Difference between revisions of "Qemu-img"
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* <code>qemu-img resize YOUR_IMAGE.qcow2 +SIZE</code><ref>https://maunium.net/blog/resizing-qcow2-images/</ref> ([[KVM/Extend LVM on qcow2 images]])<ref>https://serverfault.com/questions/324281/how-do-you-increase-a-kvm-guests-disk-space</ref> | * <code>qemu-img resize YOUR_IMAGE.qcow2 +SIZE</code><ref>https://maunium.net/blog/resizing-qcow2-images/</ref> ([[KVM/Extend LVM on qcow2 images]])<ref>https://serverfault.com/questions/324281/how-do-you-increase-a-kvm-guests-disk-space</ref> | ||
| − | * <code>[[qemu-img snapshot]]</code> (See also: <code>[[ | + | * <code>[[qemu-img snapshot]]</code> (See also: <code>[[lvcreate]] --snapshot</code> for LVM snapshots) |
== Activities == | == Activities == | ||
Revision as of 11:02, 2 January 2020
qemu-img[1] allows you to create, convert and modify images offline, It can handle all image formats supported by QEMU.
qemu-img createqemu-img create -f qcow2 MY_IMAGE_NAME.img 3Gqemu-img create -f qcow2 -o preallocation=metadata,compat=1.1,lazy_refcounts=on MY_IMAGE_NAME.img
lazy_refcounts=onReference count updates are postponed with the goal of avoiding metadata I/O and improving performance. Particularly interesting with cache=writethrough.
- Create a snapshot:
qemu-img create -f qcow2 -o backing_file=original snapshot.qcow[3]
qemu-img convertqemu-img checkqemu-img check -r all
qemu-img resize YOUR_IMAGE.qcow2 +SIZE[4] (KVM/Extend LVM on qcow2 images)[5]
qemu-img snapshot(See also:lvcreate --snapshotfor LVM snapshots)
Activities
See also
virtinst(package):virt-install,virt-clone,virt-convertandvirt-xml- virt-manager
- https://en.wikibooks.org/w/index.php?title=QEMU/Images
- KVM, Installation, QEMU,
virsh,virtinst,libguestfs-tools, libvirt, qemu, Red Hat Virtualization (RHV), MacVTap, Virtio, oVirt, KVM services, KVM networking, KVM graphics, CPU, KVM on ARM
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Source: wikiversity
- ↑ https://manpages.debian.org/testing/qemu-utils/qemu-img.1.en.html
- ↑ https://manpages.debian.org/testing/qemu-utils/qemu-img.1.en.html
- ↑ http://libguestfs.org/virt-sysprep.1.html#copying-and-cloning
- ↑ https://maunium.net/blog/resizing-qcow2-images/
- ↑ https://serverfault.com/questions/324281/how-do-you-increase-a-kvm-guests-disk-space
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