I was required to auto map a USB DoK to a KVM VM (specific VM, mind you!), as a result of connecting this device to the host. I’ve looked it up on the Internet, and the closest I could get there was this link. It was almost a complete solution, but it had a few bugs, so I will re-describe the whole process, with the fixes I’ve added to the process and udev rules file. While this guide is rather old, it did solve my requirement, which was to map a specific set of devices (“known USB devices”) to the VM, and not any and every USB device (or even – USB DoK) connected to the system.
In my example, I’ve used SanDisk Corp. Ultra Fit, which its USB identifier is 0781:5583, as can be seen using ‘lsusb’ command:
[root@localhost ~]# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 020: ID 0781:5583 SanDisk Corp. Ultra Fit
My VM is called “centos7.0” in this example. I am using integrated KVM+QEMU+LIBVIRT on a generic CentOS 7.5 system.
Preparation
You will need to prepare two files:
USB definitions file (for easier config of libvirt)
UDEV rules file (which will be triggered by add/remove operation, and will call the USB definitions file)
USB Definitions file
I’ve placed it in /opt/autousb/hostdev-0781:5583.xml , and it holds the following (mind the USB device identifiers!)
I’ve created a file /etc/udev/rules.d/90-libvirt-usb.rules with the content below. Note that the device identifiers are there, but in the “remove” section they appear differently. Remove leading zero(s) and change the string. This is caused because on removal, the device does not report all its properties to the OS. Also – you cannot connect more than three (3) such devices to a VM, so when you fail to detach three devices (following a consecutive insert/remove operations, for example), you will not be able to attach a fourth time.
I have been using NextCloud for a long while now. It is a smart solution, and although I do not like its agent (I’ve had many problems with it around Hebrew file names on multiple types of operating systems, which never matured enough for a full bug description and details) – for an easy access…
This post will describe the process of placing SSH keys using the internal ‘systemshell’ command of NetApp. As always – when doing something which the vendor did not intend you to do, do it very carefully. This data was obtained from NetApp forums, and while I do not have the original post to link (I…
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I have been using NextCloud for a long while now. It is a smart solution, and although I do not like its agent (I’ve had many problems with it around Hebrew file names on multiple types of operating systems, which never matured enough for a full bug description and details) – for an easy access…
This post will describe the process of placing SSH keys using the internal ‘systemshell’ command of NetApp. As always – when doing something which the vendor did not intend you to do, do it very carefully. This data was obtained from NetApp forums, and while I do not have the original post to link (I…
I was missing some bleeding-edge packages, and while I was able to find the RPM packages, I was unable to find the repo path. So, thanks to this post, I was able to use it. This will probably break my Linux, so I will use it in a test environment first.The repo file would look…
Two days ago, calling in sick for the day, I’ve noticed my home Internet connection dropped few times. Not only that, I’ve noticed that while it dropped, my router, a Linux machine, was inaccessible. A quick verification showed that the machine just rebooted itself once a while, while other machines, located on the same power…
In my post just below, I have defined a set of tests to verify the possible cause of the tg3 problem. It had nothing to do with autoneg, and was fixed in RHEL 4 Update 4. That 32bit installer works correctly. One last thing to test – rebuild the installer initrd, and replace tg3 module…
It has been long time since I’ve written here before. I got lazy, but I have few new things to share with whoever reads this blog, and myself, for future reference. First – I’ve got a nice VGA card from a friend of mine, a nice looking TI8200 x8, which is a great upgrade comparing…
I have been using NextCloud for a long while now. It is a smart solution, and although I do not like its agent (I’ve had many problems with it around Hebrew file names on multiple types of operating systems, which never matured enough for a full bug description and details) – for an easy access…
This post will describe the process of placing SSH keys using the internal ‘systemshell’ command of NetApp. As always – when doing something which the vendor did not intend you to do, do it very carefully. This data was obtained from NetApp forums, and while I do not have the original post to link (I…
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