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Alerting Rules for Node Exporter and Prometheus Down

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Alerting Rules for Node Exporter and Prometheus Down Alerting Rules for Node Exporter and Prometheus Down

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Description

We will create alerting rules from when Prometheus detects a Node exporter is not up.

And we will create an alerting rule for when Prometheus is down.

When a node exporter is down, then Prometheus will return a 0 for the up metric. This is easy to write an alerting rule for.

But when Prometheus is down, then Grafana will get a timeout. There will be no response from Prometheus at all.

We will need to handle the symptom, rather than the metric value, as is returned when a Node exporter is down.