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What Are Labels in Prometheus Alerts?
- Labels in Prometheus alerting rules are key-value pairs that provide additional information to alerts, helping categorize, route, and filter them.
- Labels can be used to categorize alerts based on severity, route alerts to specific teams or channels, and group alerts in tools like Alertmanager, Grafana, or Slack.
- Alert rules in Prometheus include labels like severity: critical to indicate the importance level of an alert.
- Multiple labels can be added to an alert rule to make it more descriptive and informative, such as team and region information.
- Labels assist in alert routing by specifying where to send alerts (email, Slack, PagerDuty, etc.), whether to silence or group alerts, and which team should respond.
- Examples of label-based alert routing include sending critical alerts belonging to the infra team to the slack-infra channel.
- In Prometheus alerting rules, labels are crucial for indicating the severity, team responsible, and environment context of alerts.
- By using labels effectively, users can manage alert notifications, routing, and responses more efficiently within Prometheus.
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