Prometheus

A system monitoring tool.
Metrics are polled/persisted over REST,

Documentation

home	https://prometheus.io/

Tutorials

overview

https://sbcode.net/prometheus/

Routes

9090	default web-ui
http://${IP_ADDR}:9090	web-ui
http://${IP_ADDR}:9090/targets	web-gui (health of queried metrics)

Locations

${PREFIX}/etc/prometheus.yml	main configuration
/var/db/prometheus	data dir

Quickstart

• prometheus polls HTTP endpoints for collected metrics
• these endpoints are called exporters, and they are generated/exposed using clients
• you can configure rules to persist data, or emit alerts when a metric fails

xdg-open localhost:9090                          # prometheus-ui
promtool check rules /path/to/example.rules.yml  # validate rule
amtool check-config alertmanager.yml              # validate alertmanager config

Notes

Setup

prometheus install

prometheus exporters

prometheus alerters

Configuration

prometheus configuration

prometheus rules

Usage

prometheus web ui

prometheus http api

prometheus promql

Integrations

Dashboards

grafana

metric/graph dashboards