How do you get a VM to simulate a real computer?

[offei]

My software needs to run on a real computer, how to let VM can be fully simulated into a real computer, so that the outside world can not be detected is a virtual machine?

 

[Moayad]

Hi,

See this thread

 

[offei]

I am using Ubuntu 20.04, how will I modify it? It's a mess. Can you sum it up?

 

[Moayad]

Hi,

You have to edit the `/etc/pve/qemu-server/VMID.conf` and set the args as mentioned in the above post thread from the Proxmox VE side.

 

[offei]

boot: order=scsi0;ide2;net0
cores: 28
cpu: host
ide2: local:iso/ubuntu-20.04.5-live-server-amd64.iso,media=cdrom,size=1373568K
memory: 32768
meta: creation-qemu=7.1.0,ctime=1675764010
name: 1
net0: virtio=069:C6:52:41:BB,bridge=vmbr0,firewall=1
numa: 0
ostype: l26
scsi0: local:100/base-100-disk-0.qcow2,iothread=1,size=1250G
scsihw: virtio-scsi-single
smbios1: uuid=b3a0620c-51fd-4c4b-80e7-511424ceb728
sockets: 2
template: 1
vmgenid: af6bc46f-013a-4742-9c24-17ee82eff781

What do I need to change?

 

[offei]

I do not have too high technical level, can you give me a detailed method?

 

[Moayad]

The VM config should be as below:

boot: order=scsi0;ide2;net0
args: -cpu host,-hypervisor,kvm=off
cores: 28
cpu: host
ide2: local:iso/ubuntu-20.04.5-live-server-amd64.iso,media=cdrom,size=1373568K
memory: 32768
meta: creation-qemu=7.1.0,ctime=1675764010
name: 1
net0: virtio=06:D9:C6:52:41:BB,bridge=vmbr0,firewall=1
numa: 0
ostype: l26
scsi0: local:100/base-100-disk-0.qcow2,iothread=1,size=1250G
scsihw: virtio-scsi-single
smbios1: uuid=b3a0620c-51fd-4c4b-80e7-511424ceb728
sockets: 2
template: 1
vmgenid: af6bc46f-013a-4742-9c24-17ee82eff781

Added this `args: -cpu host,-hypervisor,kvm=off` line

Make sure to stop and start the VM again. In order to see if the adding the `args` line take the effect, you can run the below bash script in the ubuntu VM and this will print yes or no.

#!/bin/bash

echo -n "Is this a virtual machine? ..... "

hypervisorflag=$(grep flags /proc/cpuinfo 2>/dev/null | grep hypervisor)
if [ "$(command -v systemd-detect-virt 2>/dev/null)" ]; then
    detectedvirt=$(systemd-detect-virt)
    if [ "$hypervisorflag" ]; then printf "Yes ($detectedvirt)\n"; else printf "No\n"; fi
else
    if [ "$hypervisorflag" ]; then printf "Yes\n"; else printf "No\n"; fi
fi

 

[offei]

The virtual machine can not boot when the above settings are completed

 

[Moayad]

Make sure on the Boot order, you can see by going to Proxmox VE Web UI -> Datacenter -> [NodeName] -> [VMID] -> Options -> Boot Order

 

[offei]

You have to correct the Boot Order after changning to the LSI Controler an reselt SATA Devices under the options.
Do I need to change the SCSI controller?

 

[Moayad]

Your VM is already using the SCSI, so just you have to edit the args flag in the VM config.

scsihw: virtio-scsi-single

 

[offei]

Now that I've returned the value"No," does that mean my machine is already a physical computer? Do I need to change those“Bios vendor strings” or other information?
It is said that my software supplier is very strict in testing

 

[offei]

Do I still need to change the network card settings? Like switching to Intel 1000?

 

[Moayad]

Now that I've returned the value"No," does that mean my machine is already a physical computer?

Yes.

Do I need to change those“Bios vendor strings” or other information?

If the bash script returns NO, you do not need to change anything else.