a62715409f
Implements complete companion agent for Rust servers not on managed panels.
Features:
- NATS integration with token auth and auto-reconnect
- Game server process management (start/stop/restart/monitor)
- File operations (read/write/delete/list) via NATS
- SteamCMD integration for automated updates
- Self-update capability with download and replace
- Heartbeat publishing every 60s with server status
- Graceful shutdown handling (SIGTERM/SIGINT)
- Zombie process prevention via cmd.Wait()
- Cross-platform builds (Linux amd64, Windows amd64)
Structure:
- cmd/agent/main.go: Entry point, config, signal handling
- internal/app/daemon.go: Main loop, NATS subscriptions
- internal/client/nats.go: NATS connection with reconnect
- internal/process/gameserver.go: Process management
- internal/process/steamcmd.go: Steam update execution
- internal/files/operations.go: File system operations
- internal/update/updater.go: Self-update logic
- Makefile: Cross-compilation targets
- README.md: Installation and configuration guide
NATS Subjects:
- Publishes: corrosion.{license_id}.companion.heartbeat
- Publishes: corrosion.{license_id}.files.response
- Subscribes: corrosion.{license_id}.cmd.server
- Subscribes: corrosion.{license_id}.files.{get|put|delete|list}
- Subscribes: corrosion.{license_id}.update.steam
- Subscribes: corrosion.{license_id}.update.companion
Built binaries: 7.0MB (Linux), 7.2MB (Windows)
Total code: 1,356 LOC across 8 files
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
package main
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import (
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"context"
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"log"
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"os"
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"os/signal"
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"syscall"
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"time"
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"github.com/kelseyhightower/envconfig"
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"github.com/vigilcyber/corrosion-companion/internal/app"
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"github.com/vigilcyber/corrosion-companion/internal/client"
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)
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// Config holds all environment-based configuration
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type Config struct {
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// NATS connection
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NATSUrl string `envconfig:"NATS_URL" required:"true"`
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NATSToken string `envconfig:"NATS_TOKEN" required:"true"`
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// License identification
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LicenseID string `envconfig:"LICENSE_ID" required:"true"`
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// Game server configuration
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SteamCMDPath string `envconfig:"STEAMCMD_PATH" default:"/usr/games/steamcmd"`
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GameServerPath string `envconfig:"GAME_SERVER_PATH" required:"true"`
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GameServerArgs string `envconfig:"GAME_SERVER_ARGS" default:"-batchmode"`
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// Optional settings
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HeartbeatInterval int `envconfig:"HEARTBEAT_INTERVAL" default:"60"`
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LogLevel string `envconfig:"LOG_LEVEL" default:"info"`
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}
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const version = "1.0.0"
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func main() {
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log.SetFlags(log.LstdFlags | log.Lshortfile)
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log.Printf("Corrosion Companion Agent v%s starting...", version)
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// Load configuration from environment
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var cfg Config
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if err := envconfig.Process("", &cfg); err != nil {
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log.Fatalf("Failed to load configuration: %v", err)
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}
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log.Printf("Configuration loaded:")
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log.Printf(" NATS URL: %s", cfg.NATSUrl)
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log.Printf(" License ID: %s", cfg.LicenseID)
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log.Printf(" Game Server Path: %s", cfg.GameServerPath)
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log.Printf(" SteamCMD Path: %s", cfg.SteamCMDPath)
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log.Printf(" Heartbeat Interval: %ds", cfg.HeartbeatInterval)
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// Create context with signal handling for graceful shutdown
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ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
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defer cancel()
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// Connect to NATS
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log.Println("Connecting to NATS...")
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nc, err := client.Connect(cfg.NATSUrl, cfg.NATSToken)
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if err != nil {
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log.Fatalf("Failed to connect to NATS: %v", err)
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}
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defer nc.Close()
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log.Println("NATS connection established")
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// Initialize daemon configuration
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daemonCfg := &app.DaemonConfig{
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LicenseID: cfg.LicenseID,
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HeartbeatInterval: time.Duration(cfg.HeartbeatInterval) * time.Second,
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SteamCMDPath: cfg.SteamCMDPath,
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GameServerPath: cfg.GameServerPath,
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GameServerArgs: cfg.GameServerArgs,
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Version: version,
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}
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// Start daemon
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daemon, err := app.NewDaemon(nc, daemonCfg)
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if err != nil {
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log.Fatalf("Failed to initialize daemon: %v", err)
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}
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log.Println("Daemon initialized, starting main loop...")
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// Run daemon until context is cancelled
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if err := daemon.Run(ctx); err != nil {
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log.Fatalf("Daemon error: %v", err)
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}
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log.Println("Companion agent shutdown complete")
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}
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