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Alertmanager

Alertmanager is a Prometheus component that groups, routes, silences, suppresses, and delivers alerts to notification channels.

How 3 Manning books explain it

Machine Learning Platform Engineering

Alertmanager is the Prometheus component that groups, routes, and delivers alerts to notification channels.

How it is used
Routes Prometheus alerts to responsible people or systems so operations teams can respond before failures cause major user impact.
How deep it goes
Explains alert expressions, pending duration, labels, annotations, grouping, intervals, and email routing, but does not detail Alertmanager internals.
Examples
Uses BentoML service health, up and absent expressions, Prometheus rules, Gmail routing, and alert-state views.
What you can do after
Operate/configure Alertmanager to group, route, repeat, and resolve Prometheus notifications through an email receiver.

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Cloud Observability in Action

Alertmanager is a Prometheus component that groups, routes, silences, and suppresses alerts.

How it is used
Handles grouping, routing, suppression, deduplication, and notification after Prometheus evaluates alerting rules.
How deep it goes
Explains the Prometheus handoff and demonstrates routing configuration, but does not detail Alertmanager internals.
Examples
Uses a critical API-call alert, environment-based grouping, webhook delivery, Docker Compose, and operator notifications.
What you can do after
Operate/configure Alertmanager to route concise Prometheus notifications and reduce alert fatigue.

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ScyllaDB in Action

Alertmanager is an open-source service in the Prometheus ecosystem that groups, routes, and delivers alert notifications.

How it is used
Routes Prometheus alerts to notification providers instead of requiring engineers to watch monitoring graphs continuously.
How deep it goes
Explains alert evaluation, labels, annotations, UI behavior, routing, and a dead-node rule, with deployment context but no detailed routing configuration.
Examples
Uses the InstanceDown rule, the tooManyFiles alert, Alertmanager’s UI, and Docker containers named aalert, agraf, and aprom.
What you can do after
Operate/configure it by deploying the stack, inspecting firing alerts, and routing notifications using labels and annotations.

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Related concepts

These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.