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tohojo / flent

The FLExible Network Tester.
https://flent.org
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Using network namespaces #117

Closed dtaht closed 6 years ago

dtaht commented 6 years ago

For simulation it would be helpful to be able to monitor qdiscs and other stats within a container.

ip netns exec delay tc_iterate -i delay.l 
ip netns exec delay tc_iterate -i delay.r 
ip netns exec mbox tc_iterate -i middlebox.l
ip netns exec mbox tc_iterate -i middlebox.r
tohojo commented 6 years ago

Dave Täht notifications@github.com writes:

For simulation it would be helpful to be able to monitor qdiscs and other stats within a container.

Hmm, the straight forward way to do this would be to make the 'qdisc_stats_hosts' test parameter understand namespaces, I guess? However, switch netns requires CAP_NET_ADMIN (or root), doesn't it?

flent-users commented 6 years ago

On Mon, Nov 20, 2017 at 1:31 PM, Toke Høiland-Jørgensen < notifications@github.com> wrote:

Dave Täht notifications@github.com writes:

For simulation it would be helpful to be able to monitor qdiscs and other stats within a container.

Hmm, the straight forward way to do this would be to make the 'qdisc_stats_hosts' test parameter understand namespaces, I guess?

that variable gaining a namespace%interface?

At the moment I'm also doing a ip netns exec server flent -H client into the server namespace. It's completely isolated from the rest of the network,

If I wanted to do a whole bunch of simulations at the same time, namespaces are global but ip addresses are not.

However, switch netns requires CAP_NET_ADMIN (or root), doesn't it?

To get higher than 20ms from ping you need root also.

Live a little.

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tohojo commented 6 years ago

However, switch netns requires CAP_NET_ADMIN (or root), doesn't it?

To get higher than 20ms from ping you need root also.

Live a little.

Yeah, which is why that is not supported either... :P

I really am not very keen on adding features that require root. Can't you just run an SSH server in each namespace or something? :P

dtaht commented 6 years ago

ssh will work.