Difference between revisions of "R-Car/Virtualization/Libvirt"
< R-Car | Virtualization
(Libvirt skeleton) |
(Add virsh preparation) |
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= Virsh = | = Virsh = | ||
+ | |||
+ | 'virsh' is a commandline interface to libvirt. | ||
+ | |||
+ | == Preparation == | ||
+ | |||
+ | Before you can instantiate a guest, you have to create an XML file describing the guest. | ||
+ | Fortunately virsh provides a way to convert your QEMU command line invocation into an XML file. | ||
+ | E.g. | ||
+ | <pre> | ||
+ | $ virsh domxml-from-native qemu-argv <(echo /usr/bin/qemu-system-aarch64 -m 1024 -cpu cortex-a57 -M virt \ | ||
+ | -nographic -serial pty -kernel /path/to/linux-arm64-virt/arch/arm64/boot/Image) | \ | ||
+ | sed -e 's/unnamed/demo/' > demo.xml | ||
+ | </pre> | ||
+ | |||
+ | Caveats: | ||
+ | * Use an absolute path when referring to the QEMU binary, | ||
+ | * As libvirt's console doesn't connect to QEMU's stdout, but to a pty, your QEMU command line must include '-serial pty', | ||
+ | * Make sure 'libvirt-qemu' has permissions to access the kernel Image (and write access to the directory containing it?). | ||
+ | |||
+ | == Virsh subcommands == | ||
Revision as of 05:16, 1 February 2018
Libvirt virtualization API
Virsh
'virsh' is a commandline interface to libvirt.
Preparation
Before you can instantiate a guest, you have to create an XML file describing the guest. Fortunately virsh provides a way to convert your QEMU command line invocation into an XML file. E.g.
$ virsh domxml-from-native qemu-argv <(echo /usr/bin/qemu-system-aarch64 -m 1024 -cpu cortex-a57 -M virt \ -nographic -serial pty -kernel /path/to/linux-arm64-virt/arch/arm64/boot/Image) | \ sed -e 's/unnamed/demo/' > demo.xml
Caveats:
- Use an absolute path when referring to the QEMU binary,
- As libvirt's console doesn't connect to QEMU's stdout, but to a pty, your QEMU command line must include '-serial pty',
- Make sure 'libvirt-qemu' has permissions to access the kernel Image (and write access to the directory containing it?).