Container Linux: Difference between revisions

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| package manager =

| succeeded by = Fedora CoreOS<br>RHEL CoreOS<br>Flatcar Container Linux

| repo = {{URL|github.com/coreos}}

| website = {{URL|https://coreos.com}}<ref>{{Cite web |date=2021-01-21 |title=CoreOS Container Linux 2514.1.0 Documentation |url=https://coreos.com/os/docs/latest/ |access-date=2021-01-21 |website=coreos.com |archive-date=2021-01-21 |archive-url=https://web.archive.org/web/20210121163852/https://coreos.com/os/docs/latest/}}</ref>

}}

'''Container Linux''', (formerly '''CoreOS Linux'''), is a discontinued [[Open-source software|open-source]] lightweight [[operating system]] based on the [[Linux kernel]] and designed for providing infrastructure for [[Computer cluster|clustered]] deployments. One of its focuses was [[scalability]]. As an operating system, Container Linux provided only the minimal functionality required for deploying applications inside [[software container]]s, together with built-in mechanisms for [[service discovery]] and configuration sharing.<ref name="container-linux-rename">{{Cite web

| url = https://coreos.com/blog/tectonic-self-driving.html#coreos-linux-is-now-container-linux

| title = CoreOS Linux is now Container Linux

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}}</ref>

The CoreOS team announced the [[End-of-life (product)|end-of-life]] for Container Linux on May 26, 2020,<ref name=eol /> offering [[Fedora (operating system)#CoreOS|Fedora CoreOS]],<ref>{{Cite web|title=Fedora CoreOS Documentation :: Fedora Docs Site|url=https://docs.fedoraproject.org/en-US/fedora-coreos/|access-date=2020-08-16|website=docs.fedoraproject.org}}</ref> and RHEL CoreOS as its replacement, both based on [[Red Hat Enterprise Linux|RHEL]] CoreOS as its replacement.

== {{Anchor|ROCKET|APPC|ACI|OCP|OCI|RKT}}Overview ==

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| date = March 10, 2014 | access-date = January 20, 2015

| website = docker.com

}}</ref> to the operating-system-level virtualization features of the Linux kernel, as well as providing a standardized format for containers that allows applications to run in different environments.<ref name="linux.com-737364" /><ref name="coreos-containers" /> In December 2014, CoreOS released and started to support '''rkt''' (initially released as ''Rocket'') as an alternative to Docker, providing through it another standardized format of the application-container images, the related definition of the container [[runtime environment]], and a [[Communications protocol|protocol]] for discovering and retrieving container images.<ref>{{Cite web

| url = https://www.linux.com/news/featured-blogs/200-libby-clark/806347-collaboration-summit-keynote-alex-polvi-coreos

| title = CoreOS Co-Founder Alex Polvi Talks Containers, Rocket vs. Docker, and More

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| quote = Announced at the DockerCon conference in San Francisco on Monday, the Open Container Project (OCP) will maintain and develop a common container runtime and image format based in part on code and specs donated by Docker.

}}

</ref> which was announced{{ by whom|date=Januarya group of large tech 2017}}companies in June 2015.<ref>{{cite news

| url = https://techcrunch.com/2015/06/22/docker-coreos-google-microsoft-amazon-and-others-agree-to-develop-common-container-standard/

| title = Docker, CoreOS, Google, Microsoft, Amazon and others come together to develop common container standard

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Following its acquisition of CoreOS, Inc.<ref>{{Cite web|url=https://www.cnbc.com/2018/01/30/red-hat-buys-coreos-for-250-mililon.html|title=Red Hat pays $250 million for CoreOS, a start-up that sells Google-developed technology|last=Rosoff|first=Matt|date=2018-01-30|website=CNBC|language=en|access-date=2019-06-06}}</ref> in January 2018, Red Hat announced<ref>{{Cite web|url=https://coreos.com/blog/fedora-coreos-red-hat-coreos-and-future-container-linux|title=Fedora CoreOS, Red Hat CoreOS, and the future of Container Linux {{!}} CoreOS|website=coreos.com|access-date=2019-06-06}}</ref> that it would be merging CoreOS Container Linux with Red Hat's Project Atomic to create a new operating system, Red Hat CoreOS, while aligning the upstream Fedora Project open source community around Fedora CoreOS, combining technologies from both predecessors.

On March 6, 2018, Kinvolk GmbH announced Flatcar Container Linux, a derivative of CoreOS Container Linux.<ref>{{Cite web|url=https://kinvolk.io/blog/2018/03/announcing-the-flatcar-linux-project/|title=Announcing the Flatcar Linux project {{!}} Kinvolk|website=kinvolk.io|date=March 6, 2018 |access-date=2019-06-06}}</ref> [https://www.flatcar-linux.org/ Flatcar Container Linux], a derivative of CoreOS Container Linux. This tracks the upstream CoreOS alpha, beta, and stable channel releases, with an experimental Edge release channel added in May 2019.<ref>{{Cite web|url=https://kinvolk.io/blog/2019/05/introducing-the-flatcar-linux-edge-channel/|title=Introducing the Flatcar Linux Edge Channel {{!}} Kinvolk|website=kinvolk.io|date=May 15, 2019 |access-date=2019-06-06}}</ref>

== Reception ==

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== External links ==

{{Commons category|CoreOS}}

* Official {{Official website|https://coreos.com/|CoreOS}} and [[GitHub]] source code repositories: {{GitHub|coreos|CoreOS|link=hidden}}, {{GitHub|coreos/etcd|etcd|link=hidden}}, {{GitHub|coreos/fleet|fleet|link=hidden}}, {{GitHub|coreos/rkt|rkt|link=hidden}} and {{GitHub|coreos/coreos-overlay|CoreOS-overlay|link=hidden}}

* {{DistroWatch|CoreOS|name=CoreOS}}

* [http://www.sebastien-han.fr/blog/2013/09/03/first-glimpse-at-coreos/ First glimpse at CoreOS], September 3, 2013, by Sébastien Han

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* [https://www.phoronix.com/scan.php?page=news_item&px=CoreOS-Btrfs-To-EXT4-OverlayFS CoreOS moves from Btrfs to Ext4&nbsp;+ OverlayFS], [[Phoronix]], January 18, 2015, by Michael Larabel

* [https://lwn.net/Articles/646054/ Containers and persistent data], [[LWN.net]], May 28, 2015, by Josh Berkus

* [https://www.flatcar-linux.org/ Flatcar Container Linux]

{{Linux distributions}}{{Virtualization software}}

{{Linux containers}}