Talk:OS-level virtualization: Difference between revisions

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== Add information about Kata Containers ==

Kata Containers has just released version 1.0. The technology is basically qemu but with all hardware virtualization removed. Intel has been working on it for a couple of ears and it was highly talked about at the big OpenStack meetup in Canada in May 2018. https://katacontainers.io/ --[[User:Svintoo|Svintoo]] 2018-05-29 09:14 (UTC)

== Definition of ''container'' ==

While researching for this article, I've noticed different definitions of ''container'' depending on what aspects of the technology the authors want to stress. For example, Docker defines a container as "a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another" [https://www.docker.com/resources/what-container], while this article (before I rewrote the lead) defined a container as an instance of a virtual userspace created thru OS-level virtualization [https://en.wikipedia.org/w/index.php?title=Container_(virtualization)&oldid=885636072]. Since Docker is the most widespread container framework, the lead should give due weight to their definition (which stresses portability). <span style="white-space: nowrap;">[[User:Qzekrom|Qzekrom]] [[User talk:Qzekrom|💬]] ^they_them</span> 18:24, 3 March 2019 (UTC)

== Renaming back to “OS-level virtualisation” ==

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: I stumbled into this page, and as an industry veteran of multiple decades, I very much agree with the "dangerous misconception" statement above. OS containers are about *isolation* not *virtualization*. These are distinct concepts in the tech world, and this page/article is incorrectly conflating them in a way that will hurt industry discourse and general understanding for its readers. Container isolation can only be considered "virtualization" in the weakest sense of the word virtualization, which is a sense that is not typically used in the industry because it then becomes a useless word. To give an analogy, process isolation is about permission: within an isolated process namespace, processes do not have permission to see processes from outside of that namespace. By analogy, on a typical filesystem, the permissions of the filesystem are unlikely to allow user A to deeply traverse into user B's personal home area. Would one then say that "the filesystem permissions are an OS-level virtualization because from a user A process's perspective it cannot access user B's storage resources and thus is seeing a 'virtualized disk that doesn't contain user B's resources'"? Of course not. Perhaps we could benefit from a clarification section _somewhere_ about the difference between "the literal english word's meaning" and "the common meaning in industry in the context in which this article lives", where one of those includes things like "containers" and the other doesn't.

: As I'm not typically a wikipedia editor, how do disputes about fundamental definitions or "terms of art" get resolved? Do I just add a "This is classification or definition is disputed" text or label to the page? [[User:VDave420|VDave420]] ([[User talk:VDave420|talk]]) 23:57, 10 March 2023 (UTC)

== Flexibility section: Unclear sentence about "server relay analytics" ==

This sentence is not just hard to parse, I don't see how it's related to the topic, nor how it's supported by its source:

> Adaptation methods including cloud-server relay analytics maintain the OS-level virtual environment within these applications.[5]

First, "adaptation" to what? The prior sentences mention inability to host Windows within Linux container and sensitivity to "input systematics" (whatever that is?!) but I don't see how relaying analytics through the cloud can help with either of those.

The [https://www.pdsw.org/pdsw15/papers/p13-huang.pdf cited paper] is specifically about disk I/O performance, and only mentions "analytics" and once a "server" among example apps they were running inside containers, not as solution to anything. The paper doesn't look related to _anything_ in "Flexibility" section.

[[User:Cbensf|Cbensf]] ([[User talk:Cbensf|talk]]) 13:07, 15 July 2024 (UTC)