330 lines
9.2 KiB
Go
330 lines
9.2 KiB
Go
package main
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import (
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"crypto/tls"
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"encoding/json"
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"fmt"
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fmtlog "log"
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"net/http"
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"os"
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"reflect"
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"runtime"
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"strings"
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"text/template"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/containous/flaeg"
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"github.com/containous/staert"
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"github.com/containous/traefik/acme"
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"github.com/containous/traefik/cluster"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/middlewares"
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"github.com/containous/traefik/provider/k8s"
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"github.com/containous/traefik/safe"
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"github.com/containous/traefik/types"
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"github.com/containous/traefik/version"
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"github.com/coreos/go-systemd/daemon"
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"github.com/docker/libkv/store"
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"github.com/satori/go.uuid"
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)
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var versionTemplate = `Version: {{.Version}}
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Codename: {{.Codename}}
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Go version: {{.GoVersion}}
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Built: {{.BuildTime}}
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OS/Arch: {{.Os}}/{{.Arch}}`
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func main() {
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runtime.GOMAXPROCS(runtime.NumCPU())
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//traefik config inits
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traefikConfiguration := NewTraefikConfiguration()
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traefikPointersConfiguration := NewTraefikDefaultPointersConfiguration()
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//traefik Command init
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traefikCmd := &flaeg.Command{
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Name: "traefik",
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Description: `traefik is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease.
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Complete documentation is available at https://traefik.io`,
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Config: traefikConfiguration,
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DefaultPointersConfig: traefikPointersConfiguration,
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Run: func() error {
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run(traefikConfiguration)
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return nil
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},
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}
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//version Command init
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versionCmd := &flaeg.Command{
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Name: "version",
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Description: `Print version`,
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Config: struct{}{},
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DefaultPointersConfig: struct{}{},
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Run: func() error {
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tmpl, err := template.New("").Parse(versionTemplate)
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if err != nil {
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return err
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}
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v := struct {
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Version string
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Codename string
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GoVersion string
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BuildTime string
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Os string
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Arch string
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}{
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Version: version.Version,
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Codename: version.Codename,
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GoVersion: runtime.Version(),
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BuildTime: version.BuildDate,
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Os: runtime.GOOS,
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Arch: runtime.GOARCH,
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}
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if err := tmpl.Execute(os.Stdout, v); err != nil {
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return err
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}
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fmt.Printf("\n")
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return nil
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},
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}
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//storeconfig Command init
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var kv *staert.KvSource
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var err error
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storeconfigCmd := &flaeg.Command{
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Name: "storeconfig",
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Description: `Store the static traefik configuration into a Key-value stores. Traefik will not start.`,
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Config: traefikConfiguration,
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DefaultPointersConfig: traefikPointersConfiguration,
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Run: func() error {
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if kv == nil {
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return fmt.Errorf("Error using command storeconfig, no Key-value store defined")
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}
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jsonConf, err := json.Marshal(traefikConfiguration.GlobalConfiguration)
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if err != nil {
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return err
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}
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fmtlog.Printf("Storing configuration: %s\n", jsonConf)
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err = kv.StoreConfig(traefikConfiguration.GlobalConfiguration)
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if err != nil {
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return err
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}
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if traefikConfiguration.GlobalConfiguration.ACME != nil && len(traefikConfiguration.GlobalConfiguration.ACME.StorageFile) > 0 {
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// convert ACME json file to KV store
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store := acme.NewLocalStore(traefikConfiguration.GlobalConfiguration.ACME.StorageFile)
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object, err := store.Load()
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if err != nil {
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return err
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}
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meta := cluster.NewMetadata(object)
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err = meta.Marshall()
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if err != nil {
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return err
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}
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source := staert.KvSource{
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Store: kv,
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Prefix: traefikConfiguration.GlobalConfiguration.ACME.Storage,
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}
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err = source.StoreConfig(meta)
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if err != nil {
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return err
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}
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}
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return nil
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},
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Metadata: map[string]string{
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"parseAllSources": "true",
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},
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}
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//init flaeg source
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f := flaeg.New(traefikCmd, os.Args[1:])
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//add custom parsers
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f.AddParser(reflect.TypeOf(EntryPoints{}), &EntryPoints{})
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f.AddParser(reflect.TypeOf(DefaultEntryPoints{}), &DefaultEntryPoints{})
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f.AddParser(reflect.TypeOf(types.Constraints{}), &types.Constraints{})
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f.AddParser(reflect.TypeOf(k8s.Namespaces{}), &k8s.Namespaces{})
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f.AddParser(reflect.TypeOf([]acme.Domain{}), &acme.Domains{})
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//add commands
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f.AddCommand(versionCmd)
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f.AddCommand(storeconfigCmd)
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usedCmd, err := f.GetCommand()
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if err != nil {
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fmtlog.Println(err)
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os.Exit(-1)
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}
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if _, err := f.Parse(usedCmd); err != nil {
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fmtlog.Printf("Error parsing command: %s\n", err)
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os.Exit(-1)
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}
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//staert init
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s := staert.NewStaert(traefikCmd)
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//init toml source
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toml := staert.NewTomlSource("traefik", []string{traefikConfiguration.ConfigFile, "/etc/traefik/", "$HOME/.traefik/", "."})
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//add sources to staert
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s.AddSource(toml)
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s.AddSource(f)
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if _, err := s.LoadConfig(); err != nil {
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fmtlog.Println(fmt.Errorf("Error reading TOML config file %s : %s", toml.ConfigFileUsed(), err))
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os.Exit(-1)
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}
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traefikConfiguration.ConfigFile = toml.ConfigFileUsed()
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kv, err = CreateKvSource(traefikConfiguration)
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if err != nil {
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fmtlog.Printf("Error creating kv store: %s\n", err)
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os.Exit(-1)
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}
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// IF a KV Store is enable and no sub-command called in args
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if kv != nil && usedCmd == traefikCmd {
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if traefikConfiguration.Cluster == nil {
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traefikConfiguration.Cluster = &types.Cluster{Node: uuid.NewV4().String()}
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}
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if traefikConfiguration.Cluster.Store == nil {
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traefikConfiguration.Cluster.Store = &types.Store{Prefix: kv.Prefix, Store: kv.Store}
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}
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s.AddSource(kv)
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if _, err := s.LoadConfig(); err != nil {
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fmtlog.Printf("Error loading configuration: %s\n", err)
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os.Exit(-1)
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}
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}
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if err := s.Run(); err != nil {
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fmtlog.Printf("Error running traefik: %s\n", err)
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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) {
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fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
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// load global configuration
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globalConfiguration := traefikConfiguration.GlobalConfiguration
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http.DefaultTransport.(*http.Transport).MaxIdleConnsPerHost = globalConfiguration.MaxIdleConnsPerHost
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if globalConfiguration.InsecureSkipVerify {
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http.DefaultTransport.(*http.Transport).TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
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}
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loggerMiddleware := middlewares.NewLogger(globalConfiguration.AccessLogsFile)
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defer loggerMiddleware.Close()
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if globalConfiguration.File != nil && len(globalConfiguration.File.Filename) == 0 {
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// no filename, setting to global config file
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if len(traefikConfiguration.ConfigFile) != 0 {
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globalConfiguration.File.Filename = traefikConfiguration.ConfigFile
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} else {
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log.Errorln("Error using file configuration backend, no filename defined")
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}
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}
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if len(globalConfiguration.EntryPoints) == 0 {
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globalConfiguration.EntryPoints = map[string]*EntryPoint{"http": {Address: ":80"}}
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globalConfiguration.DefaultEntryPoints = []string{"http"}
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}
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if globalConfiguration.Debug {
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globalConfiguration.LogLevel = "DEBUG"
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}
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// logging
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level, err := logrus.ParseLevel(strings.ToLower(globalConfiguration.LogLevel))
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if err != nil {
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log.Error("Error getting level", err)
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}
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log.SetLevel(level)
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if len(globalConfiguration.TraefikLogsFile) > 0 {
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fi, err := os.OpenFile(globalConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
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defer func() {
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if err := fi.Close(); err != nil {
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log.Error("Error closing file", err)
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}
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}()
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if err != nil {
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log.Error("Error opening file", err)
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} else {
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log.SetOutput(fi)
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log.SetFormatter(&logrus.TextFormatter{DisableColors: true, FullTimestamp: true, DisableSorting: true})
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}
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} else {
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log.SetFormatter(&logrus.TextFormatter{FullTimestamp: true, DisableSorting: true})
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}
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jsonConf, _ := json.Marshal(globalConfiguration)
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log.Infof("Traefik version %s built on %s", version.Version, version.BuildDate)
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if globalConfiguration.CheckNewVersion {
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ticker := time.NewTicker(24 * time.Hour)
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safe.Go(func() {
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version.CheckNewVersion()
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for {
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select {
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case <-ticker.C:
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version.CheckNewVersion()
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}
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}
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})
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}
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if len(traefikConfiguration.ConfigFile) != 0 {
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log.Infof("Using TOML configuration file %s", traefikConfiguration.ConfigFile)
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}
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log.Debugf("Global configuration loaded %s", string(jsonConf))
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server := NewServer(globalConfiguration)
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server.Start()
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defer server.Close()
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sent, err := daemon.SdNotify("READY=1")
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if !sent && err != nil {
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log.Error("Fail to notify", err)
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}
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server.Wait()
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log.Info("Shutting down")
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}
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// CreateKvSource creates KvSource
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// TLS support is enable for Consul and Etcd backends
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func CreateKvSource(traefikConfiguration *TraefikConfiguration) (*staert.KvSource, error) {
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var kv *staert.KvSource
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var store store.Store
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var err error
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switch {
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case traefikConfiguration.Consul != nil:
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store, err = traefikConfiguration.Consul.CreateStore()
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kv = &staert.KvSource{
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Store: store,
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Prefix: traefikConfiguration.Consul.Prefix,
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}
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case traefikConfiguration.Etcd != nil:
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store, err = traefikConfiguration.Etcd.CreateStore()
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kv = &staert.KvSource{
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Store: store,
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Prefix: traefikConfiguration.Etcd.Prefix,
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}
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case traefikConfiguration.Zookeeper != nil:
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store, err = traefikConfiguration.Zookeeper.CreateStore()
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kv = &staert.KvSource{
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Store: store,
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Prefix: traefikConfiguration.Zookeeper.Prefix,
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}
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case traefikConfiguration.Boltdb != nil:
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store, err = traefikConfiguration.Boltdb.CreateStore()
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kv = &staert.KvSource{
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Store: store,
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Prefix: traefikConfiguration.Boltdb.Prefix,
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}
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}
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return kv, err
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}
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