Alertmanager is the component from the Prometheus ecosystem that's responsible for the notifications that are triggered by the alerts that are generated from the Prometheus server. As such, its availability is of the essence and the design choices reflect this need. It's the only component that's truly conceived to work in a highly available cluster setup, and uses gossip as the communication protocol:
At a very high level, Alertmanager is a service that receives HTTP POST requests from Prometheus servers via its API, which it then deduplicates and acts on by following a predefined set of routes.
Alertmanager also exposes a web interface to allow, for instance, the visualization and silencing of firing alerts or applying inhibition rules for them.
One of the core design...
