TOPIC 3

Date: 2/5/2014
Server virtualization with KVM
Linux for Engineering and IT Applications


Cloning VMs in KVM


Cloning kvm1
  • In default KVM configuration, the VM disk images are stored in directory /var/lib/libvirt/images and the VM configurations in directory /etc/libvirt/qemu.
    The image files take large space, so we need to create an additional folder to store them: 
    mkdir /home/hostadm/KVM
chmod 755 /home/hostadm/KVM

  • Prepare kvm1 for cloning: 
    virsh shutdown kvm1 
chmod a+r /var/lib/libvirt/images/kvm1.img

  • Launch virt-manager. Right click onto kvm1 and select to "clone". Name the cloned system kvm2.
    For the storage option, select "Details",
    then specify the new path: /home/hostadm/KVM/kvm2.img
    Keep the default configuration settings for the other parameters.
    This will be a new VM with the systems configurations originally set in kvm1.
  • After the cloning procedure is completed, boot kvm2. Login to the system as user hostadm, elevate privileges by running sudo -s, then follow the procedure below to change the host name from kvm1 to kvm2.
    Remove file /etc/udev/rules.d/70-persistent-net.rules 
    rm /etc/udev/rules.d/70-persistent-net.rules
    Edit file /etc/hostname and replace kvm1 by kvm2.
    Edit file /etc/hosts and remove the line containing 127.0.1.1 kvm1.
    Reboot.



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