Xen Project Hypervisor: Difference between revisions

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[[File:Xen-project-logo.png|thumb|The Xen Project Logo]]

The ~~'''~~[https://xenproject.org/ ~~{{PAGENAME}}]''' ([[wikipedia:en:~~Xen]]) is an open-source type-1 virtual machine manager, which allows multiple virtual machines, known as domains, to run concurrently with the host on the physical machine. This is unlike a typical type-2 hypervisor, such as [[QEMU]], where the virtual machines run as applications on top of the host. NixOS runs as the privileged Domain 0, and can paravirtualise or fully virtualise Unprivileged Domains (<code>domUs</code>).

The [https://xenproject.org/ Xen Project Hypervisor] is an open-source type-1 virtual machine manager, which allows multiple virtual machines, known as domains, to run concurrently with the host on the physical machine. This is unlike a typical type-2 hypervisor, such as [[QEMU]], where the virtual machines run as applications on top of the host. NixOS runs as the privileged Domain 0, and can paravirtualise or fully virtualise Unprivileged Domains (<code>domUs</code>).

Xen is well-known for its [https://xenbits.xenproject.org/xsa impeccable security record], and is the go-to solution for hyper-scale cloud infrastructures.

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If you are interested in managing Xen domains declaratively, please take a look at pull request {{pull|363388}} and everything else tagged with the <code>declarative libxenlight</code> title.

~~=== Troubleshooting ===~~

~~==== <code>error: device model qemu-dm is not executable: No such file or directory</code> ====~~

This error follows a <code>qemu-xen is unavailable, using qemu-xen-traditional instead</code> message. This is an upstream bug in Xen, and can be fixed by pull request {{pull|365890}}, or by overriding the QEMU path in your domain configuration:

~~{{file|example-hvm.cfg|cfg|~~

~~<nowiki>~~

~~device_model_override='/run/current-system/sw/bin/qemu-system-i386'~~

~~</nowiki>~~

}}

== See also ==

@@ Line 1: / Line 1: @@
 [[File:Xen-project-logo.png|thumb|The Xen Project Logo]]
-The '''[https://xenproject.org/ {{PAGENAME}}]''' ([[wikipedia:en:Xen]]) is an open-source type-1 virtual machine manager, which allows multiple virtual machines, known as domains, to run concurrently with the host on the physical machine. This is unlike a typical type-2 hypervisor, such as [[QEMU]], where the virtual machines run as applications on top of the host. NixOS runs as the privileged <b>Domain 0</b>, and can paravirtualise or fully virtualise Unprivileged Domains (<code>domUs</code>).
+The <strong>[https://xenproject.org/ Xen Project Hypervisor]</strong> is an open-source type-1 virtual machine manager, which allows multiple virtual machines, known as domains, to run concurrently with the host on the physical machine. This is unlike a typical type-2 hypervisor, such as [[QEMU]], where the virtual machines run as applications on top of the host. NixOS runs as the privileged <b>Domain 0</b>, and can paravirtualise or fully virtualise Unprivileged Domains (<code>domUs</code>).
 Xen is well-known for its [https://xenbits.xenproject.org/xsa impeccable security record], and is the go-to solution for hyper-scale cloud infrastructures.
@@ Line 72: / Line 72: @@
 If you are interested in managing Xen domains declaratively, please take a look at pull request {{pull|363388}} and everything else tagged with the <code>declarative libxenlight</code> title.
-=== Troubleshooting ===
-==== <code>error: device model qemu-dm is not executable: No such file or directory</code> ====
-This error follows a <code>qemu-xen is unavailable, using qemu-xen-traditional instead</code> message. This is an upstream bug in Xen, and can be fixed by pull request {{pull|365890}}, or by overriding the QEMU path in your domain configuration:
-{{file|example-hvm.cfg|cfg|
-<nowiki>
-device_model_override='/run/current-system/sw/bin/qemu-system-i386'
-</nowiki>
-}}
 == See also ==