// listenAndServeWithStopper wraps graceful.Server's
// ListenAndServe/ListenAndServeTLS and adds the ability to interrupt them with
// the provided utils.Stopper
func listenAndServeWithStopper(srv *graceful.Server, st *utils.Stopper, certFile, keyFile string) {
go func() {
<-st.Chan()
srv.Stop(0)
}()
var err error
if certFile != "" && keyFile != "" {
log.Info("API: TLS Enabled")
err = srv.ListenAndServeTLS(certFile, keyFile)
} else {
err = srv.ListenAndServe()
}
if opErr, ok := err.(*net.OpError); !ok || (ok && opErr.Op != "accept") {
log.Fatal(err)
}
}
func main() {
kingpin.Parse()
fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
var srv *graceful.Server
var configurationRouter *mux.Router
var configurationChan = make(chan *Configuration, 10)
defer close(configurationChan)
var providers = []Provider{}
var format = logging.MustStringFormatter("%{color}%{time:15:04:05.000} %{shortfile:20.20s} %{level:8.8s} %{id:03x} ▶%{color:reset} %{message}")
var sigs = make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
// load global configuration
gloablConfiguration := LoadFileConfig(*globalConfigFile)
loggerMiddleware := middlewares.NewLogger(gloablConfiguration.AccessLogsFile)
defer loggerMiddleware.Close()
// logging
backends := []logging.Backend{}
level, err := logging.LogLevel(gloablConfiguration.LogLevel)
if err != nil {
log.Fatal("Error getting level", err)
}
if len(gloablConfiguration.TraefikLogsFile) > 0 {
fi, err := os.OpenFile(gloablConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
defer fi.Close()
if err != nil {
log.Fatal("Error opening file", err)
} else {
logBackend := logging.NewLogBackend(fi, "", 0)
logBackendFormatter := logging.NewBackendFormatter(logBackend, logging.GlogFormatter)
backends = append(backends, logBackendFormatter)
}
}
if gloablConfiguration.TraefikLogsStdout {
logBackend := logging.NewLogBackend(os.Stdout, "", 0)
logBackendFormatter := logging.NewBackendFormatter(logBackend, format)
backends = append(backends, logBackendFormatter)
}
logging.SetBackend(backends...)
logging.SetLevel(level, "traefik")
configurationRouter = LoadDefaultConfig(gloablConfiguration)
// listen new configurations from providers
go func() {
for {
configuration := <-configurationChan
log.Info("Configuration receveived %+v", configuration)
if configuration == nil {
log.Info("Skipping empty configuration")
} else if reflect.DeepEqual(currentConfiguration, configuration) {
log.Info("Skipping same configuration")
} else {
newConfigurationRouter, err := LoadConfig(configuration, gloablConfiguration)
if err == nil {
currentConfiguration = configuration
configurationRouter = newConfigurationRouter
srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
time.Sleep(3 * time.Second)
} else {
log.Error("Error loading new configuration, aborted ", err)
}
}
}
}()
// configure providers
if gloablConfiguration.Docker != nil {
providers = append(providers, gloablConfiguration.Docker)
}
if gloablConfiguration.Marathon != nil {
providers = append(providers, gloablConfiguration.Marathon)
}
if gloablConfiguration.File != nil {
if len(gloablConfiguration.File.Filename) == 0 {
// no filename, setting to global config file
gloablConfiguration.File.Filename = *globalConfigFile
}
providers = append(providers, gloablConfiguration.File)
}
if gloablConfiguration.Web != nil {
providers = append(providers, gloablConfiguration.Web)
}
if gloablConfiguration.Consul != nil {
providers = append(providers, gloablConfiguration.Consul)
}
// start providers
for _, provider := range providers {
log.Notice("Starting provider %v %+v", reflect.TypeOf(provider), provider)
currentProvider := provider
go func() {
currentProvider.Provide(configurationChan)
}()
}
goAway := false
go func() {
sig := <-sigs
log.Notice("I have to go... %+v", sig)
goAway = true
srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
}()
for {
if goAway {
break
}
// middlewares
var negroni = negroni.New()
negroni.Use(metrics)
negroni.Use(loggerMiddleware)
//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
//negroni.Use(middlewares.NewRoutes(configurationRouter))
negroni.UseHandler(configurationRouter)
srv = &graceful.Server{
Timeout: time.Duration(gloablConfiguration.GraceTimeOut) * time.Second,
NoSignalHandling: true,
Server: &http.Server{
Addr: gloablConfiguration.Port,
Handler: negroni,
},
}
go func() {
if len(gloablConfiguration.CertFile) > 0 && len(gloablConfiguration.KeyFile) > 0 {
srv.ListenAndServeTLS(gloablConfiguration.CertFile, gloablConfiguration.KeyFile)
} else {
srv.ListenAndServe()
}
}()
log.Notice("Started")
<-srv.StopChan()
log.Notice("Stopped")
}
}
func main() {
kingpin.Parse()
fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
var srv *graceful.Server
var configurationRouter *mux.Router
var configurationChan = make(chan *Configuration, 10)
defer close(configurationChan)
var providers = []Provider{}
var sigs = make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
// load global configuration
gloablConfiguration := LoadFileConfig(*globalConfigFile)
loggerMiddleware := middlewares.NewLogger(gloablConfiguration.AccessLogsFile)
defer loggerMiddleware.Close()
// logging
level, err := log.ParseLevel(strings.ToLower(gloablConfiguration.LogLevel))
if err != nil {
log.Fatal("Error getting level", err)
}
log.SetLevel(level)
if len(gloablConfiguration.TraefikLogsFile) > 0 {
fi, err := os.OpenFile(gloablConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
defer fi.Close()
if err != nil {
log.Fatal("Error opening file", err)
} else {
log.SetOutput(fi)
log.SetFormatter(&log.TextFormatter{DisableColors: true, FullTimestamp: true, DisableSorting: true})
}
} else {
log.SetFormatter(&log.TextFormatter{FullTimestamp: true, DisableSorting: true})
}
configurationRouter = LoadDefaultConfig(gloablConfiguration)
// listen new configurations from providers
go func() {
for {
configuration := <-configurationChan
log.Infof("Configuration receveived %+v", configuration)
if configuration == nil {
log.Info("Skipping empty configuration")
} else if reflect.DeepEqual(currentConfiguration, configuration) {
log.Info("Skipping same configuration")
} else {
newConfigurationRouter, err := LoadConfig(configuration, gloablConfiguration)
if err == nil {
currentConfiguration = configuration
configurationRouter = newConfigurationRouter
srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
time.Sleep(3 * time.Second)
} else {
log.Error("Error loading new configuration, aborted ", err)
}
}
}
}()
// configure providers
if gloablConfiguration.Docker != nil {
providers = append(providers, gloablConfiguration.Docker)
}
if gloablConfiguration.Marathon != nil {
providers = append(providers, gloablConfiguration.Marathon)
}
if gloablConfiguration.File != nil {
if len(gloablConfiguration.File.Filename) == 0 {
// no filename, setting to global config file
gloablConfiguration.File.Filename = *globalConfigFile
}
providers = append(providers, gloablConfiguration.File)
}
if gloablConfiguration.Web != nil {
providers = append(providers, gloablConfiguration.Web)
}
if gloablConfiguration.Consul != nil {
providers = append(providers, gloablConfiguration.Consul)
}
// start providers
for _, provider := range providers {
log.Infof("Starting provider %v %+v", reflect.TypeOf(provider), provider)
currentProvider := provider
go func() {
currentProvider.Provide(configurationChan)
}()
}
goAway := false
go func() {
sig := <-sigs
log.Infof("I have to go... %+v", sig)
goAway = true
srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
}()
for {
if goAway {
break
}
// middlewares
var negroni = negroni.New()
negroni.Use(metrics)
negroni.Use(loggerMiddleware)
//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
//negroni.Use(middlewares.NewRoutes(configurationRouter))
negroni.UseHandler(configurationRouter)
srv = &graceful.Server{
Timeout: time.Duration(gloablConfiguration.GraceTimeOut) * time.Second,
NoSignalHandling: true,
Server: &http.Server{
Addr: gloablConfiguration.Port,
Handler: negroni,
},
}
go func() {
if len(gloablConfiguration.CertFile) > 0 && len(gloablConfiguration.KeyFile) > 0 {
err := srv.ListenAndServeTLS(gloablConfiguration.CertFile, gloablConfiguration.KeyFile)
if err != nil {
netOpError, ok := err.(*net.OpError)
if ok && netOpError.Err.Error() != "use of closed network connection" {
log.Fatal("Error creating server: ", err)
}
}
} else {
err := srv.ListenAndServe()
if err != nil {
netOpError, ok := err.(*net.OpError)
if ok && netOpError.Err.Error() != "use of closed network connection" {
log.Fatal("Error creating server: ", err)
}
}
}
}()
log.Info("Started")
<-srv.StopChan()
log.Info("Stopped")
}
}