Main file refactoring, extract a Server object
This commit is contained in:
emile
parent
b906e9361f
commit
a0b15a0efd
5 changed files with 416 additions and 353 deletions
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@ -35,7 +35,7 @@ func notFoundHandler(w http.ResponseWriter, r *http.Request) {
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}
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// LoadDefaultConfig returns a default gorrilla.mux router from the specified configuration.
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func LoadDefaultConfig(globalConfiguration *GlobalConfiguration) *mux.Router {
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func LoadDefaultConfig(globalConfiguration GlobalConfiguration) *mux.Router {
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router := mux.NewRouter()
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router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
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return router
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@ -146,4 +146,8 @@ import:
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ref: d8a3071799b98cacd30b6da92f536050ccfe6da4
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- package: github.com/golang/glog
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ref: fca8c8854093a154ff1eb580aae10276ad6b1b5f
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- package: github.com/spf13/cast
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version: ee7b3e0353166ab1f3a605294ac8cd2b77953778
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- package: github.com/spf13/viper
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version: a212099cbe6fbe8d07476bfda8d2d39b6ff8f325
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369
server.go
Normal file
369
server.go
Normal file
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@ -0,0 +1,369 @@
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/*
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Copyright
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*/
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package main
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import (
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"crypto/tls"
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"errors"
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log "github.com/Sirupsen/logrus"
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"github.com/codegangsta/negroni"
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"github.com/emilevauge/traefik/middlewares"
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"github.com/emilevauge/traefik/provider"
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"github.com/emilevauge/traefik/types"
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"github.com/gorilla/mux"
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"github.com/mailgun/manners"
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"github.com/mailgun/oxy/cbreaker"
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"github.com/mailgun/oxy/forward"
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"github.com/mailgun/oxy/roundrobin"
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"net/http"
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"net/url"
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"os"
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"os/signal"
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"reflect"
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"sync"
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"syscall"
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"time"
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)
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// Server is the reverse-proxy/load-balancer engine
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type Server struct {
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srv *manners.GracefulServer
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configurationRouter *mux.Router
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configurationChan chan types.ConfigMessage
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configurationChanValidated chan types.ConfigMessage
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sigs chan os.Signal
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stopChan chan bool
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providers []provider.Provider
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serverLock sync.Mutex
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currentConfigurations configs
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globalConfiguration GlobalConfiguration
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loggerMiddleware *middlewares.Logger
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}
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// NewServer returns an initialized Server.
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func NewServer(globalConfiguration GlobalConfiguration) *Server {
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server := new(Server)
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server.configurationChan = make(chan types.ConfigMessage, 10)
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server.configurationChanValidated = make(chan types.ConfigMessage, 10)
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server.sigs = make(chan os.Signal, 1)
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server.stopChan = make(chan bool)
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server.providers = []provider.Provider{}
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signal.Notify(server.sigs, syscall.SIGINT, syscall.SIGTERM)
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server.currentConfigurations = make(configs)
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server.globalConfiguration = globalConfiguration
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server.loggerMiddleware = middlewares.NewLogger(globalConfiguration.AccessLogsFile)
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return server
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}
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// Start starts the server and blocks until server is shutted down.
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func (server *Server) Start() {
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server.configurationRouter = LoadDefaultConfig(server.globalConfiguration)
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go server.listenProviders()
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go server.enableRouter()
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server.configureProviders()
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server.startProviders()
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go server.listenSignals()
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var er error
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server.serverLock.Lock()
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server.srv, er = server.prepareServer(server.configurationRouter, server.globalConfiguration, nil, server.loggerMiddleware, metrics)
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if er != nil {
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log.Fatal("Error preparing server: ", er)
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}
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go server.startServer(server.srv, server.globalConfiguration)
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//TODO change that!
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time.Sleep(100 * time.Millisecond)
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server.serverLock.Unlock()
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<-server.stopChan
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}
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// Stop stops the server
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func (server *Server) Stop() {
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server.srv.Close()
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server.stopChan <- true
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}
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// Close destroys the server
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func (server *Server) Close() {
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defer close(server.configurationChan)
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defer close(server.configurationChanValidated)
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defer close(server.sigs)
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defer close(server.stopChan)
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defer server.loggerMiddleware.Close()
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}
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func (server *Server) listenProviders() {
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lastReceivedConfiguration := time.Unix(0, 0)
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lastConfigs := make(map[string]*types.ConfigMessage)
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for {
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configMsg := <-server.configurationChan
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log.Infof("Configuration receveived from provider %s: %#v", configMsg.ProviderName, configMsg.Configuration)
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lastConfigs[configMsg.ProviderName] = &configMsg
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if time.Now().After(lastReceivedConfiguration.Add(time.Duration(server.globalConfiguration.ProvidersThrottleDuration))) {
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log.Infof("Last %s config received more than %s, OK", configMsg.ProviderName, server.globalConfiguration.ProvidersThrottleDuration)
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// last config received more than n s ago
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server.configurationChanValidated <- configMsg
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} else {
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log.Infof("Last %s config received less than %s, waiting...", configMsg.ProviderName, server.globalConfiguration.ProvidersThrottleDuration)
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go func() {
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<-time.After(server.globalConfiguration.ProvidersThrottleDuration)
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if time.Now().After(lastReceivedConfiguration.Add(time.Duration(server.globalConfiguration.ProvidersThrottleDuration))) {
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log.Infof("Waited for %s config, OK", configMsg.ProviderName)
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server.configurationChanValidated <- *lastConfigs[configMsg.ProviderName]
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}
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}()
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}
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lastReceivedConfiguration = time.Now()
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}
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}
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func (server *Server) enableRouter() {
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for {
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configMsg := <-server.configurationChanValidated
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if configMsg.Configuration == nil {
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log.Info("Skipping empty Configuration")
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} else if reflect.DeepEqual(server.currentConfigurations[configMsg.ProviderName], configMsg.Configuration) {
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log.Info("Skipping same configuration")
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} else {
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// Copy configurations to new map so we don't change current if LoadConfig fails
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newConfigurations := make(configs)
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for k, v := range server.currentConfigurations {
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newConfigurations[k] = v
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}
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newConfigurations[configMsg.ProviderName] = configMsg.Configuration
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newConfigurationRouter, err := server.loadConfig(newConfigurations, server.globalConfiguration)
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if err == nil {
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server.serverLock.Lock()
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server.currentConfigurations = newConfigurations
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server.configurationRouter = newConfigurationRouter
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oldServer := server.srv
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newsrv, err := server.prepareServer(server.configurationRouter, server.globalConfiguration, oldServer, server.loggerMiddleware, metrics)
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if err != nil {
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log.Fatal("Error preparing server: ", err)
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}
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go server.startServer(newsrv, server.globalConfiguration)
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server.srv = newsrv
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time.Sleep(1 * time.Second)
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if oldServer != nil {
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log.Info("Stopping old server")
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oldServer.Close()
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}
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server.serverLock.Unlock()
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} else {
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log.Error("Error loading new configuration, aborted ", err)
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}
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}
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}
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}
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func (server *Server) configureProviders() {
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// configure providers
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if server.globalConfiguration.Docker != nil {
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server.providers = append(server.providers, server.globalConfiguration.Docker)
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}
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if server.globalConfiguration.Marathon != nil {
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server.providers = append(server.providers, server.globalConfiguration.Marathon)
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}
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if server.globalConfiguration.File != nil {
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if len(server.globalConfiguration.File.Filename) == 0 {
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// no filename, setting to global config file
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server.globalConfiguration.File.Filename = *globalConfigFile
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}
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server.providers = append(server.providers, server.globalConfiguration.File)
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}
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if server.globalConfiguration.Web != nil {
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server.globalConfiguration.Web.server = server
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server.providers = append(server.providers, server.globalConfiguration.Web)
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}
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if server.globalConfiguration.Consul != nil {
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server.providers = append(server.providers, server.globalConfiguration.Consul)
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}
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if server.globalConfiguration.Etcd != nil {
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server.providers = append(server.providers, server.globalConfiguration.Etcd)
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}
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if server.globalConfiguration.Zookeeper != nil {
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server.providers = append(server.providers, server.globalConfiguration.Zookeeper)
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}
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if server.globalConfiguration.Boltdb != nil {
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server.providers = append(server.providers, server.globalConfiguration.Boltdb)
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}
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}
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func (server *Server) startProviders() {
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// start providers
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for _, provider := range server.providers {
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log.Infof("Starting provider %v %+v", reflect.TypeOf(provider), provider)
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currentProvider := provider
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go func() {
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err := currentProvider.Provide(server.configurationChan)
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if err != nil {
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log.Errorf("Error starting provider %s", err)
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}
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}()
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}
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}
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func (server *Server) listenSignals() {
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sig := <-server.sigs
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log.Infof("I have to go... %+v", sig)
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log.Info("Stopping server")
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server.Stop()
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}
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// creates a TLS config that allows terminating HTTPS for multiple domains using SNI
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func (server *Server) createTLSConfig(certs []Certificate) (*tls.Config, error) {
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if len(certs) == 0 {
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return nil, nil
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}
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config := &tls.Config{}
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if config.NextProtos == nil {
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config.NextProtos = []string{"http/1.1"}
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}
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var err error
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config.Certificates = make([]tls.Certificate, len(certs))
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for i, v := range certs {
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config.Certificates[i], err = tls.LoadX509KeyPair(v.CertFile, v.KeyFile)
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if err != nil {
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return nil, err
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}
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}
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// BuildNameToCertificate parses the CommonName and SubjectAlternateName fields
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// in each certificate and populates the config.NameToCertificate map.
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config.BuildNameToCertificate()
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return config, nil
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}
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func (server *Server) startServer(srv *manners.GracefulServer, globalConfiguration GlobalConfiguration) {
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log.Info("Starting server")
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if srv.TLSConfig != nil {
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err := srv.ListenAndServeTLSWithConfig(srv.TLSConfig)
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if err != nil {
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log.Fatal("Error creating server: ", err)
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}
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} else {
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err := srv.ListenAndServe()
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if err != nil {
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log.Fatal("Error creating server: ", err)
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}
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}
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log.Info("Server stopped")
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}
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func (server *Server) prepareServer(router *mux.Router, globalConfiguration GlobalConfiguration, oldServer *manners.GracefulServer, middlewares ...negroni.Handler) (*manners.GracefulServer, error) {
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log.Info("Preparing server")
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// middlewares
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var negroni = negroni.New()
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for _, middleware := range middlewares {
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negroni.Use(middleware)
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}
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negroni.UseHandler(router)
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tlsConfig, err := server.createTLSConfig(globalConfiguration.Certificates)
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if err != nil {
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log.Fatalf("Error creating TLS config %s", err)
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return nil, err
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}
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if oldServer == nil {
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return manners.NewWithServer(
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&http.Server{
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Addr: globalConfiguration.Port,
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Handler: negroni,
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TLSConfig: tlsConfig,
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}), nil
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}
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gracefulServer, err := oldServer.HijackListener(&http.Server{
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Addr: globalConfiguration.Port,
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Handler: negroni,
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TLSConfig: tlsConfig,
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}, tlsConfig)
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if err != nil {
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log.Fatalf("Error hijacking server %s", err)
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return nil, err
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}
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return gracefulServer, nil
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}
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// LoadConfig returns a new gorilla.mux Route from the specified global configuration and the dynamic
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// provider configurations.
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func (server *Server) loadConfig(configurations configs, globalConfiguration GlobalConfiguration) (*mux.Router, error) {
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router := mux.NewRouter()
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router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
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backends := map[string]http.Handler{}
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for _, configuration := range configurations {
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for frontendName, frontend := range configuration.Frontends {
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log.Debugf("Creating frontend %s", frontendName)
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fwd, _ := forward.New(forward.Logger(oxyLogger), forward.PassHostHeader(frontend.PassHostHeader))
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newRoute := router.NewRoute().Name(frontendName)
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for routeName, route := range frontend.Routes {
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log.Debugf("Creating route %s %s:%s", routeName, route.Rule, route.Value)
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newRouteReflect, err := invoke(newRoute, route.Rule, route.Value)
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if err != nil {
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return nil, err
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}
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newRoute = newRouteReflect[0].Interface().(*mux.Route)
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}
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if backends[frontend.Backend] == nil {
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log.Debugf("Creating backend %s", frontend.Backend)
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var lb http.Handler
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rr, _ := roundrobin.New(fwd)
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if configuration.Backends[frontend.Backend] == nil {
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return nil, errors.New("Backend not found: " + frontend.Backend)
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}
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lbMethod, err := types.NewLoadBalancerMethod(configuration.Backends[frontend.Backend].LoadBalancer)
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if err != nil {
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configuration.Backends[frontend.Backend].LoadBalancer = &types.LoadBalancer{Method: "wrr"}
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}
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switch lbMethod {
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case types.Drr:
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log.Infof("Creating load-balancer drr")
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rebalancer, _ := roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger))
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lb = rebalancer
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for serverName, server := range configuration.Backends[frontend.Backend].Servers {
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url, err := url.Parse(server.URL)
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if err != nil {
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return nil, err
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}
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log.Infof("Creating server %s %s", serverName, url.String())
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rebalancer.UpsertServer(url, roundrobin.Weight(server.Weight))
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}
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case types.Wrr:
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log.Infof("Creating load-balancer wrr")
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lb = middlewares.NewWebsocketUpgrader(rr)
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for serverName, server := range configuration.Backends[frontend.Backend].Servers {
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url, err := url.Parse(server.URL)
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if err != nil {
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return nil, err
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}
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log.Infof("Creating server %s %s", serverName, url.String())
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rr.UpsertServer(url, roundrobin.Weight(server.Weight))
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}
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}
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var negroni = negroni.New()
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if configuration.Backends[frontend.Backend].CircuitBreaker != nil {
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log.Infof("Creating circuit breaker %s", configuration.Backends[frontend.Backend].CircuitBreaker.Expression)
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negroni.Use(middlewares.NewCircuitBreaker(lb, configuration.Backends[frontend.Backend].CircuitBreaker.Expression, cbreaker.Logger(oxyLogger)))
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} else {
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negroni.UseHandler(lb)
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}
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backends[frontend.Backend] = negroni
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} else {
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log.Infof("Reusing backend %s", frontend.Backend)
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}
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// stream.New(backends[frontend.Backend], stream.Retry("IsNetworkError() && Attempts() <= " + strconv.Itoa(globalConfiguration.Replay)), stream.Logger(oxyLogger))
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newRoute.Handler(backends[frontend.Backend])
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err := newRoute.GetError()
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if err != nil {
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log.Errorf("Error building route: %s", err)
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}
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}
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}
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return router, nil
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}
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317
traefik.go
317
traefik.go
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@ -1,38 +1,22 @@
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package main
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import (
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"crypto/tls"
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"errors"
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fmtlog "log"
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"net/http"
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"net/url"
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"os"
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"os/signal"
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"reflect"
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"runtime"
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"strings"
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"syscall"
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"time"
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log "github.com/Sirupsen/logrus"
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"github.com/codegangsta/negroni"
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"github.com/emilevauge/traefik/middlewares"
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"github.com/emilevauge/traefik/provider"
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"github.com/emilevauge/traefik/types"
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"github.com/gorilla/mux"
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"github.com/mailgun/manners"
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"github.com/mailgun/oxy/cbreaker"
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"github.com/mailgun/oxy/forward"
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"github.com/mailgun/oxy/roundrobin"
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"github.com/thoas/stats"
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"gopkg.in/alecthomas/kingpin.v2"
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"sync"
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)
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var (
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globalConfigFile = kingpin.Arg("conf", "Main configration file.").Default("traefik.toml").String()
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version = kingpin.Flag("version", "Get Version.").Short('v').Bool()
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currentConfigurations = make(configs)
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metrics = stats.New()
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oxyLogger = &OxyLogger{}
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)
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@ -42,19 +26,6 @@ func main() {
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kingpin.Version(Version + " built on the " + BuildDate)
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kingpin.Parse()
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fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
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var srv *manners.GracefulServer
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var configurationRouter *mux.Router
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var configurationChan = make(chan types.ConfigMessage, 10)
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defer close(configurationChan)
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var configurationChanValidated = make(chan types.ConfigMessage, 10)
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defer close(configurationChanValidated)
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var sigs = make(chan os.Signal, 1)
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defer close(sigs)
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var stopChan = make(chan bool)
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defer close(stopChan)
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var providers = []provider.Provider{}
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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var serverLock sync.Mutex
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// load global configuration
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globalConfiguration := LoadFileConfig(*globalConfigFile)
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|
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@ -82,294 +53,12 @@ func main() {
|
|||
log.SetFormatter(&log.TextFormatter{FullTimestamp: true, DisableSorting: true})
|
||||
}
|
||||
log.Debugf("Global configuration loaded %+v", globalConfiguration)
|
||||
configurationRouter = LoadDefaultConfig(globalConfiguration)
|
||||
|
||||
// listen new configurations from providers
|
||||
go func() {
|
||||
lastReceivedConfiguration := time.Unix(0, 0)
|
||||
lastConfigs := make(map[string]*types.ConfigMessage)
|
||||
for {
|
||||
configMsg := <-configurationChan
|
||||
log.Infof("Configuration receveived from provider %s: %#v", configMsg.ProviderName, configMsg.Configuration)
|
||||
lastConfigs[configMsg.ProviderName] = &configMsg
|
||||
if time.Now().After(lastReceivedConfiguration.Add(time.Duration(globalConfiguration.ProvidersThrottleDuration))) {
|
||||
log.Infof("Last %s config received more than %s, OK", configMsg.ProviderName, globalConfiguration.ProvidersThrottleDuration)
|
||||
// last config received more than n s ago
|
||||
configurationChanValidated <- configMsg
|
||||
} else {
|
||||
log.Infof("Last %s config received less than %s, waiting...", configMsg.ProviderName, globalConfiguration.ProvidersThrottleDuration)
|
||||
go func() {
|
||||
<-time.After(globalConfiguration.ProvidersThrottleDuration)
|
||||
if time.Now().After(lastReceivedConfiguration.Add(time.Duration(globalConfiguration.ProvidersThrottleDuration))) {
|
||||
log.Infof("Waited for %s config, OK", configMsg.ProviderName)
|
||||
configurationChanValidated <- *lastConfigs[configMsg.ProviderName]
|
||||
}
|
||||
}()
|
||||
}
|
||||
lastReceivedConfiguration = time.Now()
|
||||
}
|
||||
}()
|
||||
go func() {
|
||||
for {
|
||||
configMsg := <-configurationChanValidated
|
||||
if configMsg.Configuration == nil {
|
||||
log.Info("Skipping empty Configuration")
|
||||
} else if reflect.DeepEqual(currentConfigurations[configMsg.ProviderName], configMsg.Configuration) {
|
||||
log.Info("Skipping same configuration")
|
||||
} else {
|
||||
// Copy configurations to new map so we don't change current if LoadConfig fails
|
||||
newConfigurations := make(configs)
|
||||
for k, v := range currentConfigurations {
|
||||
newConfigurations[k] = v
|
||||
}
|
||||
newConfigurations[configMsg.ProviderName] = configMsg.Configuration
|
||||
|
||||
newConfigurationRouter, err := LoadConfig(newConfigurations, globalConfiguration)
|
||||
if err == nil {
|
||||
serverLock.Lock()
|
||||
currentConfigurations = newConfigurations
|
||||
configurationRouter = newConfigurationRouter
|
||||
oldServer := srv
|
||||
newsrv, err := prepareServer(configurationRouter, globalConfiguration, oldServer, loggerMiddleware, metrics)
|
||||
if err != nil {
|
||||
log.Fatal("Error preparing server: ", err)
|
||||
}
|
||||
go startServer(newsrv, globalConfiguration)
|
||||
srv = newsrv
|
||||
time.Sleep(1 * time.Second)
|
||||
if oldServer != nil {
|
||||
log.Info("Stopping old server")
|
||||
oldServer.Close()
|
||||
}
|
||||
serverLock.Unlock()
|
||||
} else {
|
||||
log.Error("Error loading new configuration, aborted ", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
// configure providers
|
||||
if globalConfiguration.Docker != nil {
|
||||
providers = append(providers, globalConfiguration.Docker)
|
||||
}
|
||||
if globalConfiguration.Marathon != nil {
|
||||
providers = append(providers, globalConfiguration.Marathon)
|
||||
}
|
||||
if globalConfiguration.File != nil {
|
||||
if len(globalConfiguration.File.Filename) == 0 {
|
||||
// no filename, setting to global config file
|
||||
globalConfiguration.File.Filename = *globalConfigFile
|
||||
}
|
||||
providers = append(providers, globalConfiguration.File)
|
||||
}
|
||||
if globalConfiguration.Web != nil {
|
||||
providers = append(providers, globalConfiguration.Web)
|
||||
}
|
||||
if globalConfiguration.Consul != nil {
|
||||
providers = append(providers, globalConfiguration.Consul)
|
||||
}
|
||||
if globalConfiguration.Etcd != nil {
|
||||
providers = append(providers, globalConfiguration.Etcd)
|
||||
}
|
||||
if globalConfiguration.Zookeeper != nil {
|
||||
providers = append(providers, globalConfiguration.Zookeeper)
|
||||
}
|
||||
if globalConfiguration.Boltdb != nil {
|
||||
providers = append(providers, globalConfiguration.Boltdb)
|
||||
}
|
||||
|
||||
// start providers
|
||||
for _, provider := range providers {
|
||||
log.Infof("Starting provider %v %+v", reflect.TypeOf(provider), provider)
|
||||
currentProvider := provider
|
||||
go func() {
|
||||
err := currentProvider.Provide(configurationChan)
|
||||
if err != nil {
|
||||
log.Errorf("Error starting provider %s", err)
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
go func() {
|
||||
sig := <-sigs
|
||||
log.Infof("I have to go... %+v", sig)
|
||||
log.Info("Stopping server")
|
||||
srv.Close()
|
||||
stopChan <- true
|
||||
}()
|
||||
|
||||
//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
|
||||
//negroni.Use(middlewares.NewRoutes(configurationRouter))
|
||||
|
||||
var er error
|
||||
serverLock.Lock()
|
||||
srv, er = prepareServer(configurationRouter, globalConfiguration, nil, loggerMiddleware, metrics)
|
||||
if er != nil {
|
||||
log.Fatal("Error preparing server: ", er)
|
||||
}
|
||||
go startServer(srv, globalConfiguration)
|
||||
//TODO change that!
|
||||
time.Sleep(100 * time.Millisecond)
|
||||
serverLock.Unlock()
|
||||
|
||||
<-stopChan
|
||||
server := NewServer(*globalConfiguration)
|
||||
server.Start()
|
||||
server.Close()
|
||||
log.Info("Shutting down")
|
||||
}
|
||||
|
||||
// creates a TLS config that allows terminating HTTPS for multiple domains using SNI
|
||||
func createTLSConfig(certs []Certificate) (*tls.Config, error) {
|
||||
if len(certs) == 0 {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
config := &tls.Config{}
|
||||
if config.NextProtos == nil {
|
||||
config.NextProtos = []string{"http/1.1"}
|
||||
}
|
||||
|
||||
var err error
|
||||
config.Certificates = make([]tls.Certificate, len(certs))
|
||||
for i, v := range certs {
|
||||
config.Certificates[i], err = tls.LoadX509KeyPair(v.CertFile, v.KeyFile)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
// BuildNameToCertificate parses the CommonName and SubjectAlternateName fields
|
||||
// in each certificate and populates the config.NameToCertificate map.
|
||||
config.BuildNameToCertificate()
|
||||
return config, nil
|
||||
}
|
||||
|
||||
func startServer(srv *manners.GracefulServer, globalConfiguration *GlobalConfiguration) {
|
||||
log.Info("Starting server")
|
||||
if srv.TLSConfig != nil {
|
||||
err := srv.ListenAndServeTLSWithConfig(srv.TLSConfig)
|
||||
if err != nil {
|
||||
log.Fatal("Error creating server: ", err)
|
||||
}
|
||||
} else {
|
||||
err := srv.ListenAndServe()
|
||||
if err != nil {
|
||||
log.Fatal("Error creating server: ", err)
|
||||
}
|
||||
}
|
||||
log.Info("Server stopped")
|
||||
}
|
||||
|
||||
func prepareServer(router *mux.Router, globalConfiguration *GlobalConfiguration, oldServer *manners.GracefulServer, middlewares ...negroni.Handler) (*manners.GracefulServer, error) {
|
||||
log.Info("Preparing server")
|
||||
// middlewares
|
||||
var negroni = negroni.New()
|
||||
for _, middleware := range middlewares {
|
||||
negroni.Use(middleware)
|
||||
}
|
||||
negroni.UseHandler(router)
|
||||
tlsConfig, err := createTLSConfig(globalConfiguration.Certificates)
|
||||
if err != nil {
|
||||
log.Fatalf("Error creating TLS config %s", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if oldServer == nil {
|
||||
return manners.NewWithServer(
|
||||
&http.Server{
|
||||
Addr: globalConfiguration.Port,
|
||||
Handler: negroni,
|
||||
TLSConfig: tlsConfig,
|
||||
}), nil
|
||||
}
|
||||
server, err := oldServer.HijackListener(&http.Server{
|
||||
Addr: globalConfiguration.Port,
|
||||
Handler: negroni,
|
||||
TLSConfig: tlsConfig,
|
||||
}, tlsConfig)
|
||||
if err != nil {
|
||||
log.Fatalf("Error hijacking server %s", err)
|
||||
return nil, err
|
||||
}
|
||||
return server, nil
|
||||
}
|
||||
|
||||
// LoadConfig returns a new gorrilla.mux Route from the specified global configuration and the dynamic
|
||||
// provider configurations.
|
||||
func LoadConfig(configurations configs, globalConfiguration *GlobalConfiguration) (*mux.Router, error) {
|
||||
router := mux.NewRouter()
|
||||
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
|
||||
backends := map[string]http.Handler{}
|
||||
for _, configuration := range configurations {
|
||||
for frontendName, frontend := range configuration.Frontends {
|
||||
log.Debugf("Creating frontend %s", frontendName)
|
||||
fwd, _ := forward.New(forward.Logger(oxyLogger), forward.PassHostHeader(frontend.PassHostHeader))
|
||||
newRoute := router.NewRoute().Name(frontendName)
|
||||
for routeName, route := range frontend.Routes {
|
||||
log.Debugf("Creating route %s %s:%s", routeName, route.Rule, route.Value)
|
||||
newRouteReflect, err := invoke(newRoute, route.Rule, route.Value)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
newRoute = newRouteReflect[0].Interface().(*mux.Route)
|
||||
}
|
||||
if backends[frontend.Backend] == nil {
|
||||
log.Debugf("Creating backend %s", frontend.Backend)
|
||||
var lb http.Handler
|
||||
rr, _ := roundrobin.New(fwd)
|
||||
if configuration.Backends[frontend.Backend] == nil {
|
||||
return nil, errors.New("Backend not found: " + frontend.Backend)
|
||||
}
|
||||
lbMethod, err := types.NewLoadBalancerMethod(configuration.Backends[frontend.Backend].LoadBalancer)
|
||||
if err != nil {
|
||||
configuration.Backends[frontend.Backend].LoadBalancer = &types.LoadBalancer{Method: "wrr"}
|
||||
}
|
||||
switch lbMethod {
|
||||
case types.Drr:
|
||||
log.Infof("Creating load-balancer drr")
|
||||
rebalancer, _ := roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger))
|
||||
lb = rebalancer
|
||||
for serverName, server := range configuration.Backends[frontend.Backend].Servers {
|
||||
url, err := url.Parse(server.URL)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
log.Infof("Creating server %s %s", serverName, url.String())
|
||||
rebalancer.UpsertServer(url, roundrobin.Weight(server.Weight))
|
||||
}
|
||||
case types.Wrr:
|
||||
log.Infof("Creating load-balancer wrr")
|
||||
lb = middlewares.NewWebsocketUpgrader(rr)
|
||||
for serverName, server := range configuration.Backends[frontend.Backend].Servers {
|
||||
url, err := url.Parse(server.URL)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
log.Infof("Creating server %s %s", serverName, url.String())
|
||||
rr.UpsertServer(url, roundrobin.Weight(server.Weight))
|
||||
}
|
||||
}
|
||||
var negroni = negroni.New()
|
||||
if configuration.Backends[frontend.Backend].CircuitBreaker != nil {
|
||||
log.Infof("Creating circuit breaker %s", configuration.Backends[frontend.Backend].CircuitBreaker.Expression)
|
||||
negroni.Use(middlewares.NewCircuitBreaker(lb, configuration.Backends[frontend.Backend].CircuitBreaker.Expression, cbreaker.Logger(oxyLogger)))
|
||||
} else {
|
||||
negroni.UseHandler(lb)
|
||||
}
|
||||
backends[frontend.Backend] = negroni
|
||||
} else {
|
||||
log.Infof("Reusing backend %s", frontend.Backend)
|
||||
}
|
||||
// stream.New(backends[frontend.Backend], stream.Retry("IsNetworkError() && Attempts() <= " + strconv.Itoa(globalConfiguration.Replay)), stream.Logger(oxyLogger))
|
||||
|
||||
newRoute.Handler(backends[frontend.Backend])
|
||||
err := newRoute.GetError()
|
||||
if err != nil {
|
||||
log.Errorf("Error building route: %s", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
return router, nil
|
||||
}
|
||||
|
||||
// Invoke calls the specified method with the specified arguments on the specified interface.
|
||||
// It uses the go(lang) reflect package.
|
||||
func invoke(any interface{}, name string, args ...interface{}) ([]reflect.Value, error) {
|
||||
|
|
|
|||
69
web.go
69
web.go
|
|
@ -20,6 +20,7 @@ type WebProvider struct {
|
|||
Address string
|
||||
CertFile, KeyFile string
|
||||
ReadOnly bool
|
||||
server *Server
|
||||
}
|
||||
|
||||
var (
|
||||
|
|
@ -34,12 +35,12 @@ func (provider *WebProvider) Provide(configurationChan chan<- types.ConfigMessag
|
|||
systemRouter := mux.NewRouter()
|
||||
|
||||
// health route
|
||||
systemRouter.Methods("GET").Path("/health").HandlerFunc(getHealthHandler)
|
||||
systemRouter.Methods("GET").Path("/health").HandlerFunc(provider.getHealthHandler)
|
||||
|
||||
// API routes
|
||||
systemRouter.Methods("GET").Path("/api").HandlerFunc(getConfigHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers").HandlerFunc(getConfigHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}").HandlerFunc(getProviderHandler)
|
||||
systemRouter.Methods("GET").Path("/api").HandlerFunc(provider.getConfigHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers").HandlerFunc(provider.getConfigHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}").HandlerFunc(provider.getProviderHandler)
|
||||
systemRouter.Methods("PUT").Path("/api/providers/{provider}").HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
|
||||
if provider.ReadOnly {
|
||||
response.WriteHeader(http.StatusForbidden)
|
||||
|
|
@ -58,20 +59,20 @@ func (provider *WebProvider) Provide(configurationChan chan<- types.ConfigMessag
|
|||
err := json.Unmarshal(body, configuration)
|
||||
if err == nil {
|
||||
configurationChan <- types.ConfigMessage{"web", configuration}
|
||||
getConfigHandler(response, request)
|
||||
provider.getConfigHandler(response, request)
|
||||
} else {
|
||||
log.Errorf("Error parsing configuration %+v", err)
|
||||
http.Error(response, fmt.Sprintf("%+v", err), http.StatusBadRequest)
|
||||
}
|
||||
})
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends").HandlerFunc(getBackendsHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}").HandlerFunc(getBackendHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers").HandlerFunc(getServersHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers/{server}").HandlerFunc(getServerHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends").HandlerFunc(getFrontendsHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}").HandlerFunc(getFrontendHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes").HandlerFunc(getRoutesHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes/{route}").HandlerFunc(getRouteHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends").HandlerFunc(provider.getBackendsHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}").HandlerFunc(provider.getBackendHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers").HandlerFunc(provider.getServersHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers/{server}").HandlerFunc(provider.getServerHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends").HandlerFunc(provider.getFrontendsHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}").HandlerFunc(provider.getFrontendHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes").HandlerFunc(provider.getRoutesHandler)
|
||||
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes/{route}").HandlerFunc(provider.getRouteHandler)
|
||||
|
||||
// Expose dashboard
|
||||
systemRouter.Methods("GET").Path("/").HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
|
||||
|
|
@ -95,39 +96,39 @@ func (provider *WebProvider) Provide(configurationChan chan<- types.ConfigMessag
|
|||
return nil
|
||||
}
|
||||
|
||||
func getHealthHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getHealthHandler(response http.ResponseWriter, request *http.Request) {
|
||||
templatesRenderer.JSON(response, http.StatusOK, metrics.Data())
|
||||
}
|
||||
|
||||
func getConfigHandler(response http.ResponseWriter, request *http.Request) {
|
||||
templatesRenderer.JSON(response, http.StatusOK, currentConfigurations)
|
||||
func (provider *WebProvider) getConfigHandler(response http.ResponseWriter, request *http.Request) {
|
||||
templatesRenderer.JSON(response, http.StatusOK, provider.server.currentConfigurations)
|
||||
}
|
||||
|
||||
func getProviderHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getProviderHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, provider)
|
||||
} else {
|
||||
http.NotFound(response, request)
|
||||
}
|
||||
}
|
||||
|
||||
func getBackendsHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getBackendsHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, provider.Backends)
|
||||
} else {
|
||||
http.NotFound(response, request)
|
||||
}
|
||||
}
|
||||
|
||||
func getBackendHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getBackendHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
backendID := vars["backend"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
if backend, ok := provider.Backends[backendID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, backend)
|
||||
return
|
||||
|
|
@ -136,11 +137,11 @@ func getBackendHandler(response http.ResponseWriter, request *http.Request) {
|
|||
http.NotFound(response, request)
|
||||
}
|
||||
|
||||
func getServersHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getServersHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
backendID := vars["backend"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
if backend, ok := provider.Backends[backendID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, backend.Servers)
|
||||
return
|
||||
|
|
@ -149,12 +150,12 @@ func getServersHandler(response http.ResponseWriter, request *http.Request) {
|
|||
http.NotFound(response, request)
|
||||
}
|
||||
|
||||
func getServerHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getServerHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
backendID := vars["backend"]
|
||||
serverID := vars["server"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
if backend, ok := provider.Backends[backendID]; ok {
|
||||
if server, ok := backend.Servers[serverID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, server)
|
||||
|
|
@ -165,21 +166,21 @@ func getServerHandler(response http.ResponseWriter, request *http.Request) {
|
|||
http.NotFound(response, request)
|
||||
}
|
||||
|
||||
func getFrontendsHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getFrontendsHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, provider.Frontends)
|
||||
} else {
|
||||
http.NotFound(response, request)
|
||||
}
|
||||
}
|
||||
|
||||
func getFrontendHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getFrontendHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
frontendID := vars["frontend"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
if frontend, ok := provider.Frontends[frontendID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, frontend)
|
||||
return
|
||||
|
|
@ -188,11 +189,11 @@ func getFrontendHandler(response http.ResponseWriter, request *http.Request) {
|
|||
http.NotFound(response, request)
|
||||
}
|
||||
|
||||
func getRoutesHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getRoutesHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
frontendID := vars["frontend"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
if frontend, ok := provider.Frontends[frontendID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, frontend.Routes)
|
||||
return
|
||||
|
|
@ -201,12 +202,12 @@ func getRoutesHandler(response http.ResponseWriter, request *http.Request) {
|
|||
http.NotFound(response, request)
|
||||
}
|
||||
|
||||
func getRouteHandler(response http.ResponseWriter, request *http.Request) {
|
||||
func (provider *WebProvider) getRouteHandler(response http.ResponseWriter, request *http.Request) {
|
||||
vars := mux.Vars(request)
|
||||
providerID := vars["provider"]
|
||||
frontendID := vars["frontend"]
|
||||
routeID := vars["route"]
|
||||
if provider, ok := currentConfigurations[providerID]; ok {
|
||||
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
|
||||
if frontend, ok := provider.Frontends[frontendID]; ok {
|
||||
if route, ok := frontend.Routes[routeID]; ok {
|
||||
templatesRenderer.JSON(response, http.StatusOK, route)
|
||||
|
|
|
|||
Loading…
Reference in a new issue