OPNMGR alerting: health verdicts, incidents and notifications
A deeper look at how OPNMGR (OPNManager) turns agent telemetry into incidents and notifications: how health verdicts are reached (gateways, WireGuard up/idle/down, certificates that are actually in use, CARP), what the alert evaluator does every five minutes, alert policy and per-object muting, maintenance windows, notification pacing, and how to make sure email and Pushover notifications really arrive.
- Level
- Intermediate
- Length
- About 45 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 2 Oct 2026
- OPNMGR · open source
Skills you'll practise
- Interpret health verdicts for gateways, WireGuard peers, certificates and CARP, including what older agents can't report
- Explain what the alert evaluator does, how to check it with --dry-run and why the legacy offline job must be removed
- Choose between acknowledging, muting one object, muting a condition and a maintenance window for a noisy alert
- Check notification delivery using the notification history, the delivery-failure banner and the channel tests
- Recognise the alerting blind spots the docs describe and cover them from outside OPNMGR
Course outline
- 1.OPNMGR alerting in depthVideo · 2 min
- 2.From check-in to health verdictLesson · 15 min
- 3.How incidents are raised, paced and silencedLesson · 15 min
- 4.Making sure notifications arriveLesson · 15 min
- 5.OPNMGR alerting: health verdicts, incidents and notifications: knowledge checkKnowledge check · 17 questions
- 6.OPNMGR alerts went quietScenario
- 7.Final exam9 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- OPNMGR README: compatibility and feature availability, known limitations, upgrading
- OPNMGR CHANGELOG.md: release-by-release history (3.12.0 to 3.77.2)
- OPNMGR docs/UPGRADING.md: upgrading the server and the agent fleet
- OPNMGR docs/SCREENSHOTS.md: captioned tour of every page
- OPNMGR SECURITY.md: agent authentication, secrets at rest, remote commands, roles, sessions, audit log
- OPNsense documentation: WireGuard
- OPNsense documentation: Configure CARP (high availability, master and backup)
See it with your own jobs and topics
Tell us about your team and we'll walk you through setup, from choosing jobs to your first skills check.