In this chapter, we dived into the alerting component of the Prometheus stack, Alertmanager. This service was designed with availability in mind, and we had the opportunity to understand how it works, from generating better notifications to avoiding being flooded by useless ones. The notification pipeline is a very good starting point to grok the inner workings of Alertmanager, but we also went through its configuration, while providing examples to better solidify that knowledge. We were introduced to amtool and all the features it provides, such as adding, removing, and updating silences directly from the command line.
Alertmanager has several notification integrations available and we went through all of them, so you can pick and choose the ones you're interested in. Since we all want better notifications, we delved into how to customize the default notifications...