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From "Avinash sridharan" <avin...@mesosphere.io>
Subject Re: Review Request 42047: Specified the CgroupsNetClsIsolatorProcess class.
Date Fri, 15 Jan 2016 18:55:40 GMT


> On Jan. 15, 2016, 6 a.m., Cong Wang wrote:
> > Why do we need netcls to regulate framework traffic on a per-container basis? Given
the fact that a) the port range based filters already work and the code (see egress fq_codel)
already exists b) we only have port range based network isolation so far.
> > 
> > I see no point of this. Please describe your use case with details, just pointing
to netcls kernel doc doesn't help at all.
> 
> Cong Wang wrote:
>     Since no one answers this, I assume no one in Mesosphere actually understands it...
So looks like you are pushing something no one is actually going to use.

The egress_fq_codel that you are pointing too (I am assuming this is the jira you are refferring
to https://issues.apache.org/jira/browse/MESOS-2422) needs port mapping isolator to enforce
QoS on any egress traffic shaping/policing, and for that matter any network policy enforcement.
 

The net_cls cgroup is a linux kernel construct that allows operators to support traffic shapping/policing
and any network policy enforcement using existing networking tools like tc and iptables. By
enabling net_cls cgroup it gives mesos a more generalized way of allowing operators to enforce
network policy irrespective of whether the task is running in the global namespace or in a
specific network namespace. In other words it will allow network policy enforcement to take
place irrespective of the type of network isolator you are using. For e.g., if someone wants
to use ip-per-container (MESOS-2044) vs the port mapping isolator, operators would still be
able to perform policy enforcement without relying on the network isolator to provide those
constructs.


- Avinash


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https://reviews.apache.org/r/42047/#review114665
-----------------------------------------------------------


On Jan. 15, 2016, 5:42 p.m., Avinash sridharan wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/42047/
> -----------------------------------------------------------
> 
> (Updated Jan. 15, 2016, 5:42 p.m.)
> 
> 
> Review request for mesos and Jie Yu.
> 
> 
> Bugs: MESOS-4262
>     https://issues.apache.org/jira/browse/MESOS-4262
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Specified the CgroupsNetClsIsolatorProcess class. This adds the ability to isolate a
mesos container using the net_cls cgroup subsystem.
> 
> 
> Diffs
> -----
> 
>   src/CMakeLists.txt 39a23df3227a4f524ea0d408dc894fa5bbab7d10 
>   src/Makefile.am 8cbfb1ba5fa49f2d3cc26ea325838a1c68a79660 
>   src/slave/containerizer/mesos/isolators/cgroups/net_cls.hpp PRE-CREATION 
>   src/slave/containerizer/mesos/isolators/cgroups/net_cls.cpp PRE-CREATION 
> 
> Diff: https://reviews.apache.org/r/42047/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Avinash sridharan
> 
>


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