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Cgroups, namespaces, and beyond: what are containers made from?

Docker · 267.9K views · 2015-12-03 · 54:25

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Overview

Jérôme Petazzoni explains how Linux containers are built from kernel features like cgroups, namespaces and SELinux. He demonstrates putting the pieces together by hand to make a container and compares runtimes and approaches like jails and zones.

On Hacker News

HN recommends it as a talk that makes containers click, showing that containerization is not virtualization and demystifying what Docker does.

Recommended by 4 HN people across 3 months · HN mentions 2017–2023

Topics

Operating systems & kernelsCloud, DevOps & reliabilityLinux & open-source ecosystems
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cgroupsnamespacesdockercontainerslinux kernel

What people said

dmpanch · 2023-06 · Strong recommendation

This topic is perfectly covered in a presentation by Jérôme Petazzoni from Dockercon 2015, a Docker developer, on how containerization works. After watching the video, I began to clearly understand that this is not virtualization at all, as many at first imagine. [VIDEO]

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dominotw · 2017-12 · Strong recommendation

I watched this talk couple of years ago that made docker/containers finally click for me. Cgroups, namespaces, and beyond: what are containers made from? - Jérôme Petazzoni, [VIDEO]

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hardwaresofton · 2018-04 · Recommendation

In the same vein: Building a container from scratch in Go (Liz Rice) @ Container Camp 2016 -> [LINK] What's a container really let's write one in go from sctach (Liz Rice) @ Golang UK Conference -> [LINK] Cgroups, Namespaces and beyond: What are containers made from (Jerome Petazzoni) @ DockerCon 2015 - [VIDEO] Building Containers in Pure Bash and C (Jessica Frazelle) @ ContainerSummit 2016: [LINK] First two are basically the same talk, but it doesn't hurt to hear the same ideas more than once.

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Sources

Video by Docker, played through YouTube.

Data and selection notes

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