268K views · Dec 3, 2015 · 54:25 · 4 HN recommenders · 5 mentions · discussed 2017–2023
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.
Why Hacker News points people here: HN recommends it as a talk that makes containers click, showing that containerization is not virtualization and demystifying what Docker does.
“I watched this talk couple of years ago that made docker/containers finally click for me.”HN comment, 2017
“I watched this talk couple of years ago that made docker/containers finally click for me.”
Made containers finally click
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, this video
“This topic is perfectly covered in a presentation by”
Clarifies containerization is not virtualization
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. this video
“Then does a demo where is manually does what docker does”
Talk with demo manually doing what Docker does
Jérôme Petazzoni's talk on cgroups, namespaces, etc. I think he has given the talk a bunch of times, I saw it in person once, here is a video I found: this video He goes into cgroups, namespaces, etc. Then does a demo where is manually does what docker does, like untars an image, creates namespaces, creates the networking.
“it doesn't hurt to hear the same ideas more than once.”
One of several talks on building containers
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 - this 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.
“touches upon container primitives and compared them to jails”
Compares container primitives to jails
>There is controversy about Docker not running on FreeBSD but I believe (like many others) that FreeBSD has a more powerful tool. Jails are older and more mature - and by far - than any containerization solution on Linux. If FreeBSD jails and Solaris zones were equivalent to Linux containers, we'd have seen them take over the backend already. We haven't. They're really useful, they provided a degree of safety and peace of mind for multi-tenancy but they're not granular enough for what's done with $CONTAINER_RUNTIME these days. Jérôme Petazzoni has an old talk where he touches upon container primitives and compared them to jails : this video
