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Negroni middlewares

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This commit is contained in:
emile 2015-09-12 15:10:03 +02:00
parent d209467b5a
commit 36847f671f
8 changed files with 139 additions and 120 deletions
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2
configuration.go
View file

@ -47,4 +47,4 @@ type Route struct {
type Configuration struct {
Backends map[string]Backend
Routes map[string]Route
}
}

41
docker.go
View file

@ -1,13 +1,14 @@
package main
import (
"github.com/fsouza/go-dockerclient"
"github.com/leekchan/gtf"
"bytes"
"github.com/BurntSushi/toml"
"text/template"
"strings"
"github.com/BurntSushi/ty/fun"
"github.com/fsouza/go-dockerclient"
"github.com/leekchan/gtf"
"strconv"
"strings"
"text/template"
)
type DockerProvider struct {
@ -30,7 +31,7 @@ func NewDockerProvider() *DockerProvider {
var DockerFuncMap = template.FuncMap{
"getBackend": func(container docker.Container) string {
for key, value := range container.Config.Labels {
if (key == "traefik.backend") {
if key == "traefik.backend" {
return value
}
}
@ -38,7 +39,7 @@ var DockerFuncMap = template.FuncMap{
},
"getPort": func(container docker.Container) string {
for key, value := range container.Config.Labels {
if (key == "traefik.port") {
if key == "traefik.port" {
return value
}
}
@ -49,7 +50,7 @@ var DockerFuncMap = template.FuncMap{
},
"getWeight": func(container docker.Container) string {
for key, value := range container.Config.Labels {
if (key == "traefik.weight") {
if key == "traefik.weight" {
return value
}
}
@ -61,29 +62,29 @@ var DockerFuncMap = template.FuncMap{
"getHost": getHost,
}
func (provider *DockerProvider) Provide(configurationChan chan <- *Configuration) {
func (provider *DockerProvider) Provide(configurationChan chan<- *Configuration) {
if client, err := docker.NewClient(provider.Endpoint); err != nil {
log.Fatalf("Failed to create a client for docker, error: %s", err)
} else {
provider.dockerClient = client
_, err := provider.dockerClient.Info()
if (err != nil){
if err != nil {
log.Fatalf("Docker connection error %+v", err)
}
log.Debug("Docker connection established")
dockerEvents := make(chan *docker.APIEvents)
if (provider.Watch) {
if provider.Watch {
provider.dockerClient.AddEventListener(dockerEvents)
go func() {
for {
event := <-dockerEvents
if (event == nil){
if event == nil {
log.Fatalf("Docker connection error %+v", err)
}
if(event.Status == "start" || event.Status == "die"){
if event.Status == "start" || event.Status == "die" {
log.Debug("Docker event receveived %+v", event)
configuration := provider.loadDockerConfig()
if (configuration != nil) {
if configuration != nil {
configurationChan <- configuration
}
}
@ -110,16 +111,16 @@ func (provider *DockerProvider) loadDockerConfig() *Configuration {
// filter containers
filteredContainers := fun.Filter(func(container docker.Container) bool {
if (len(container.NetworkSettings.Ports) == 0) {
if len(container.NetworkSettings.Ports) == 0 {
log.Debug("Filtering container without port %s", container.Name)
return false
}
_, err := strconv.Atoi(container.Config.Labels["traefik.port"])
if (len(container.NetworkSettings.Ports) > 1 && err != nil) {
if len(container.NetworkSettings.Ports) > 1 && err != nil {
log.Debug("Filtering container with more than 1 port and no traefik.port label %s", container.Name)
return false
}
if (container.Config.Labels["traefik.enable"] == "false") {
if container.Config.Labels["traefik.enable"] == "false" {
log.Debug("Filtering disabled container %s", container.Name)
return false
}
@ -141,13 +142,13 @@ func (provider *DockerProvider) loadDockerConfig() *Configuration {
}
gtf.Inject(DockerFuncMap)
tmpl := template.New(provider.Filename).Funcs(DockerFuncMap)
if(len(provider.Filename) > 0){
if len(provider.Filename) > 0 {
_, err := tmpl.ParseFiles(provider.Filename)
if err != nil {
log.Error("Error reading file", err)
return nil
}
}else{
} else {
buf, err := Asset("providerTemplates/docker.tmpl")
if err != nil {
log.Error("Error reading file", err)
@ -175,9 +176,9 @@ func (provider *DockerProvider) loadDockerConfig() *Configuration {
func getHost(container docker.Container) string {
for key, value := range container.Config.Labels {
if (key == "traefik.host") {
if key == "traefik.host" {
return value
}
}
return strings.Replace(strings.Replace(container.Name, "/", "", -1), ".", "-", -1)
}
}

16
file.go
View file

@ -1,15 +1,15 @@
package main
import (
"gopkg.in/fsnotify.v1"
"github.com/BurntSushi/toml"
"gopkg.in/fsnotify.v1"
"os"
"path/filepath"
"strings"
)
type FileProvider struct {
Watch bool
Watch bool
Filename string
}
@ -21,7 +21,7 @@ func NewFileProvider() *FileProvider {
return fileProvider
}
func (provider *FileProvider) Provide(configurationChan chan<- *Configuration){
func (provider *FileProvider) Provide(configurationChan chan<- *Configuration) {
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Error("Error creating file watcher", err)
@ -42,10 +42,10 @@ func (provider *FileProvider) Provide(configurationChan chan<- *Configuration){
for {
select {
case event := <-watcher.Events:
if(strings.Contains(event.Name,file.Name())){
if strings.Contains(event.Name, file.Name()) {
log.Debug("File event:", event)
configuration := provider.LoadFileConfig(file.Name())
if(configuration != nil) {
if configuration != nil {
configurationChan <- configuration
}
}
@ -55,7 +55,7 @@ func (provider *FileProvider) Provide(configurationChan chan<- *Configuration){
}
}()
if(provider.Watch){
if provider.Watch {
err = watcher.Add(filepath.Dir(file.Name()))
}
@ -64,13 +64,11 @@ func (provider *FileProvider) Provide(configurationChan chan<- *Configuration){
return
}
configuration := provider.LoadFileConfig(file.Name())
configurationChan <- configuration
<-done
}
func (provider *FileProvider) LoadFileConfig(filename string) *Configuration {
configuration := new(Configuration)
if _, err := toml.DecodeFile(filename, configuration); err != nil {
@ -78,4 +76,4 @@ func (provider *FileProvider) LoadFileConfig(filename string) *Configuration {
return nil
}
return configuration
}
}

2
generate.go
View file

@ -6,4 +6,4 @@ Copyright
//go:generate rm -vf gen.go
//go:generate go-bindata -o gen.go static/... templates/... providerTemplates/...
package main
package main

45
marathon.go
View file

@ -1,13 +1,14 @@
package main
import (
"github.com/gambol99/go-marathon"
"github.com/leekchan/gtf"
"bytes"
"github.com/BurntSushi/toml"
"text/template"
"strings"
"strconv"
"github.com/BurntSushi/ty/fun"
"github.com/gambol99/go-marathon"
"github.com/leekchan/gtf"
"strconv"
"strings"
"text/template"
)
type MarathonProvider struct {
@ -38,7 +39,7 @@ var MarathonFuncMap = template.FuncMap{
},
"getHost": func(application marathon.Application) string {
for key, value := range application.Labels {
if (key == "traefik.host") {
if key == "traefik.host" {
return value
}
}
@ -46,7 +47,7 @@ var MarathonFuncMap = template.FuncMap{
},
"getWeight": func(application marathon.Application) string {
for key, value := range application.Labels {
if (key == "traefik.weight") {
if key == "traefik.weight" {
return value
}
}
@ -57,7 +58,7 @@ var MarathonFuncMap = template.FuncMap{
},
}
func (provider *MarathonProvider) Provide(configurationChan chan <- *Configuration) {
func (provider *MarathonProvider) Provide(configurationChan chan<- *Configuration) {
config := marathon.NewDefaultConfig()
config.URL = provider.Endpoint
config.EventsInterface = provider.NetworkInterface
@ -67,7 +68,7 @@ func (provider *MarathonProvider) Provide(configurationChan chan <- *Configurati
} else {
provider.marathonClient = client
update := make(marathon.EventsChannel, 5)
if (provider.Watch) {
if provider.Watch {
if err := client.AddEventsListener(update, marathon.EVENTS_APPLICATIONS); err != nil {
log.Error("Failed to register for subscriptions, %s", err)
} else {
@ -76,7 +77,7 @@ func (provider *MarathonProvider) Provide(configurationChan chan <- *Configurati
event := <-update
log.Debug("Marathon event receveived", event)
configuration := provider.loadMarathonConfig()
if (configuration != nil) {
if configuration != nil {
configurationChan <- configuration
}
}
@ -93,30 +94,30 @@ func (provider *MarathonProvider) loadMarathonConfig() *Configuration {
configuration := new(Configuration)
applications, err := provider.marathonClient.Applications(nil)
if (err != nil) {
if err != nil {
log.Error("Failed to create a client for marathon, error: %s", err)
return nil
}
tasks, err := provider.marathonClient.AllTasks()
if (err != nil) {
if err != nil {
log.Error("Failed to create a client for marathon, error: %s", err)
return nil
}
//filter tasks
filteredTasks := fun.Filter(func(task marathon.Task) bool {
if (len(task.Ports) == 0) {
if len(task.Ports) == 0 {
log.Debug("Filtering marathon task without port", task.AppID)
return false
}
application := getApplication(task, applications.Apps)
_, err := strconv.Atoi(application.Labels["traefik.port"])
if (len(application.Ports) > 1 && err != nil) {
if len(application.Ports) > 1 && err != nil {
log.Debug("Filtering marathon task with more than 1 port and no traefik.port label", task.AppID)
return false
}
if (application.Labels["traefik.enable"] == "false") {
if application.Labels["traefik.enable"] == "false" {
log.Debug("Filtering disabled marathon task", task.AppID)
return false
}
@ -126,12 +127,12 @@ func (provider *MarathonProvider) loadMarathonConfig() *Configuration {
//filter apps
filteredApps := fun.Filter(func(app marathon.Application) bool {
//get ports from app tasks
if (!fun.Exists(func(task marathon.Task) bool {
if (task.AppID == app.ID) {
if !fun.Exists(func(task marathon.Task) bool {
if task.AppID == app.ID {
return true
}
return false
}, filteredTasks)) {
}, filteredTasks) {
return false
}
return true
@ -149,13 +150,13 @@ func (provider *MarathonProvider) loadMarathonConfig() *Configuration {
gtf.Inject(MarathonFuncMap)
tmpl := template.New(provider.Filename).Funcs(DockerFuncMap)
if(len(provider.Filename) > 0){
if len(provider.Filename) > 0 {
_, err := tmpl.ParseFiles(provider.Filename)
if err != nil {
log.Error("Error reading file", err)
return nil
}
}else{
} else {
buf, err := Asset("providerTemplates/marathon.tmpl")
if err != nil {
log.Error("Error reading file", err)
@ -185,9 +186,9 @@ func (provider *MarathonProvider) loadMarathonConfig() *Configuration {
func getApplication(task marathon.Task, apps []marathon.Application) *marathon.Application {
for _, application := range apps {
if (application.ID == task.AppID) {
if application.ID == task.AppID {
return &application
}
}
return nil
}
}

37
middlewares/logger.go Normal file
View file

@ -0,0 +1,37 @@
/*
Copyright
*/
package middlewares
import (
"log"
"net/http"
"os"
"github.com/gorilla/handlers"
)
// Logger is a middleware handler that logs the request as it goes in and the response as it goes out.
type Logger struct {
file *os.File
}
// NewLogger returns a new Logger instance
func NewLogger(file string) *Logger {
if (len(file) > 0 ) {
fi, err := os.OpenFile(file, os.O_RDWR | os.O_CREATE | os.O_APPEND, 0666)
if err != nil {
log.Fatal("Error opening file", err)
}
return &Logger{fi}
}else {
return &Logger{nil}
}
}
func (l *Logger) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
if(l.file == nil){
next(rw, r)
}else{
handlers.CombinedLoggingHandler(l.file, next).ServeHTTP(rw, r)
}
}

100
traefik.go
View file

@ -1,10 +1,17 @@
package main
import (
"github.com/BurntSushi/toml"
"github.com/codegangsta/negroni"
"github.com/gorilla/mux"
"github.com/mailgun/oxy/forward"
"github.com/mailgun/oxy/roundrobin"
"github.com/op/go-logging"
"github.com/thoas/stats"
"github.com/tylerb/graceful"
"github.com/unrolled/render"
"gopkg.in/alecthomas/kingpin.v2"
"./middlewares"
"net/http"
"net/url"
"os"
@ -12,23 +19,16 @@ import (
"reflect"
"syscall"
"time"
"github.com/op/go-logging"
"github.com/BurntSushi/toml"
"github.com/gorilla/handlers"
"github.com/unrolled/render"
"gopkg.in/alecthomas/kingpin.v2"
"github.com/thoas/stats"
)
var (
globalConfigFile = kingpin.Arg("conf", "Main configration file.").Default("traefik.toml").String()
globalConfigFile = kingpin.Arg("conf", "Main configration file.").Default("traefik.toml").String()
currentConfiguration = new(Configuration)
metrics = stats.New()
log = logging.MustGetLogger("traefik")
templatesRenderer = render.New(render.Options{
Directory: "templates",
Asset: Asset,
metrics = stats.New()
log = logging.MustGetLogger("traefik")
templatesRenderer = render.New(render.Options{
Directory: "templates",
Asset: Asset,
AssetNames: AssetNames,
})
)
@ -53,11 +53,11 @@ func main() {
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)
if len(gloablConfiguration.TraefikLogsFile) > 0 {
fi, err := os.OpenFile(gloablConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatal("Error opening file", err)
}else {
} else {
logBackend := logging.NewLogBackend(fi, "", 0)
logBackendFormatter := logging.NewBackendFormatter(logBackend, logging.GlogFormatter)
logBackendLeveled := logging.AddModuleLevel(logBackend)
@ -65,7 +65,7 @@ func main() {
backends = append(backends, logBackendFormatter)
}
}
if (gloablConfiguration.TraefikLogsStdout) {
if gloablConfiguration.TraefikLogsStdout {
logBackend := logging.NewLogBackend(os.Stdout, "", 0)
logBackendFormatter := logging.NewBackendFormatter(logBackend, format)
logBackendLeveled := logging.AddModuleLevel(logBackend)
@ -74,7 +74,6 @@ func main() {
}
logging.SetBackend(backends...)
configurationRouter = LoadDefaultConfig(gloablConfiguration)
// listen new configurations from providers
@ -84,32 +83,32 @@ func main() {
log.Info("Configuration receveived %+v", configuration)
if configuration == nil {
log.Info("Skipping empty configuration")
} else if (reflect.DeepEqual(currentConfiguration, configuration)) {
} else if reflect.DeepEqual(currentConfiguration, configuration) {
log.Info("Skipping same configuration")
} else {
currentConfiguration = configuration
configurationRouter = LoadConfig(configuration, gloablConfiguration)
srv.Stop(10 * time.Second)
srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
time.Sleep(3 * time.Second)
}
}
}()
// configure providers
if (gloablConfiguration.Docker != nil) {
if gloablConfiguration.Docker != nil {
providers = append(providers, gloablConfiguration.Docker)
}
if (gloablConfiguration.Marathon != nil) {
if gloablConfiguration.Marathon != nil {
providers = append(providers, gloablConfiguration.Marathon)
}
if (gloablConfiguration.File != nil) {
if (len(gloablConfiguration.File.Filename) == 0) {
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) {
if gloablConfiguration.Web != nil {
providers = append(providers, gloablConfiguration.Web)
}
@ -134,18 +133,25 @@ func main() {
if goAway {
break
}
// middlewares
var negroni = negroni.New()
negroni.Use(metrics)
negroni.Use(middlewares.NewLogger(gloablConfiguration.AccessLogsFile))
negroni.UseHandler(configurationRouter)
srv = &graceful.Server{
Timeout: time.Duration(gloablConfiguration.GraceTimeOut) * time.Second,
Timeout: time.Duration(gloablConfiguration.GraceTimeOut) * time.Second,
NoSignalHandling: true,
Server: &http.Server{
Addr: gloablConfiguration.Port,
Handler: metrics.Handler(configurationRouter),
Handler: negroni,
},
}
go func() {
if (len(gloablConfiguration.CertFile) > 0 && len(gloablConfiguration.KeyFile) > 0) {
if len(gloablConfiguration.CertFile) > 0 && len(gloablConfiguration.KeyFile) > 0 {
srv.ListenAndServeTLS(gloablConfiguration.CertFile, gloablConfiguration.KeyFile)
} else {
srv.ListenAndServe()
@ -163,29 +169,13 @@ func notFoundHandler(w http.ResponseWriter, r *http.Request) {
func LoadDefaultConfig(gloablConfiguration *GlobalConfiguration) *mux.Router {
router := mux.NewRouter()
if (len(gloablConfiguration.AccessLogsFile) > 0 ) {
fi, err := os.OpenFile(gloablConfiguration.AccessLogsFile, os.O_RDWR | os.O_CREATE | os.O_APPEND, 0666)
if err != nil {
log.Fatal("Error opening file", err)
}
router.NotFoundHandler = handlers.CombinedLoggingHandler(fi, http.HandlerFunc(notFoundHandler))
}else {
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
}
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
return router
}
func LoadConfig(configuration *Configuration, gloablConfiguration *GlobalConfiguration) *mux.Router {
router := mux.NewRouter()
if (len(gloablConfiguration.AccessLogsFile) > 0 ) {
fi, err := os.OpenFile(gloablConfiguration.AccessLogsFile, os.O_RDWR | os.O_CREATE | os.O_APPEND, 0666)
if err != nil {
log.Fatal("Error opening file", err)
}
router.NotFoundHandler = handlers.CombinedLoggingHandler(fi, http.HandlerFunc(notFoundHandler))
}else {
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
}
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
backends := map[string]http.Handler{}
for routeName, route := range configuration.Routes {
log.Debug("Creating route %s", routeName)
@ -196,7 +186,7 @@ func LoadConfig(configuration *Configuration, gloablConfiguration *GlobalConfigu
newRouteReflect := Invoke(newRoute, rule.Category, rule.Value)
newRoute = newRouteReflect[0].Interface().(*mux.Route)
}
if (backends[route.Backend] ==nil) {
if backends[route.Backend] == nil {
log.Debug("Creating backend %s", route.Backend)
lb, _ := roundrobin.New(fwd)
rb, _ := roundrobin.NewRebalancer(lb)
@ -205,19 +195,11 @@ func LoadConfig(configuration *Configuration, gloablConfiguration *GlobalConfigu
url, _ := url.Parse(server.Url)
rb.UpsertServer(url, roundrobin.Weight(server.Weight))
}
backends[route.Backend]=lb
}else {
backends[route.Backend] = lb
} else {
log.Debug("Reusing backend %s", route.Backend)
}
if (len(gloablConfiguration.AccessLogsFile) > 0 ) {
fi, err := os.OpenFile(gloablConfiguration.AccessLogsFile, os.O_RDWR | os.O_CREATE | os.O_APPEND, 0666)
if err != nil {
log.Fatal("Error opening file ", err)
}
newRoute.Handler(handlers.CombinedLoggingHandler(fi, backends[route.Backend]))
}else {
newRoute.Handler(backends[route.Backend])
}
newRoute.Handler(backends[route.Backend])
err := newRoute.GetError()
if err != nil {
log.Error("Error building route ", err)
@ -241,4 +223,4 @@ func LoadFileConfig(file string) *GlobalConfiguration {
}
log.Debug("Global configuration loaded %+v", configuration)
return configuration
}
}

16
web.go
View file

@ -1,12 +1,12 @@
package main
import (
"github.com/gorilla/mux"
"net/http"
"fmt"
"io/ioutil"
"encoding/json"
"fmt"
"github.com/elazarl/go-bindata-assetfs"
"github.com/gorilla/mux"
"io/ioutil"
"net/http"
)
type WebProvider struct {
@ -17,7 +17,7 @@ type Page struct {
Configuration Configuration
}
func (provider *WebProvider) Provide(configurationChan chan <- *Configuration) {
func (provider *WebProvider) Provide(configurationChan chan<- *Configuration) {
systemRouter := mux.NewRouter()
systemRouter.Methods("GET").PathPrefix("/web/").Handler(http.HandlerFunc(GetHtmlConfigHandler))
systemRouter.Methods("GET").PathPrefix("/metrics/").Handler(http.HandlerFunc(GetStatsHandler))
@ -27,10 +27,10 @@ func (provider *WebProvider) Provide(configurationChan chan <- *Configuration) {
configuration := new(Configuration)
b, _ := ioutil.ReadAll(r.Body)
err := json.Unmarshal(b, configuration)
if (err == nil) {
if err == nil {
configurationChan <- configuration
GetConfigHandler(rw, r)
}else {
} else {
log.Error("Error parsing configuration %+v\n", err)
http.Error(rw, fmt.Sprintf("%+v", err), http.StatusBadRequest)
}
@ -45,7 +45,7 @@ func GetConfigHandler(rw http.ResponseWriter, r *http.Request) {
}
func GetHtmlConfigHandler(response http.ResponseWriter, request *http.Request) {
templatesRenderer.HTML(response, http.StatusOK, "configuration", Page{Configuration:*currentConfiguration})
templatesRenderer.HTML(response, http.StatusOK, "configuration", Page{Configuration: *currentConfiguration})
}
func GetStatsHandler(rw http.ResponseWriter, r *http.Request) {