prefork manages child processes to make use of the OS REUSEPORT feature. It delegates to fasthttp's prefork package to avoid duplicating process management logic.
(addr string, tlsConfig *tls.Config, cfg *ListenConfig)
| 28 | // prefork manages child processes to make use of the OS REUSEPORT feature. |
| 29 | // It delegates to fasthttp's prefork package to avoid duplicating process management logic. |
| 30 | func (app *App) prefork(addr string, tlsConfig *tls.Config, cfg *ListenConfig) error { |
| 31 | if cfg == nil { |
| 32 | cfg = &ListenConfig{} |
| 33 | } |
| 34 | |
| 35 | // Determine RecoverThreshold |
| 36 | recoverThreshold := cfg.PreforkRecoverThreshold |
| 37 | if recoverThreshold == 0 { |
| 38 | recoverThreshold = max(1, runtime.GOMAXPROCS(0)/2) |
| 39 | } |
| 40 | |
| 41 | // Use configured logger or default to Fiber's log package |
| 42 | var logger prefork.Logger |
| 43 | if cfg.PreforkLogger != nil { |
| 44 | logger = cfg.PreforkLogger |
| 45 | } else { |
| 46 | logger = preforkLogger{} |
| 47 | } |
| 48 | |
| 49 | p := &prefork.Prefork{ |
| 50 | Network: cfg.ListenerNetwork, |
| 51 | Reuseport: true, |
| 52 | RecoverThreshold: recoverThreshold, |
| 53 | RecoverInterval: cfg.PreforkRecoverInterval, |
| 54 | ShutdownGracePeriod: cfg.PreforkShutdownGracePeriod, |
| 55 | Logger: logger, |
| 56 | OnMasterDeath: func() { os.Exit(1) }, //nolint:revive // Exiting child process is intentional |
| 57 | } |
| 58 | |
| 59 | // Use test command producer if in test mode |
| 60 | if testPreforkMaster { |
| 61 | p.CommandProducer = func(_ []*os.File) (*exec.Cmd, error) { |
| 62 | cmd := dummyCmd() |
| 63 | cmd.Stdout = os.Stdout |
| 64 | cmd.Stderr = os.Stderr |
| 65 | if err := cmd.Start(); err != nil { |
| 66 | return cmd, fmt.Errorf("prefork: failed to start test command: %w", err) |
| 67 | } |
| 68 | return cmd, nil |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | // Child process: serve function wraps TLS, starts up process, etc. |
| 73 | p.ServeFunc = func(ln net.Listener) error { |
| 74 | // wrap a tls config around the listener if provided |
| 75 | if tlsConfig != nil { |
| 76 | ln = tls.NewListener(ln, tlsConfig) |
| 77 | } |
| 78 | |
| 79 | // prepare the server for the start |
| 80 | app.startupProcess() |
| 81 | |
| 82 | if cfg.ListenerAddrFunc != nil { |
| 83 | cfg.ListenerAddrFunc(ln.Addr()) |
| 84 | } |
| 85 | |
| 86 | // listen for incoming connections |
| 87 | return app.server.Serve(ln) |