func DaemonConfig() *badoo_config.ServiceConfigDaemonConfigT {
return config.GetDaemonConfig()
}
func Initialize(default_config_path string, service_conf Config) {
flag.StringVar(&flags.ConfFile, "c", default_config_path, "path to config file")
flag.StringVar(&flags.LogFile, "l", "", "path to log file, special value '-' means 'stdout'")
flag.StringVar(&flags.PidFile, "p", "", "path to pid file. if empty, pidfile will not be created")
flag.BoolVar(&flags.Testconf, "t", false, "test configuration and exit")
flag.BoolVar(&flags.Version, "v", false, "print version")
flag.BoolVar(&flags.FullVersion, "V", false, "print full version info")
flag.BoolVar(&flags.Debug, "debug", false, "force DEBUG log level")
flag.Parse()
if flags.Version {
fmt.Printf("%s\n", VersionInfo.GetVersion())
os.Exit(0)
}
if flags.FullVersion {
data, _ := json.MarshalIndent(VersionInfo, "", " ")
fmt.Printf("%s\n", data)
os.Exit(0)
}
var err error
config = service_conf // save a pointer to service's config (NOT a copy, mon!)
commandLine = strings.Join(os.Args, " ") // XXX(antoxa): couldn't think of a better way
hostname = getHostname() // get hostname early
// moved here from init(), just importing a package should not publish expvars
initExpvars()
// current executable full path (symlinks and shit sometimes complicate things)
binaryPath = func() string {
path, err := osutil.GetCurrentBinary()
if err != nil {
// log as notice, non-critical error (only stats affected)
log.Infof("couldn't get current binary (using argv[0] = %q): %v", os.Args[0], err)
return os.Args[0]
}
return path
}()
// config path
confPath := func() string {
if flags.ConfFile != "" {
return flags.ConfFile
}
return default_config_path
}()
// resolve absolute config path, convenient for stats
configPath = func(path string) string {
var err error
if path, err = filepath.Abs(path); err != nil {
return path
}
if path, err = filepath.EvalSymlinks(path); err != nil {
return path
}
return path
}(confPath)
// parse config and construct final config merged with command line flags
// use path as supplied to us in args (i.e. unresolved), just to avoid 'too smart, outsmarted yourself' gotchas
err = ParseConfigFromFile(confPath, service_conf)
if err != nil {
err_message := func(err error) string {
switch real_err := err.(type) {
case nil:
return "syntax is ok"
case *json.SyntaxError:
return fmt.Sprintf("%v at offset %d", real_err, real_err.Offset)
case *os.PathError:
return fmt.Sprintf("%v", real_err)
default:
return fmt.Sprintf("(%T) %v", real_err, real_err)
}
}(err)
stderrLogger.Fatalf("Error in config: %s", err_message)
} else {
if flags.Testconf {
fmt.Printf("testconf %s: syntax is ok\n", configPath)
}
}
mergeCommandlineFlagsToConfig(flags, config)
daemonConfig := config.GetDaemonConfig()
// antoxa: need the fancy wrapper function to have testconf behave properly
// FIXME: testconf should check more stuff (below) and graceful restart also
initPidfileLogfile := func() error {
// FIXME(antoxa): this testconf thingy is everywhere! must... resist... full rewrite
if flags.Testconf {
err = PidfileTest(daemonConfig.GetPidFile())
} else {
pidfile, err = PidfileOpen(daemonConfig.GetPidFile())
}
if err != nil {
return fmt.Errorf("can't open pidfile: %s", err)
}
// FIXME: this is shit ugly
// need better integration between logger and daemon-config
// or 1-to-1 mapping
// or better log package :)
log_level := daemonConfig.GetLogLevel()
if log_level == 0 {
return fmt.Errorf("unknown log_level, supported: %v", badoo_config.ServiceConfigDaemonConfigTLogLevels_name)
}
err = reopenLogfile(daemonConfig.GetLogFile(), log.Level(log_level))
if err != nil {
return fmt.Errorf("can't open logfile: %s", err)
}
return nil
}
err = initPidfileLogfile()
if err != nil {
if flags.Testconf {
stderrLogger.Errorf("%v", err)
fmt.Printf("testconf failed\n")
} else {
stderrLogger.Errorf("%v", err) // always pidfile/logfile errors to stderr
}
os.Exit(1)
} else {
if flags.Testconf {
fmt.Printf("testconf successful\n")
os.Exit(0)
}
}
// log some version info like libangel does
versionString := func() string {
vi := &VersionInfo
version := func() string {
if vi.GetAutoBuildTag() != "" {
return fmt.Sprintf("%s-%s", vi.GetVersion(), vi.GetAutoBuildTag())
} else {
return vi.GetVersion()
}
}()
return fmt.Sprintf("%s version %s, git %s, built %s on %s",
vi.GetVcsBasename(), version, vi.GetVcsShortHash(), vi.GetBuildDate(), vi.GetBuildHost())
}()
log.Infof("%s", versionString)
// max cpus, 0 = all of them
numCPU := func() int {
maxCpus := int(daemonConfig.GetMaxCpus())
if maxCpus <= 0 || maxCpus > runtime.NumCPU() {
maxCpus = runtime.NumCPU()
}
return maxCpus
}()
runtime.GOMAXPROCS(numCPU)
// gc percent, <0 - disables GC
if daemonConfig.GcPercent != nil {
debug.SetGCPercent(int(daemonConfig.GetGcPercent()))
}
// process pinba configuration and related stuff
pinbaSender, err = func() (*PinbaSender, error) { // assigns a global
if daemonConfig.GetPinbaAddress() == "" {
return nil, nil // user doesn't want pinba configured
}
pi, err := PinbaInfoFromConfig(config)
if err != nil {
return nil, err
}
return NewPinbaSender(pi), nil
}()
if err != nil {
log.Fatalf("pinba config error: %v", err)
}
// graceful restart handling
// see restart.go and signals.go for more details
restartData, err = ParseRestartDataFromEnv()
if err != nil {
log.Fatalf("can't parse restart data: %v", err)
}
if restartData != nil {
log.Debugf("[CHILD] this is a restart, parent: %d, me: %d", restartData.PPid, os.Getpid())
}
// start http pprof server (possibly - inherit fd from parent if this is a restart)
err = func() (err error) {
HttpServer, err = newHttpServer(config, restartData) // assigning a global here
if err != nil {
return err
}
if HttpServer != nil { // nil here means it has not been configured
go HttpServer.Serve()
}
return nil
}()
if err != nil {
log.Fatalf("can't start http_pprof server: %v", err)
}
}
// Call this when you want to start your servers and stuff
func EventLoop(ports []Port) {
defer log.Debug("exiting")
initPhaseDuration = time.Since(startupTime)
daemonConfig := config.GetDaemonConfig()
// service-stats ports
ports = append(ports, GpbPort("service-stats-gpb", stats_ctx, badoo_service.Gpbrpc))
ports = append(ports, JsonPort("service-stats-gpb/json", stats_ctx, badoo_service.Gpbrpc))
// build map of ports and do some sanity checks
ph := make(map[string]*Port)
for i := 0; i < len(ports); i++ {
p := &ports[i]
ph[p.Name] = p
// json and gpb ports should have the same context
// so try and warn user about passing plain values in (as it makes a copy)
if reflect.ValueOf(p.Handler).Kind() != reflect.Ptr {
log.Infof("port[%d].Handler should be a pointer (you want gpbs and json to use the same context, right?) (now: %T)", i, p.Handler)
}
}
getRestartSocket := func(rcd *RestartChildData, portName, portAddr string) (*RestartSocket, *os.File) {
if rcd == nil {
return nil, nil
}
restartSocket, exists := rcd.GpbrpcSockets[portName]
if exists == false {
return nil, nil
}
restartFile := os.NewFile(restartSocket.Fd, "")
if restartSocket.Address != portAddr {
return nil, restartFile
}
return &restartSocket, restartFile
}
// start 'em all
for _, lcf := range daemonConfig.GetListen() {
portName, portAddr := lcf.GetProto(), lcf.GetAddress()
port := ph[portName]
if nil == port {
log.Warnf("ignoring unknown port: %s at %s", portName, portAddr)
continue
}
if port.IsStarted {
log.Warnf("ignoring double startup for port: %s at %s", portName, portAddr)
}
listener, err := func() (listener net.Listener, err error) { // it's important that this should be a function, see defer inside
restartSocket, restartFile := getRestartSocket(restartData, portName, portAddr)
// this whole fd/file affair is very inconvenient to
// since when getRestartSocket() returns fd - it can't close it yet, as it can be used by FileListener
defer restartFile.Close()
if restartSocket == nil {
listener, err = net.Listen("tcp", portAddr)
if err != nil {
log.Errorf("listen failed for server %s at %s: %s", portName, portAddr, err)
return
}
log.Infof("port %s bound to address %s", portName, listener.Addr())
} else {
listener, err = net.FileListener(restartFile) // this dup()-s
if err != nil {
log.Errorf("failed to grab parent fd %d for %s at %s: %s", restartSocket.Fd, portName, portAddr, err)
return
}
log.Infof("port %s bound to address %s (parent fd: %d)", portName, listener.Addr(), restartSocket.Fd)
}
return
}()
if err != nil {
os.Exit(1)
}
// enable pinba only for ports that explicitly request it
ps := func() gpbrpc.PinbaSender {
if !lcf.GetPinbaEnabled() {
return nil // explicit nil here
}
if pinbaSender == nil {
log.Warnf("pinba is not configured, but pinba_enabled IS set for port %s: %s", portName, portAddr)
return nil // explicit nil here
}
log.Infof("pinba configured for port %s:%s -> %s", portName, portAddr, pinbaSender.Address)
return pinbaSender
}()
// slow request log time
slowRequestTime := time.Duration(daemonConfig.GetSlowRequestMs()) * time.Millisecond
srv := &Server{
Name: lcf.GetProto(),
Address: lcf.GetAddress(),
Server: gpbrpc.NewServer(listener, port.Proto, port.Codec, port.Handler, ps, slowRequestTime),
}
go srv.Server.Serve()
port.IsStarted = true
StartedServers[port.Name] = srv // save it for laterz
}
// kill parent if this is a child of graceful restart
if restartData != nil {
syscall.Kill(restartData.PPid, syscall.SIGQUIT)
}
log.Infof("entering event loop")
exitMethod := wait_for_signals()
if exitMethod == EXIT_GRACEFULLY { // wait for established connections to close and then die
// FIXME: should stop servers from accepting new connections here!
const ATTEMPTS_PER_SEC = 2
maxAttempts := daemonConfig.GetParentWaitTimeout() * ATTEMPTS_PER_SEC
for i := uint32(0); i < maxAttempts; i++ {
for _, srv := range StartedServers {
currConn := atomic.LoadUint64(&srv.Server.Stats.ConnCur)
if currConn > 0 {
log.Debugf("%s still has %d connections", srv.Name, currConn)
time.Sleep(time.Second / ATTEMPTS_PER_SEC)
}
}
}
} else {
// do nothing for EXIT_IMMEDIATELY
}
// doing cleanups here
// XXX: can this be moved to defer at the start of this function?
if pidfile != nil {
pidfile.CloseAndRemove()
}
}