When a Prometheus alerting rule fires, the Prometheus server sends a notification to the Alertmanager, which is then responsible for processing that alert further, i.e. by routing it to an appropriate alerting channel (e-mail, Slack, …). In order to test the Alertmanager configuration, it is useful to trigger alerts directly via Alertmanager’s API. That API is not documented on the Prometheus website, but it’s easy enough to figure out how it works.
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This is a technology blog by Matthias Friedrich, a software developer and architect from Karlsruhe, Germany. more ...-
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