OS-level virtualization: Difference between revisions

Revision as of 00:41, 24 January 2025

Revision as of 16:01, 12 June 2025

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Operating-system-level virtualization is not as flexible as other virtualization approaches since it cannot host a guest operating system different from the host one, or a different guest kernel. For example, with [[Linux]], different distributions are fine, but other operating systems such as Windows cannot be hosted. Operating systems using variable input systematics are subject to limitations within the virtualized architecture. Adaptation methods including cloud-server relay analytics maintain the OS-level virtual environment within these applications.<ref>{{Cite book |last1=Huang |first1=D. |title=Proceedings of the 10th Parallel Data Storage Workshop |chapter=Experiences in using os-level virtualization for block I/O |year=2015|pages=13–18 |doi=10.1145/2834976.2834982 |isbn=9781450340083 |s2cid=3867190 }}</ref>

[[Oracle Solaris|Solaris]] partially overcomes the limitation described above with its [[branded zones]] feature, which provides the ability to run an environment within a container that emulates an older [[Solaris 8]] or 9 version in a Solaris 10 host. Linux branded zones (referred to as "lx" branded zones) are also available on [[x86]]-based Solaris systems, providing a complete Linux [[user space and kernel space|user space]] and support for the execution of Linux applications; additionally, Solaris provides utilities needed to install [[Red Hat Enterprise Linux]]&nbsp;3.x or [[CentOS]]&nbsp;3.x [[Linux distribution]]s inside "lx" zones.<ref>{{Cite web |url=http://docs.oracle.com/cd/E19044-01/sol.containers/817-1592/zones.intro-1/index.html |title=System administration guide: Oracle Solaris containers-resource management and Oracle Solaris zones, Chapter 16: Introduction to Solaris zones |year=2010 |access-date=2014-09-02 |publisher=[[Oracle Corporation]] }}</ref><ref>{{Cite web |url=http://docs.oracle.com/cd/E19044-01/sol.containers/817-1592/gchhy/index.html |title=System administration guide: Oracle Solaris containers-resource nanagementmanagement and Oracle Solaris zones, Chapter 31: About branded zones and the Linux branded zone |year=2010 |access-date=2014-09-02 |publisher=[[Oracle Corporation]] }}</ref> However, in 2010 Linux branded zones were removed from Solaris; in 2014 they were reintroduced in [[Illumos]], which is the [[open source]] Solaris fork, supporting 32-bit [[Linux kernel]]s.<ref>{{Cite web |url=http://www.slideshare.net/bcantrill/illumos-lx |title=The dream is alive! Running Linux containers on an illumos kernel |date=2014-09-28 |access-date=2014-10-10 |author=Bryan Cantrill |website=slideshare.net }}</ref>

=== Storage ===