- Alertmanager Configuration (/etc/alertmanager/alertmanager.yml)
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- Prometheus Configuration (/etc/prometheus/promethes.yml)
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- Concepts:
- Grouping: Groups similar alerts into 1 notification
- Inhibition: Silence other alerts if one specified alert is already fired
- Silences: A simple way to mute certain notifications
- High availability
- You can create a high available Alertmanager cluster using mesh config
- Do not load balance this service!
- Use a list of Alertmanager nodes in Prometheus config
- All alerts are sent to all known Alertmanager nodes
- No need to monitor the monitoring
- Guarantees the notification is at least send once
- Alert states:
- Inactive - No rule is met
- Pending - Rule is met but can be suppressed due to validations
- Firing - Alert is sent to the configured channel (mail, Slack, ...)
- Runs on port :9093
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- Notifying multiple destinations
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