Network
Keep appetite for the stats, it costs nothing
Presentation of the statistics consumption model in VPP from the costless low-level design to their exploitation in userspace
February 6, 2022
2:20 PM – 2:40 PM Add to calendar
2:20 PM – 2:40 PM Add to calendar
D.network
<p><a href="https://fd.io/">VPP (aka Vector Packet Processing)</a> is a fast network stack running in Linux userspace.
It is designed to handle packets with high performance, which makes gathering statistics efficiently a must have.</p>
<p>The model that has been chosen in <a href="https://fd.io/">VPP</a> to provide up to date statistics is built upon shared memory and optimistic locking.
The counters are updated in this shared memory at a rather low cost by the data plane and can be read out at almost any time by all the consumers.
We will first describe this model in more details.</p>
<p>The consumption of these stats may take various forms depending on the use case and the application needs.
That's why we have developed different high-level components to access them:</p>
<p>1) A filesystem in userspace: thanks to <a href="https://github.com/hanwen/go-fuse">go-fuse</a>, we can mount a filesystem ordering statistics in folders and files, in a similar fashion to '/proc' in Linux</p>
<p>2) A <a href="https://prometheus.io/">Prometheus</a> agent: applied to <a href="https://github.com/calico-vpp">Calico/VPP</a>, a new dataplane for <a href="https://www.tigera.io/project-calico/">Calico</a> - the popular cloud native <a href="https://kubernetes.io/">Kubernetes</a> network plugin - based on <a href="https://fd.io/">VPP</a>. Prometheus is integrated as a monitoring tool in order to export our statistics in the form of real-time metrics collected from targets. Metrics come from our pod interfaces statistics, and targets are <a href="https://github.com/calico-vpp">Calico/VPP</a> agents running on our <a href="https://kubernetes.io/">Kubernetes</a> cluster nodes.</p>
<p>During the presentation, you will have a quick demo of these components.</p>
Additional information
| Type | devroom |
|---|
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