support linkerd (#547)

* support linkerd - initial commit

* renaming readEnvironmentVariable

acceptanceTests/testsUtils.go

@@ -304,11 +304,10 @@ func cleanupCommand(cmd *exec.Cmd) error {
 }
 
 func getPods(tapStatusInterface interface{}) ([]map[string]interface{}, error) {
-	tapStatus := tapStatusInterface.(map[string]interface{})
-	podsInterface := tapStatus["pods"].([]interface{})
+	tapPodsInterface := tapStatusInterface.([]interface{})
 
 	var pods []map[string]interface{}
-	for _, podInterface := range podsInterface {
+	for _, podInterface := range tapPodsInterface {
 		pods = append(pods, podInterface.(map[string]interface{}))
 	}
 

agent/go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/djherbis/atime v1.0.0
 	github.com/getkin/kin-openapi v0.76.0
 	github.com/gin-contrib/static v0.0.1
-	github.com/gin-gonic/gin v1.7.2
+	github.com/gin-gonic/gin v1.7.7
 	github.com/go-playground/locales v0.13.0
 	github.com/go-playground/universal-translator v0.17.0
 	github.com/go-playground/validator/v10 v10.5.0

agent/go.sum

@@ -125,6 +125,8 @@ github.com/gin-contrib/static v0.0.1/go.mod h1:CSxeF+wep05e0kCOsqWdAWbSszmc31zTI
 github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
 github.com/gin-gonic/gin v1.7.2 h1:Tg03T9yM2xa8j6I3Z3oqLaQRSmKvxPd6g/2HJ6zICFA=
 github.com/gin-gonic/gin v1.7.2/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
+github.com/gin-gonic/gin v1.7.7 h1:3DoBmSbJbZAWqXJC3SLjAPfutPJJRN1U5pALB7EeTTs=
+github.com/gin-gonic/gin v1.7.7/go.mod h1:axIBovoeJpVj8S3BwE0uPMTeReE4+AfFtqpqaZ1qq1U=
 github.com/globalsign/mgo v0.0.0-20180905125535-1ca0a4f7cbcb/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
 github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=

agent/main.go

@@ -465,14 +465,15 @@ func startMizuTapperSyncer(ctx context.Context, provider *kubernetes.Provider) (
 					logger.Log.Debug("mizuTapperSyncer pod changes channel closed, ending listener loop")
 					return
 				}
-				tapStatus := shared.TapStatus{Pods: kubernetes.GetPodInfosForPods(tapperSyncer.CurrentlyTappedPods)}
+				providers.TapStatus = shared.TapStatus{Pods: kubernetes.GetPodInfosForPods(tapperSyncer.CurrentlyTappedPods)}
 
-				serializedTapStatus, err := json.Marshal(shared.CreateWebSocketStatusMessage(tapStatus))
+				tappedPodsStatus := utils.GetTappedPodsStatus()
+
+				serializedTapStatus, err := json.Marshal(shared.CreateWebSocketStatusMessage(tappedPodsStatus))
 				if err != nil {
 					logger.Log.Fatalf("error serializing tap status: %v", err)
 				}
 				api.BroadcastToBrowserClients(serializedTapStatus)
-				providers.TapStatus.Pods = tapStatus.Pods
 				providers.ExpectedTapperAmount = tapPodChangeEvent.ExpectedTapperAmount
 			case tapperStatus, ok := <-tapperSyncer.TapperStatusChangedOut:
 				if !ok {

agent/pkg/api/socket_server_handlers.go

@@ -83,7 +83,6 @@ func (h *RoutesEventHandlers) WebSocketMessage(_ int, message []byte) {
 			if err != nil {
 				logger.Log.Infof("Could not unmarshal message of message type %s %v", socketMessageBase.MessageType, err)
 			} else {
-				providers.TapStatus.Pods = statusMessage.TappingStatus.Pods
 				BroadcastToBrowserClients(message)
 			}
 		case shared.WebsocketMessageTypeOutboundLink:

agent/pkg/controllers/status_controller.go

@@ -3,17 +3,17 @@ package controllers
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/gin-gonic/gin"
+	"github.com/up9inc/mizu/shared"
+	"github.com/up9inc/mizu/shared/logger"
 	"mizuserver/pkg/api"
 	"mizuserver/pkg/config"
 	"mizuserver/pkg/holder"
 	"mizuserver/pkg/providers"
 	"mizuserver/pkg/up9"
+	"mizuserver/pkg/utils"
 	"mizuserver/pkg/validation"
 	"net/http"
-
-	"github.com/gin-gonic/gin"
-	"github.com/up9inc/mizu/shared"
-	"github.com/up9inc/mizu/shared/logger"
 )
 
 func HealthCheck(c *gin.Context) {
@@ -49,7 +49,13 @@ func PostTappedPods(c *gin.Context) {
 	}
 	logger.Log.Infof("[Status] POST request: %d tapped pods", len(tapStatus.Pods))
 	providers.TapStatus.Pods = tapStatus.Pods
-	message := shared.CreateWebSocketStatusMessage(*tapStatus)
+	broadcastTappedPodsStatus()
+}
+
+func broadcastTappedPodsStatus() {
+	tappedPodsStatus := utils.GetTappedPodsStatus()
+
+	message := shared.CreateWebSocketStatusMessage(tappedPodsStatus)
 	if jsonBytes, err := json.Marshal(message); err != nil {
 		logger.Log.Errorf("Could not Marshal message %v", err)
 	} else {
@@ -72,6 +78,7 @@ func PostTapperStatus(c *gin.Context) {
 		providers.TappersStatus = make(map[string]shared.TapperStatus)
 	}
 	providers.TappersStatus[tapperStatus.NodeName] = *tapperStatus
+	broadcastTappedPodsStatus()
 }
 
 func GetTappersCount(c *gin.Context) {
@@ -89,7 +96,8 @@ func GetAuthStatus(c *gin.Context) {
 }
 
 func GetTappingStatus(c *gin.Context) {
-	c.JSON(http.StatusOK, providers.TapStatus)
+	tappedPodsStatus := utils.GetTappedPodsStatus()
+	c.JSON(http.StatusOK, tappedPodsStatus)
 }
 
 func AnalyzeInformation(c *gin.Context) {

agent/pkg/utils/utils.go

@@ -3,11 +3,12 @@ package utils
 import (
 	"context"
 	"fmt"
+	"mizuserver/pkg/providers"
 	"net/http"
 	"net/url"
 	"os"
 	"os/signal"
-	"reflect"
+	"strings"
 	"syscall"
 	"time"
 
@@ -44,15 +45,13 @@ func StartServer(app *gin.Engine) {
 	}
 }
 
-func ReverseSlice(data interface{}) {
-	value := reflect.ValueOf(data)
-	valueLen := value.Len()
-	for i := 0; i <= int((valueLen-1)/2); i++ {
-		reverseIndex := valueLen - 1 - i
-		tmp := value.Index(reverseIndex).Interface()
-		value.Index(reverseIndex).Set(value.Index(i))
-		value.Index(i).Set(reflect.ValueOf(tmp))
+func GetTappedPodsStatus() []shared.TappedPodStatus {
+	tappedPodsStatus := make([]shared.TappedPodStatus, 0)
+	for _, pod := range providers.TapStatus.Pods {
+		isTapped := strings.ToLower(providers.TappersStatus[pod.NodeName].Status) == "started"
+		tappedPodsStatus = append(tappedPodsStatus, shared.TappedPodStatus{Name: pod.Name, Namespace: pod.Namespace, IsTapped: isTapped})
 	}
+	return tappedPodsStatus
 }
 
 func CheckErr(e error) {

cli/cmd/tapRunner.go

@@ -5,11 +5,12 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
-	"k8s.io/apimachinery/pkg/util/intstr"
 	"regexp"
 	"strings"
 	"time"
 
+	"k8s.io/apimachinery/pkg/util/intstr"
+
 	"github.com/getkin/kin-openapi/openapi3"
 	"gopkg.in/yaml.v3"
 	core "k8s.io/api/core/v1"
@@ -151,6 +152,7 @@ func RunMizuTap() {
 	} else {
 		defer finishMizuExecution(kubernetesProvider, apiProvider)
 
+		go goUtils.HandleExcWrapper(watchApiServerEvents, ctx, kubernetesProvider, cancel)
 		go goUtils.HandleExcWrapper(watchApiServerPod, ctx, kubernetesProvider, cancel)
 
 		// block until exit signal or error
@@ -159,10 +161,6 @@ func RunMizuTap() {
 }
 
 func handleDaemonModePostCreation(ctx context.Context, cancel context.CancelFunc, kubernetesProvider *kubernetes.Provider, namespaces []string) error {
-	if err := printTappedPodsPreview(ctx, kubernetesProvider, namespaces); err != nil {
-		return err
-	}
-
 	apiProvider := apiserver.NewProvider(GetApiServerUrl(), 90, 1*time.Second)
 
 	if err := waitForDaemonModeToBeReady(cancel, kubernetesProvider, apiProvider); err != nil {
@@ -192,7 +190,6 @@ func printTappedPodsPreview(ctx context.Context, kubernetesProvider *kubernetes.
 }
 
 func waitForDaemonModeToBeReady(cancel context.CancelFunc, kubernetesProvider *kubernetes.Provider, apiProvider *apiserver.Provider) error {
-	logger.Log.Info("Waiting for mizu to be ready... (may take a few minutes)")
 	go startProxyReportErrorIfAny(kubernetesProvider, cancel)
 
 	// TODO: TRA-3903 add a smarter test to see that tapping/pod watching is functioning properly
@@ -564,6 +561,67 @@ func waitUntilNamespaceDeleted(ctx context.Context, cancel context.CancelFunc, k
 }
 
 func watchApiServerPod(ctx context.Context, kubernetesProvider *kubernetes.Provider, cancel context.CancelFunc) {
+	podExactRegex := regexp.MustCompile(fmt.Sprintf("^%s$", kubernetes.ApiServerPodName))
+	podWatchHelper := kubernetes.NewPodWatchHelper(kubernetesProvider, podExactRegex)
+	eventChan, errorChan := kubernetes.FilteredWatch(ctx, podWatchHelper, []string{config.Config.MizuResourcesNamespace}, podWatchHelper)
+	isPodReady := false
+	timeAfter := time.After(25 * time.Second)
+	for {
+		select {
+		case wEvent, ok := <-eventChan:
+			if !ok {
+				eventChan = nil
+				continue
+			}
+
+			switch wEvent.Type {
+			case kubernetes.EventAdded:
+				logger.Log.Debugf("Watching API Server pod loop, added")
+			case kubernetes.EventDeleted:
+				logger.Log.Infof("%s removed", kubernetes.ApiServerPodName)
+				cancel()
+				return
+			case kubernetes.EventModified:
+				modifiedPod, err := wEvent.ToPod()
+				if err != nil {
+					logger.Log.Errorf(uiUtils.Error, err)
+					cancel()
+					continue
+				}
+
+				logger.Log.Debugf("Watching API Server pod loop, modified: %v", modifiedPod.Status.Phase)
+
+				if modifiedPod.Status.Phase == core.PodRunning && !isPodReady {
+					isPodReady = true
+					postApiServerStarted(ctx, kubernetesProvider, cancel, err)
+				}
+			case kubernetes.EventBookmark:
+				break
+			case kubernetes.EventError:
+				break
+			}
+		case err, ok := <-errorChan:
+			if !ok {
+				errorChan = nil
+				continue
+			}
+
+			logger.Log.Errorf("[ERROR] Agent creation, watching %v namespace, error: %v", config.Config.MizuResourcesNamespace, err)
+			cancel()
+
+		case <-timeAfter:
+			if !isPodReady {
+				logger.Log.Errorf(uiUtils.Error, "Mizu API server was not ready in time")
+				cancel()
+			}
+		case <-ctx.Done():
+			logger.Log.Debugf("Watching API Server pod loop, ctx done")
+			return
+		}
+	}
+}
+
+func watchApiServerEvents(ctx context.Context, kubernetesProvider *kubernetes.Provider, cancel context.CancelFunc) {
 	podExactRegex := regexp.MustCompile(fmt.Sprintf("^%s", kubernetes.ApiServerPodName))
 	eventWatchHelper := kubernetes.NewEventWatchHelper(kubernetesProvider, podExactRegex, "pod")
 	eventChan, errorChan := kubernetes.FilteredWatch(ctx, eventWatchHelper, []string{config.Config.MizuResourcesNamespace}, eventWatchHelper)
@@ -594,26 +652,7 @@ func watchApiServerPod(ctx context.Context, kubernetesProvider *kubernetes.Provi
 					event.Note))
 
 			switch event.Reason {
-			case "Started":
-				go startProxyReportErrorIfAny(kubernetesProvider, cancel)
-
-				url := GetApiServerUrl()
-				if err := apiProvider.TestConnection(); err != nil {
-					logger.Log.Errorf(uiUtils.Error, fmt.Sprintf("Couldn't connect to API server, for more info check logs at %s", fsUtils.GetLogFilePath()))
-					cancel()
-					break
-				}
-				options, _ := getMizuApiFilteringOptions()
-				if err = startTapperSyncer(ctx, cancel, kubernetesProvider, state.targetNamespaces, *options, state.startTime); err != nil {
-					logger.Log.Errorf(uiUtils.Error, fmt.Sprintf("Error starting mizu tapper syncer: %v", err))
-					cancel()
-				}
-
-				logger.Log.Infof("Mizu is available at %s", url)
-				if !config.Config.HeadlessMode {
-					uiUtils.OpenBrowser(url)
-				}
-			case "FailedScheduling", "Failed", "Killing":
+			case "FailedScheduling", "Failed":
 				logger.Log.Errorf(uiUtils.Error, fmt.Sprintf("Mizu API Server status: %s - %s", event.Reason, event.Note))
 				cancel()
 				break
@@ -632,6 +671,27 @@ func watchApiServerPod(ctx context.Context, kubernetesProvider *kubernetes.Provi
 	}
 }
 
+func postApiServerStarted(ctx context.Context, kubernetesProvider *kubernetes.Provider, cancel context.CancelFunc, err error) {
+	go startProxyReportErrorIfAny(kubernetesProvider, cancel)
+
+	url := GetApiServerUrl()
+	if err := apiProvider.TestConnection(); err != nil {
+		logger.Log.Errorf(uiUtils.Error, fmt.Sprintf("Couldn't connect to API server, for more info check logs at %s", fsUtils.GetLogFilePath()))
+		cancel()
+		return
+	}
+	options, _ := getMizuApiFilteringOptions()
+	if err = startTapperSyncer(ctx, cancel, kubernetesProvider, state.targetNamespaces, *options, state.startTime); err != nil {
+		logger.Log.Errorf(uiUtils.Error, fmt.Sprintf("Error starting mizu tapper syncer: %v", err))
+		cancel()
+	}
+
+	logger.Log.Infof("Mizu is available at %s", url)
+	if !config.Config.HeadlessMode {
+		uiUtils.OpenBrowser(url)
+	}
+}
+
 func getNamespaces(kubernetesProvider *kubernetes.Provider) []string {
 	if config.Config.Tap.AllNamespaces {
 		return []string{kubernetes.K8sAllNamespaces}

shared/models.go

@@ -64,7 +64,7 @@ type AnalyzeStatus struct {
 
 type WebSocketStatusMessage struct {
 	*WebSocketMessageMetadata
-	TappingStatus TapStatus `json:"tappingStatus"`
+	TappingStatus []TappedPodStatus `json:"tappingStatus"`
 }
 
 type TapperStatus struct {
@@ -73,9 +73,14 @@ type TapperStatus struct {
 	Status     string `json:"status"`
 }
 
+type TappedPodStatus struct {
+	Name      string `json:"name"`
+	Namespace string `json:"namespace"`
+	IsTapped  bool   `json:"isTapped"`
+}
+
 type TapStatus struct {
-	Pods     []PodInfo     `json:"pods"`
-	TLSLinks []TLSLinkInfo `json:"tlsLinks"`
+	Pods []PodInfo `json:"pods"`
 }
 
 type PodInfo struct {
@@ -98,12 +103,12 @@ type SyncEntriesConfig struct {
 	UploadIntervalSec int    `json:"interval"`
 }
 
-func CreateWebSocketStatusMessage(tappingStatus TapStatus) WebSocketStatusMessage {
+func CreateWebSocketStatusMessage(tappedPodsStatus []TappedPodStatus) WebSocketStatusMessage {
 	return WebSocketStatusMessage{
 		WebSocketMessageMetadata: &WebSocketMessageMetadata{
 			MessageType: WebSocketMessageTypeUpdateStatus,
 		},
-		TappingStatus: tappingStatus,
+		TappingStatus: tappedPodsStatus,
 	}
 }
 

tap/extensions/amqp/helpers.go

@@ -579,12 +579,18 @@ func representConnectionStart(event map[string]interface{}) []interface{} {
 }
 
 func representConnectionClose(event map[string]interface{}) []interface{} {
+	replyCode := ""
+
+	if event["replyCode"] != nil {
+		replyCode = fmt.Sprintf("%g", event["replyCode"].(float64))
+	}
+
 	rep := make([]interface{}, 0)
 
 	details, _ := json.Marshal([]api.TableData{
 		{
 			Name:     "Reply Code",
-			Value:    fmt.Sprintf("%g", event["replyCode"].(float64)),
+			Value:    replyCode,
 			Selector: `request.replyCode`,
 		},
 		{

tap/source/discoverer_util.go

@@ -0,0 +1,38 @@
+package source
+
+import (
+	"io/ioutil"
+	"regexp"
+	"strings"
+
+	"github.com/up9inc/mizu/shared/logger"
+)
+
+var numberRegex = regexp.MustCompile("[0-9]+")
+
+func getSingleValueFromEnvironmentVariableFile(filePath string, variableName string) (string, error) {
+	bytes, err := ioutil.ReadFile(filePath)
+
+	if err != nil {
+		logger.Log.Warningf("Error reading environment file %v - %v", filePath, err)
+		return "", err
+	}
+
+	envs := strings.Split(string(bytes), string([]byte{0}))
+
+	for _, env := range envs {
+		if !strings.Contains(env, "=") {
+			continue
+		}
+
+		parts := strings.Split(env, "=")
+		varName := parts[0]
+		value := parts[1]
+
+		if variableName == varName {
+			return value, nil
+		}
+	}
+
+	return "", nil
+}

tap/source/envoy_discoverer.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"regexp"
 	"strings"
 
 	"github.com/up9inc/mizu/shared/logger"
@@ -13,8 +12,6 @@ import (
 
 const envoyBinary = "/envoy"
 
-var numberRegex = regexp.MustCompile("[0-9]+")
-
 func discoverRelevantEnvoyPids(procfs string, pods []v1.Pod) ([]string, error) {
 	result := make([]string, 0)
 
@@ -36,7 +33,7 @@ func discoverRelevantEnvoyPids(procfs string, pods []v1.Pod) ([]string, error) {
 			continue
 		}
 
-		if checkPid(procfs, pid.Name(), pods) {
+		if checkEnvoyPid(procfs, pid.Name(), pods) {
 			result = append(result, pid.Name())
 		}
 	}
@@ -46,7 +43,7 @@ func discoverRelevantEnvoyPids(procfs string, pods []v1.Pod) ([]string, error) {
 	return result, nil
 }
 
-func checkPid(procfs string, pid string, pods []v1.Pod) bool {
+func checkEnvoyPid(procfs string, pid string, pods []v1.Pod) bool {
 	execLink := fmt.Sprintf("%v/%v/exe", procfs, pid)
 	exec, err := os.Readlink(execLink)
 
@@ -63,7 +60,7 @@ func checkPid(procfs string, pid string, pods []v1.Pod) bool {
 	}
 
 	environmentFile := fmt.Sprintf("%v/%v/environ", procfs, pid)
-	podIp, err := readEnvironmentVariable(environmentFile, "INSTANCE_IP")
+	podIp, err := getSingleValueFromEnvironmentVariableFile(environmentFile, "INSTANCE_IP")
 
 	if err != nil {
 		return false
@@ -84,30 +81,3 @@ func checkPid(procfs string, pid string, pods []v1.Pod) bool {
 
 	return false
 }
-
-func readEnvironmentVariable(file string, name string) (string, error) {
-	bytes, err := ioutil.ReadFile(file)
-
-	if err != nil {
-		logger.Log.Warningf("Error reading environment file %v - %v", file, err)
-		return "", err
-	}
-
-	envs := strings.Split(string(bytes), string([]byte{0}))
-
-	for _, env := range envs {
-		if !strings.Contains(env, "=") {
-			continue
-		}
-
-		parts := strings.Split(env, "=")
-		varName := parts[0]
-		value := parts[1]
-
-		if name == varName {
-			return value, nil
-		}
-	}
-
-	return "", nil
-}

tap/source/linkerd_discoverer.go

@@ -0,0 +1,83 @@
+package source
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/up9inc/mizu/shared/logger"
+	v1 "k8s.io/api/core/v1"
+)
+
+const linkerdBinary = "/linkerd2-proxy"
+
+func discoverRelevantLinkerdPids(procfs string, pods []v1.Pod) ([]string, error) {
+	result := make([]string, 0)
+
+	pids, err := ioutil.ReadDir(procfs)
+
+	if err != nil {
+		return result, err
+	}
+
+	logger.Log.Infof("Starting linkerd auto discoverer %v %v - scanning %v potential pids",
+		procfs, pods, len(pids))
+
+	for _, pid := range pids {
+		if !pid.IsDir() {
+			continue
+		}
+
+		if !numberRegex.MatchString(pid.Name()) {
+			continue
+		}
+
+		if checkLinkerdPid(procfs, pid.Name(), pods) {
+			result = append(result, pid.Name())
+		}
+	}
+
+	logger.Log.Infof("Found %v relevant linkerd processes - %v", len(result), result)
+
+	return result, nil
+}
+
+func checkLinkerdPid(procfs string, pid string, pods []v1.Pod) bool {
+	execLink := fmt.Sprintf("%v/%v/exe", procfs, pid)
+	exec, err := os.Readlink(execLink)
+
+	if err != nil {
+		// Debug on purpose - it may happen due to many reasons and we only care
+		//	for it during troubleshooting
+		//
+		logger.Log.Debugf("Unable to read link %v - %v\n", execLink, err)
+		return false
+	}
+
+	if !strings.HasSuffix(exec, linkerdBinary) {
+		return false
+	}
+
+	environmentFile := fmt.Sprintf("%v/%v/environ", procfs, pid)
+	podName, err := getSingleValueFromEnvironmentVariableFile(environmentFile, "_pod_name")
+
+	if err != nil {
+		return false
+	}
+
+	if podName == "" {
+		logger.Log.Debugf("Found a linkerd process without _pod_name variable %v\n", pid)
+		return false
+	}
+
+	logger.Log.Infof("Found linkerd pid %v with pod name %v", pid, podName)
+
+	for _, pod := range pods {
+		if pod.Name == podName {
+			return true
+		}
+	}
+
+	return false
+}

tap/source/packet_source_manager.go

@@ -16,7 +16,7 @@ type PacketSourceManager struct {
 }
 
 func NewPacketSourceManager(procfs string, pids string, filename string, interfaceName string,
-	istio bool, pods []v1.Pod, behaviour TcpPacketSourceBehaviour) (*PacketSourceManager, error) {
+	mtls bool, pods []v1.Pod, behaviour TcpPacketSourceBehaviour) (*PacketSourceManager, error) {
 	sources := make([]*tcpPacketSource, 0)
 	sources, err := createHostSource(sources, filename, interfaceName, behaviour)
 
@@ -25,7 +25,8 @@ func NewPacketSourceManager(procfs string, pids string, filename string, interfa
 	}
 
 	sources = createSourcesFromPids(sources, procfs, pids, interfaceName, behaviour)
-	sources = createSourcesFromEnvoy(sources, istio, procfs, pods, interfaceName, behaviour)
+	sources = createSourcesFromEnvoy(sources, mtls, procfs, pods, interfaceName, behaviour)
+	sources = createSourcesFromLinkerd(sources, mtls, procfs, pods, interfaceName, behaviour)
 
 	return &PacketSourceManager{
 		sources: sources,
@@ -54,13 +55,13 @@ func createSourcesFromPids(sources []*tcpPacketSource, procfs string, pids strin
 	return sources
 }
 
-func createSourcesFromEnvoy(sources []*tcpPacketSource, istio bool, procfs string, clusterIps []v1.Pod,
+func createSourcesFromEnvoy(sources []*tcpPacketSource, mtls bool, procfs string, pods []v1.Pod,
 	interfaceName string, behaviour TcpPacketSourceBehaviour) []*tcpPacketSource {
-	if !istio {
+	if !mtls {
 		return sources
 	}
 
-	envoyPids, err := discoverRelevantEnvoyPids(procfs, clusterIps)
+	envoyPids, err := discoverRelevantEnvoyPids(procfs, pods)
 
 	if err != nil {
 		logger.Log.Warningf("Unable to discover envoy pids - %v", err)
@@ -73,6 +74,25 @@ func createSourcesFromEnvoy(sources []*tcpPacketSource, istio bool, procfs strin
 	return sources
 }
 
+func createSourcesFromLinkerd(sources []*tcpPacketSource, mtls bool, procfs string, pods []v1.Pod,
+	interfaceName string, behaviour TcpPacketSourceBehaviour) []*tcpPacketSource {
+	if !mtls {
+		return sources
+	}
+
+	linkerdPids, err := discoverRelevantLinkerdPids(procfs, pods)
+
+	if err != nil {
+		logger.Log.Warningf("Unable to discover linkerd pids - %v", err)
+		return sources
+	}
+
+	netnsSources := newNetnsPacketSources(procfs, linkerdPids, interfaceName, behaviour)
+	sources = append(sources, netnsSources...)
+
+	return sources
+}
+
 func newHostPacketSource(filename string, interfaceName string,
 	behaviour TcpPacketSourceBehaviour) (*tcpPacketSource, error) {
 	var name string

ui/src/components/EntriesList.tsx

@@ -66,7 +66,7 @@ export const EntriesList: React.FC<EntriesListProps> = ({entries, setEntries, qu
         }
         setIsLoadingTop(true);
         const data = await api.fetchEntries(leftOffTop, -1, query, 100, 3000);
-        if (!data || !data.meta) {
+        if (!data || data.data === null || data.meta === null) {
             setNoMoreDataTop(true);
             setIsLoadingTop(false);
             return;

ui/src/components/TrafficPage.tsx

@@ -1,4 +1,4 @@
-import React, {useEffect, useRef, useState} from "react";
+import React, {useEffect, useMemo, useRef, useState} from "react";
 import {Filters} from "./Filters";
 import {EntriesList} from "./EntriesList";
 import {makeStyles} from "@material-ui/core";
@@ -12,6 +12,7 @@ import {StatusBar} from "./UI/StatusBar";
 import Api, {MizuWebsocketURL} from "../helpers/api";
 import { ToastContainer, toast } from 'react-toastify';
 import 'react-toastify/dist/ReactToastify.css';
+import debounce from 'lodash/debounce';
 
 const useLayoutStyles = makeStyles(() => ({
     details: {
@@ -72,22 +73,24 @@ export const TrafficPage: React.FC<TrafficPageProps> = ({setAnalyzeStatus, onTLS
 
     const [startTime, setStartTime] = useState(0);
 
-    useEffect(() => {
-        (async function() {
-            if (!query) {
-                setQueryBackgroundColor("#f5f5f5")
-            } else {
-                const data = await api.validateQuery(query);
-                if (!data) {
-                    return;
-                }
-                if (data.valid) {
-                    setQueryBackgroundColor("#d2fad2");
-                } else {
-                    setQueryBackgroundColor("#fad6dc");
-                }
+    const handleQueryChange = useMemo(() => debounce(async (query: string) => {
+        if (!query) {
+            setQueryBackgroundColor("#f5f5f5")
+        } else {
+            const data = await api.validateQuery(query);
+            if (!data) {
+                return;
             }
-        })();
+            if (data.valid) {
+                setQueryBackgroundColor("#d2fad2");
+            } else {
+                setQueryBackgroundColor("#fad6dc");
+            }
+        }
+    }, 500), []) as (query: string) => void;
+
+    useEffect(() => {
+        handleQueryChange(query);
     }, [query]);
 
     useEffect(() => {
@@ -320,7 +323,7 @@ export const TrafficPage: React.FC<TrafficPageProps> = ({setAnalyzeStatus, onTLS
                     {selectedEntryData && <EntryDetailed entryData={selectedEntryData} updateQuery={updateQuery}/>}
                 </div>
             </div>}
-            {tappingStatus?.pods != null && <StatusBar tappingStatus={tappingStatus}/>}
+            {tappingStatus && <StatusBar tappingStatus={tappingStatus}/>}
             <ToastContainer
                 position="bottom-right"
                 autoClose={5000}

ui/src/components/UI/StatusBar.tsx

@@ -1,9 +1,13 @@
 import './style/StatusBar.sass';
 import React, {useState} from "react";
+import warningIcon from '../assets/warning_icon.svg';
+import failIcon from '../assets/failed.svg';
+import successIcon from '../assets/success.svg';
 
 export interface TappingStatusPod {
     name: string;
     namespace: string;
+    isTapped: boolean;
 }
 
 export interface TappingStatus {
@@ -11,7 +15,7 @@ export interface TappingStatus {
 }
 
 export interface Props {
-    tappingStatus: TappingStatus
+    tappingStatus: TappingStatusPod[]
 }
 
 const pluralize = (noun: string, amount: number) => {
@@ -22,23 +26,29 @@ export const StatusBar: React.FC<Props> = ({tappingStatus}) => {
 
     const [expandedBar, setExpandedBar] = useState(false);
 
-    const uniqueNamespaces = Array.from(new Set(tappingStatus.pods.map(pod => pod.namespace)));
-    const amountOfPods = tappingStatus.pods.length;
+    const uniqueNamespaces = Array.from(new Set(tappingStatus.map(pod => pod.namespace)));
+    const amountOfPods = tappingStatus.length;
+    const amountOfTappedPods = tappingStatus.filter(pod => pod.isTapped).length;
+    const amountOfUntappedPods = amountOfPods - amountOfTappedPods;
 
     return <div className={'statusBar' + (expandedBar ? ' expandedStatusBar' : "")} onMouseOver={() => setExpandedBar(true)} onMouseLeave={() => setExpandedBar(false)}>
-        <div className="podsCount">{`Tapping ${amountOfPods} ${pluralize('pod', amountOfPods)} in ${pluralize('namespace', uniqueNamespaces.length)} ${uniqueNamespaces.join(", ")}`}</div>
+        <div className="podsCount">
+            {tappingStatus.some(pod => !pod.isTapped) && <img src={warningIcon} alt="warning"/>}
+            {`Tapping ${amountOfUntappedPods > 0 ? amountOfTappedPods + " / " + amountOfPods : amountOfPods} ${pluralize('pod', amountOfPods)} in ${pluralize('namespace', uniqueNamespaces.length)} ${uniqueNamespaces.join(", ")}`}</div>
         {expandedBar && <div style={{marginTop: 20}}>
             <table>
                 <thead>
                     <tr>
                         <th>Pod name</th>
                         <th>Namespace</th>
+                        <th style={{marginLeft: 10}}>Tapping</th>
                     </tr>
                 </thead>
                 <tbody>
-                    {tappingStatus.pods.map(pod => <tr key={pod.name}>
+                    {tappingStatus.map(pod => <tr key={pod.name}>
                         <td>{pod.name}</td>
                         <td>{pod.namespace}</td>
+                        <td style={{textAlign: "center"}}><img style={{height: 20}} alt="status" src={pod.isTapped ? successIcon : failIcon}/></td>
                     </tr>)}
                 </tbody>
             </table>

ui/src/components/UI/style/StatusBar.sass

@@ -24,8 +24,13 @@
         padding: 8px
         font-weight: 600
 
+        img
+            margin-right: 10px
+            height: 22px
+
     th
         text-align: left
+        padding-right: 15px
     td
         padding-right: 15px
         padding-top: 5px

ui/src/components/assets/failed.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48px" height="48px"><linearGradient id="wRKXFJsqHCxLE9yyOYHkza" x1="9.858" x2="38.142" y1="9.858" y2="38.142" gradientUnits="userSpaceOnUse"><stop offset="0" stop-color="#f44f5a"/><stop offset=".443" stop-color="#ee3d4a"/><stop offset="1" stop-color="#e52030"/></linearGradient><path fill="url(#wRKXFJsqHCxLE9yyOYHkza)" d="M44,24c0,11.045-8.955,20-20,20S4,35.045,4,24S12.955,4,24,4S44,12.955,44,24z"/><path d="M33.192,28.95L28.243,24l4.95-4.95c0.781-0.781,0.781-2.047,0-2.828l-1.414-1.414	c-0.781-0.781-2.047-0.781-2.828,0L24,19.757l-4.95-4.95c-0.781-0.781-2.047-0.781-2.828,0l-1.414,1.414	c-0.781,0.781-0.781,2.047,0,2.828l4.95,4.95l-4.95,4.95c-0.781,0.781-0.781,2.047,0,2.828l1.414,1.414	c0.781,0.781,2.047,0.781,2.828,0l4.95-4.95l4.95,4.95c0.781,0.781,2.047,0.781,2.828,0l1.414-1.414	C33.973,30.997,33.973,29.731,33.192,28.95z" opacity=".05"/><path d="M32.839,29.303L27.536,24l5.303-5.303c0.586-0.586,0.586-1.536,0-2.121l-1.414-1.414	c-0.586-0.586-1.536-0.586-2.121,0L24,20.464l-5.303-5.303c-0.586-0.586-1.536-0.586-2.121,0l-1.414,1.414	c-0.586,0.586-0.586,1.536,0,2.121L20.464,24l-5.303,5.303c-0.586,0.586-0.586,1.536,0,2.121l1.414,1.414	c0.586,0.586,1.536,0.586,2.121,0L24,27.536l5.303,5.303c0.586,0.586,1.536,0.586,2.121,0l1.414-1.414	C33.425,30.839,33.425,29.889,32.839,29.303z" opacity=".07"/><path fill="#fff" d="M31.071,15.515l1.414,1.414c0.391,0.391,0.391,1.024,0,1.414L18.343,32.485	c-0.391,0.391-1.024,0.391-1.414,0l-1.414-1.414c-0.391-0.391-0.391-1.024,0-1.414l14.142-14.142	C30.047,15.124,30.681,15.124,31.071,15.515z"/><path fill="#fff" d="M32.485,31.071l-1.414,1.414c-0.391,0.391-1.024,0.391-1.414,0L15.515,18.343	c-0.391-0.391-0.391-1.024,0-1.414l1.414-1.414c0.391-0.391,1.024-0.391,1.414,0l14.142,14.142	C32.876,30.047,32.876,30.681,32.485,31.071z"/></svg>

ui/src/components/assets/success.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48px" height="48px"><linearGradient id="I9GV0SozQFknxHSR6DCx5a" x1="9.858" x2="38.142" y1="9.858" y2="38.142" gradientUnits="userSpaceOnUse"><stop offset="0" stop-color="#21ad64"/><stop offset="1" stop-color="#088242"/></linearGradient><path fill="url(#I9GV0SozQFknxHSR6DCx5a)" d="M44,24c0,11.045-8.955,20-20,20S4,35.045,4,24S12.955,4,24,4S44,12.955,44,24z"/><path d="M32.172,16.172L22,26.344l-5.172-5.172c-0.781-0.781-2.047-0.781-2.828,0l-1.414,1.414	c-0.781,0.781-0.781,2.047,0,2.828l8,8c0.781,0.781,2.047,0.781,2.828,0l13-13c0.781-0.781,0.781-2.047,0-2.828L35,16.172	C34.219,15.391,32.953,15.391,32.172,16.172z" opacity=".05"/><path d="M20.939,33.061l-8-8c-0.586-0.586-0.586-1.536,0-2.121l1.414-1.414c0.586-0.586,1.536-0.586,2.121,0	L22,27.051l10.525-10.525c0.586-0.586,1.536-0.586,2.121,0l1.414,1.414c0.586,0.586,0.586,1.536,0,2.121l-13,13	C22.475,33.646,21.525,33.646,20.939,33.061z" opacity=".07"/><path fill="#fff" d="M21.293,32.707l-8-8c-0.391-0.391-0.391-1.024,0-1.414l1.414-1.414c0.391-0.391,1.024-0.391,1.414,0	L22,27.758l10.879-10.879c0.391-0.391,1.024-0.391,1.414,0l1.414,1.414c0.391,0.391,0.391,1.024,0,1.414l-13,13	C22.317,33.098,21.683,33.098,21.293,32.707z"/></svg>

ui/src/components/assets/warning_icon.svg

@@ -0,0 +1,34 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="22" height="29.999" viewBox="0 0 22 29.999">
+    <defs>
+        <filter id="Rectangle_2909" width="21" height="25.999" x=".43" y="0" filterUnits="userSpaceOnUse">
+            <feOffset dy="3"/>
+            <feGaussianBlur result="blur" stdDeviation="3"/>
+            <feFlood flood-opacity=".161"/>
+            <feComposite in2="blur" operator="in"/>
+            <feComposite in="SourceGraphic"/>
+        </filter>
+        <filter id="Rectangle_2911" width="21" height="20.999" x=".43" y="9" filterUnits="userSpaceOnUse">
+            <feOffset dy="3"/>
+            <feGaussianBlur result="blur-2" stdDeviation="3"/>
+            <feFlood flood-opacity=".161"/>
+            <feComposite in2="blur-2" operator="in"/>
+            <feComposite in="SourceGraphic"/>
+        </filter>
+        <style>
+            .cls-2{fill:#fff}
+        </style>
+    </defs>
+    <g id="warning_icon" transform="translate(-883 -4234.5)">
+        <circle id="Ellipse_1021" cx="11" cy="11" r="11" fill="#fdab2b" data-name="Ellipse 1021" transform="translate(883 4235)"/>
+        <g id="Group_5975" data-name="Group 5975" transform="translate(892.43 4240.5)">
+            <g id="Group_5974" data-name="Group 5974">
+                <g filter="url(#Rectangle_2909)" transform="translate(-9.43 -6)">
+                    <rect id="Rectangle_2909-2" width="3" height="7.999" class="cls-2" data-name="Rectangle 2909" rx="1.5" transform="translate(9.43 6)"/>
+                </g>
+                <g filter="url(#Rectangle_2911)" transform="translate(-9.43 -6)">
+                    <rect id="Rectangle_2911-2" width="3" height="2.999" class="cls-2" data-name="Rectangle 2911" rx="1.499" transform="translate(9.43 15)"/>
+                </g>
+            </g>
+        </g>
+    </g>
+</svg>