Guide: Using Prometheus metrics with Sensu Go

[apaskulin]

Create a new at /guides/prometheus-metrics that shows how to use Prometheus with Sensu

Notes:

• https://github.com/sensu/sensu-prometheus-collector
• instrument your app with a Prometheus library with as little as two lines of code (e.g. https://github.com/portertech/dummy/blob/master/main.go#L10 and https://github.com/portertech/dummy/blob/master/main.go#L40) OR use Prometheus node exporter
• collect the metrics using the Sensu Prometheus Collector (https://github.com/sensu/sensu-prometheus-collector; this is written in Go, but works with Sensu Classic and Sensu Go); this requires installation of one plugin and a single configuration file (on the Sensu backend)
• store the metrics in InfluxDB (recommended), using the built-in Sensu Enterprise (classic) InfluxDB handler, or the new Sensu Go InfluxDB handler (https://github.com/sensu/sensu-influxdb-handler); this requires a single configuration file (for built-in integration on classic; or to prompt Sensu Go to download and install it on Sensu Go)
• graph with Grafana (I'm literally showing the dashboard config in the screenshot; it's very simple)

Left todo on IaC for doc assistance:

• Sensu Go Influx DB handler configuration
• InfluxDB install and configuration
• Grafana install and configuration