da224b3a05
Import the following files from the former config-reference [1]: api.rst cells.rst fibre-channel.rst hypervisor-basics.rst hypervisor-hyper-v.rst hypervisor-kvm.rst hypervisor-lxc.rst hypervisor-qemu.rst hypervisor-virtuozzo.rst hypervisor-vmware.rst hypervisor-xen-api.rst hypervisor-xen-libvirt.rst hypervisors.rst index.rst iscsi-offload.rst logs.rst resize.rst samples/api-paste.ini.rst samples/index.rst samples/policy.yaml.rst samples/rootwrap.conf.rst schedulers.rst The below files are skipped as they're already included, in slightly different forms, in the nova documentation. config-options.rst nova-conf-samples.rst nova-conf.rst nova.conf Part of bp: doc-migration Change-Id: I145e38149bf20a5e068f8cfe913f90c7ebeaad36
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1.4 KiB
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57 lines
1.4 KiB
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.. _compute_qemu:
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====
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QEMU
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====
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From the perspective of the Compute service, the QEMU hypervisor is
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very similar to the KVM hypervisor. Both are controlled through libvirt,
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both support the same feature set, and all virtual machine images that
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are compatible with KVM are also compatible with QEMU.
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The main difference is that QEMU does not support native virtualization.
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Consequently, QEMU has worse performance than KVM and is a poor choice
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for a production deployment.
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The typical uses cases for QEMU are
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* Running on older hardware that lacks virtualization support.
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* Running the Compute service inside of a virtual machine for
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development or testing purposes, where the hypervisor does not
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support native virtualization for guests.
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To enable QEMU, add these settings to ``nova.conf``:
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.. code-block:: ini
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compute_driver = libvirt.LibvirtDriver
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[libvirt]
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virt_type = qemu
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For some operations you may also have to install the
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:command:`guestmount` utility:
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On Ubuntu:
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.. code-block:: console
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# apt-get install guestmount
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On Red Hat Enterprise Linux, Fedora, or CentOS:
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.. code-block:: console
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# yum install libguestfs-tools
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On openSUSE:
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.. code-block:: console
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# zypper install guestfs-tools
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The QEMU hypervisor supports the following virtual machine image formats:
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* Raw
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* QEMU Copy-on-write (qcow2)
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* VMware virtual machine disk format (vmdk)
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