Personal achievements

Contributions and personal projects published outside of coursework, in open source and professional projects.

gRPC health check for Traefik Proxy v3

Contribution merged into Traefik Proxy v3 (pull request #8583): the implementation of the gRPC health checking protocol, mentioned in the official v3 announcement and praised as "a one-liner that will change the lives of many".

Until then, Traefik could only probe the health of a gRPC backend with a plain TCP check: the connection succeeded even if the service was failing. This feature lets the proxy query the standard grpc.health.v1.Health service and route traffic based on the status actually reported by the gRPC server — an increasingly central need as gRPC (bidirectional streaming, flow control, cancellation) spreads through cloud-native environments.

nftables resource for InSpec

Contribution to InSpec, Chef's infrastructure-as-code compliance testing tool (merged in May 2023, pull request #6499): a new nftables resource to audit a nftables firewall configuration — the netfilter project meant to replace the iptables/ip6tables/arptables/ebtables frameworks.

The resource makes it possible to check, from compliance profiles, chain attributes (type, hook, prio, policy), rule presence in a chain, named set attributes (type, flags, size) and element presence in a set. It queries nft adapting to the installed version rather than the distribution, and ships with unit tests, fixtures and the official resource documentation.

openvpn-auth-okta

An authentication plugin for OpenVPN Community Edition, developed at Algolia, that validates VPN users directly against the Okta Authentication API — including two-factor authentication (TOTP via a 6-digit code appended to the password, or Push notification).

Two-component architecture sharing the same validation library: a C plugin (openvpn-plugin-auth-okta.so) and a Go binary (okta-auth-validator). Two OpenVPN integration modes are offered: the deferred shared-object plugin (recommended — credentials never travel through process environments or hit disk) or the script mode via auth-user-pass-verify. Client SSL certificates are required by default, and prebuilt packages cover the main distributions (Debian, Ubuntu, CentOS, Fedora, openSUSE, Raspbian…) on amd64, arm64, armv7l and ppc64le. Licensed under MPL-2.0, with about 97% test coverage.

vagrant-uml

A Vagrant plugin (Ruby, MIT license) developed at Algolia that adds a User Mode Linux provider to Vagrant: machines are started, halted and reached over SSH with the usual Vagrant commands (vagrant up --provider uml).

Unlike VirtualBox or VMware, UML runs a full Linux kernel as an ordinary userspace process, with no hypervisor — ideal for lightweight, scriptable development environments. A UML "box" bundles the runnable kernel, the root filesystem image and a metadata.json describing the provider, the kernel version and its features. The plugin also handles networking through iptables and relies on uml-utilities and mtools. The repository was archived (read-only) in December 2021.

ipset — kernel 2.6.22/2.6.23 compatibility

Contribution to the ipset project from the netfilter world: ipset provides kernel data structures (bitmaps, hashes, trees) that group IP addresses, networks, ports or MAC addresses, which iptables can filter efficiently through the set match and SET target — far faster than long chains of individual rules.

The compatibility fixes for Linux kernels 2.6.22 and 2.6.23, credited to "Jeremy Jacque" in the 2.3.0 changelog, kept the kernel module working in the face of the kernel's internal API changes — routine maintenance work for this kind of out-of-tree module.