Difference between revisions of "Main Page/IT/Virtualisation"
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==Compress a qcow2 disk image== | ==Compress a qcow2 disk image== | ||
| − | <pre> | + | <pre>qemu-img convert -c -f qcow2 -O qcow2 -o cluster_size=2M myold_disk.qcow2 mynew_disk.qcow2</pre> |
==Install an existing VM from the command line using virt-install== | ==Install an existing VM from the command line using virt-install== | ||
Latest revision as of 13:44, 10 March 2014
Contents
KVM
Stuff relevant to qemu-kvm
Create a qcow2 disk image
This will be provisoned "thinly" so the file will grow as data is written into it.
qemu-img create -f qcow2 mydisk.qcow2 8G
Compress a qcow2 disk image
qemu-img convert -c -f qcow2 -O qcow2 -o cluster_size=2M myold_disk.qcow2 mynew_disk.qcow2
Install an existing VM from the command line using virt-install
This will spin up a new VM given an existing disk image. One virtio disk and one virtio NIC on br100.
virt-install --name <<Your machine name>> --hvm --ram 512 --disk path=<<path to your existing OS image>>,format=qcow2,bus=virtio --import --network bridge=br100,model=virtio --vnc --os-type=linux --os-variant=debianwheezy
Start a fresh install of VM from command line
Creates a VM called windows8-test and starts an install of windows from an iso image.
virt-install --name windows8-test --hvm --ram 1024 --disk path=./windows8-test-disk1.qcow2,format=qcow2,bus=virtio --network bridge=br100,model=virtio --vnc --os-type=windows --cdrom /mnt/vmimages/iso/Windows\ 8\ Retail\(MSDN\)Pro\ x64\ bit.ISO
