Metrics

For ingesting, storing and alerting on our metrics, we shall explore another, quite popular open-source project called Prometheus:

	Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Prometheus's main features are: -a multi-dimensional data model (time series identified by metric name and key/value pairs) - a flexible query language to leverage this dimensionality - no reliance on distributed storage; single server nodes are autonomous - time series collection happens via a pull model over HTTP - pushing time series is supported via an intermediary gateway - targets are discovered via service discovery or static configuration - multiple modes of graphing and dashboarding support
	--https://prometheus.io/docs/introduction/overview/emphasis>

Even though it is the kind of system that takes care of pretty much everything, the project still follows the popular UNIX philosophy of modular development. Prometheus is composed...