Kvm
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
investigate qcow2
qemu-img info $machine.qcow2
list all domain blocks
virsh domblklist $vm
list info about block device
virsh domblkstat $vm vda --human
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
list libvirt storage pools
virsh pool-list --all
connect to virtual machine.
virt-viewer Fedora_16
On remote machine over ssh
virt-viewer --connect qemu+ssh://root@anden.halfface.se/system win8
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
change value of virtual machine
virsh autostart virtual_machine_name
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 virsh attach-disk host /var/lib/libvirt/images/host-#.qcow2 vdb --driver qemu --subdriver qcow2 --targetbus virtio --persistent
# 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
duplicate move machine
# You cannot "clone" a running vm, stop it. suspend and destroy
# are also valid options for less graceful cloning
virsh shutdown this.vm
# copy the storage.
cp /var/lib/libvirt/images/{this-vm,that-vm}.img
# dump the xml for the original
virsh dumpxml this-vm > /tmp/that-vm.xml
# hardware addresses need to be removed, libvirt will assign
# new addresses automatically
sed -i /uuid/d /tmp/that-vm.xml
sed -i '/mac address/d' /tmp/that-vm.xml
# and actually rename the vm: (this also updates the storage path)
sed -i 's/this-vm/that-vm/g' /tmp/that-vm.xml
# finally, create the new vm
virsh define /tmp/that-vm.xml
virsh start this-vm
virsh start that-vm
virt-convert
Convert vmware image to kvm.
virt-convert . --disk-format qcow2 --destination .
drivers
Drivers for other os and enhancements.
https://www.spice-space.org/download.html
access via spice
remote-viewer spice://10.151.105.122:5900
pvs
List usage of pv