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Using VIR_DOMAIN_XML_MIGRATABLE flag, one can request domain's XML configuration that is suitable for migration or save/restore. Such XML may contain extra run-time stuff internal to libvirt and some default configuration may be removed for better compatibility of the XML with older libvirt releases. This flag may serve as an easy way to get the XML that can be passed (after desired modifications) to APIs that accept custom XMLs, such as virDomainMigrate{,ToURI}2 or virDomainSaveFlags.
LibVirt : simple API for virtualization Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aim at providing long term stable C API initially for the Xen paravirtualization but should be able to integrate other virtualization mechanisms if needed. Daniel Veillard <veillard@redhat.com>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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