Aurelia

An embeddable service mesh for Rust applications.

Aurelia gives Rust services a built-in, secure, peer-to-peer fabric — no sidecar, no control plane, no extra runtime to deploy. You add it as a crate, your application gets authenticated mesh networking.

Status: early preview. The public API may change before 1.0.

Why Aurelia

Most service-mesh tooling assumes Kubernetes, sidecars, and an operator team. That is overkill for a great many Rust applications — embedded fleets, edge devices, internal control planes, peer-to-peer tools, and single-binary services that still need to talk to each other safely.

Aurelia takes the opposite approach:

Embedded. Ships as a Rust crate. No sidecar, no daemon, no extra process to supervise.
Secure by default. mTLS over TCP and authenticated Unix-socket transport. Peer identity is verified before any application traffic flows.
Async, with timeouts everywhere. All operations are asynchronous and bounded; nothing in the hot path can hang silently.
Layered and replaceable. A clean A0 (transport auth) / A1 (messaging) / A2 (services) / A3 (your app) split lets you adopt only what you need.

What you get today

The current preview ships the foundations:

Authenticated transports. mTLS over TCP and authenticated Unix sockets, with handshake completion before any application frames.
Peering layer (A1). Message and blob transfer, peer addressing, connection lifecycle, a pluggable route resolver, and a simple in-memory resolver for explicit topologies.
Single error model. One AureliaError type across the stack, with stable error IDs — no per-crate error zoos to translate between.
A thin, owned runtime. Aurelia owns its Tokio runtime so your application does not have to think about it.

Higher-level A2 service capabilities (discovery, RPC, etc.) are on the roadmap and will land on top of the same A1 fabric.

Quick look

use std::sync::Arc;
use aurelia::{Aurelia, DomusConfig, DomusAddr, DomusAuthConfig, SimpleResolver};

let aurelia = Aurelia::new();

let domus = aurelia
    .domus_builder(
        DomusConfig::default(),
        DomusAddr::from("local"),
        DomusAuthConfig::pkcs8_pem(/* ... */),
        Arc::new(SimpleResolver::default()),
    )
    .build()
    .await?;

See docs.rs/aurelia for the full API.

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