Posts tagged qm

proxmox usb passthrough to VM
posted on 2016-08-17 09:35

This works while the VM is already running, no reboot needed.

Plug the USB device into your hypervisor.

lsusb to see if it's there:

root@server:~# lsusb
Bus 002 Device 002: ID 8087:8002 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:800a Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 0557:2419 ATEN International Co., Ltd 
Bus 003 Device 002: ID 0557:7000 ATEN International Co., Ltd Hub
Bus 003 Device 004: ID 1058:25a2 Western Digital Technologies, Inc. 
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Here the Identifier is 1058:25a2.

Now qm list to discern your vm's id.

root@server:~# qm list
      VMID NAME                 STATUS     MEM(MB)    BOOTDISK(GB) PID       
     10280 vm_01                running    25600           5580.00 482591    
     10281 vm_02                running    6144             500.00 764248

Enter console via qm monitor <vmid>:

root@server:~# qm monitor 10280
Entering Qemu Monitor for VM 10280 - type 'help' for help

There do info usbhost:

qm> info usbhost
  Bus 3, Addr 3, Port 12.1, Speed 1.5 Mb/s
    Class 00: USB device 0557:2419
  Bus 3, Addr 4, Port 1, Speed 480 Mb/s
    Class 00: USB device 1058:25a2, Elements 25A2

Via the device identifier we know its bus 3 and port 1. Now attach it to the virtual machine:

qm> device_add usb-host,hostbus=3,hostport=1

lsblk from within the VM shows me the plugged in harddisk.

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