TOPIC 3

Date: 2/5/2020
Server virtualization with KVM
Linux System Administration


Exercise: Cloning VMs with virt-clone

  • On the desktop, edit file .bashrc in the home directory of hostadm, and add the following line in the end of the file: 
    export LIBVIRT_DEFAULT_URI='qemu:///system'
    Run command 
    source .bashrc

  • Clone kvm1 to a new VM host, kvm3, by executing the command below: 
    virt-clone -o kvm1 -n kvm3 -f /home/hostadm/KVM/kvm3.qcow2
  • Check if the new VM is in the list, start it, then login to its console: 
    virsh list --all
virsh start kvm3
virsh console kvm3
  • Fix the host name:
    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 kvm3:
    Edit file /etc/hostname and replace kvm1 by kvm3.

  • Reset the machine ID by running the following commands on kvm3: 
    rm -f /etc/machine-id
rm /var/lib/dbus/machine-id
dbus-uuidgen --ensure=/etc/machine-id
dbus-uuidgen --ensure
  • Clear the DHCP leased IP settings: 
    dhclient -r ens3
  • Execute command reboot on kvm3: 
    reboot
    Exit the VM console with ^] key combination.

    After the reboot, the new VM should come up with the correct host name and the MAC address.


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