Hello,

I have two redundant servers with qemu-kvm type 1 hypervisor, each server houses three Redhat linux5 VMs.
The problem that arises is that I want to restore a lost VM.
Normally the system contains a global backup of all the server configuration with which we can recover this VM.

Thanks

Not sure what way to go here.

You shouldn't have "lost" a vm would be my starting point.

If you have a virtual hard drive copy then move it??

How did you lose it?
I am not aware of such a backup. If the VM's configuration exists, it is not lost. Can you elaborate?

Most people use libvirt to manage KVM VMs. Is that what you do? How do you start and stop them, and how do you know one of them was lost?

Hello;

From the Virtual-Machine-Manager, I tried to make a clone of this VM machine in running state.
Also I found that the .xml file does not exist et le ping ne marche plus.

Pour votre information cette VM est responsable de la gestion d'une application de supervision graphique d'un réseau de système Telecom.

Thanks

Hello;

From the Virtual-Machine-Manager, I tried to make a clone of this VM machine in running state.
Also I found that the .xml file does not exist et le ping ne marche plus.

For your information, this VM is responsible for managing a graphical supervision application for a Telecom system network.

Thanks[/QUOTE]

What happened when you tried cloning it?
ping not getting a response can have other causes: The VM is stopped, something is broken at the network level, or networking or firewall are not correctly configured in the VM.

Where did you look for the XML file? If you can access the command line, share the result of virsh list --all. Is the lost VM in that list? If yes, it is not lost.

You can also search the host's filesystem for the file that contains the VM's root disk, for example find / -name \*.qcow2.

If you find neither XML file nor the root disk, the VM is indeed lost. If you haven't created a backup, there is no backup.

I think you had this problem early this year. Is it the same VM or a different one?

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Hello

Yes this is the same problem.

When i tried cloning it, i lost it and this problem appears.

Also after using virsh list -all commande i didn't find my VM.

And cd /var/lib/libvirt/qemu didn't contain the .xml file for this VM.

Thanks

On my hypervisor host, XML files are under /etc/libvirt. But perhaps it's elsewhere in your case. I would search the entire filesystem, just in case.

And I am sorry to say it again, if the XML file is not on that host, it's gone. There is no built-in backup. Backups are set up by system administrators.

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Hello



you are right i was wrong xml file it is in / etc / libvirt.

How could I check if there is a backup which has been made somewhere of the VM or of all the configuration of my linux servers.

Thank you

You ask the system administrators.

EDIT: Backups are usually done on a regular basis, so if your system is backed up, you should find something in the cron tables or anacron configuration.

1 members found this post helpful.

OK Thank you for reply

Hello

just one last question.
We have another server from another system which hosts the same VM and which performs the same role.
Can we backup this VM and use it in our server instead of the lost one, and how can we do it?

Thanks

Hello

I want to make a backup and copy a VM from one server to another.?????

Thanks

Shut the VM down. Copy its root disk to the new host. Copy its XML file as well.

Remove things like MAC address and UUID from the XML file, which uniquely identify the VM. Then create a new VM from the XML file.

Depending on your situation, you may also have to fix the network configuration in the VM copy. I can't say if your application requires some adjustment.

Hello

How can do it ? ( Copy its root disk to the new host. Copy its XML file as well )

Remove only UUID but change the MAC ADDR with a new MAC, is it right ?

Thanks