Can Proxmox be run on a KVM with nested virtualization?

k9banger02

If I get a KVM with nested virt can proxmox be used to create and managed the nested VMs?

RapToN

Yes it could

Without nested virt it should also be possible to use proxmox with lxc instead of kvm, but with nested it works like on a dedicated System.

k9banger02

@RapToN said:
Yes it could

Without nested virt it should also be possible to use proxmox with lxc instead of kvm, but with nested it works like on a dedicated System.

How does LXC differ from KVM?

Neoon

Yes, performance is close to host, stable too.

Saahib

@k9banger02 said:

@RapToN said:
Yes it could

Without nested virt it should also be possible to use proxmox with lxc instead of kvm, but with nested it works like on a dedicated System.

How does LXC differ from KVM?

There are literally tonnes of articles online for that but still, in layman language :

• KVM Kernel-based Virtual Machine) is a hypervisor built into the Linux core. KVM is a virtualization technology similar to what is offered by VirtualBox or VMWare. The hypervisor emulates all the material. Thus, the operating system believes it is running on a physical machine. It is, therefore, possible to install an operating system without alteration.
• LXC (Linux Containers) is another virtualization technology that is also integrated into the Linux core. However, it uses isolation to separate the performance of each machine. Compared to KVM, the hardware is not emulated; the host system shares it. Thus, each Virtual Machine uses the same core. It would therefore be impossible to install MS Windows in an LXC container. LXC is a virtualization technology similar to what is offered by OpenVZ and Docker.

PulsedMedia

Can you nest a kvm with proxmox, on the nested kvm, on the kvm?

That would be kinda ... Funny

ehab

@PulsedMedia said:
Can you nest a kvm with proxmox, on the nested kvm, on the kvm?

That would be kinda ... Funny

would you like some tea instead ?

trungkien

I run a PBS (Proxmox backup server) on a vm, which is setup under another proxmox.
Works fine for storing backup for a bunch of proxmox servers.
But I would not run anything heavy on proxmox in a vm

PulsedMedia

@ehab said:

@PulsedMedia said:
Can you nest a kvm with proxmox, on the nested kvm, on the kvm?

That would be kinda ... Funny

would you like some tea instead ?

Thanks

rm_

@trungkien said: I run a PBS (Proxmox backup server) on a vm, which is setup under another proxmox.

It is Proxmoxes all the way down.

Maounique

LXC/D is a mature technology and things like passing various devices to the container from the host work pretty well and I must say I prefer this method rather than KVM passthrough.
Of course, YMMV but, for most usage cases where linux is involved, I found LXC to be sufficient and fast.

stoned

Proxmox needs it's own kernel so you can't use it in an LXC container, but inside a KVM or QEMU or Vbox or VMWARE machine with nested virt it will run fine. Even without nested virt, it will work as an LXC container manager inside a virtual machine.

I use PVE inside virtualbox at home and it's fine. Then PVE runs containers and other VMs and they're fine too.

Maounique

@stoned said: Proxmox needs it's own kernel so you can't use it in an LXC container

That is not what i meant, the idea is that you can run proxmox in a vm even without nested virtualization as containers don't need it.
Well, even VMs don't need if you run qemu without virt support enabled, but that is torture for everyone :P