115 lines
2.5 KiB
Go
115 lines
2.5 KiB
Go
package server
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import (
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"context"
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"errors"
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"os"
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"os/signal"
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"time"
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"github.com/traefik/traefik/v2/pkg/log"
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"github.com/traefik/traefik/v2/pkg/metrics"
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"github.com/traefik/traefik/v2/pkg/middlewares/accesslog"
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"github.com/traefik/traefik/v2/pkg/safe"
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"github.com/traefik/traefik/v2/pkg/server/middleware"
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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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watcher *ConfigurationWatcher
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tcpEntryPoints TCPEntryPoints
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udpEntryPoints UDPEntryPoints
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chainBuilder *middleware.ChainBuilder
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accessLoggerMiddleware *accesslog.Handler
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signals chan os.Signal
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stopChan chan bool
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routinesPool *safe.Pool
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}
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// NewServer returns an initialized Server.
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func NewServer(routinesPool *safe.Pool, entryPoints TCPEntryPoints, entryPointsUDP UDPEntryPoints, watcher *ConfigurationWatcher,
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chainBuilder *middleware.ChainBuilder, accessLoggerMiddleware *accesslog.Handler,
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) *Server {
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srv := &Server{
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watcher: watcher,
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tcpEntryPoints: entryPoints,
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chainBuilder: chainBuilder,
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accessLoggerMiddleware: accessLoggerMiddleware,
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signals: make(chan os.Signal, 1),
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stopChan: make(chan bool, 1),
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routinesPool: routinesPool,
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udpEntryPoints: entryPointsUDP,
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}
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srv.configureSignals()
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return srv
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}
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// Start starts the server and Stop/Close it when context is Done.
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func (s *Server) Start(ctx context.Context) {
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go func() {
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<-ctx.Done()
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logger := log.FromContext(ctx)
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logger.Info("I have to go...")
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logger.Info("Stopping server gracefully")
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s.Stop()
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}()
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s.tcpEntryPoints.Start()
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s.udpEntryPoints.Start()
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s.watcher.Start()
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s.routinesPool.GoCtx(s.listenSignals)
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}
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// Wait blocks until the server shutdown.
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func (s *Server) Wait() {
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<-s.stopChan
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}
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// Stop stops the server.
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func (s *Server) Stop() {
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defer log.WithoutContext().Info("Server stopped")
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s.tcpEntryPoints.Stop()
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s.udpEntryPoints.Stop()
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s.stopChan <- true
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}
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// Close destroys the server.
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func (s *Server) Close() {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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go func(ctx context.Context) {
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<-ctx.Done()
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if errors.Is(ctx.Err(), context.Canceled) {
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return
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} else if errors.Is(ctx.Err(), context.DeadlineExceeded) {
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panic("Timeout while stopping traefik, killing instance ✝")
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}
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}(ctx)
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stopMetricsClients()
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s.routinesPool.Stop()
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signal.Stop(s.signals)
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close(s.signals)
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close(s.stopChan)
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s.chainBuilder.Close()
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cancel()
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}
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func stopMetricsClients() {
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metrics.StopDatadog()
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metrics.StopStatsd()
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metrics.StopInfluxDB()
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}
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