[Users] sysctl -w

[Peter Sabaini]

On 30.10.13 16:21, Kir Kolyshkin wrote:
> On 10/30/2013 07:34 AM, Peter Sabaini wrote:
>> Hey all,
>>
>> I've read somewhere that with OpenVZ kernel > 2.6.32-042stab072.10 it
>> should be possible to set sysctl from within the VE
>>
>> However:
>>
>> # sysctl -w fs.file-max=10000
>> error: permission denied on key 'fs.file-max'
>> # uname -a
>> Linux xxx 2.6.32-042stab081.5 #1 SMP Wed Oct 23 16:32:28 MSK 2013
>> x86_64 x86_64 x86_64 GNU/Linux
>
> You have to change this on the host system (i.e. hardware node).
> For container, this is limited by numfile UBC (http://openvz.org/numfile)

Yeah...

Maybe I should elaborate on my usecase: I'm testing my Salt 
(http://saltstack.com/) configuration (which ultimately deploys to 
metal) inside OpenVZ.

Works great, I especially appreciate the fact that a new VE can be 
quickly built/restarted and I can have a simulation of a whole cluster 
in a VMware box thanks to the low overhead of VEs.

However, sometimes I would like to do low-level config via Salt as well, 
and up to now I've relied on ugly hacks to make Salt think that # sysctl 
-p etc. have actually succeeded and I was wondering if that was still 
necessary.

So from what you're saying I gather that that hasn't changed and I can't 
write kernel sysctls from VE, right?

Thanks,
peter.


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