6b3e805ac2
Agent only ever runs a binary whose minisign signature verifies against
the EMBEDDED public key. NATS host.cmd func 'update' {url}: download
binary + .minisig from the CDN -> verify against embedded pubkey ->
atomic swap (.old rollback) -> relaunch. URL allowlist (https + cdn.
corrosionmgmt.com only, rejects userinfo-bypass), 100MiB cap. Closes the
supply-chain hole: even a malicious CDN upload can't run unsigned.
CI: build-host-agent.yml signs every artifact with MINISIGN_SECRET_KEY
(Gitea secret) and publishes .minisig alongside; the step FAILS the
build if the secret is absent (refuses to ship unsigned). Bumped to
alpha.6.
6 deterministic tests (accept valid / reject tampered+garbage+empty sig,
URL allowlist incl userinfo-bypass, atomic swap+rollback). Fixtures
signed with the real release key so tests need no key at runtime. Full
suite 50/50 green; musl + native build clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Corrosion Host Agent
Rust rewrite of the Go companion agent (companion-agent/, retained as the
behavior reference until parity). One agent per machine supervises every game
instance on that host — Rust, Conan Exiles, Soulmask, Dune: Awakening.
- Wire protocol: see PROTOCOL.md (v2, instance-scoped subjects)
- Config: see agent.example.toml
Status — Phase 0
- Multi-instance TOML config + env overrides (
CORROSION_LICENSE_ID,CORROSION_NATS_URL,CORROSION_NATS_TOKEN) - NATS connection (infinite reconnect, capped backoff, 30s ping, offline send-buffering,
tls://support) - Host heartbeat with real telemetry (sysinfo: CPU, memory, disks) — no fabricated values
- Connectivity prober (outbound TCP, periodic + on-demand)
- Host command channel (
ping,probe,sysinfo) - Graceful shutdown (cancellation token, going-offline beacon, NATS flush)
- Phase 1a: process supervision — per-instance start/stop/restart/status over
{instance}.cmdrequest-reply, push state events on{instance}.status, crash detection with exit codes, live state in heartbeats (integration-tested with real processes + live-NATS contract test) - Phase 1b: RCON trait (WebRCON rust / TCP conan+soulmask), SteamCMD, jailed file manager
- Phase 2: Dune Docker adapter (compose lifecycle, RabbitMQ bus, Postgres admin)
- Phase 3a: SIGNED self-update — minisign-verified download+swap+relaunch (NATS
updatefunc); embedded public key; CI signs releases - Phase 3b: service install (systemd/SCM), PID adoption
Build
cargo build --release # native
cargo build --release --target x86_64-unknown-linux-gnu # linux deploy target
cargo build --release --target x86_64-pc-windows-msvc # windows (cargo-xwin on non-Windows)
Run
corrosion-host-agent --config ./agent.toml # foreground
corrosion-host-agent --config ./agent.toml check # validate config only
corrosion-host-agent version # semver + git hash + build ts