1266 lines
46 KiB
Go
1266 lines
46 KiB
Go
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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"fmt"
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"io/ioutil"
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"net"
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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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"time"
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"github.com/armon/go-proxyproto"
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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/configuration"
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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/metrics"
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"github.com/containous/traefik/middlewares"
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"github.com/containous/traefik/middlewares/accesslog"
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mauth "github.com/containous/traefik/middlewares/auth"
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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/server/cookie"
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"github.com/containous/traefik/types"
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"github.com/containous/traefik/whitelist"
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"github.com/streamrail/concurrent-map"
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thoas_stats "github.com/thoas/stats"
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"github.com/urfave/negroni"
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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/ratelimit"
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"github.com/vulcand/oxy/roundrobin"
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"github.com/vulcand/oxy/utils"
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"golang.org/x/net/http2"
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)
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var (
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oxyLogger = &OxyLogger{}
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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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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 configuration.GlobalConfiguration
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accessLoggerMiddleware *accesslog.LogHandler
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routinesPool *safe.Pool
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leadership *cluster.Leadership
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defaultForwardingRoundTripper http.RoundTripper
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metricsRegistry metrics.Registry
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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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listener net.Listener
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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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stripPrefixesRegex []string
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addPrefix string
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replacePath string
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}
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// NewServer returns an initialized Server.
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func NewServer(globalConfiguration configuration.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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server.configureSignals()
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currentConfigurations := make(types.Configurations)
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server.currentConfigurations.Set(currentConfigurations)
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server.globalConfiguration = globalConfiguration
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server.routinesPool = safe.NewPool(context.Background())
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server.defaultForwardingRoundTripper = createHTTPTransport(globalConfiguration)
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server.metricsRegistry = metrics.NewVoidRegistry()
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if globalConfiguration.Web != nil && globalConfiguration.Web.Metrics != nil {
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server.registerMetricClients(globalConfiguration.Web.Metrics)
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}
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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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if globalConfiguration.AccessLogsFile != "" {
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globalConfiguration.AccessLog = &types.AccessLog{FilePath: globalConfiguration.AccessLogsFile, Format: accesslog.CommonFormat}
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}
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if globalConfiguration.AccessLog != nil {
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var err error
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server.accessLoggerMiddleware, err = accesslog.NewLogHandler(globalConfiguration.AccessLog)
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if err != nil {
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log.Warnf("Unable to create log handler: %s", err)
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}
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}
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return server
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}
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// createHTTPTransport creates an http.Transport configured with the GlobalConfiguration settings.
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// For the settings that can't be configured in Traefik it uses the default http.Transport settings.
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// An exception to this is the MaxIdleConns setting as we only provide the option MaxIdleConnsPerHost
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// in Traefik at this point in time. Setting this value to the default of 100 could lead to confusing
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// behaviour and backwards compatibility issues.
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func createHTTPTransport(globalConfiguration configuration.GlobalConfiguration) *http.Transport {
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dialer := &net.Dialer{
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Timeout: configuration.DefaultDialTimeout,
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KeepAlive: 30 * time.Second,
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DualStack: true,
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}
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if globalConfiguration.ForwardingTimeouts != nil {
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dialer.Timeout = time.Duration(globalConfiguration.ForwardingTimeouts.DialTimeout)
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}
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transport := &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: dialer.DialContext,
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MaxIdleConnsPerHost: globalConfiguration.MaxIdleConnsPerHost,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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}
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if globalConfiguration.ForwardingTimeouts != nil {
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transport.ResponseHeaderTimeout = time.Duration(globalConfiguration.ForwardingTimeouts.ResponseHeaderTimeout)
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}
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if globalConfiguration.InsecureSkipVerify {
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transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
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}
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if len(globalConfiguration.RootCAs) > 0 {
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transport.TLSClientConfig = &tls.Config{
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RootCAs: createRootCACertPool(globalConfiguration.RootCAs),
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}
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}
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http2.ConfigureTransport(transport)
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return transport
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}
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func createRootCACertPool(rootCAs configuration.RootCAs) *x509.CertPool {
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roots := x509.NewCertPool()
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for _, cert := range rootCAs {
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certContent, err := cert.Read()
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if err != nil {
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log.Error("Error while read RootCAs", err)
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continue
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}
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roots.AppendCertsFromPEM(certContent)
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}
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return roots
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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.LifeCycle.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.LifeCycle.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.Warn("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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stopMetricsClients()
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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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if server.accessLoggerMiddleware != nil {
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if err := server.accessLoggerMiddleware.Close(); err != nil {
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log.Errorf("Error closing access log file: %s", err)
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}
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}
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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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}
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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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serverEntryPoint := server.setupServerEntryPoint(newServerEntryPointName, newServerEntryPoint)
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go server.startServer(serverEntryPoint, server.globalConfiguration)
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}
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}
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func (server *Server) setupServerEntryPoint(newServerEntryPointName string, newServerEntryPoint *serverEntryPoint) *serverEntryPoint {
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serverMiddlewares := []negroni.Handler{middlewares.NegroniRecoverHandler()}
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if server.accessLoggerMiddleware != nil {
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serverMiddlewares = append(serverMiddlewares, server.accessLoggerMiddleware)
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}
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if server.metricsRegistry.IsEnabled() {
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serverMiddlewares = append(serverMiddlewares, middlewares.NewMetricsWrapper(server.metricsRegistry, newServerEntryPointName))
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}
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if server.globalConfiguration.Web != nil {
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server.globalConfiguration.Web.Stats = thoas_stats.New()
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serverMiddlewares = append(serverMiddlewares, server.globalConfiguration.Web.Stats)
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if server.globalConfiguration.Web.Statistics != nil {
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server.globalConfiguration.Web.StatsRecorder = middlewares.NewStatsRecorder(server.globalConfiguration.Web.Statistics.RecentErrors)
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serverMiddlewares = append(serverMiddlewares, server.globalConfiguration.Web.StatsRecorder)
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}
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}
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if server.globalConfiguration.EntryPoints[newServerEntryPointName].Auth != nil {
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authMiddleware, err := mauth.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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if len(server.globalConfiguration.EntryPoints[newServerEntryPointName].WhitelistSourceRange) > 0 {
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ipWhitelistMiddleware, err := middlewares.NewIPWhitelister(server.globalConfiguration.EntryPoints[newServerEntryPointName].WhitelistSourceRange)
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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, ipWhitelistMiddleware)
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}
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newSrv, listener, err := server.prepareServer(newServerEntryPointName, server.globalConfiguration.EntryPoints[newServerEntryPointName], newServerEntryPoint.httpRouter, 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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serverEntryPoint.listener = listener
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return serverEntryPoint
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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().(types.Configurations)
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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)
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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)
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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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server.configureFrontends(configuration.Frontends)
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server.configureBackends(configuration.Backends)
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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().(types.Configurations)
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|
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// Copy configurations to new map so we don't change current if LoadConfig fails
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newConfigurations := make(types.Configurations)
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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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|
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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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}
|
|
}
|
|
|
|
func (server *Server) postLoadConfig() {
|
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if server.globalConfiguration.ACME == nil {
|
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return
|
|
}
|
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if server.leadership != nil && !server.leadership.IsLeader() {
|
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return
|
|
}
|
|
if server.globalConfiguration.ACME.OnHostRule {
|
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currentConfigurations := server.currentConfigurations.Get().(types.Configurations)
|
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for _, config := range currentConfigurations {
|
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for _, frontend := range config.Frontends {
|
|
|
|
// check if one of the frontend entrypoints is configured with TLS
|
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// and is configured with ACME
|
|
ACMEEnabled := false
|
|
for _, entrypoint := range frontend.EntryPoints {
|
|
if server.globalConfiguration.ACME.EntryPoint == entrypoint && server.globalConfiguration.EntryPoints[entrypoint].TLS != nil {
|
|
ACMEEnabled = true
|
|
break
|
|
}
|
|
}
|
|
|
|
if ACMEEnabled {
|
|
for _, route := range frontend.Routes {
|
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rules := Rules{}
|
|
domains, err := rules.ParseDomains(route.Rule)
|
|
if err != nil {
|
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log.Errorf("Error parsing domains: %v", err)
|
|
} else {
|
|
server.globalConfiguration.ACME.LoadCertificateForDomains(domains)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (server *Server) configureProviders() {
|
|
// configure providers
|
|
if server.globalConfiguration.Docker != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Docker)
|
|
}
|
|
if server.globalConfiguration.Marathon != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Marathon)
|
|
}
|
|
if server.globalConfiguration.File != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.File)
|
|
}
|
|
if server.globalConfiguration.Web != nil {
|
|
server.globalConfiguration.Web.CurrentConfigurations = &server.currentConfigurations
|
|
server.globalConfiguration.Web.Debug = server.globalConfiguration.Debug
|
|
server.providers = append(server.providers, server.globalConfiguration.Web)
|
|
}
|
|
if server.globalConfiguration.Consul != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Consul)
|
|
}
|
|
if server.globalConfiguration.ConsulCatalog != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.ConsulCatalog)
|
|
}
|
|
if server.globalConfiguration.Etcd != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Etcd)
|
|
}
|
|
if server.globalConfiguration.Zookeeper != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Zookeeper)
|
|
}
|
|
if server.globalConfiguration.Boltdb != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Boltdb)
|
|
}
|
|
if server.globalConfiguration.Kubernetes != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Kubernetes)
|
|
}
|
|
if server.globalConfiguration.Mesos != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Mesos)
|
|
}
|
|
if server.globalConfiguration.Eureka != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Eureka)
|
|
}
|
|
if server.globalConfiguration.ECS != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.ECS)
|
|
}
|
|
if server.globalConfiguration.Rancher != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.Rancher)
|
|
}
|
|
if server.globalConfiguration.DynamoDB != nil {
|
|
server.providers = append(server.providers, server.globalConfiguration.DynamoDB)
|
|
}
|
|
}
|
|
|
|
func (server *Server) startProviders() {
|
|
// start providers
|
|
for _, p := range server.providers {
|
|
providerType := reflect.TypeOf(p)
|
|
jsonConf, _ := json.Marshal(p)
|
|
log.Infof("Starting provider %v %s", providerType, jsonConf)
|
|
currentProvider := p
|
|
safe.Go(func() {
|
|
err := currentProvider.Provide(server.configurationChan, server.routinesPool, server.globalConfiguration.Constraints)
|
|
if err != nil {
|
|
log.Errorf("Error starting provider %v: %s", providerType, err)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func createClientTLSConfig(tlsOption *configuration.TLS) (*tls.Config, error) {
|
|
if tlsOption == nil {
|
|
return nil, errors.New("no TLS provided")
|
|
}
|
|
|
|
config, err := tlsOption.Certificates.CreateTLSConfig()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if len(tlsOption.ClientCAFiles) > 0 {
|
|
pool := x509.NewCertPool()
|
|
for _, caFile := range tlsOption.ClientCAFiles {
|
|
data, err := ioutil.ReadFile(caFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !pool.AppendCertsFromPEM(data) {
|
|
return nil, errors.New("invalid certificate(s) in " + caFile)
|
|
}
|
|
}
|
|
config.RootCAs = pool
|
|
}
|
|
config.BuildNameToCertificate()
|
|
return config, nil
|
|
}
|
|
|
|
// creates a TLS config that allows terminating HTTPS for multiple domains using SNI
|
|
func (server *Server) createTLSConfig(entryPointName string, tlsOption *configuration.TLS, router *middlewares.HandlerSwitcher) (*tls.Config, error) {
|
|
if tlsOption == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
config, err := tlsOption.Certificates.CreateTLSConfig()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// ensure http2 enabled
|
|
config.NextProtos = []string{"h2", "http/1.1"}
|
|
|
|
if len(tlsOption.ClientCAFiles) > 0 {
|
|
pool := x509.NewCertPool()
|
|
for _, caFile := range tlsOption.ClientCAFiles {
|
|
data, err := ioutil.ReadFile(caFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ok := pool.AppendCertsFromPEM(data)
|
|
if !ok {
|
|
return nil, errors.New("invalid certificate(s) in " + caFile)
|
|
}
|
|
}
|
|
config.ClientCAs = pool
|
|
config.ClientAuth = tls.RequireAndVerifyClientCert
|
|
}
|
|
|
|
if server.globalConfiguration.ACME != nil {
|
|
if _, ok := server.serverEntryPoints[server.globalConfiguration.ACME.EntryPoint]; ok {
|
|
if entryPointName == server.globalConfiguration.ACME.EntryPoint {
|
|
checkOnDemandDomain := func(domain string) bool {
|
|
routeMatch := &mux.RouteMatch{}
|
|
router := router.GetHandler()
|
|
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 := configuration.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 := configuration.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(serverEntryPoint *serverEntryPoint, globalConfiguration configuration.GlobalConfiguration) {
|
|
log.Infof("Starting server on %s", serverEntryPoint.httpServer.Addr)
|
|
var err error
|
|
if serverEntryPoint.httpServer.TLSConfig != nil {
|
|
err = serverEntryPoint.httpServer.ServeTLS(serverEntryPoint.listener, "", "")
|
|
} else {
|
|
err = serverEntryPoint.httpServer.Serve(serverEntryPoint.listener)
|
|
}
|
|
if err != http.ErrServerClosed {
|
|
log.Error("Error creating server: ", err)
|
|
}
|
|
}
|
|
|
|
func (server *Server) prepareServer(entryPointName string, entryPoint *configuration.EntryPoint, router *middlewares.HandlerSwitcher, middlewares ...negroni.Handler) (*http.Server, net.Listener, error) {
|
|
readTimeout, writeTimeout, idleTimeout := buildServerTimeouts(server.globalConfiguration)
|
|
log.Infof("Preparing server %s %+v with readTimeout=%s writeTimeout=%s idleTimeout=%s", entryPointName, entryPoint, readTimeout, writeTimeout, idleTimeout)
|
|
|
|
// middlewares
|
|
n := negroni.New()
|
|
for _, middleware := range middlewares {
|
|
n.Use(middleware)
|
|
}
|
|
n.UseHandler(router)
|
|
|
|
tlsConfig, err := server.createTLSConfig(entryPointName, entryPoint.TLS, router)
|
|
if err != nil {
|
|
log.Errorf("Error creating TLS config: %s", err)
|
|
return nil, nil, err
|
|
}
|
|
|
|
listener, err := net.Listen("tcp", entryPoint.Address)
|
|
if err != nil {
|
|
log.Error("Error opening listener ", err)
|
|
return nil, nil, err
|
|
}
|
|
|
|
if entryPoint.ProxyProtocol != nil {
|
|
IPs, err := whitelist.NewIP(entryPoint.ProxyProtocol.TrustedIPs)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("Error creating whitelist: %s", err)
|
|
}
|
|
log.Infof("Enabling ProxyProtocol for trusted IPs %v", entryPoint.ProxyProtocol.TrustedIPs)
|
|
listener = &proxyproto.Listener{
|
|
Listener: listener,
|
|
SourceCheck: func(addr net.Addr) (bool, error) {
|
|
ip, ok := addr.(*net.TCPAddr)
|
|
if !ok {
|
|
return false, fmt.Errorf("Type error %v", addr)
|
|
}
|
|
return IPs.ContainsIP(ip.IP)
|
|
},
|
|
}
|
|
}
|
|
|
|
return &http.Server{
|
|
Addr: entryPoint.Address,
|
|
Handler: n,
|
|
TLSConfig: tlsConfig,
|
|
ReadTimeout: readTimeout,
|
|
WriteTimeout: writeTimeout,
|
|
IdleTimeout: idleTimeout,
|
|
},
|
|
listener,
|
|
nil
|
|
}
|
|
|
|
func buildServerTimeouts(globalConfig configuration.GlobalConfiguration) (readTimeout, writeTimeout, idleTimeout time.Duration) {
|
|
readTimeout = time.Duration(0)
|
|
writeTimeout = time.Duration(0)
|
|
if globalConfig.RespondingTimeouts != nil {
|
|
readTimeout = time.Duration(globalConfig.RespondingTimeouts.ReadTimeout)
|
|
writeTimeout = time.Duration(globalConfig.RespondingTimeouts.WriteTimeout)
|
|
}
|
|
|
|
// Prefer legacy idle timeout parameter for backwards compatibility reasons
|
|
if globalConfig.IdleTimeout > 0 {
|
|
idleTimeout = time.Duration(globalConfig.IdleTimeout)
|
|
log.Warn("top-level idle timeout configuration has been deprecated -- please use responding timeouts")
|
|
} else if globalConfig.RespondingTimeouts != nil {
|
|
idleTimeout = time.Duration(globalConfig.RespondingTimeouts.IdleTimeout)
|
|
} else {
|
|
idleTimeout = time.Duration(configuration.DefaultIdleTimeout)
|
|
}
|
|
|
|
return readTimeout, writeTimeout, idleTimeout
|
|
}
|
|
|
|
func (server *Server) buildEntryPoints(globalConfiguration configuration.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
|
|
}
|
|
|
|
// getRoundTripper will either use server.defaultForwardingRoundTripper or create a new one
|
|
// given a custom TLS configuration is passed and the passTLSCert option is set to true.
|
|
func (server *Server) getRoundTripper(globalConfiguration configuration.GlobalConfiguration, passTLSCert bool, tls *configuration.TLS) (http.RoundTripper, error) {
|
|
if passTLSCert {
|
|
tlsConfig, err := createClientTLSConfig(tls)
|
|
if err != nil {
|
|
log.Errorf("Failed to create TLSClientConfig: %s", err)
|
|
return nil, err
|
|
}
|
|
|
|
transport := createHTTPTransport(globalConfiguration)
|
|
transport.TLSClientConfig = tlsConfig
|
|
return transport, nil
|
|
}
|
|
|
|
return server.defaultForwardingRoundTripper, nil
|
|
}
|
|
|
|
// LoadConfig returns a new gorilla.mux Route from the specified global configuration and the dynamic
|
|
// provider configurations.
|
|
func (server *Server) loadConfig(configurations types.Configurations, globalConfiguration configuration.GlobalConfiguration) (map[string]*serverEntryPoint, error) {
|
|
serverEntryPoints := server.buildEntryPoints(globalConfiguration)
|
|
redirectHandlers := make(map[string]negroni.Handler)
|
|
backends := map[string]http.Handler{}
|
|
backendsHealthCheck := map[string]*healthcheck.BackendHealthCheck{}
|
|
errorHandler := NewRecordingErrorHandler(middlewares.DefaultNetErrorRecorder{})
|
|
|
|
for _, config := range configurations {
|
|
frontendNames := sortedFrontendNamesForConfig(config)
|
|
frontend:
|
|
for _, frontendName := range frontendNames {
|
|
frontend := config.Frontends[frontendName]
|
|
|
|
log.Debugf("Creating frontend %s", frontendName)
|
|
|
|
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]
|
|
n := negroni.New()
|
|
if entryPoint.Redirect != nil {
|
|
if redirectHandlers[entryPointName] != nil {
|
|
n.Use(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 {
|
|
if server.accessLoggerMiddleware != nil {
|
|
saveFrontend := accesslog.NewSaveNegroniFrontend(handler, frontendName)
|
|
n.Use(saveFrontend)
|
|
redirectHandlers[entryPointName] = saveFrontend
|
|
} else {
|
|
n.Use(handler)
|
|
redirectHandlers[entryPointName] = handler
|
|
}
|
|
}
|
|
}
|
|
if backends[entryPointName+frontend.Backend] == nil {
|
|
log.Debugf("Creating backend %s", frontend.Backend)
|
|
|
|
roundTripper, err := server.getRoundTripper(globalConfiguration, frontend.PassTLSCert, entryPoint.TLS)
|
|
if err != nil {
|
|
log.Errorf("Failed to create RoundTripper for frontend %s: %v", frontendName, err)
|
|
log.Errorf("Skipping frontend %s...", frontendName)
|
|
continue frontend
|
|
}
|
|
|
|
fwd, err := forward.New(
|
|
forward.Logger(oxyLogger),
|
|
forward.PassHostHeader(frontend.PassHostHeader),
|
|
forward.RoundTripper(roundTripper),
|
|
forward.ErrorHandler(errorHandler),
|
|
)
|
|
|
|
if err != nil {
|
|
log.Errorf("Error creating forwarder for frontend %s: %v", frontendName, err)
|
|
log.Errorf("Skipping frontend %s...", frontendName)
|
|
continue frontend
|
|
}
|
|
|
|
var rr *roundrobin.RoundRobin
|
|
var saveFrontend http.Handler
|
|
if server.accessLoggerMiddleware != nil {
|
|
saveBackend := accesslog.NewSaveBackend(fwd, frontend.Backend)
|
|
saveFrontend = accesslog.NewSaveFrontend(saveBackend, frontendName)
|
|
rr, _ = roundrobin.New(saveFrontend)
|
|
} else {
|
|
rr, _ = roundrobin.New(fwd)
|
|
}
|
|
|
|
if config.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(config.Backends[frontend.Backend].LoadBalancer)
|
|
if err != nil {
|
|
log.Errorf("Error loading load balancer method '%+v' for frontend %s: %v", config.Backends[frontend.Backend].LoadBalancer, frontendName, err)
|
|
log.Errorf("Skipping frontend %s...", frontendName)
|
|
continue frontend
|
|
}
|
|
|
|
var sticky *roundrobin.StickySession
|
|
var cookieName string
|
|
if stickiness := config.Backends[frontend.Backend].LoadBalancer.Stickiness; stickiness != nil {
|
|
cookieName = cookie.GetName(stickiness.CookieName, frontend.Backend)
|
|
sticky = roundrobin.NewStickySession(cookieName)
|
|
}
|
|
|
|
var lb http.Handler
|
|
switch lbMethod {
|
|
case types.Drr:
|
|
log.Debugf("Creating load-balancer drr")
|
|
rebalancer, _ := roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger))
|
|
if sticky != nil {
|
|
log.Debugf("Sticky session with cookie %v", cookieName)
|
|
rebalancer, _ = roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger), roundrobin.RebalancerStickySession(sticky))
|
|
}
|
|
lb = rebalancer
|
|
if err := configureLBServers(rebalancer, config, frontend); err != nil {
|
|
log.Errorf("Skipping frontend %s...", frontendName)
|
|
continue frontend
|
|
}
|
|
hcOpts := parseHealthCheckOptions(rebalancer, frontend.Backend, config.Backends[frontend.Backend].HealthCheck, globalConfiguration.HealthCheck)
|
|
if hcOpts != nil {
|
|
log.Debugf("Setting up backend health check %s", *hcOpts)
|
|
backendsHealthCheck[entryPointName+frontend.Backend] = healthcheck.NewBackendHealthCheck(*hcOpts)
|
|
}
|
|
lb = middlewares.NewEmptyBackendHandler(rebalancer, lb)
|
|
case types.Wrr:
|
|
log.Debugf("Creating load-balancer wrr")
|
|
if sticky != nil {
|
|
log.Debugf("Sticky session with cookie %v", cookieName)
|
|
if server.accessLoggerMiddleware != nil {
|
|
rr, _ = roundrobin.New(saveFrontend, roundrobin.EnableStickySession(sticky))
|
|
} else {
|
|
rr, _ = roundrobin.New(fwd, roundrobin.EnableStickySession(sticky))
|
|
}
|
|
}
|
|
lb = rr
|
|
if err := configureLBServers(rr, config, frontend); err != nil {
|
|
log.Errorf("Skipping frontend %s...", frontendName)
|
|
continue frontend
|
|
}
|
|
hcOpts := parseHealthCheckOptions(rr, frontend.Backend, config.Backends[frontend.Backend].HealthCheck, globalConfiguration.HealthCheck)
|
|
if hcOpts != nil {
|
|
log.Debugf("Setting up backend health check %s", *hcOpts)
|
|
backendsHealthCheck[entryPointName+frontend.Backend] = healthcheck.NewBackendHealthCheck(*hcOpts)
|
|
}
|
|
lb = middlewares.NewEmptyBackendHandler(rr, lb)
|
|
}
|
|
|
|
if len(frontend.Errors) > 0 {
|
|
for _, errorPage := range frontend.Errors {
|
|
if config.Backends[errorPage.Backend] != nil && config.Backends[errorPage.Backend].Servers["error"].URL != "" {
|
|
errorPageHandler, err := middlewares.NewErrorPagesHandler(errorPage, config.Backends[errorPage.Backend].Servers["error"].URL)
|
|
if err != nil {
|
|
log.Errorf("Error creating custom error page middleware, %v", err)
|
|
} else {
|
|
n.Use(errorPageHandler)
|
|
}
|
|
} else {
|
|
log.Errorf("Error Page is configured for Frontend %s, but either Backend %s is not set or Backend URL is missing", frontendName, errorPage.Backend)
|
|
}
|
|
}
|
|
}
|
|
|
|
if frontend.RateLimit != nil && len(frontend.RateLimit.RateSet) > 0 {
|
|
lb, err = server.buildRateLimiter(lb, frontend.RateLimit)
|
|
if err != nil {
|
|
log.Errorf("Error creating rate limiter: %v", err)
|
|
log.Errorf("Skipping frontend %s...", frontendName)
|
|
continue frontend
|
|
}
|
|
}
|
|
|
|
maxConns := config.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
|
|
}
|
|
}
|
|
|
|
if globalConfiguration.Retry != nil {
|
|
countServers := len(config.Backends[frontend.Backend].Servers)
|
|
lb = server.buildRetryMiddleware(lb, globalConfiguration, countServers, frontend.Backend)
|
|
}
|
|
|
|
if server.metricsRegistry.IsEnabled() {
|
|
n.Use(middlewares.NewMetricsWrapper(server.metricsRegistry, frontend.Backend))
|
|
}
|
|
|
|
ipWhitelistMiddleware, err := configureIPWhitelistMiddleware(frontend.WhitelistSourceRange)
|
|
if err != nil {
|
|
log.Fatalf("Error creating IP Whitelister: %s", err)
|
|
} else if ipWhitelistMiddleware != nil {
|
|
n.Use(ipWhitelistMiddleware)
|
|
log.Infof("Configured IP Whitelists: %s", frontend.WhitelistSourceRange)
|
|
}
|
|
|
|
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 := mauth.NewAuthenticator(auth)
|
|
if err != nil {
|
|
log.Errorf("Error creating Auth: %s", err)
|
|
} else {
|
|
n.Use(authMiddleware)
|
|
}
|
|
}
|
|
|
|
if frontend.Headers.HasCustomHeadersDefined() {
|
|
headerMiddleware := middlewares.NewHeaderFromStruct(frontend.Headers)
|
|
log.Debugf("Adding header middleware for frontend %s", frontendName)
|
|
n.Use(headerMiddleware)
|
|
}
|
|
if frontend.Headers.HasSecureHeadersDefined() {
|
|
secureMiddleware := middlewares.NewSecure(frontend.Headers)
|
|
log.Debugf("Adding secure middleware for frontend %s", frontendName)
|
|
n.UseFunc(secureMiddleware.HandlerFuncWithNext)
|
|
}
|
|
|
|
if config.Backends[frontend.Backend].CircuitBreaker != nil {
|
|
log.Debugf("Creating circuit breaker %s", config.Backends[frontend.Backend].CircuitBreaker.Expression)
|
|
circuitBreaker, err := middlewares.NewCircuitBreaker(lb, config.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
|
|
}
|
|
n.Use(circuitBreaker)
|
|
} else {
|
|
n.UseHandler(lb)
|
|
}
|
|
backends[entryPointName+frontend.Backend] = n
|
|
} else {
|
|
log.Debugf("Reusing backend %s", frontend.Backend)
|
|
}
|
|
if frontend.Priority > 0 {
|
|
newServerRoute.route.Priority(frontend.Priority)
|
|
}
|
|
server.wireFrontendBackend(newServerRoute, backends[entryPointName+frontend.Backend])
|
|
|
|
err := newServerRoute.route.GetError()
|
|
if err != nil {
|
|
log.Errorf("Error building route: %s", err)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
healthcheck.GetHealthCheck().SetBackendsConfiguration(server.routinesPool.Ctx(), backendsHealthCheck)
|
|
//sort routes
|
|
for _, serverEntryPoint := range serverEntryPoints {
|
|
serverEntryPoint.httpRouter.GetHandler().SortRoutes()
|
|
}
|
|
return serverEntryPoints, nil
|
|
}
|
|
|
|
func configureLBServers(lb healthcheck.LoadBalancer, config *types.Configuration, frontend *types.Frontend) error {
|
|
for serverName, server := range config.Backends[frontend.Backend].Servers {
|
|
u, err := url.Parse(server.URL)
|
|
if err != nil {
|
|
log.Errorf("Error parsing server URL %s: %v", server.URL, err)
|
|
return err
|
|
}
|
|
log.Debugf("Creating server %s at %s with weight %d", serverName, u, server.Weight)
|
|
if err := lb.UpsertServer(u, roundrobin.Weight(server.Weight)); err != nil {
|
|
log.Errorf("Error adding server %s to load balancer: %v", server.URL, err)
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func configureIPWhitelistMiddleware(whitelistSourceRanges []string) (negroni.Handler, error) {
|
|
if len(whitelistSourceRanges) > 0 {
|
|
ipSourceRanges := whitelistSourceRanges
|
|
ipWhitelistMiddleware, err := middlewares.NewIPWhitelister(ipSourceRanges)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return ipWhitelistMiddleware, nil
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func (server *Server) wireFrontendBackend(serverRoute *serverRoute, handler http.Handler) {
|
|
// path replace - This needs to always be the very last on the handler chain (first in the order in this function)
|
|
// -- Replacing Path should happen at the very end of the Modifier chain, after all the Matcher+Modifiers ran
|
|
if len(serverRoute.replacePath) > 0 {
|
|
handler = &middlewares.ReplacePath{
|
|
Path: serverRoute.replacePath,
|
|
Handler: handler,
|
|
}
|
|
}
|
|
|
|
// add prefix - This needs to always be right before ReplacePath on the chain (second in order in this function)
|
|
// -- Adding Path Prefix should happen after all *Strip Matcher+Modifiers ran, but before Replace (in case it's configured)
|
|
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,
|
|
}
|
|
}
|
|
|
|
// strip prefix with regex
|
|
if len(serverRoute.stripPrefixesRegex) > 0 {
|
|
handler = middlewares.NewStripPrefixRegex(handler, serverRoute.stripPrefixesRegex)
|
|
}
|
|
|
|
serverRoute.route.Handler(handler)
|
|
}
|
|
|
|
func (server *Server) loadEntryPointConfig(entryPointName string, entryPoint *configuration.EntryPoint) (negroni.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)
|
|
|
|
return rewrite, nil
|
|
}
|
|
|
|
func (server *Server) buildDefaultHTTPRouter() *mux.Router {
|
|
router := mux.NewRouter()
|
|
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
|
|
router.StrictSlash(true)
|
|
router.SkipClean(true)
|
|
return router
|
|
}
|
|
|
|
func parseHealthCheckOptions(lb healthcheck.LoadBalancer, backend string, hc *types.HealthCheck, hcConfig *configuration.HealthCheckConfig) *healthcheck.Options {
|
|
if hc == nil || hc.Path == "" || hcConfig == nil {
|
|
return nil
|
|
}
|
|
|
|
interval := time.Duration(hcConfig.Interval)
|
|
if hc.Interval != "" {
|
|
intervalOverride, err := time.ParseDuration(hc.Interval)
|
|
switch {
|
|
case err != nil:
|
|
log.Errorf("Illegal healthcheck interval for backend '%s': %s", backend, err)
|
|
case intervalOverride <= 0:
|
|
log.Errorf("Healthcheck interval smaller than zero for backend '%s', backend", backend)
|
|
default:
|
|
interval = intervalOverride
|
|
}
|
|
}
|
|
|
|
return &healthcheck.Options{
|
|
Path: hc.Path,
|
|
Port: hc.Port,
|
|
Interval: interval,
|
|
LB: lb,
|
|
}
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
func (server *Server) configureFrontends(frontends map[string]*types.Frontend) {
|
|
for _, frontend := range frontends {
|
|
// default endpoints if not defined in frontends
|
|
if len(frontend.EntryPoints) == 0 {
|
|
frontend.EntryPoints = server.globalConfiguration.DefaultEntryPoints
|
|
}
|
|
}
|
|
}
|
|
|
|
func (*Server) configureBackends(backends map[string]*types.Backend) {
|
|
for backendName, backend := range backends {
|
|
if backend.LoadBalancer != nil && backend.LoadBalancer.Sticky {
|
|
log.Warn("Deprecated configuration found: %s. Please use %s.", "backend.LoadBalancer.Sticky", "backend.LoadBalancer.Stickiness")
|
|
}
|
|
|
|
_, err := types.NewLoadBalancerMethod(backend.LoadBalancer)
|
|
if err == nil {
|
|
if backend.LoadBalancer != nil && backend.LoadBalancer.Stickiness == nil && backend.LoadBalancer.Sticky {
|
|
backend.LoadBalancer.Stickiness = &types.Stickiness{}
|
|
}
|
|
} else {
|
|
log.Debugf("Validation of load balancer method for backend %s failed: %s. Using default method wrr.", backendName, err)
|
|
|
|
var stickiness *types.Stickiness
|
|
if backend.LoadBalancer != nil {
|
|
if backend.LoadBalancer.Stickiness != nil {
|
|
stickiness = backend.LoadBalancer.Stickiness
|
|
} else if backend.LoadBalancer.Sticky {
|
|
if backend.LoadBalancer.Stickiness == nil {
|
|
stickiness = &types.Stickiness{}
|
|
}
|
|
}
|
|
}
|
|
backend.LoadBalancer = &types.LoadBalancer{
|
|
Method: "wrr",
|
|
Stickiness: stickiness,
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (server *Server) registerMetricClients(metricsConfig *types.Metrics) {
|
|
registries := []metrics.Registry{}
|
|
|
|
if metricsConfig.Prometheus != nil {
|
|
registries = append(registries, metrics.RegisterPrometheus(metricsConfig.Prometheus))
|
|
log.Debug("Configured Prometheus metrics")
|
|
}
|
|
if metricsConfig.Datadog != nil {
|
|
registries = append(registries, metrics.RegisterDatadog(metricsConfig.Datadog))
|
|
log.Debugf("Configured DataDog metrics pushing to %s once every %s", metricsConfig.Datadog.Address, metricsConfig.Datadog.PushInterval)
|
|
}
|
|
if metricsConfig.StatsD != nil {
|
|
registries = append(registries, metrics.RegisterStatsd(metricsConfig.StatsD))
|
|
log.Debugf("Configured StatsD metrics pushing to %s once every %s", metricsConfig.StatsD.Address, metricsConfig.StatsD.PushInterval)
|
|
}
|
|
|
|
if len(registries) > 0 {
|
|
server.metricsRegistry = metrics.NewMultiRegistry(registries)
|
|
}
|
|
}
|
|
|
|
func stopMetricsClients() {
|
|
metrics.StopDatadog()
|
|
metrics.StopStatsd()
|
|
}
|
|
|
|
func (server *Server) buildRateLimiter(handler http.Handler, rlConfig *types.RateLimit) (http.Handler, error) {
|
|
extractFunc, err := utils.NewExtractor(rlConfig.ExtractorFunc)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
log.Debugf("Creating load-balancer rate limiter")
|
|
rateSet := ratelimit.NewRateSet()
|
|
for _, rate := range rlConfig.RateSet {
|
|
if err := rateSet.Add(time.Duration(rate.Period), rate.Average, rate.Burst); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
return ratelimit.New(handler, extractFunc, rateSet, ratelimit.Logger(oxyLogger))
|
|
}
|
|
|
|
func (server *Server) buildRetryMiddleware(handler http.Handler, globalConfig configuration.GlobalConfiguration, countServers int, backendName string) http.Handler {
|
|
retryListeners := middlewares.RetryListeners{}
|
|
if server.metricsRegistry.IsEnabled() {
|
|
retryListeners = append(retryListeners, middlewares.NewMetricsRetryListener(server.metricsRegistry, backendName))
|
|
}
|
|
if server.accessLoggerMiddleware != nil {
|
|
retryListeners = append(retryListeners, &accesslog.SaveRetries{})
|
|
}
|
|
|
|
retryAttempts := countServers
|
|
if globalConfig.Retry.Attempts > 0 {
|
|
retryAttempts = globalConfig.Retry.Attempts
|
|
}
|
|
|
|
log.Debugf("Creating retries max attempts %d", retryAttempts)
|
|
|
|
return middlewares.NewRetry(retryAttempts, handler, retryListeners)
|
|
}
|