Prerequisite: Operating System and Software Versions
- Operating System: – Redhat 7.3
- Software: – libvirtd (libvirt) 2.0.0
Obtain Source Virtual Machine’s information
Before we begin cloning any virtual machine we first need to obtain some basic information about it. The absolute minimum information required about the source virtual machine we are about to clone would be its name and number of disk in use. To get virtual machines name run:
# virsh list
Id Name State
1 server1.local running
Next, we may would like to know the number of disk our source virtual machines is using as well as its location. The information about disks location is optional as it only provides us with a hint on where to store new clone disk files for the sake of consistency: # virsh dumpxml server1.local | grep "source file"
From the above output we can see that our original virtual machine has three disks stored in location /var/lib/libvirt/images/. Continue reading “Clone KVM-based Virtual Machines on Redhat / CentOS Linux” »
The qemu-guest-agent is a helper daemon, which is installed in the guest. It is used to exchange information between the host and guest, and to execute command in the guest.
In Proxmox VE, the qemu-guest-agent is used for mainly two things:
- To properly shutdown the guest, instead of relying on ACPI commands or windows policies
- To freeze the guest file system when making a backup (on windows, use the volume shadow copy service VSS).
You have to enable the guest-agent per VM, either set it in the GUI to “Yes” under options (see screenshot):
or via CLI:
qm set VMID --agent 1
On Linux you have to simply install the qemu-guest-agent, please refer to the documentation of your system.
We show here the commands for Debian/Ubuntu and Redhat based systems:
Continue reading “Install Qemu Guest Agent on Proxmox” »
The OVA file is nothing more than a TAR archive, containing the .OVF and .VMDK files. Easy!
Using Evergreen ILS for example:
~ $ file Evergreen_trunk_Squeeze.ova
Evergreen_trunk_Squeeze.ova: POSIX tar archive (GNU). I’ts possible to use the tar command to list the contents
~ $ tar -tf Evergreen_trunk_Squeeze.ova
Simply extract those things…
~ $ tar -xvf Evergreen_trunk_Squeeze.ova
Continue reading “Converting OVA for use with KVM / QCOW2” »
Let’s start uploading the exported ova file to the proxmox server. Extract the OVA file:
tar -xvf *.ova
This should output a couple of files from the OVA container, it should include an OVF file, which is the VM Defenition file, and a VMDK file, which is the actual hard disk image. Again, this may take a while.
Convert the vmdk to a Proxmox compatible qcow2 file:
qemu-img convert -f vmdk myvirtual-disk1.vmdk -O qcow2 qcowdisk.qcow2
We now need to get the image into a VM with some hardware so that we can begin to use it. This is where things get tricky – the OVF file is not compatible with Proxmox and needs to be manually understood. The principle here is we are going to use the Proxmox web GUI to create a VM and replace the empty disk image which is created with our recently converted qcow2 image.
You can use vi to open the OVF file and understand some of the basic settings which are required for the VM. Open the OVF file and look for the following XML tags:
Continue reading “Convert .ova and import it on Proxmox KVM virtualization” »
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo br1 eth1 br0 eth0
iface lo inet loopback
Continue reading “KVM Network Bridge configuration” »