Containerization (computing): Difference between revisions

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== Usage ==

The ''containers'' are basically a fully functional and portable cloud or non-cloud computing environment surrounding the application and keeping it independent of other parallelly running environments.<ref>{{Cite web|title=What is containerization?|url=https://www.redhat.com/en/topics/cloud-native-apps/what-is-containerization|url-status=live|access-date=2021-07-10|website=www.redhat.com|publisher=[[RedHat]]|language=en|archive-url=https://web.archive.org/web/20210508174632/https://www.redhat.com/en/topics/cloud-native-apps/what-is-containerization |archive-date=2021-05-08 }}</ref> Individually each container simulates a different software application and runs isolated processes<ref>{{Cite web|last1=Hinck|first1=Tim Maurer, Garrett|last2=Hinck|first2=Tim Maurer, Garrett|title=Cloud Security: A Primer for Policymakers|url=https://carnegieendowment.org/2020/08/31/cloud-security-primer-for-policymakers-pub-82597|access-date=2021-07-10|website=Carnegie Endowment for International Peace|language=en}}</ref> by bundling related configuration files, libraries and dependencies.<ref>{{Cite web|last=Rubens|first=Paul|date=2017-06-27|title=What are containers and why do you need them?|url=https://www.cio.com/article/2924995/what-are-containers-and-why-do-you-need-them.html|access-date=2021-07-10|website=CIO|language=en}}</ref> But, collectively multiple containers share a common [[Kernel (operating system)|OSoperating Kernelsystem kernel]] (OS).<ref>{{Cite web|title=Containerization|url=https://www.ibm.com/in-en/cloud/learn/containerization|access-date=2021-07-10|website=www.ibm.com|language=en-in}}</ref>

In recent times, the containerization technology has been vastlywidely adopted by cloud computing platforms like [[Amazon Web Services]], [[Microsoft Azure]], [[Google Cloud Platform]], and [[IBM Cloud]].<ref>{{Cite web|last=December 2019|first=Jonas P. DeMuro 18|title=What is container technology?|url=https://www.techradar.com/in/news/what-is-container-technology|access-date=2021-07-10|website=TechRadar India|date=18 December 2019|language=en}}</ref> Containerization has also been pursued by the U.S. Department of Defense as a way of more rapidly developing and fielding software updates, with first application in its [[Lockheed Martin F-22 Raptor|F-22]] air superiority fighter.<ref>{{cite web |url=https://aviationweek.com/defense-space/sensors-electronic-warfare/flight-test-clears-f-22-fleet-accept-third-party-software |title=Flight Test Clears F-22 Fleet To Accept Third-Party Software |work=Aviation Week |date=30 August 2022}}</ref>

== Types of containers ==

* OS containers

* AppsApplication containers

=== Security issues ===

*Because of commonthe shared OS, security threats can affect the whole containerized system.

*In containerized environments, security scanners generally protect the OS but not the application containers, which adds unwanted vulnerability.

== Container management, orchestration, clustering ==

Container orchestration or container management is mostly used in the context of application containers. Implementations providing such an orchestration include [[Kubernetes]] and [[docker (software)|Docker swarm]].

== Container cluster management ==