traefik/pkg/server/server.go

113 lines
2.4 KiB
Go
Raw Normal View History

package server
import (
2016-08-16 15:26:10 +00:00
"context"
"os"
"os/signal"
"time"
2019-08-03 01:58:23 +00:00
"github.com/containous/traefik/v2/pkg/log"
"github.com/containous/traefik/v2/pkg/metrics"
"github.com/containous/traefik/v2/pkg/middlewares/accesslog"
"github.com/containous/traefik/v2/pkg/safe"
"github.com/containous/traefik/v2/pkg/server/middleware"
)
// Server is the reverse-proxy/load-balancer engine
type Server struct {
watcher *ConfigurationWatcher
tcpEntryPoints TCPEntryPoints
chainBuilder *middleware.ChainBuilder
accessLoggerMiddleware *accesslog.Handler
2019-06-27 22:16:04 +00:00
signals chan os.Signal
stopChan chan bool
2019-06-27 22:16:04 +00:00
routinesPool *safe.Pool
2018-11-14 09:18:03 +00:00
}
// NewServer returns an initialized Server.
func NewServer(routinesPool *safe.Pool, entryPoints TCPEntryPoints, watcher *ConfigurationWatcher,
chainBuilder *middleware.ChainBuilder, accessLoggerMiddleware *accesslog.Handler) *Server {
srv := &Server{
watcher: watcher,
tcpEntryPoints: entryPoints,
chainBuilder: chainBuilder,
accessLoggerMiddleware: accessLoggerMiddleware,
signals: make(chan os.Signal, 1),
stopChan: make(chan bool, 1),
routinesPool: routinesPool,
2019-09-06 13:08:04 +00:00
}
srv.configureSignals()
2018-11-14 09:18:03 +00:00
return srv
}
// Start starts the server and Stop/Close it when context is Done
func (s *Server) Start(ctx context.Context) {
go func() {
defer s.Close()
<-ctx.Done()
logger := log.FromContext(ctx)
logger.Info("I have to go...")
logger.Info("Stopping server gracefully")
s.Stop()
}()
s.tcpEntryPoints.Start()
s.watcher.Start()
2018-09-06 12:24:03 +00:00
s.routinesPool.Go(func(stop chan bool) {
s.listenSignals(stop)
})
}
// Wait blocks until the server shutdown.
2017-11-24 18:18:03 +00:00
func (s *Server) Wait() {
<-s.stopChan
}
// Stop stops the server
2017-11-24 18:18:03 +00:00
func (s *Server) Stop() {
2018-11-14 09:18:03 +00:00
defer log.WithoutContext().Info("Server stopped")
s.tcpEntryPoints.Stop()
2018-11-14 09:18:03 +00:00
2017-11-24 18:18:03 +00:00
s.stopChan <- true
}
// Close destroys the server
2017-11-24 18:18:03 +00:00
func (s *Server) Close() {
2018-03-14 12:14:03 +00:00
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
go func(ctx context.Context) {
<-ctx.Done()
if ctx.Err() == context.Canceled {
return
} else if ctx.Err() == context.DeadlineExceeded {
2018-03-14 12:14:03 +00:00
panic("Timeout while stopping traefik, killing instance ✝")
}
}(ctx)
2018-11-14 09:18:03 +00:00
stopMetricsClients()
2017-11-24 18:18:03 +00:00
s.routinesPool.Cleanup()
2017-11-24 18:18:03 +00:00
signal.Stop(s.signals)
close(s.signals)
2018-11-14 09:18:03 +00:00
close(s.stopChan)
2018-11-14 09:18:03 +00:00
s.chainBuilder.Close()
2018-11-14 09:18:03 +00:00
cancel()
}
func stopMetricsClients() {
metrics.StopDatadog()
metrics.StopStatsd()
metrics.StopInfluxDB()
}