Prometheus

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

Overview

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

Syntax

prometheus promql

prometheus metric syntax

Integrations

Dashboards

grafana

metric/graph dashboards