1.5 KiB
1.5 KiB
Documentation → Usage → QEMU and qemu-img
QEMU and qemu-img
QEMU
You need patched QEMU version to use Vitastor driver. Pre-built packages are available.
To start a VM using plain QEMU command-line with Vitastor disk, use the following commands:
Old syntax (-drive):
qemu-system-x86_64 -enable-kvm -m 1024 \
-drive 'file=vitastor:etcd_host=192.168.7.2\:2379/v3:image=debian9',
format=raw,if=none,id=drive-virtio-disk0,cache=none \
-device 'virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,
id=virtio-disk0,bootindex=1,write-cache=off' \
-vnc 0.0.0.0:0
New syntax (-blockdev):
qemu-system-x86_64 -enable-kvm -m 1024 \
-blockdev '{"node-name":"drive-virtio-disk0","driver":"vitastor","image":"debian9",
"cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-device 'virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,
id=virtio-disk0,bootindex=1,write-cache=off' \
-vnc 0.0.0.0:0
qemu-img
For qemu-img, you should use vitastor:etcd_host=<HOST>:image=<IMAGE>
as filename.
For example, to upload a VM image into Vitastor, run:
qemu-img convert -f qcow2 debian10.qcow2 -p -O raw 'vitastor:etcd_host=192.168.7.2\:2379/v3:image=debian10'
You can also specify :pool=<POOL>:inode=<INODE>:size=<SIZE>
instead of :image=<IMAGE>
if you don't want to use inode metadata.