Merge pull request #654 from erikwilson/cleanup-tunnel

Cleanup tunnel

pkg/agent/tunnel/tunnel.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"reflect"
 	"sync"
 	"time"
 
@@ -80,7 +81,7 @@ func Setup(ctx context.Context, config *config.Node) error {
 	wg := &sync.WaitGroup{}
 	for _, address := range addresses {
 		if _, ok := disconnect[address]; !ok {
-			disconnect[address] = connect(wg, address, config, transportConfig)
+			disconnect[address] = connect(ctx, wg, address, config, transportConfig)
 		}
 	}
 
@@ -101,7 +102,10 @@ func Setup(ctx context.Context, config *config.Node) error {
 				select {
 				case ev, ok := <-watch.ResultChan():
 					if !ok || ev.Type == watchtypes.Error {
-						logrus.Errorf("Tunnel endpoint watch channel closed: %v", ev)
+						if ok {
+							logrus.Errorf("Tunnel endpoint watch channel closed: %v", ev)
+						}
+						watch.Stop()
 						continue connect
 					}
 					endpoint, ok := ev.Object.(*v1.Endpoints)
@@ -110,7 +114,11 @@ func Setup(ctx context.Context, config *config.Node) error {
 						continue watching
 					}
 
-					var addresses = getAddresses(endpoint)
+					newAddresses := getAddresses(endpoint)
+					if reflect.DeepEqual(newAddresses, addresses) {
+						continue watching
+					}
+					addresses = newAddresses
 					logrus.Infof("Tunnel endpoint watch event: %v", addresses)
 
 					validEndpoint := map[string]bool{}
@@ -118,7 +126,7 @@ func Setup(ctx context.Context, config *config.Node) error {
 					for _, address := range addresses {
 						validEndpoint[address] = true
 						if _, ok := disconnect[address]; !ok {
-							disconnect[address] = connect(nil, address, config, transportConfig)
+							disconnect[address] = connect(ctx, nil, address, config, transportConfig)
 						}
 					}
 
@@ -126,6 +134,7 @@ func Setup(ctx context.Context, config *config.Node) error {
 						if !validEndpoint[address] {
 							cancel()
 							delete(disconnect, address)
+							logrus.Infof("Stopped tunnel to %s", address)
 						}
 					}
 				}
@@ -149,7 +158,7 @@ func Setup(ctx context.Context, config *config.Node) error {
 	return nil
 }
 
-func connect(waitGroup *sync.WaitGroup, address string, config *config.Node, transportConfig *transport.Config) context.CancelFunc {
+func connect(rootCtx context.Context, waitGroup *sync.WaitGroup, address string, config *config.Node, transportConfig *transport.Config) context.CancelFunc {
 	wsURL := fmt.Sprintf("wss://%s/v1-k3s/connect", address)
 	headers := map[string][]string{
 		"X-K3s-NodeName": {config.AgentConfig.NodeName},
@@ -175,7 +184,7 @@ func connect(waitGroup *sync.WaitGroup, address string, config *config.Node, tra
 		waitGroup.Add(1)
 	}
 
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(rootCtx)
 
 	go func() {
 		for {
@@ -193,7 +202,6 @@ func connect(waitGroup *sync.WaitGroup, address string, config *config.Node, tra
 				if waitGroup != nil {
 					once.Do(waitGroup.Done)
 				}
-				logrus.Infof("Stopped tunnel to %s", wsURL)
 				return
 			}
 		}

trash.lock

@@ -142,7 +142,7 @@ import:
 - package: github.com/hashicorp/golang-lru
   version: v0.5.0
 - package: github.com/ibuildthecloud/kvsql
-  version: 79f1f6881e28b90976f070aad6edad8e259057c1
+  version: 9f00ccc82235f0433c736306d091abd2939b7449
   repo: https://github.com/erikwilson/rancher-kvsql.git
 - package: github.com/imdario/mergo
   version: v0.3.5
@@ -230,7 +230,8 @@ import:
 - package: github.com/rancher/helm-controller
   version: v0.2.1
 - package: github.com/rancher/remotedialer
-  version: 4a5a661be67697d6369df54ef62d5a30b0385697
+  version: 7c71ffa8f5d7a181704d92bb8a33b0c7d07dccaa
+  repo: https://github.com/erikwilson/rancher-remotedialer.git
 - package: github.com/rancher/wrangler
   version: 7737c167e16514a38229bc64c839cee8cd14e6d3
 - package: github.com/rancher/wrangler-api

vendor.conf

@@ -14,7 +14,7 @@ k8s.io/kubernetes                   v1.14.4-k3s.1                             ht
 github.com/rancher/wrangler         7737c167e16514a38229bc64c839cee8cd14e6d3
 github.com/rancher/wrangler-api     v0.1.4
 github.com/rancher/dynamiclistener  c08b499d17195fbc2c1764b21c322951811629a5  https://github.com/erikwilson/rancher-dynamiclistener.git
-github.com/rancher/remotedialer     4a5a661be67697d6369df54ef62d5a30b0385697
+github.com/rancher/remotedialer     7c71ffa8f5d7a181704d92bb8a33b0c7d07dccaa  https://github.com/erikwilson/rancher-remotedialer.git
 github.com/rancher/helm-controller  v0.2.1
 github.com/matryer/moq              ee5226d43009                              https://github.com/rancher/moq.git
 github.com/coreos/flannel           823afe66b2266bf71f5bec24e6e28b26d70cfc7c  https://github.com/ibuildthecloud/flannel.git

vendor/github.com/rancher/remotedialer/client.go

@@ -18,7 +18,7 @@ func ClientConnect(ctx context.Context, wsURL string, headers http.Header, diale
 	}
 }
 
-func connectToProxy(ctx context.Context, proxyURL string, headers http.Header, auth ConnectAuthorizer, dialer *websocket.Dialer, onConnect func(context.Context) error) error {
+func connectToProxy(rootCtx context.Context, proxyURL string, headers http.Header, auth ConnectAuthorizer, dialer *websocket.Dialer, onConnect func(context.Context) error) error {
 	logrus.WithField("url", proxyURL).Info("Connecting to proxy")
 
 	if dialer == nil {
@@ -31,11 +31,11 @@ func connectToProxy(ctx context.Context, proxyURL string, headers http.Header, a
 	}
 	defer ws.Close()
 
-	if onConnect != nil {
-		ctxOnConnect, cancel := context.WithCancel(context.Background())
-		defer cancel()
+	ctx, cancel := context.WithCancel(rootCtx)
+	defer cancel()
 
-		if err := onConnect(ctxOnConnect); err != nil {
+	if onConnect != nil {
+		if err := onConnect(ctx); err != nil {
 			return err
 		}
 	}
@@ -45,7 +45,7 @@ func connectToProxy(ctx context.Context, proxyURL string, headers http.Header, a
 
 	result := make(chan error, 1)
 	go func() {
-		_, err = session.Serve()
+		_, err = session.Serve(ctx)
 		result <- err
 	}()
 

vendor/github.com/rancher/remotedialer/peer.go

@@ -106,7 +106,7 @@ outer:
 		}
 
 		s.sessions.addListener(session)
-		_, err = session.Serve()
+		_, err = session.Serve(context.Background())
 		s.sessions.removeListener(session)
 		session.Close()
 

vendor/github.com/rancher/remotedialer/server.go

@@ -1,6 +1,7 @@
 package remotedialer
 
 import (
+	"context"
 	"net/http"
 	"sync"
 	"time"
@@ -71,7 +72,7 @@ func (s *Server) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 	defer s.sessions.remove(session)
 
 	// Don't need to associate req.Context() to the Session, it will cancel otherwise
-	code, err := session.Serve()
+	code, err := session.Serve(context.Background())
 	if err != nil {
 		// Hijacked so we can't write to the client
 		logrus.Infof("error in remotedialer server [%d]: %v", code, err)

vendor/github.com/rancher/remotedialer/session.go

@@ -63,8 +63,8 @@ func newSession(sessionKey int64, clientKey string, conn *websocket.Conn) *Sessi
 	}
 }
 
-func (s *Session) startPings() {
-	ctx, cancel := context.WithCancel(context.Background())
+func (s *Session) startPings(rootCtx context.Context) {
+	ctx, cancel := context.WithCancel(rootCtx)
 	s.pingCancel = cancel
 	s.pingWait.Add(1)
 
@@ -99,9 +99,9 @@ func (s *Session) stopPings() {
 	s.pingWait.Wait()
 }
 
-func (s *Session) Serve() (int, error) {
+func (s *Session) Serve(ctx context.Context) (int, error) {
 	if s.client {
-		s.startPings()
+		s.startPings(ctx)
 	}
 
 	for {