Kvm notes sandbox

Good links

openSUSE Guide
RHEL Guide

Forward kvm host qemu vnc with ssh

$ ssh -L 5900:localhost:5900 <kvm-host-ip> -N

List all guests even not started

# virsh list --all

Guest migration

Dump config

virsh dumpxml --migratable <guest-name> >guest-name.xml

Restore guest config on new host

virsh create guest-name.xml

Create guest

virt-install --name <name> --connect qemu:///system --virt-type kvm --memory 30720 --vcpus 8 --nodisks \
--os-variant opensuse42 --network bridge=br0 --boot=hd --pxe --vnc --vnclisten=localhost --vncport=5900

Attach block device to guest

Create xml config for example vda.xml

<disk type='block' device='disk'>
      <driver name='qemu' type='raw' cache='none'/>
      <source dev='/dev/sda5'/>
      <target dev='vda' bus='virtio'/>
</disk>

Permanently attach block device to already existing domain
<pre>
# virsh attach-disk <domain-name> vda.xml --persistent