prepare environment
# Is environment prepared for viritutalization.
egrep '(vmx|svm)' /proc/cpuinfo
vmx - (intel) svm - (amd)
Create disk image.
qemu-img create -f qcow2 fedora20.halfface.se.qcow2 50G
# Install software.
yum install -y qemu kvm SDL bridge-utils tunctl
install virtual machine.
virt-install --connect qemu:///system --name Fedora_16 --ram 2048 --vcpus=1 -f /ssd/libvirt/Fedora_16.qcow2 -s 30 -c /install/system/linux/fedora/16/Fedora-16-x86_64-netinst.iso --vnc --noautoconsole --hvm
delete virtual machine.
virsh undefine kvm_1
connect to virtual machine.
virt-viewer Fedora_16
convert file format
# img to qcow2
qemu-img convert -cp -O qcow2 kvm_1.img kvm_1.qcow2
# vmdk to qcow2
qemu-img convert disk0.vmdk -O qcow2 bigbluebutton.qcow2
snapshot
# Create snapshot
virsh snapshot-create SL_63
# List snapshots
virsh snapshot-list SL_63
# Delete snapshot
virsh snapshot-delete SL_63 1346734871
# Revert to snapshot
snapshot-revert
virsh snapshot-revert fedora20_2.halfface.se 1414336149
list information
# Simple information about domain.
virsh dominfo fedora_20_raid1
# View information about domain.
virsh dumpxml fedora_20_raid1 | less
disk handling
# Detach one of the disks.
virsh detach-disk fedora_20_raid1 vda
# Attach disk
virsh attach-disk fedora_20_raid1 /ssd/libvirt/fedora20_1.qcow2 vda --sourcetype file --subdriver qcow2
# Copy kvm machine.
virsh dumpxml <domain> > domain.xml
vi domain.xml
virsh create domain.xml
# Eject cdrom.
virsh change-media www.halfface.se hda --eject