 | #854625 ]]
* [] Lower LibreNMS and Netbox TTL in preparation for the new instance.[1]
* [] Confirm the netmon2002 host has DB privileges
* [] Open firewall port for the LibreNMS database [[ https://gerrit.wikimedia.org/r/c/operations/puppet/+/854951 | #854951 ]]
* [] Connect to the LibreNMS database
* [] Determine what (if any) data should to be carried over from netmon2001 to netmon2002
1. Also relevant for [[ https://phabricator.wikimedia.org/T322695 | T322695 ]].
**Failover:**
* [] Failover to netmon2002
* [] Sync RRDs in /srv/librenms/rrd/
* [] Sync rancid in /var/lib/rancid/core and /var/lib/rancid/GIT
* [] Add the netmon2002 host to the alertmanager API rw [[ https://gerrit.wikimedia.org/r/854974 | #854974 ]]
**Post-failover validations:**
* [] Ensure metrics in the various tabs of https://librenms.wikimedia.org/poller are similar before and after the failover
* [] Ensure no device took too long to poll an alert
* [] Ensure graphs look healthy
* [] Ensure there are no active Icinga alerts for the netmon2002 host
* [] Ensure there are no red flags in the logs - https://wikitech.wikimedia.org/wiki/LibreNMS#Check_the_logs
* [] Ensure the new rancid directory works - https://wikitech.wikimedia.org/wiki/RANCID
* [] Update all docs with mentions of netmon2001 (and maybe a link to this task in on the LibreNMS wikitech page).