Extract some code in packages
- This will help split stuff in smaller, better tested packages - This moves some stuff like the traefik command to package `cmd` Signed-off-by: Vincent Demeester <vincent@sbr.pm>
This commit is contained in:
Vincent Demeester
parent
9c9015a7b1
commit
7fcb7b86d3
12 changed files with 41 additions and 40 deletions
870
server/server.go
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870
server/server.go
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@ -0,0 +1,870 @@
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package server
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"encoding/json"
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"errors"
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"io/ioutil"
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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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"regexp"
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"sort"
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"sync"
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"syscall"
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"time"
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"github.com/codegangsta/negroni"
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"github.com/containous/mux"
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"github.com/containous/traefik/cluster"
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"github.com/containous/traefik/healthcheck"
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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"
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"github.com/containous/traefik/safe"
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"github.com/containous/traefik/types"
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"github.com/streamrail/concurrent-map"
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"github.com/vulcand/oxy/cbreaker"
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"github.com/vulcand/oxy/connlimit"
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"github.com/vulcand/oxy/forward"
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"github.com/vulcand/oxy/roundrobin"
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"github.com/vulcand/oxy/utils"
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)
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var oxyLogger = &OxyLogger{}
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// Server is the reverse-proxy/load-balancer engine
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type Server struct {
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serverEntryPoints serverEntryPoints
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configurationChan chan types.ConfigMessage
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configurationValidatedChan chan types.ConfigMessage
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signals chan os.Signal
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stopChan chan bool
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providers []provider.Provider
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currentConfigurations safe.Safe
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globalConfiguration GlobalConfiguration
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loggerMiddleware *middlewares.Logger
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routinesPool *safe.Pool
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leadership *cluster.Leadership
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}
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type serverEntryPoints map[string]*serverEntryPoint
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type serverEntryPoint struct {
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httpServer *http.Server
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httpRouter *middlewares.HandlerSwitcher
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}
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type serverRoute struct {
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route *mux.Route
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stripPrefixes []string
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addPrefix string
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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.serverEntryPoints = make(map[string]*serverEntryPoint)
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server.configurationChan = make(chan types.ConfigMessage, 100)
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server.configurationValidatedChan = make(chan types.ConfigMessage, 100)
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server.signals = make(chan os.Signal, 1)
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server.stopChan = make(chan bool, 1)
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server.providers = []provider.Provider{}
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signal.Notify(server.signals, syscall.SIGINT, syscall.SIGTERM)
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currentConfigurations := make(configs)
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server.currentConfigurations.Set(currentConfigurations)
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server.globalConfiguration = globalConfiguration
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server.loggerMiddleware = middlewares.NewLogger(globalConfiguration.AccessLogsFile)
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server.routinesPool = safe.NewPool(context.Background())
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if globalConfiguration.Cluster != nil {
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// leadership creation if cluster mode
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server.leadership = cluster.NewLeadership(server.routinesPool.Ctx(), globalConfiguration.Cluster)
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}
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return server
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}
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// Start starts the server.
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func (server *Server) Start() {
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server.startHTTPServers()
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server.startLeadership()
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server.routinesPool.Go(func(stop chan bool) {
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server.listenProviders(stop)
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})
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server.routinesPool.Go(func(stop chan bool) {
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server.listenConfigurations(stop)
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})
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server.configureProviders()
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server.startProviders()
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go server.listenSignals()
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}
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// Wait blocks until server is shutted down.
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func (server *Server) Wait() {
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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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defer log.Info("Server stopped")
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var wg sync.WaitGroup
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for sepn, sep := range server.serverEntryPoints {
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wg.Add(1)
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go func(serverEntryPointName string, serverEntryPoint *serverEntryPoint) {
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defer wg.Done()
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graceTimeOut := time.Duration(server.globalConfiguration.GraceTimeOut)
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ctx, cancel := context.WithTimeout(context.Background(), graceTimeOut)
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log.Debugf("Waiting %s seconds before killing connections on entrypoint %s...", graceTimeOut, serverEntryPointName)
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if err := serverEntryPoint.httpServer.Shutdown(ctx); err != nil {
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log.Debugf("Wait is over due to: %s", err)
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serverEntryPoint.httpServer.Close()
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}
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cancel()
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log.Debugf("Entrypoint %s closed", serverEntryPointName)
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}(sepn, sep)
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}
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wg.Wait()
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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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ctx, cancel := context.WithTimeout(context.Background(), time.Duration(server.globalConfiguration.GraceTimeOut))
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go func(ctx context.Context) {
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<-ctx.Done()
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if ctx.Err() == context.Canceled {
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return
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} else if ctx.Err() == context.DeadlineExceeded {
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log.Warnf("Timeout while stopping traefik, killing instance ✝")
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os.Exit(1)
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}
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}(ctx)
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server.stopLeadership()
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server.routinesPool.Cleanup()
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close(server.configurationChan)
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close(server.configurationValidatedChan)
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signal.Stop(server.signals)
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close(server.signals)
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close(server.stopChan)
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server.loggerMiddleware.Close()
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cancel()
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}
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func (server *Server) startLeadership() {
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if server.leadership != nil {
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server.leadership.Participate(server.routinesPool)
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// server.leadership.AddGoCtx(func(ctx context.Context) {
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// log.Debugf("Started test routine")
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// <-ctx.Done()
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// log.Debugf("Stopped test routine")
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// })
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}
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}
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func (server *Server) stopLeadership() {
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if server.leadership != nil {
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server.leadership.Stop()
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}
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}
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func (server *Server) startHTTPServers() {
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server.serverEntryPoints = server.buildEntryPoints(server.globalConfiguration)
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for newServerEntryPointName, newServerEntryPoint := range server.serverEntryPoints {
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serverMiddlewares := []negroni.Handler{server.loggerMiddleware, metrics}
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if server.globalConfiguration.Web != nil && server.globalConfiguration.Web.Metrics != nil {
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if server.globalConfiguration.Web.Metrics.Prometheus != nil {
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metricsMiddleware := middlewares.NewMetricsWrapper(middlewares.NewPrometheus(newServerEntryPointName, server.globalConfiguration.Web.Metrics.Prometheus))
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serverMiddlewares = append(serverMiddlewares, metricsMiddleware)
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}
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}
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if server.globalConfiguration.Web != nil && server.globalConfiguration.Web.Statistics != nil {
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statsRecorder = middlewares.NewStatsRecorder(server.globalConfiguration.Web.Statistics.RecentErrors)
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serverMiddlewares = append(serverMiddlewares, statsRecorder)
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}
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if server.globalConfiguration.EntryPoints[newServerEntryPointName].Auth != nil {
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authMiddleware, err := middlewares.NewAuthenticator(server.globalConfiguration.EntryPoints[newServerEntryPointName].Auth)
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if err != nil {
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log.Fatal("Error starting server: ", err)
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}
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serverMiddlewares = append(serverMiddlewares, authMiddleware)
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}
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if server.globalConfiguration.EntryPoints[newServerEntryPointName].Compress {
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serverMiddlewares = append(serverMiddlewares, &middlewares.Compress{})
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}
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newsrv, err := server.prepareServer(newServerEntryPointName, newServerEntryPoint.httpRouter, server.globalConfiguration.EntryPoints[newServerEntryPointName], serverMiddlewares...)
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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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serverEntryPoint := server.serverEntryPoints[newServerEntryPointName]
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serverEntryPoint.httpServer = newsrv
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go server.startServer(serverEntryPoint.httpServer, server.globalConfiguration)
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}
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}
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func (server *Server) listenProviders(stop chan bool) {
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lastReceivedConfiguration := safe.New(time.Unix(0, 0))
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lastConfigs := cmap.New()
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for {
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select {
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case <-stop:
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return
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case configMsg, ok := <-server.configurationChan:
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if !ok {
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return
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}
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server.defaultConfigurationValues(configMsg.Configuration)
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currentConfigurations := server.currentConfigurations.Get().(configs)
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jsonConf, _ := json.Marshal(configMsg.Configuration)
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log.Debugf("Configuration received from provider %s: %s", configMsg.ProviderName, string(jsonConf))
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if configMsg.Configuration == nil || configMsg.Configuration.Backends == nil && configMsg.Configuration.Frontends == nil {
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log.Infof("Skipping empty Configuration for provider %s", configMsg.ProviderName)
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} else if reflect.DeepEqual(currentConfigurations[configMsg.ProviderName], configMsg.Configuration) {
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log.Infof("Skipping same configuration for provider %s", configMsg.ProviderName)
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} else {
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lastConfigs.Set(configMsg.ProviderName, &configMsg)
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lastReceivedConfigurationValue := lastReceivedConfiguration.Get().(time.Time)
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providersThrottleDuration := time.Duration(server.globalConfiguration.ProvidersThrottleDuration)
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if time.Now().After(lastReceivedConfigurationValue.Add(providersThrottleDuration)) {
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log.Debugf("Last %s config received more than %s, OK", configMsg.ProviderName, server.globalConfiguration.ProvidersThrottleDuration.String())
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// last config received more than n s ago
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server.configurationValidatedChan <- configMsg
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} else {
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log.Debugf("Last %s config received less than %s, waiting...", configMsg.ProviderName, server.globalConfiguration.ProvidersThrottleDuration.String())
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safe.Go(func() {
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<-time.After(providersThrottleDuration)
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lastReceivedConfigurationValue := lastReceivedConfiguration.Get().(time.Time)
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if time.Now().After(lastReceivedConfigurationValue.Add(time.Duration(providersThrottleDuration))) {
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log.Debugf("Waited for %s config, OK", configMsg.ProviderName)
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if lastConfig, ok := lastConfigs.Get(configMsg.ProviderName); ok {
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server.configurationValidatedChan <- *lastConfig.(*types.ConfigMessage)
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}
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}
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})
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}
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lastReceivedConfiguration.Set(time.Now())
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}
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}
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}
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}
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func (server *Server) defaultConfigurationValues(configuration *types.Configuration) {
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if configuration == nil || configuration.Frontends == nil {
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return
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}
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for _, frontend := range configuration.Frontends {
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// default endpoints if not defined in frontends
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if len(frontend.EntryPoints) == 0 {
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frontend.EntryPoints = server.globalConfiguration.DefaultEntryPoints
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}
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}
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for backendName, backend := range configuration.Backends {
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_, err := types.NewLoadBalancerMethod(backend.LoadBalancer)
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if err != nil {
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log.Debugf("Load balancer method '%+v' for backend %s: %v. Using default wrr.", backend.LoadBalancer, backendName, err)
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backend.LoadBalancer = &types.LoadBalancer{Method: "wrr"}
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}
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}
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}
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func (server *Server) listenConfigurations(stop chan bool) {
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for {
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select {
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case <-stop:
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return
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case configMsg, ok := <-server.configurationValidatedChan:
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if !ok {
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return
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}
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currentConfigurations := server.currentConfigurations.Get().(configs)
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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 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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newServerEntryPoints, err := server.loadConfig(newConfigurations, server.globalConfiguration)
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if err == nil {
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for newServerEntryPointName, newServerEntryPoint := range newServerEntryPoints {
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server.serverEntryPoints[newServerEntryPointName].httpRouter.UpdateHandler(newServerEntryPoint.httpRouter.GetHandler())
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log.Infof("Server configuration reloaded on %s", server.serverEntryPoints[newServerEntryPointName].httpServer.Addr)
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}
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server.currentConfigurations.Set(newConfigurations)
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server.postLoadConfig()
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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) postLoadConfig() {
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if server.globalConfiguration.ACME == nil {
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return
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}
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if server.leadership != nil && !server.leadership.IsLeader() {
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return
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}
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if server.globalConfiguration.ACME.OnHostRule {
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currentConfigurations := server.currentConfigurations.Get().(configs)
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for _, configuration := range currentConfigurations {
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for _, frontend := range configuration.Frontends {
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// check if one of the frontend entrypoints is configured with TLS
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TLSEnabled := false
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for _, entrypoint := range frontend.EntryPoints {
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if server.globalConfiguration.EntryPoints[entrypoint].TLS != nil {
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TLSEnabled = true
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break
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}
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}
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if TLSEnabled {
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for _, route := range frontend.Routes {
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rules := Rules{}
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domains, err := rules.ParseDomains(route.Rule)
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if err != nil {
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log.Errorf("Error parsing domains: %v", err)
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} else {
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server.globalConfiguration.ACME.LoadCertificateForDomains(domains)
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}
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}
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}
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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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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.ConsulCatalog != nil {
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server.providers = append(server.providers, server.globalConfiguration.ConsulCatalog)
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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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if server.globalConfiguration.Kubernetes != nil {
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server.providers = append(server.providers, server.globalConfiguration.Kubernetes)
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}
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if server.globalConfiguration.Mesos != nil {
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server.providers = append(server.providers, server.globalConfiguration.Mesos)
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}
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if server.globalConfiguration.Eureka != nil {
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server.providers = append(server.providers, server.globalConfiguration.Eureka)
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}
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if server.globalConfiguration.ECS != nil {
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server.providers = append(server.providers, server.globalConfiguration.ECS)
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}
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if server.globalConfiguration.Rancher != nil {
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server.providers = append(server.providers, server.globalConfiguration.Rancher)
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}
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if server.globalConfiguration.DynamoDB != nil {
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server.providers = append(server.providers, server.globalConfiguration.DynamoDB)
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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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providerType := reflect.TypeOf(provider)
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jsonConf, _ := json.Marshal(provider)
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log.Infof("Starting provider %v %s", providerType, jsonConf)
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currentProvider := provider
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safe.Go(func() {
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err := currentProvider.Provide(server.configurationChan, server.routinesPool, server.globalConfiguration.Constraints)
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if err != nil {
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log.Errorf("Error starting provider %v: %s", providerType, 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.signals
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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(entryPointName string, tlsOption *TLS, router *middlewares.HandlerSwitcher) (*tls.Config, error) {
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if tlsOption == nil {
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return nil, nil
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}
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config, err := tlsOption.Certificates.CreateTLSConfig()
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if err != nil {
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return nil, err
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}
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// ensure http2 enabled
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config.NextProtos = []string{"h2", "http/1.1"}
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if len(tlsOption.ClientCAFiles) > 0 {
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pool := x509.NewCertPool()
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for _, caFile := range tlsOption.ClientCAFiles {
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data, err := ioutil.ReadFile(caFile)
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if err != nil {
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return nil, err
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}
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ok := pool.AppendCertsFromPEM(data)
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if !ok {
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return nil, errors.New("invalid certificate(s) in " + caFile)
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}
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}
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config.ClientCAs = pool
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config.ClientAuth = tls.RequireAndVerifyClientCert
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}
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if server.globalConfiguration.ACME != nil {
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if _, ok := server.serverEntryPoints[server.globalConfiguration.ACME.EntryPoint]; ok {
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if entryPointName == server.globalConfiguration.ACME.EntryPoint {
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checkOnDemandDomain := func(domain string) bool {
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routeMatch := &mux.RouteMatch{}
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router := router.GetHandler()
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match := router.Match(&http.Request{URL: &url.URL{}, Host: domain}, routeMatch)
|
||||
if match && routeMatch.Route != nil {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
if server.leadership == nil {
|
||||
err := server.globalConfiguration.ACME.CreateLocalConfig(config, checkOnDemandDomain)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
} else {
|
||||
err := server.globalConfiguration.ACME.CreateClusterConfig(server.leadership, config, checkOnDemandDomain)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
return nil, errors.New("Unknown entrypoint " + server.globalConfiguration.ACME.EntryPoint + " for ACME configuration")
|
||||
}
|
||||
}
|
||||
if len(config.Certificates) == 0 {
|
||||
return nil, errors.New("No certificates found for TLS entrypoint " + entryPointName)
|
||||
}
|
||||
// BuildNameToCertificate parses the CommonName and SubjectAlternateName fields
|
||||
// in each certificate and populates the config.NameToCertificate map.
|
||||
config.BuildNameToCertificate()
|
||||
//Set the minimum TLS version if set in the config TOML
|
||||
if minConst, exists := minVersion[server.globalConfiguration.EntryPoints[entryPointName].TLS.MinVersion]; exists {
|
||||
config.PreferServerCipherSuites = true
|
||||
config.MinVersion = minConst
|
||||
}
|
||||
//Set the list of CipherSuites if set in the config TOML
|
||||
if server.globalConfiguration.EntryPoints[entryPointName].TLS.CipherSuites != nil {
|
||||
//if our list of CipherSuites is defined in the entrypoint config, we can re-initilize the suites list as empty
|
||||
config.CipherSuites = make([]uint16, 0)
|
||||
for _, cipher := range server.globalConfiguration.EntryPoints[entryPointName].TLS.CipherSuites {
|
||||
if cipherConst, exists := cipherSuites[cipher]; exists {
|
||||
config.CipherSuites = append(config.CipherSuites, cipherConst)
|
||||
} else {
|
||||
//CipherSuite listed in the toml does not exist in our listed
|
||||
return nil, errors.New("Invalid CipherSuite: " + cipher)
|
||||
}
|
||||
}
|
||||
}
|
||||
return config, nil
|
||||
}
|
||||
|
||||
func (server *Server) startServer(srv *http.Server, globalConfiguration GlobalConfiguration) {
|
||||
log.Infof("Starting server on %s", srv.Addr)
|
||||
var err error
|
||||
if srv.TLSConfig != nil {
|
||||
err = srv.ListenAndServeTLS("", "")
|
||||
} else {
|
||||
err = srv.ListenAndServe()
|
||||
}
|
||||
if err != nil {
|
||||
log.Error("Error creating server: ", err)
|
||||
}
|
||||
}
|
||||
|
||||
func (server *Server) prepareServer(entryPointName string, router *middlewares.HandlerSwitcher, entryPoint *EntryPoint, middlewares ...negroni.Handler) (*http.Server, error) {
|
||||
log.Infof("Preparing server %s %+v", entryPointName, entryPoint)
|
||||
// middlewares
|
||||
var negroni = negroni.New()
|
||||
for _, middleware := range middlewares {
|
||||
negroni.Use(middleware)
|
||||
}
|
||||
negroni.UseHandler(router)
|
||||
tlsConfig, err := server.createTLSConfig(entryPointName, entryPoint.TLS, router)
|
||||
if err != nil {
|
||||
log.Errorf("Error creating TLS config: %s", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &http.Server{
|
||||
Addr: entryPoint.Address,
|
||||
Handler: negroni,
|
||||
TLSConfig: tlsConfig,
|
||||
IdleTimeout: time.Duration(server.globalConfiguration.IdleTimeout),
|
||||
}, nil
|
||||
}
|
||||
|
||||
func (server *Server) buildEntryPoints(globalConfiguration GlobalConfiguration) map[string]*serverEntryPoint {
|
||||
serverEntryPoints := make(map[string]*serverEntryPoint)
|
||||
for entryPointName := range globalConfiguration.EntryPoints {
|
||||
router := server.buildDefaultHTTPRouter()
|
||||
serverEntryPoints[entryPointName] = &serverEntryPoint{
|
||||
httpRouter: middlewares.NewHandlerSwitcher(router),
|
||||
}
|
||||
}
|
||||
return serverEntryPoints
|
||||
}
|
||||
|
||||
// LoadConfig returns a new gorilla.mux Route from the specified global configuration and the dynamic
|
||||
// provider configurations.
|
||||
func (server *Server) loadConfig(configurations configs, globalConfiguration GlobalConfiguration) (map[string]*serverEntryPoint, error) {
|
||||
serverEntryPoints := server.buildEntryPoints(globalConfiguration)
|
||||
redirectHandlers := make(map[string]http.Handler)
|
||||
|
||||
backends := map[string]http.Handler{}
|
||||
|
||||
backendsHealthcheck := map[string]*healthcheck.BackendHealthCheck{}
|
||||
|
||||
backend2FrontendMap := map[string]string{}
|
||||
for _, configuration := range configurations {
|
||||
frontendNames := sortedFrontendNamesForConfig(configuration)
|
||||
frontend:
|
||||
for _, frontendName := range frontendNames {
|
||||
frontend := configuration.Frontends[frontendName]
|
||||
|
||||
log.Debugf("Creating frontend %s", frontendName)
|
||||
|
||||
fwd, err := forward.New(forward.Logger(oxyLogger), forward.PassHostHeader(frontend.PassHostHeader))
|
||||
if err != nil {
|
||||
log.Errorf("Error creating forwarder for frontend %s: %v", frontendName, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
saveBackend := middlewares.NewSaveBackend(fwd)
|
||||
if len(frontend.EntryPoints) == 0 {
|
||||
log.Errorf("No entrypoint defined for frontend %s, defaultEntryPoints:%s", frontendName, globalConfiguration.DefaultEntryPoints)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
|
||||
for _, entryPointName := range frontend.EntryPoints {
|
||||
log.Debugf("Wiring frontend %s to entryPoint %s", frontendName, entryPointName)
|
||||
if _, ok := serverEntryPoints[entryPointName]; !ok {
|
||||
log.Errorf("Undefined entrypoint '%s' for frontend %s", entryPointName, frontendName)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
|
||||
newServerRoute := &serverRoute{route: serverEntryPoints[entryPointName].httpRouter.GetHandler().NewRoute().Name(frontendName)}
|
||||
for routeName, route := range frontend.Routes {
|
||||
err := getRoute(newServerRoute, &route)
|
||||
if err != nil {
|
||||
log.Errorf("Error creating route for frontend %s: %v", frontendName, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
log.Debugf("Creating route %s %s", routeName, route.Rule)
|
||||
}
|
||||
|
||||
entryPoint := globalConfiguration.EntryPoints[entryPointName]
|
||||
if entryPoint.Redirect != nil {
|
||||
if redirectHandlers[entryPointName] != nil {
|
||||
newServerRoute.route.Handler(redirectHandlers[entryPointName])
|
||||
} else if handler, err := server.loadEntryPointConfig(entryPointName, entryPoint); err != nil {
|
||||
log.Errorf("Error loading entrypoint configuration for frontend %s: %v", frontendName, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
} else {
|
||||
newServerRoute.route.Handler(handler)
|
||||
redirectHandlers[entryPointName] = handler
|
||||
}
|
||||
} else {
|
||||
if backends[frontend.Backend] == nil {
|
||||
log.Debugf("Creating backend %s", frontend.Backend)
|
||||
var lb http.Handler
|
||||
rr, _ := roundrobin.New(saveBackend)
|
||||
if configuration.Backends[frontend.Backend] == nil {
|
||||
log.Errorf("Undefined backend '%s' for frontend %s", frontend.Backend, frontendName)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
|
||||
lbMethod, err := types.NewLoadBalancerMethod(configuration.Backends[frontend.Backend].LoadBalancer)
|
||||
if err != nil {
|
||||
log.Errorf("Error loading load balancer method '%+v' for frontend %s: %v", configuration.Backends[frontend.Backend].LoadBalancer, frontendName, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
|
||||
stickysession := configuration.Backends[frontend.Backend].LoadBalancer.Sticky
|
||||
cookiename := "_TRAEFIK_BACKEND"
|
||||
var sticky *roundrobin.StickySession
|
||||
|
||||
if stickysession {
|
||||
sticky = roundrobin.NewStickySession(cookiename)
|
||||
}
|
||||
|
||||
switch lbMethod {
|
||||
case types.Drr:
|
||||
log.Debugf("Creating load-balancer drr")
|
||||
rebalancer, _ := roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger))
|
||||
if stickysession {
|
||||
log.Debugf("Sticky session with cookie %v", cookiename)
|
||||
rebalancer, _ = roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger), roundrobin.RebalancerStickySession(sticky))
|
||||
}
|
||||
lb = rebalancer
|
||||
for serverName, server := range configuration.Backends[frontend.Backend].Servers {
|
||||
url, err := url.Parse(server.URL)
|
||||
if err != nil {
|
||||
log.Errorf("Error parsing server URL %s: %v", server.URL, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
backend2FrontendMap[url.String()] = frontendName
|
||||
log.Debugf("Creating server %s at %s with weight %d", serverName, url.String(), server.Weight)
|
||||
if err := rebalancer.UpsertServer(url, roundrobin.Weight(server.Weight)); err != nil {
|
||||
log.Errorf("Error adding server %s to load balancer: %v", server.URL, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
if configuration.Backends[frontend.Backend].HealthCheck != nil {
|
||||
var interval time.Duration
|
||||
if configuration.Backends[frontend.Backend].HealthCheck.Interval != "" {
|
||||
interval, err = time.ParseDuration(configuration.Backends[frontend.Backend].HealthCheck.Interval)
|
||||
if err != nil {
|
||||
log.Errorf("Wrong healthcheck interval: %s", err)
|
||||
interval = time.Second * 30
|
||||
}
|
||||
}
|
||||
backendsHealthcheck[frontend.Backend] = healthcheck.NewBackendHealthCheck(configuration.Backends[frontend.Backend].HealthCheck.Path, interval, rebalancer)
|
||||
}
|
||||
}
|
||||
case types.Wrr:
|
||||
log.Debugf("Creating load-balancer wrr")
|
||||
if stickysession {
|
||||
log.Debugf("Sticky session with cookie %v", cookiename)
|
||||
rr, _ = roundrobin.New(saveBackend, roundrobin.EnableStickySession(sticky))
|
||||
}
|
||||
lb = rr
|
||||
for serverName, server := range configuration.Backends[frontend.Backend].Servers {
|
||||
url, err := url.Parse(server.URL)
|
||||
if err != nil {
|
||||
log.Errorf("Error parsing server URL %s: %v", server.URL, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
backend2FrontendMap[url.String()] = frontendName
|
||||
log.Debugf("Creating server %s at %s with weight %d", serverName, url.String(), server.Weight)
|
||||
if err := rr.UpsertServer(url, roundrobin.Weight(server.Weight)); err != nil {
|
||||
log.Errorf("Error adding server %s to load balancer: %v", server.URL, err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
}
|
||||
if configuration.Backends[frontend.Backend].HealthCheck != nil {
|
||||
var interval time.Duration
|
||||
if configuration.Backends[frontend.Backend].HealthCheck.Interval != "" {
|
||||
interval, err = time.ParseDuration(configuration.Backends[frontend.Backend].HealthCheck.Interval)
|
||||
if err != nil {
|
||||
log.Errorf("Wrong healthcheck interval: %s", err)
|
||||
interval = time.Second * 30
|
||||
}
|
||||
}
|
||||
backendsHealthcheck[frontend.Backend] = healthcheck.NewBackendHealthCheck(configuration.Backends[frontend.Backend].HealthCheck.Path, interval, rr)
|
||||
}
|
||||
}
|
||||
maxConns := configuration.Backends[frontend.Backend].MaxConn
|
||||
if maxConns != nil && maxConns.Amount != 0 {
|
||||
extractFunc, err := utils.NewExtractor(maxConns.ExtractorFunc)
|
||||
if err != nil {
|
||||
log.Errorf("Error creating connlimit: %v", err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
log.Debugf("Creating load-balancer connlimit")
|
||||
lb, err = connlimit.New(lb, extractFunc, maxConns.Amount, connlimit.Logger(oxyLogger))
|
||||
if err != nil {
|
||||
log.Errorf("Error creating connlimit: %v", err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
}
|
||||
// retry ?
|
||||
if globalConfiguration.Retry != nil {
|
||||
retries := len(configuration.Backends[frontend.Backend].Servers)
|
||||
if globalConfiguration.Retry.Attempts > 0 {
|
||||
retries = globalConfiguration.Retry.Attempts
|
||||
}
|
||||
lb = middlewares.NewRetry(retries, lb)
|
||||
log.Debugf("Creating retries max attempts %d", retries)
|
||||
}
|
||||
|
||||
var negroni = negroni.New()
|
||||
if server.globalConfiguration.Web != nil && server.globalConfiguration.Web.Metrics != nil {
|
||||
if server.globalConfiguration.Web.Metrics.Prometheus != nil {
|
||||
metricsMiddlewareBackend := middlewares.NewMetricsWrapper(middlewares.NewPrometheus(frontend.Backend, server.globalConfiguration.Web.Metrics.Prometheus))
|
||||
negroni.Use(metricsMiddlewareBackend)
|
||||
}
|
||||
}
|
||||
|
||||
if len(frontend.BasicAuth) > 0 {
|
||||
users := types.Users{}
|
||||
for _, user := range frontend.BasicAuth {
|
||||
users = append(users, user)
|
||||
}
|
||||
|
||||
auth := &types.Auth{}
|
||||
auth.Basic = &types.Basic{
|
||||
Users: users,
|
||||
}
|
||||
authMiddleware, err := middlewares.NewAuthenticator(auth)
|
||||
if err != nil {
|
||||
log.Fatal("Error creating Auth: ", err)
|
||||
}
|
||||
negroni.Use(authMiddleware)
|
||||
}
|
||||
|
||||
if configuration.Backends[frontend.Backend].CircuitBreaker != nil {
|
||||
log.Debugf("Creating circuit breaker %s", configuration.Backends[frontend.Backend].CircuitBreaker.Expression)
|
||||
cbreaker, err := middlewares.NewCircuitBreaker(lb, configuration.Backends[frontend.Backend].CircuitBreaker.Expression, cbreaker.Logger(oxyLogger))
|
||||
if err != nil {
|
||||
log.Errorf("Error creating circuit breaker: %v", err)
|
||||
log.Errorf("Skipping frontend %s...", frontendName)
|
||||
continue frontend
|
||||
}
|
||||
negroni.Use(cbreaker)
|
||||
} else {
|
||||
negroni.UseHandler(lb)
|
||||
}
|
||||
backends[frontend.Backend] = negroni
|
||||
} else {
|
||||
log.Debugf("Reusing backend %s", frontend.Backend)
|
||||
}
|
||||
if frontend.Priority > 0 {
|
||||
newServerRoute.route.Priority(frontend.Priority)
|
||||
}
|
||||
server.wireFrontendBackend(newServerRoute, backends[frontend.Backend])
|
||||
}
|
||||
err := newServerRoute.route.GetError()
|
||||
if err != nil {
|
||||
log.Errorf("Error building route: %s", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
healthcheck.GetHealthCheck().SetBackendsConfiguration(server.routinesPool.Ctx(), backendsHealthcheck)
|
||||
middlewares.SetBackend2FrontendMap(&backend2FrontendMap)
|
||||
//sort routes
|
||||
for _, serverEntryPoint := range serverEntryPoints {
|
||||
serverEntryPoint.httpRouter.GetHandler().SortRoutes()
|
||||
}
|
||||
return serverEntryPoints, nil
|
||||
}
|
||||
|
||||
func (server *Server) wireFrontendBackend(serverRoute *serverRoute, handler http.Handler) {
|
||||
// add prefix
|
||||
if len(serverRoute.addPrefix) > 0 {
|
||||
handler = &middlewares.AddPrefix{
|
||||
Prefix: serverRoute.addPrefix,
|
||||
Handler: handler,
|
||||
}
|
||||
}
|
||||
|
||||
// strip prefix
|
||||
if len(serverRoute.stripPrefixes) > 0 {
|
||||
handler = &middlewares.StripPrefix{
|
||||
Prefixes: serverRoute.stripPrefixes,
|
||||
Handler: handler,
|
||||
}
|
||||
}
|
||||
|
||||
serverRoute.route.Handler(handler)
|
||||
}
|
||||
|
||||
func (server *Server) loadEntryPointConfig(entryPointName string, entryPoint *EntryPoint) (http.Handler, error) {
|
||||
regex := entryPoint.Redirect.Regex
|
||||
replacement := entryPoint.Redirect.Replacement
|
||||
if len(entryPoint.Redirect.EntryPoint) > 0 {
|
||||
regex = "^(?:https?:\\/\\/)?([\\w\\._-]+)(?::\\d+)?(.*)$"
|
||||
if server.globalConfiguration.EntryPoints[entryPoint.Redirect.EntryPoint] == nil {
|
||||
return nil, errors.New("Unknown entrypoint " + entryPoint.Redirect.EntryPoint)
|
||||
}
|
||||
protocol := "http"
|
||||
if server.globalConfiguration.EntryPoints[entryPoint.Redirect.EntryPoint].TLS != nil {
|
||||
protocol = "https"
|
||||
}
|
||||
r, _ := regexp.Compile("(:\\d+)")
|
||||
match := r.FindStringSubmatch(server.globalConfiguration.EntryPoints[entryPoint.Redirect.EntryPoint].Address)
|
||||
if len(match) == 0 {
|
||||
return nil, errors.New("Bad Address format: " + server.globalConfiguration.EntryPoints[entryPoint.Redirect.EntryPoint].Address)
|
||||
}
|
||||
replacement = protocol + "://$1" + match[0] + "$2"
|
||||
}
|
||||
rewrite, err := middlewares.NewRewrite(regex, replacement, true)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
log.Debugf("Creating entryPoint redirect %s -> %s : %s -> %s", entryPointName, entryPoint.Redirect.EntryPoint, regex, replacement)
|
||||
negroni := negroni.New()
|
||||
negroni.Use(rewrite)
|
||||
return negroni, nil
|
||||
}
|
||||
|
||||
func (server *Server) buildDefaultHTTPRouter() *mux.Router {
|
||||
router := mux.NewRouter()
|
||||
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
|
||||
router.StrictSlash(true)
|
||||
router.SkipClean(true)
|
||||
return router
|
||||
}
|
||||
|
||||
func getRoute(serverRoute *serverRoute, route *types.Route) error {
|
||||
rules := Rules{route: serverRoute}
|
||||
newRoute, err := rules.Parse(route.Rule)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
newRoute.Priority(serverRoute.route.GetPriority() + len(route.Rule))
|
||||
serverRoute.route = newRoute
|
||||
return nil
|
||||
}
|
||||
|
||||
func sortedFrontendNamesForConfig(configuration *types.Configuration) []string {
|
||||
keys := []string{}
|
||||
for key := range configuration.Frontends {
|
||||
keys = append(keys, key)
|
||||
}
|
||||
sort.Strings(keys)
|
||||
return keys
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue