Book Image

Monitoring Docker

By : Russ McKendrick
Book Image

Monitoring Docker

By: Russ McKendrick

Overview of this book

This book will show you how monitoring containers and keeping a keen eye on the working of applications helps improve the overall performance of the applications that run on Docker. With the increased adoption of Docker containers, the need to monitor which containers are running, what resources they are consuming, and how these factors affect the overall performance of the system has become the need of the moment. This book covers monitoring containers using Docker's native monitoring functions, various plugins, as well as third-party tools that help in monitoring. Well start with how to obtain detailed stats for active containers, resources consumed, and container behavior. We also show you how to use these stats to improve the overall performance of the system. Next, you will learn how to use SysDig to both view your containers performance metrics in real time and record sessions to query later. By the end of this book, you will have a complete knowledge of how to implement monitoring for your containerized applications and make the most of the metrics you are collecting
Table of Contents (15 chapters)
Monitoring Docker
About the Author
About the Reviewer

Chapter 5. Querying with Sysdig

The previous tools we have looked at have all relied on making API calls to Docker or reading metrics from LXC. Sysdig works differently by hooking itself into the hosts machine's kernel while this approach does go against Docker's philosophy of each service being run in its own isolated container, the information you can get by running Sysdig only for a few minutes far outweighs any arguments about not using it.

In this chapter, we will look at the following topics:

  • How to install Sysdig and Csysdig on the host machine

  • Basic usage and how to query your containers in real time

  • How to capture logs so they can be queried later