[lxc-devel] limit the netwok traffic of container from the host

[Serge Hallyn]

Quoting lsmushroom (lsmushroom at 126.com):
> Sorry for the late response. For your question , you could not limit
> the network traffic in that way. Because TC will only limit the

But it worked for me...

Are you saying it will limit only traffic to, but not from, the
container?

> traffic send out from the target device .  And for the device of veth
> type , the device on the host end will “send out” the traffic to the
> container , and  it will “receive”  the traffic come from the
> container . Thus , you have to go into the  container to run your
> command , and that is not what we want.  So I’ve added a new option
> “peer” to support running the command on the host. And for your
> command , it may run like this (on the host) :
> 
> sudo tc qdisc add dev peer xxx root tbf rate 0.5mbit burst 5kb latency 70ms peakrate 1mbit minburst 1540
> 
>          Which will take effective on the peer end of the xxx. In this way , we may control the network traffic of the container from the host end .
> 
> At 2013-06-15 05:27:01,"Serge Hallyn" <serge.hallyn at ubuntu.com> wrote:
> >Quoting lsmushroom (lsmushroom at 126.com):
> >> Hi All,
> >>       Recently , we have been trying to find out a suitable way to
> >>       limit  network traffic generated from the process running in the
> >>       container. The network  type we used for our container is veth.
> >>       And we have tried TC combined with cgroup net_cls subsystem ,
> >>       which has successfully fulfill our goal . However ,  it requires
> >>       to add the configurations inside the container. As we will
> >>       provide the container as a service, and it is obviously
> >>       unacceptable to allow the end user modify the bandwidth
> >>       allocation . 
> >
> >If I just set the veth pair name to xxx and issue:
> >
> >sudo tc qdisc add dev xxx root tbf rate 0.5mbit burst 5kb latency 70ms peakrate 1mbit minburst 1540
> >
> >on the host, the container's network is rated limited.
> >
> >Do you want something different?