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Hi Charles,<br>
<br>
OpenVZ does support passthrough to varying success rates depending
on what you're doing (but I have yet to really find anything it
doesn't work well with). <br>
<br>
From the hardware node, you would run:<br>
<br>
"# vzctl set 1000 --devnodes device:rw --save"<br>
<br>
(where '1000' is your container id and 'device' is the device you
want to passthrough in /dev/. In the above example you would be
sharing the host node's /dev/device device. )<br>
<br>
Next, make sure that if a certain user beyond root needs access to
this device that you set it up on the node and in the container:<br>
<br>
vzctl exec 1000 chown -R user:group /dev/device<br>
vzctl exec 1000 <big><big><span class="Apple-style-span"
style="border-collapse: separate; color: rgb(0, 0, 0);
font-family: 'Times New Roman'; font-style: normal;
font-variant: normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: 2; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; font-size: medium;"><span
class="Apple-style-span" style="font-family:
verdana,geneva,lucida,'lucida
grande',arial,helvetica,sans-serif; font-size: 13px;">chown
-R user:group /lib/udev/devices/device<br>
adduser user<br>
chown -R user:group /dev/device<br>
</span></span></big></big><br>
<br>
So, summing it all up and giving an example, let's say you want to
share the fictitional hardware device /dev/fake1 with container 1000
and in the container you need to make it accessible by the user and
group "fake user". The following are the commands you would use to
do so:<br>
<br>
------<br>
# create the passthrough<br>
vzctl set 1000 --devnode fake1:rw --save<br>
<br>
# assign permissions<br>
vzctl exec 1000 chown -R fake1:fake1 /dev/fake1<br>
vzctl exec 1000 chown -R fake1:fake1 /lib/udev/devices/fake1<br>
<br>
# add user on node so permissions stick through pam<br>
adduser fake1<br>
chown -R fake1:fake1 /dev/fake1<br>
------<br>
<br>
After performing the above from the hardware node the container is
hosted on, you should now have a /dev/fake1 inside container 1000
with the correct permissions.<br>
<br>
<br>
<br>
Hope that helps,<br>
<br>
John Knight<br>
Aretta Communications<br>
<br>
<br>
On 11/21/2010 11:00 PM, Charles N Wyble wrote:
<blockquote cite="mid:4CE9EAF5.8060709@knownelement.com" type="cite">Hello,
<br>
<br>
I've been happily using openvz and proxmox (with only openvz
guests) for some time now. Thank you very much for the fantastic
work!
<br>
<br>
I have a desire to pass through some PCI and USB devices to a USB
guest. Is this possible? I read the man page for vzctl and saw
<br>
<br>
--devnodes device:[r][w][q]|none
<br>
Give the container an access (r - read, w -
write, q - disk quota management, none - no access) to a device
designated by the special file /dev/device. Device file is created
in a container by vzctl. Example: vzctl set 777 --devnodes
sdb:rwq.
<br>
<br>
<br>
but this seemed oriented towards disk drives. I'm not sure how to
reference a PCI or USB device.
<br>
<br>
Searching around the net, I saw that KVM seems to support USB/PCI
passthrough. Does OpenVZ (or I should say proxmox with kernel
<br>
Linux knel-prod-proxmox2 2.6.32-4-pve #1 SMP Thu Oct 21 09:35:29
CEST 2010 x86_64 GNU/Linux) support arbitrary device pass through?
<br>
<br>
Thanks!
<br>
<br>
Please let me know if any additional information is required.
<br>
<br>
<br>
<br>
<br>
--
<br>
Charles N Wyble
<br>
(818)280-7059 <a class="moz-txt-link-abbreviated" href="mailto:charles@knownelement.com">charles@knownelement.com</a>
<br>
President & CEO Known Element Enterprises
<br>
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