traefik/traefik.go

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package main
import (
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"encoding/json"
log "github.com/Sirupsen/logrus"
"github.com/containous/flaeg"
"github.com/containous/staert"
"github.com/containous/traefik/acme"
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"github.com/containous/traefik/middlewares"
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"github.com/containous/traefik/provider"
fmtlog "log"
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"net/http"
"os"
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"reflect"
"runtime"
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"strings"
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)
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func main() {
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runtime.GOMAXPROCS(runtime.NumCPU())
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//traefik config inits
traefikConfiguration := NewTraefikConfiguration()
traefikPointersConfiguration := NewTraefikDefaultPointersConfiguration()
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//traefik Command init
traefikCmd := &flaeg.Command{
Name: "traefik",
Description: `traefik is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease.
Complete documentation is available at https://traefik.io`,
Config: traefikConfiguration,
DefaultPointersConfig: traefikPointersConfiguration,
Run: func() error {
run(traefikConfiguration)
return nil
},
}
//version Command init
versionCmd := &flaeg.Command{
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Name: "version",
Description: `Print version`,
Config: struct{}{},
DefaultPointersConfig: struct{}{},
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Run: func() error {
fmtlog.Println(Version + " built on the " + BuildDate)
return nil
},
}
//init flaeg source
f := flaeg.New(traefikCmd, os.Args[1:])
//add custom parsers
f.AddParser(reflect.TypeOf(EntryPoints{}), &EntryPoints{})
f.AddParser(reflect.TypeOf(DefaultEntryPoints{}), &DefaultEntryPoints{})
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f.AddParser(reflect.TypeOf(provider.Namespaces{}), &provider.Namespaces{})
f.AddParser(reflect.TypeOf([]acme.Domain{}), &acme.Domains{})
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//add version command
f.AddCommand(versionCmd)
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if _, err := f.Parse(traefikCmd); err != nil {
fmtlog.Println(err)
os.Exit(-1)
}
//staert init
s := staert.NewStaert(traefikCmd)
//init toml source
toml := staert.NewTomlSource("traefik", []string{traefikConfiguration.ConfigFile, "/etc/traefik/", "$HOME/.traefik/", "."})
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//add sources to staert
s.AddSource(toml)
s.AddSource(f)
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if _, err := s.LoadConfig(); err != nil {
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fmtlog.Println(err)
}
traefikConfiguration.ConfigFile = toml.ConfigFileUsed()
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if err := s.Run(); err != nil {
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fmtlog.Println(err)
os.Exit(-1)
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}
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os.Exit(0)
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}
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func run(traefikConfiguration *TraefikConfiguration) {
fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
// load global configuration
globalConfiguration := traefikConfiguration.GlobalConfiguration
http.DefaultTransport.(*http.Transport).MaxIdleConnsPerHost = globalConfiguration.MaxIdleConnsPerHost
loggerMiddleware := middlewares.NewLogger(globalConfiguration.AccessLogsFile)
defer loggerMiddleware.Close()
// logging
level, err := log.ParseLevel(strings.ToLower(globalConfiguration.LogLevel))
if err != nil {
log.Fatal("Error getting level", err)
}
log.SetLevel(level)
if traefikConfiguration.File != nil && len(traefikConfiguration.File.Filename) == 0 {
// no filename, setting to global config file
if len(traefikConfiguration.ConfigFile) != 0 {
traefikConfiguration.File.Filename = traefikConfiguration.ConfigFile
} else {
log.Errorln("Error using file configuration backend, no filename defined")
}
}
if len(traefikConfiguration.EntryPoints) == 0 {
traefikConfiguration.EntryPoints = map[string]*EntryPoint{"http": {Address: ":80"}}
traefikConfiguration.DefaultEntryPoints = []string{"http"}
}
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if len(globalConfiguration.TraefikLogsFile) > 0 {
fi, err := os.OpenFile(globalConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
defer func() {
if err := fi.Close(); err != nil {
log.Error("Error closinf file", err)
}
}()
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})
}
jsonConf, _ := json.Marshal(globalConfiguration)
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log.Infof("Traefik version %s built on %s", Version, BuildDate)
if len(traefikConfiguration.ConfigFile) != 0 {
log.Infof("Using TOML configuration file %s", traefikConfiguration.ConfigFile)
}
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log.Debugf("Global configuration loaded %s", string(jsonConf))
server := NewServer(globalConfiguration)
server.Start()
defer server.Close()
log.Info("Shutting down")
}