mysqld_exporter
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How do I send alert notifications when exporter goes down by itself?
The exporter in operation is down or down, how can it notify the exporter that the service is down? For example: "When I kill the exporter, how does it tell me that the exporter is down or abnormal?".
Not sure what you do, but when a Prometheus scrap target doesn't respond, we get an InstanceDown
alert. :)
Maybe this blog post can help you to define the right alert for that use case https://www.robustperception.io/absent-alerting-for-scraped-metrics