57858a1e1c
For Saturday's Ubuntu host + Linux VM: 'corrosion-host-agent install' writes a systemd unit (Type=simple — the agent already handles SIGTERM cleanly), daemon-reloads, and enables+starts the service; 'uninstall' reverses it. - new service.rs: pure unit_file_contents() generator (unit-tested) + Linux install/uninstall via systemctl; non-Linux returns a clear 'Linux only' error (Windows SCM is the follow-up). - ExecStart honors the resolved --config path (default or explicit). - Runs as root: the agent supervises game processes + their files, needs broad filesystem access. cargo check + service unit test green. Tag agent-v2.0.0-alpha.11 -> CI signs -> CDN /host-agent/alpha/. Co-Authored-By: Claude Opus 4.8 <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 done (
docker compose up -d/stop/restartvia theSupervisortrait +DockerComposeSupervisor); RabbitMQ admin bus + Postgres admin surface deferred. Container crash-detection + state adoption on agent restart land with Phase 3b. - 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