[lxc-devel] (no subject)

[Jeff Liu]

Hi Daniel,

On 02/16/2012 06:52 AM, Daniel Lezcano wrote:

> On 02/12/2012 03:55 PM, Jeff Liu wrote:
>> Hi xiaojun,
>>
>> On 02/12/2012 05:27 PM, MaoXiaoyun wrote:
>>
>>> Hi:
>>>
>>>      I search the lxc-devel and find there has been some
>>> disscussiones on
>>> the requirement of container's quota
>>> since 2009. For example, under my scenario,  I first make hole rootfs
>>> read only , and then mount some writable dir, such
>>> as /var/ /tmp and some other dirs for a container, and I want to
>>> limit the quota of this directories, such as 20G.
>>> But it looks like this is not support yet, right? If so, is there a
>>> workaround way to fill my requirement?
>> Looks there is no such feature in LXC userland tools for now, or am I
>> missing something?
>> Maybe you can write an RFC in detail to list.
>>
>> Dear LXC developer,
>>
>> I(from Oracle kernel team) just started a research regarding this kind
>> of features.
>> In short, something includes:
>> 1) Task resource limits (like prlimit64(2)) for container, let LXC
>> userland tools/kernel support the maximum open file descriptors, etc..
>> if possible.
> 
> I am not sure but I think this is supported as part of the "user
> namespace" but this one is still experimental and not used in LXC for
> now. If you are willing to test it, you should just add the
> CLONE_NEW_USER in src/lxc/start.c, in the lxc_spawn function clones_flags.

I will try it out.

> 
>> 2) Quota support(the max size of file/directory).
>>
>> I'd like to know if anyone has already been working on them?  or does
>> them sounds make sense?
> 
> Yes, I remember someone worked on it but had to give up because of a new
> job.
> 
> http://article.gmane.org/gmane.linux.kernel/797938/match=
> 
> and
> 
> http://comments.gmane.org/gmane.linux.kernel.containers/13870
> 
> where there are some hints to create a configuration to have quota per
> container.

Thanks for pointing those out! It could save a lot work from scratch.

Cheers,
-Jeff

> 
> Thanks
>   -- Daniel