Update main.go, controlSocket.go, and 2 more files...

api/main.go

@@ -47,7 +47,7 @@ func main() {
 		}
 
 		harOutputChannel := tap.StartPassiveTapper()
-		socketConnection, err := shared.ConnectToSocketServer(*aggregatorAddress)
+		socketConnection, err := shared.ConnectToSocketServer(*aggregatorAddress, shared.DEFAULT_SOCKET_RETRIES, shared.DEFAULT_SOCKET_RETRY_SLEEP_TIME, false)
 		if err != nil {
 			panic(fmt.Sprintf("Error connecting to socket server at %s %v", *aggregatorAddress, err))
 		}

cli/mizu/controlSocket.go

@@ -5,6 +5,7 @@ import (
 	"github.com/gorilla/websocket"
 	"github.com/up9inc/mizu/shared"
 	core "k8s.io/api/core/v1"
+	"time"
 )
 
 type ControlSocket struct {
@@ -12,7 +13,7 @@ type ControlSocket struct {
 }
 
 func CreateControlSocket(socketServerAddress string) (*ControlSocket, error) {
-	connection, err := shared.ConnectToSocketServer(socketServerAddress)
+	connection, err := shared.ConnectToSocketServer(socketServerAddress, 30, 2 * time.Second, true)
 	if err != nil {
 		return nil, err
 	} else {

cli/mizu/mizuRunner.go

@@ -13,6 +13,8 @@ import (
 	"time"
 )
 
+var currentlyTappedPods []core.Pod
+
 func Run(podRegexQuery *regexp.Regexp) {
 	kubernetesProvider := kubernetes.NewProvider(config.Configuration.KubeConfigPath, config.Configuration.Namespace)
 	ctx, cancel := context.WithCancel(context.Background())
@@ -23,6 +25,7 @@ func Run(podRegexQuery *regexp.Regexp) {
 		fmt.Printf("Error getting pods to tap %v\n", err)
 		return
 	}
+	currentlyTappedPods = matchingPods
 
 	nodeToTappedPodIPMap, err := getNodeHostToTappedPodIpsMap(ctx, kubernetesProvider, matchingPods)
 	if err != nil {
@@ -35,18 +38,7 @@ func Run(podRegexQuery *regexp.Regexp) {
 		return
 	}
 	go portForwardApiPod(ctx, kubernetesProvider, cancel) //TODO convert this to job for built in pod ttl or have the running app handle this
-
-	controlSocket, err := CreateControlSocket(fmt.Sprintf("ws://localhost:%d/ws", config.Configuration.GuiPort))
-	if err != nil {
-		fmt.Printf("error establishing control socket connection %s\n", err)
-		cancel()
-	}
-	time.Sleep(2 * time.Second)
-	err = controlSocket.SendNewTappedPodsListMessage(kubernetesProvider.Namespace, matchingPods)
-	if err != nil {
-		fmt.Printf("error Sending message via control socket %s\n", err)
-	}
-
+	go syncApiStatus(ctx, cancel, kubernetesProvider.Namespace)
 	waitForFinish(ctx, cancel)                                                                                                                //block until exit signal or error
 
 	// TODO handle incoming traffic from tapper using a channel
@@ -200,3 +192,25 @@ func waitForFinish(ctx context.Context, cancel context.CancelFunc) {
 		cancel()
 	}
 }
+
+func syncApiStatus(ctx context.Context, cancel context.CancelFunc, namespace string) {
+	controlSocket, err := CreateControlSocket(fmt.Sprintf("ws://localhost:%d/ws", config.Configuration.GuiPort))
+	if err != nil {
+		fmt.Printf("error establishing control socket connection %s\n", err)
+		cancel()
+	}
+
+	for {
+		select {
+		case <- ctx.Done():
+			return
+		default:
+			err = controlSocket.SendNewTappedPodsListMessage(namespace, currentlyTappedPods)
+			if err != nil {
+				fmt.Printf("error Sending message via control socket %s\n", err)
+			}
+			time.Sleep(5 * time.Second)
+		}
+	}
+
+}

shared/socket_client.go

@@ -1,28 +1,34 @@
 package shared
 
 import (
+	"fmt"
 	"github.com/gorilla/websocket"
 	"time"
 )
 
-func ConnectToSocketServer(address string) (*websocket.Conn, error) {
-	const maxTry = 5
-	const sleepTime = time.Second * 2
+const (
+	DEFAULT_SOCKET_RETRIES = 3
+	DEFAULT_SOCKET_RETRY_SLEEP_TIME = time.Second * 10
+)
+
+func ConnectToSocketServer(address string, retries int, retrySleepTime time.Duration, hideTimeoutErrors bool) (*websocket.Conn, error) {
 	var err error
 	var connection *websocket.Conn
 	try := 0
 
 	// Connection to server fails if client pod is up before server.
 	// Retries solve this issue.
-	for try < maxTry {
+	for try < retries {
 		connection, _, err = websocket.DefaultDialer.Dial(address, nil)
 		if err != nil {
 			try++
-			// fmt.Printf("Failed connecting to websocket server: %s, (%v,%+v)\n", err, err, err)
+			if !hideTimeoutErrors {
+				fmt.Printf("Failed connecting to websocket server: %s, (%v,%+v)\n", err, err, err)
+			}
 		} else {
 			break
 		}
-		time.Sleep(sleepTime)
+		time.Sleep(retrySleepTime)
 	}
 
 	if err != nil {