aya VS cilium

In my last article, I briefly explained starting a project with rust-aya, including using their scaffolding generator. If you need a refresher, feel free to revisit that article or check the rust-aya documentation.

The scaffolding provided by rust-aya includes everything we need to start building our program. By specifying the program type in the command, as we did with program_type=xdp, it sets up the necessary base for that specific type of program. For more detailed information on how all this works, it's a good idea to check out the documentation on the rust-aya website.

https://github.com/aya-rs/aya is very interesting, used to power this.

Would love to see the final results of this hacking in a git repo.

Now I'm back to learning about eBPF with the help of this great book by Liz Rice. I'm using libbpf-rs and converting the book examples into Rust (except for the actual bpf programs, which are in C, I have plans of coming back and converting everything to Rust with aya). If you're interested in eBPF stuff, and want to check out it with Rust here is my repo which could be helpful (almost every piece of code is commented).

In case anyone was wondering, the link to the Aya book towards the end of this post is wrong. It points you to:

https://aya-rs.dev/

Which has almost no content other than a spartan TOC. The actual book URL is here:

https://aya-rs.dev/book/

[GitHub - aya-rs/aya: Aya is an eBPF library for the Rust programming language, built with a focus on developer experience and operability.](https://github.com/aya-rs/aya) [GitHub - kentik/convis](https://github.com/kentik/convis) [Implement an eBPF decompiler/disassembler · Issue #838 · capstone-engine/capstone · GitHub](https://github.com/capstone-engine/capstone/issues/838)

The biggest difference is that it doesn't depend on or call into libbpf (pure Rust). The interface is also intended to make it really easy to manage lots of different probes that may or may not load across several kernel versions, so you can write-once-run-anywhere. The motivations are pretty similar to aya, but with a more limited feature set and emphasis on production stability across many kernels.

Use and contribute to Aya, an open source eBPF library for Rust https://github.com/aya-rs/aya

They would have had to add a few externals to get to Graduated but it's definitely a minority:

https://github.com/cilium/cilium/blob/main/MAINTAINERS.md

Next-gen networking thanks to Cilium

Hello there, I recently have the need to proxy my pod traffic through WireGuard. I initially have my eyes on https://github.com/angelnu/pod-gateway but I just couldn't get it working. It turns out that Cilium made a CVE patch couple years ago that basically nuked ability to do inter-pod encapsulated traffic (https://github.com/cilium/cilium/issues/15991). I wonder if there is any other way that can let me do this without switching out of Cilium? Thank you guys in advance :)

I have used Cilium as CNI and installing it with helm.

I'm using the default RaspiOS Lite 64bits and as highlighted in this issue, the RaspiOS kernel does not support CONFIG_ARM64_VA_BITS_48, which makes cilium-envoy to fail building. As solution, I was told to use either Ubuntu as base OS or Traefik Ingress Controller, which is not configured in K3s.

Working on integrating cilium and loxilb as a hobby k8s project. Both are eBPF based and will be interesting to see what will be the final outcome.

Particularly in Cilium, Gateway API is very proof-of-concept. So much so that you can't even change the type of the underlying service (or anything else about the generated object) yet.

Authentication using mTLS was later merged into cilium (https://github.com/cilium/cilium/pull/24263). It uses mTLS between cilium agents to authorize flows, but do note that the mTLS auth is de-coupled from the datapath transport (i.e. you need to configure cilium to use ipsec or wireguard, as otherwise traffic won't be encrypted). As a consequence, there are some gaps in the implementation right now, like packet drops. see https://github.com/cilium/cilium/issues/23808

network plugin to be used, based on the documentation. (Project Calico ,Flannel, Cilium )