Prometheus: alert:

• https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/

alert: InstanceDown
expr: up == 0
for: 5m
labels:
  severity: page
annotations:
  summary: "Instance Template:$labels.instance down"
  description: "Template:$labels.instance of job Template:$labels.job has been down for more than 5 minutes."

Related

• Alertmanager

See also

• Prometheus: Prometheus installation, 9090, storage, Prometheus exporters: Node exporter 9100, Blackbox exporter, Prometheus alertmanager (changelog), Prometheus versions, Prometheus Node exporter releases, promtool, amtool, tsdb, /etc/default/prometheus, /etc/prometheus/prometheus.yml, journalctl -u prometheus, /etc/default/prometheus-node-exporter, PromQL, alert:, Prometheus Operator, Thanos, VictoriaMetrics, PushGateway, Prometheus API, values.yml, Amazon Managed Service for Prometheus