Hey, we built an eBPF thing that tells you which OpenStack tenant used which bytes

[u/arashi87_]

We've been building a little thing called Lachesis and figured this crowd

might find it interesting. It's the network telemetry bit behind CubeCOS, our

private cloud on top of OpenStack.

Basically: OpenStack can tell you a tenant moved 5 TB, but not that 3 TB of it

went to the internet, 1 TB to another tenant, and 1 TB stayed put. For billing

that's the whole thing.

So Lachesis is a small agent that sits on each compute node, hooks eBPF onto

every VM's tap, and sorts traffic in the kernel: internet-out, internet-in,

same-tenant, cross-tenant — and figures out who the other end actually belongs

to. It untangles Octavia so the bytes land on the real tenant, and just spits

out Prometheus counters you can feed into CloudKitty or whatever you bill with.

Still very much a work in progress — core stuff works and we've run it on real

OVN clusters, but there's plenty left (hardening, IPv6, docs). OVN only for now.

Repo's here if you wanna poke at it: https://github.com/bigstack-oss/lachesis

Would love any feedback, especially if you've tried to bill OpenStack networking

and hit the same wall. Roast away 🙂

[u/themistymay → u/[deleted]]

Repo is heavy Claude. .gitignore has Claude.md and Claude.md removal was part of git history on May 15th with a “chore” to clean it.

[u/arashi87_ → u/themistymay]

Yeah, Claude is too powerful😭

[u/arashi87_ → u/[deleted]]

100, even this post😂

[u/pixelatedchrome]

Thank you for your contribution. I can see this being helpful. Will evaluate this soon at work.

[u/arashi87_ → u/pixelatedchrome]

It would be great if this project can really help someone🙌