By grahamweb
I’ve been testing network performance using iperf3 between pods on our DigitalOcean Kubernetes cluster, to try and aid in debugging issues we have seen around database throughput.
When testing with hostNetwork: true on the pods, I see an average bitrate of around 1.9GBits/sec between the node IPs. When using the kubernetes network, via Cilium, I only see around 600MBits/sec between the pod IPs.
From reading articles such as on Cilium’s blog I got the impression that the performance disparity should not be anywhere near as much. What is Cilium even actually doing here? :-)
I’m using the docker image mlabbe/iperf3 deployed as a DaemonSet, with the command iperf3 -c <ip address> -t 100
Kubernetes v1.15.5 - tried on two different DigitalOcean clusters with very similar results.
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
Become a contributor for community
Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.
DigitalOcean Documentation
Full documentation for every DigitalOcean product.
Resources for startups and AI-native businesses
The Wave has everything you need to know about building a business, from raising funding to marketing your product.
The developer cloud
Scale up as you grow — whether you're running one virtual machine or ten thousand.
Start building today
From GPU-powered inference and Kubernetes to managed databases and storage, get everything you need to build, scale, and deploy intelligent applications.
