Re: Default permissions on /dev/kvm

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On 03/14/2017 05:15 PM, Daniel J Walsh wrote:
> 
> 
> On 03/14/2017 05:02 PM, Dusty Mabe wrote:
>>
>> On 03/14/2017 04:56 PM, Daniel J Walsh wrote:
>>>
>>> On 03/14/2017 04:29 PM, Daniel P. Berrange wrote:
>>> I guess if you volume/bind mount the device into the container you could
>>> see an issue,
>>> but most containers that deal with /dev/kvm are going to be run as root,
>>> anyways.
>> I was running with --privileged, still got permission denied until I
>> changed permissions of /dev/kvm to 666.
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> 
> # docker run -ti --device /dev/kvm fedora ls -lZ /dev/kvm
> crw-rw-rw-. 1 root 36 system_u:object_r:container_file_t:s0:c303,c737 10, 232 Mar 14 21:12 /dev/kvm
> # chmod 600 /dev/kvm 
> # docker run -ti --device /dev/kvm fedora ls -lZ /dev/kvm 
> crw-------. 1 root 36 system_u:object_r:container_file_t:s0:c281,c442 10, 232 Mar 14 21:13 /dev/kvm
> 
> So using --device to add the device to the container just maintains the permission of the host
> for the device you added.  Whether it is volume mounted in or specified via --device, at least
> from dockers point of view. 

I'm not sure of your point. I was just trying to say that whether i
was root or not did not seem to matter. I still got permission denied
if perms were 600 and not 666. I'm working off of memory here, so it's
possible somebody will prove me wrong.

Dusty
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