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From: "Sebastião Santos Boavida Amaro" <sebastiao.amaro@tecnico.ulisboa.pt>
To: xdp-newbies@vger.kernel.org
Subject: Using XDP in docker swarm to track outgoing traffic
Date: Tue, 06 Jul 2021 16:41:37 +0100	[thread overview]
Message-ID: <36491a913ed7da582ef3d264de1a8046@tecnico.ulisboa.pt> (raw)

Hi everyone,
I am trying to use XDP to track outgoing traffic from docker containers 
deployed using docker swarm and running in a network using the driver 
overlay. I am using a simple xdp program based on [1], and I run this 
program on the network namespace of the container using nsenter and 
attach it to its eth0.
However, I am only able to detect the incoming packets and not the 
outgoing ones. When running tcpdump on the container network namespace I 
can see both incoming and outgoing packets. So I am a bit confused as to 
why XDP would not detect the outgoing ones.
Does anyone know why the reason for this or a general idea as to why 
this might happen?

[1]https://github.com/iovisor/bcc/blob/master/examples/networking/xdp/xdp_drop_count.py

Best Regards,
Sebastião Amaro

             reply	other threads:[~2021-07-06 15:41 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-06 15:41 Sebastião Santos Boavida Amaro [this message]
2021-07-06 15:53 ` Using XDP in docker swarm to track outgoing traffic Toke Høiland-Jørgensen

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