April 2023
Intermediate to advanced
415 pages
9h 55m
English
Content preview from Prometheus: Up & Running, 2nd Edition
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Chapter 8. Service Discovery
Thus far you’ve had Prometheus find what to scrape using static configuration via
static_configs. This is fine for simple use cases,1 but having to manually keep your
prometheus.yml up to date as machines are added and removed would get
annoying, particularly if you were in a dynamic environment where new instances
might be brought up every minute. This chapter will show you how you can let
Prometheus know what to scrape.
You already know where all of your machines and services are, and how they are laid out. Service discovery (SD) enables you to provide that information to Prometheus from whichever database you store it in. Prometheus supports many common sources of service information, such as Consul, Amazon EC2, and Kubernetes out of the box. If your particular source isn’t already supported, you can use the file-based and HTTP-based service discovery mechanisms to hook it in. For file-based service discovery, this could be by having your configuration management system, such as Ansible or Chef, write the list of machines and services they know about in the right format, or a script running regularly to pull it from whatever data source you use. For HTTP-based service discovery, third-party tools such as NetBox offer plug-ins that can be installed to offer Prometheus-compatible HTTP service discovery endpoints. Note that some SD projects2 support both HTTP-based service discovery and file-based service discovery.
Knowing what your monitoring targets ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.