January 2017
Beginner
66 pages
1h 14m
English
Content preview from Monitoring Taxonomy
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Chapter 4. traditional.free_open.collectors.system
You will find most standalone open source metrics collectors here. Right now only collectD is listed, but I expect this section will grow as other standalone collectors (like Diamond and Telegraf) become more popular.
CollectD: Everybody’s Favorite Monitoring Agent
CollectD is a Unix daemon that collects, and transfers performance data from your hosts. You can think of it as a standalone open-source agent. You install it on every system you want to monitor. It collects metrics from your systems and emits them to other monitoring systems for processing.
CollectD was written in C and is extremely fast and modular. Many plug-ins exist that enable it to collect metrics on just about any off-the-shelf software you might be running from Apache to Zookeeper.
Push, Pull, Both, or Neither?
CollectD is a push-based system.
Measurement resolution
The CollectD daemon reports every 10 seconds by default.
Data Storage
None. Data acquisition and storage is handled by plug-ins.
Analysis Capabilities
None. CollectD is a standalone agent, designed to interact with other monitoring systems for analysis.
Notification Capabilities
You can configure notifications by setting a severity and a time. This is useful for informing users about a noticeable condition such as high CPU load. When a notification is triggered it is dispatched the same way that the performance metrics are.
Various plug-ins can send or receive notifications. For instance ...
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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.