✨ Use github.com/rs/zerolog for logging (#1255)

* Use `github.com/rs/zerolog` for logging

* Use `github.com/rs/zerolog` for logging (continue)

* Add `debug` flag

* Remove `github.com/op/go-logging` dependency completely

* Fix linter

cmd/check.go

@@ -1,10 +1,9 @@
 package cmd
 
 import (
-	"log"
-
 	"github.com/creasty/defaults"
 	"github.com/kubeshark/kubeshark/config/configStructs"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
@@ -22,7 +21,7 @@ func init() {
 
 	defaultCheckConfig := configStructs.CheckConfig{}
 	if err := defaults.Set(&defaultCheckConfig); err != nil {
-		log.Print(err)
+		log.Error().Err(err)
 	}
 
 	checkCmd.Flags().Bool(configStructs.PreTapCheckName, defaultCheckConfig.PreTap, "Check pre-tap Kubeshark installation for potential problems")

cmd/check/imagePullInCluster.go

@@ -3,39 +3,55 @@ package check
 import (
 	"context"
 	"fmt"
-	"log"
 	"regexp"
 	"time"
 
 	"github.com/kubeshark/kubeshark/kubernetes"
 	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 	core "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
 func ImagePullInCluster(ctx context.Context, kubernetesProvider *kubernetes.Provider) bool {
-	log.Printf("\nimage-pull-in-cluster\n--------------------")
+	log.Info().Msg("[image-pull-in-cluster]")
 
 	namespace := "default"
 	podName := "kubeshark-test"
 
 	defer func() {
 		if err := kubernetesProvider.RemovePod(ctx, namespace, podName); err != nil {
-			log.Printf("%v error while removing test pod in cluster, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+			log.Error().
+				Str("namespace", namespace).
+				Str("pod", podName).
+				Err(err).
+				Msg("While removing test pod!")
 		}
 	}()
 
 	if err := createImagePullInClusterPod(ctx, kubernetesProvider, namespace, podName); err != nil {
-		log.Printf("%v error while creating test pod in cluster, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().
+			Str("namespace", namespace).
+			Str("pod", podName).
+			Err(err).
+			Msg("While creating test pod!")
 		return false
 	}
 
 	if err := checkImagePulled(ctx, kubernetesProvider, namespace, podName); err != nil {
 		log.Printf("%v cluster is not able to pull kubeshark containers from docker hub, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().
+			Str("namespace", namespace).
+			Str("pod", podName).
+			Err(err).
+			Msg("Unable to pull images from Docker Hub!")
 		return false
 	}
 
-	log.Printf("%v cluster is able to pull kubeshark containers from docker hub", fmt.Sprintf(utils.Green, "√"))
+	log.Info().
+		Str("namespace", namespace).
+		Str("pod", podName).
+		Msg("Pulling images from Docker Hub is passed.")
 	return true
 }
 

cmd/check/kubernetesApi.go

@@ -1,31 +1,28 @@
 package check
 
 import (
-	"fmt"
-	"log"
-
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/kubernetes"
 	"github.com/kubeshark/kubeshark/semver"
-	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 )
 
 func KubernetesApi() (*kubernetes.Provider, *semver.SemVersion, bool) {
-	log.Printf("\nkubernetes-api\n--------------------")
+	log.Info().Msg("[kubernetes-api]")
 
 	kubernetesProvider, err := kubernetes.NewProvider(config.Config.KubeConfigPath(), config.Config.KubeContext)
 	if err != nil {
-		log.Printf("%v can't initialize the client, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().Err(err).Msg("Can't initialize the client!")
 		return nil, nil, false
 	}
-	log.Printf("%v can initialize the client", fmt.Sprintf(utils.Green, "√"))
+	log.Info().Msg("Initialization of the client is passed.")
 
 	kubernetesVersion, err := kubernetesProvider.GetKubernetesVersion()
 	if err != nil {
-		log.Printf("%v can't query the Kubernetes API, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().Err(err).Msg("Can't query the Kubernetes API!")
 		return nil, nil, false
 	}
-	log.Printf("%v can query the Kubernetes API", fmt.Sprintf(utils.Green, "√"))
+	log.Info().Msg("Querying the Kubernetes API is passed.")
 
 	return kubernetesProvider, kubernetesVersion, true
 }

cmd/check/kubernetesPermissions.go

@@ -4,17 +4,16 @@ import (
 	"context"
 	"embed"
 	"fmt"
-	"log"
 
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/kubernetes"
-	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 	rbac "k8s.io/api/rbac/v1"
 	"k8s.io/client-go/kubernetes/scheme"
 )
 
 func TapKubernetesPermissions(ctx context.Context, embedFS embed.FS, kubernetesProvider *kubernetes.Provider) bool {
-	log.Printf("\nkubernetes-permissions\n--------------------")
+	log.Info().Msg("[kubernetes-permissions]")
 
 	var filePath string
 	if config.Config.IsNsRestrictedMode() {
@@ -25,14 +24,14 @@ func TapKubernetesPermissions(ctx context.Context, embedFS embed.FS, kubernetesP
 
 	data, err := embedFS.ReadFile(filePath)
 	if err != nil {
-		log.Printf("%v error while checking kubernetes permissions, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().Err(err).Msg("While checking Kubernetes permissions!")
 		return false
 	}
 
 	decode := scheme.Codecs.UniversalDeserializer().Decode
 	obj, _, err := decode(data, nil, nil)
 	if err != nil {
-		log.Printf("%v error while checking kubernetes permissions, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().Err(err).Msg("While checking Kubernetes permissions!")
 		return false
 	}
 
@@ -43,7 +42,7 @@ func TapKubernetesPermissions(ctx context.Context, embedFS embed.FS, kubernetesP
 		return checkRulesPermissions(ctx, kubernetesProvider, resource.Rules, "")
 	}
 
-	log.Printf("%v error while checking kubernetes permissions, err: resource of type 'Role' or 'ClusterRole' not found in permission files", fmt.Sprintf(utils.Red, "✗"))
+	log.Error().Msg("While checking Kubernetes permissions! Resource of types 'Role' or 'ClusterRole' are not found in permission files.")
 	return false
 }
 
@@ -75,13 +74,18 @@ func checkPermissionExist(group string, resource string, verb string, namespace
 	}
 
 	if err != nil {
-		log.Printf("%v error checking permission for %v %v %v, err: %v", fmt.Sprintf(utils.Red, "✗"), verb, resource, groupAndNamespace, err)
+		log.Error().
+			Str("verb", verb).
+			Str("resource", resource).
+			Str("group-and-namespace", groupAndNamespace).
+			Err(err).
+			Msg("While checking Kubernetes permissions!")
 		return false
 	} else if !exist {
-		log.Printf("%v can't %v %v %v", fmt.Sprintf(utils.Red, "✗"), verb, resource, groupAndNamespace)
+		log.Error().Msg(fmt.Sprintf("Can't %v %v %v", verb, resource, groupAndNamespace))
 		return false
 	}
 
-	log.Printf("%v can %v %v %v", fmt.Sprintf(utils.Green, "√"), verb, resource, groupAndNamespace)
+	log.Info().Msg(fmt.Sprintf("Can %v %v %v", verb, resource, groupAndNamespace))
 	return true
 }

cmd/check/kubernetesResources.go

@@ -3,15 +3,14 @@ package check
 import (
 	"context"
 	"fmt"
-	"log"
 
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/kubernetes"
-	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 )
 
 func KubernetesResources(ctx context.Context, kubernetesProvider *kubernetes.Provider) bool {
-	log.Printf("\nk8s-components\n--------------------")
+	log.Info().Msg("[k8s-components]")
 
 	exist, err := kubernetesProvider.DoesNamespaceExist(ctx, config.Config.ResourcesNamespace)
 	allResourcesExist := checkResourceExist(config.Config.ResourcesNamespace, "namespace", exist, err)
@@ -46,20 +45,32 @@ func KubernetesResources(ctx context.Context, kubernetesProvider *kubernetes.Pro
 
 func checkPodResourcesExist(ctx context.Context, kubernetesProvider *kubernetes.Provider) bool {
 	if pods, err := kubernetesProvider.ListPodsByAppLabel(ctx, config.Config.ResourcesNamespace, kubernetes.HubPodName); err != nil {
-		log.Printf("%v error checking if '%v' pod is running, err: %v", fmt.Sprintf(utils.Red, "✗"), kubernetes.HubPodName, err)
+		log.Error().
+			Str("name", kubernetes.HubPodName).
+			Err(err).
+			Msg("While checking if pod is running!")
 		return false
 	} else if len(pods) == 0 {
-		log.Printf("%v '%v' pod doesn't exist", fmt.Sprintf(utils.Red, "✗"), kubernetes.HubPodName)
+		log.Error().
+			Str("name", kubernetes.HubPodName).
+			Msg("Pod doesn't exist!")
 		return false
 	} else if !kubernetes.IsPodRunning(&pods[0]) {
-		log.Printf("%v '%v' pod not running", fmt.Sprintf(utils.Red, "✗"), kubernetes.HubPodName)
+		log.Error().
+			Str("name", kubernetes.HubPodName).
+			Msg("Pod is not running!")
 		return false
 	}
 
-	log.Printf("%v '%v' pod running", fmt.Sprintf(utils.Green, "√"), kubernetes.HubPodName)
+	log.Info().
+		Str("name", kubernetes.HubPodName).
+		Msg("Pod is running.")
 
 	if pods, err := kubernetesProvider.ListPodsByAppLabel(ctx, config.Config.ResourcesNamespace, kubernetes.TapperPodName); err != nil {
-		log.Printf("%v error checking if '%v' pods are running, err: %v", fmt.Sprintf(utils.Red, "✗"), kubernetes.TapperPodName, err)
+		log.Error().
+			Str("name", kubernetes.TapperPodName).
+			Err(err).
+			Msg("While checking if pods are running!")
 		return false
 	} else {
 		tappers := 0
@@ -73,24 +84,38 @@ func checkPodResourcesExist(ctx context.Context, kubernetesProvider *kubernetes.
 		}
 
 		if notRunningTappers > 0 {
-			log.Printf("%v '%v' %v/%v pods are not running", fmt.Sprintf(utils.Red, "✗"), kubernetes.TapperPodName, notRunningTappers, tappers)
+			log.Error().
+				Str("name", kubernetes.TapperPodName).
+				Msg(fmt.Sprintf("%d/%d pods are not running!", notRunningTappers, tappers))
 			return false
 		}
 
-		log.Printf("%v '%v' %v pods running", fmt.Sprintf(utils.Green, "√"), kubernetes.TapperPodName, tappers)
+		log.Info().
+			Str("name", kubernetes.TapperPodName).
+			Msg(fmt.Sprintf("All %d pods are running.", tappers))
 		return true
 	}
 }
 
 func checkResourceExist(resourceName string, resourceType string, exist bool, err error) bool {
 	if err != nil {
-		log.Printf("%v error checking if '%v' %v exists, err: %v", fmt.Sprintf(utils.Red, "✗"), resourceName, resourceType, err)
+		log.Error().
+			Str("name", resourceName).
+			Str("type", resourceType).
+			Err(err).
+			Msg("Checking if resource exists!")
 		return false
 	} else if !exist {
-		log.Printf("%v '%v' %v doesn't exist", fmt.Sprintf(utils.Red, "✗"), resourceName, resourceType)
+		log.Error().
+			Str("name", resourceName).
+			Str("type", resourceType).
+			Msg("Resource doesn't exist!")
 		return false
 	}
 
-	log.Printf("%v '%v' %v exists", fmt.Sprintf(utils.Green, "√"), resourceName, resourceType)
+	log.Info().
+		Str("name", resourceName).
+		Str("type", resourceType).
+		Msg("Resource exist.")
 	return true
 }

cmd/check/kubernetesVersion.go

@@ -1,22 +1,19 @@
 package check
 
 import (
-	"fmt"
-	"log"
-
 	"github.com/kubeshark/kubeshark/kubernetes"
 	"github.com/kubeshark/kubeshark/semver"
-	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 )
 
 func KubernetesVersion(kubernetesVersion *semver.SemVersion) bool {
-	log.Printf("\nkubernetes-version\n--------------------")
+	log.Info().Msg("[kubernetes-api]")
 
 	if err := kubernetes.ValidateKubernetesVersion(kubernetesVersion); err != nil {
-		log.Printf("%v not running the minimum Kubernetes API version, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().Err(err).Msg("Not running the minimum Kubernetes API version!")
 		return false
 	}
 
-	log.Printf("%v is running the minimum Kubernetes API version", fmt.Sprintf(utils.Green, "√"))
+	log.Info().Msg("Running the minimum Kubernetes API version")
 	return true
 }

cmd/check/serverConnection.go

@@ -2,41 +2,39 @@ package check
 
 import (
 	"context"
-	"fmt"
-	"log"
 	"regexp"
 
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/internal/connect"
 	"github.com/kubeshark/kubeshark/kubernetes"
-	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 )
 
 func ServerConnection(kubernetesProvider *kubernetes.Provider) bool {
-	log.Printf("\nHub connectivity\n--------------------")
+	log.Info().Msg("[hub-connectivity]")
 
 	serverUrl := kubernetes.GetLocalhostOnPort(config.Config.Hub.PortForward.SrcPort)
 
 	connector := connect.NewConnector(serverUrl, 1, connect.DefaultTimeout)
 	if err := connector.TestConnection(""); err == nil {
-		log.Printf("%v found Kubeshark server tunnel available and connected successfully to Hub", fmt.Sprintf(utils.Green, "√"))
+		log.Info().Msg("Found Kubeshark server tunnel available and connected successfully to Hub!")
 		return true
 	}
 
 	connectedToHub := false
 
 	if err := checkProxy(serverUrl, kubernetesProvider); err != nil {
-		log.Printf("%v couldn't connect to Hub using proxy, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().Err(err).Msg("Couldn't connect to Hub using proxy!")
 	} else {
 		connectedToHub = true
-		log.Printf("%v connected successfully to Hub using proxy", fmt.Sprintf(utils.Green, "√"))
+		log.Info().Msg("Connected successfully to Hub using proxy.")
 	}
 
 	if err := checkPortForward(serverUrl, kubernetesProvider); err != nil {
-		log.Printf("%v couldn't connect to Hub using port-forward, err: %v", fmt.Sprintf(utils.Red, "✗"), err)
+		log.Error().Err(err).Msg("Couldn't connect to Hub using port-forward!")
 	} else {
 		connectedToHub = true
-		log.Printf("%v connected successfully to Hub using port-forward", fmt.Sprintf(utils.Green, "√"))
+		log.Info().Msg("Connected successfully to Hub using port-forward.")
 	}
 
 	return connectedToHub
@@ -57,7 +55,7 @@ func checkProxy(serverUrl string, kubernetesProvider *kubernetes.Provider) error
 	}
 
 	if err := httpServer.Shutdown(ctx); err != nil {
-		log.Printf("Error occurred while stopping proxy, err: %v", err)
+		log.Error().Err(err).Msg("While stopping the proxy!")
 	}
 
 	return nil

cmd/checkRunner.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"embed"
 	"fmt"
-	"log"
 
 	"github.com/kubeshark/kubeshark/cmd/check"
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 )
 
 var (
@@ -17,7 +17,7 @@ var (
 )
 
 func runKubesharkCheck() {
-	log.Printf("Kubeshark checks\n===================")
+	log.Info().Msg("Kubeshark checks...")
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel() // cancel will be called when this function exits
@@ -51,8 +51,8 @@ func runKubesharkCheck() {
 	}
 
 	if checkPassed {
-		log.Printf("\nStatus check results are %v", fmt.Sprintf(utils.Green, "√"))
+		log.Info().Msg(fmt.Sprintf("Status check results are %v", fmt.Sprintf(utils.Green, "√")))
 	} else {
-		log.Printf("\nStatus check results are %v", fmt.Sprintf(utils.Red, "✗"))
+		log.Info().Msg(fmt.Sprintf("Status check results are %v", fmt.Sprintf(utils.Red, "✗")))
 	}
 }

cmd/common.go

@@ -5,51 +5,57 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"log"
 	"path"
 	"regexp"
 	"time"
 
+	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/config/configStructs"
 	"github.com/kubeshark/kubeshark/errormessage"
 	"github.com/kubeshark/kubeshark/internal/connect"
+	"github.com/kubeshark/kubeshark/kubernetes"
 	"github.com/kubeshark/kubeshark/kubeshark"
 	"github.com/kubeshark/kubeshark/kubeshark/fsUtils"
 	"github.com/kubeshark/kubeshark/resources"
-	"github.com/kubeshark/kubeshark/utils"
 	"github.com/kubeshark/worker/models"
-
-	"github.com/kubeshark/kubeshark/config"
-	"github.com/kubeshark/kubeshark/kubernetes"
+	"github.com/rs/zerolog/log"
 )
 
 func startProxyReportErrorIfAny(kubernetesProvider *kubernetes.Provider, ctx context.Context, cancel context.CancelFunc, serviceName string, srcPort uint16, dstPort uint16, healthCheck string) {
 	httpServer, err := kubernetes.StartProxy(kubernetesProvider, config.Config.Tap.ProxyHost, srcPort, dstPort, config.Config.ResourcesNamespace, serviceName, cancel)
 	if err != nil {
-		log.Printf(utils.Error, fmt.Sprintf("Error occured while running k8s proxy %v\n"+
-			"Try setting different port by using --%s", errormessage.FormatError(err), configStructs.GuiPortTapName))
+		log.Error().
+			Err(errormessage.FormatError(err)).
+			Msg(fmt.Sprintf("Error occured while running k8s proxy. Try setting different port by using --%s", configStructs.GuiPortTapName))
 		cancel()
 		return
 	}
 
 	connector := connect.NewConnector(kubernetes.GetLocalhostOnPort(srcPort), connect.DefaultRetries, connect.DefaultTimeout)
 	if err := connector.TestConnection(healthCheck); err != nil {
-		log.Printf("Couldn't connect using proxy, stopping proxy and trying to create port-forward")
+		log.Error().Msg("Couldn't connect using proxy, stopping proxy and trying to create port-forward..")
 		if err := httpServer.Shutdown(ctx); err != nil {
-			log.Printf("Error occurred while stopping proxy %v", errormessage.FormatError(err))
+			log.Error().
+				Err(errormessage.FormatError(err)).
+				Msg("Error occurred while stopping proxy.")
 		}
 
 		podRegex, _ := regexp.Compile(kubernetes.HubPodName)
 		if _, err := kubernetes.NewPortForward(kubernetesProvider, config.Config.ResourcesNamespace, podRegex, srcPort, dstPort, ctx, cancel); err != nil {
-			log.Printf(utils.Error, fmt.Sprintf("Error occured while running port forward [%s] %v\n"+
-				"Try setting different port by using --%s", podRegex, errormessage.FormatError(err), configStructs.GuiPortTapName))
+			log.Error().
+				Str("pod-regex", podRegex.String()).
+				Err(errormessage.FormatError(err)).
+				Msg(fmt.Sprintf("Error occured while running port forward. Try setting different port by using --%s", configStructs.GuiPortTapName))
 			cancel()
 			return
 		}
 
 		connector = connect.NewConnector(kubernetes.GetLocalhostOnPort(srcPort), connect.DefaultRetries, connect.DefaultTimeout)
 		if err := connector.TestConnection(healthCheck); err != nil {
-			log.Printf(utils.Error, fmt.Sprintf("Couldn't connect to [%s].", serviceName))
+			log.Error().
+				Str("service-name", serviceName).
+				Err(errormessage.FormatError(err)).
+				Msg("Couldn't connect to service.")
 			cancel()
 			return
 		}
@@ -85,9 +91,9 @@ func getKubernetesProviderForCli() (*kubernetes.Provider, error) {
 func handleKubernetesProviderError(err error) {
 	var clusterBehindProxyErr *kubernetes.ClusterBehindProxyError
 	if ok := errors.As(err, &clusterBehindProxyErr); ok {
-		log.Printf("cannot establish http-proxy connection to the Kubernetes cluster. If you’re using Lens or similar tool, please run kubeshark with regular kubectl config using --%v %v=$HOME/.kube/config flag", config.SetCommandName, config.KubeConfigPathConfigName)
+		log.Error().Msg(fmt.Sprintf("Cannot establish http-proxy connection to the Kubernetes cluster. If you’re using Lens or similar tool, please run kubeshark with regular kubectl config using --%v %v=$HOME/.kube/config flag", config.SetCommandName, config.KubeConfigPathConfigName))
 	} else {
-		log.Print(err)
+		log.Error().Err(err)
 	}
 }
 
@@ -105,7 +111,7 @@ func dumpLogsIfNeeded(ctx context.Context, kubernetesProvider *kubernetes.Provid
 	kubesharkDir := kubeshark.GetKubesharkFolderPath()
 	filePath := path.Join(kubesharkDir, fmt.Sprintf("kubeshark_logs_%s.zip", time.Now().Format("2006_01_02__15_04_05")))
 	if err := fsUtils.DumpLogs(ctx, kubernetesProvider, filePath); err != nil {
-		log.Printf("Failed dump logs %v", err)
+		log.Error().Err(err).Msg("Failed to dump logs.")
 	}
 }
 

cmd/config.go

@@ -2,12 +2,12 @@ package cmd
 
 import (
 	"fmt"
-	"log"
 
 	"github.com/creasty/defaults"
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/config/configStructs"
 	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
@@ -17,25 +17,25 @@ var configCmd = &cobra.Command{
 	RunE: func(cmd *cobra.Command, args []string) error {
 		configWithDefaults, err := config.GetConfigWithDefaults()
 		if err != nil {
-			log.Printf("Failed generating config with defaults, err: %v", err)
+			log.Error().Err(err).Msg("Failed generating config with defaults.")
 			return nil
 		}
 
 		if config.Config.Config.Regenerate {
 			if err := config.WriteConfig(configWithDefaults); err != nil {
-				log.Printf("Failed writing config with defaults, err: %v", err)
+				log.Error().Err(err).Msg("Failed generating config with defaults.")
 				return nil
 			}
 
-			log.Printf("Template File written to %s", fmt.Sprintf(utils.Purple, config.Config.ConfigFilePath))
+			log.Info().Str("config-path", config.Config.ConfigFilePath).Msg("Template file written to config path.")
 		} else {
 			template, err := utils.PrettyYaml(configWithDefaults)
 			if err != nil {
-				log.Printf("Failed converting config with defaults to yaml, err: %v", err)
+				log.Error().Err(err).Msg("Failed converting config with defaults to YAML.")
 				return nil
 			}
 
-			log.Printf("Writing template config.\n%v", template)
+			log.Debug().Str("template", template).Msg("Writing template config...")
 			fmt.Printf("%v", template)
 		}
 
@@ -48,7 +48,7 @@ func init() {
 
 	defaultConfig := config.CreateDefaultConfig()
 	if err := defaults.Set(&defaultConfig); err != nil {
-		log.Print(err)
+		log.Debug().Err(err)
 	}
 
 	configCmd.Flags().BoolP(configStructs.RegenerateConfigName, "r", defaultConfig.Config.Regenerate, fmt.Sprintf("Regenerate the config file with default values to path %s or to chosen path using --%s", defaultConfig.ConfigFilePath, config.ConfigFilePathCommandName))

cmd/goUtils/funcWrappers.go

@@ -1,21 +1,25 @@
 package goUtils
 
 import (
-	"log"
 	"reflect"
 	"runtime/debug"
+
+	"github.com/rs/zerolog/log"
 )
 
 func HandleExcWrapper(fn interface{}, params ...interface{}) (result []reflect.Value) {
 	defer func() {
 		if panicMessage := recover(); panicMessage != nil {
 			stack := debug.Stack()
-			log.Fatalf("Unhandled panic: %v\n stack: %s", panicMessage, stack)
+			log.Fatal().
+				Interface("msg", panicMessage).
+				Interface("stack", stack).
+				Msg("Unhandled panic!")
 		}
 	}()
 	f := reflect.ValueOf(fn)
 	if f.Type().NumIn() != len(params) {
-		panic("incorrect number of parameters!")
+		panic("Incorrect number of parameters!")
 	}
 	inputs := make([]reflect.Value, len(params))
 	for k, in := range params {

cmd/logs.go

@@ -2,13 +2,13 @@ package cmd
 
 import (
 	"context"
-	"log"
 
 	"github.com/creasty/defaults"
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/config/configStructs"
 	"github.com/kubeshark/kubeshark/errormessage"
 	"github.com/kubeshark/kubeshark/kubeshark/fsUtils"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
@@ -26,10 +26,10 @@ var logsCmd = &cobra.Command{
 			return errormessage.FormatError(validationErr)
 		}
 
-		log.Printf("Using file path %s", config.Config.Logs.FilePath())
+		log.Debug().Str("logs-path", config.Config.Logs.FilePath()).Msg("Using this logs path...")
 
 		if dumpLogsErr := fsUtils.DumpLogs(ctx, kubernetesProvider, config.Config.Logs.FilePath()); dumpLogsErr != nil {
-			log.Printf("Failed dump logs %v", dumpLogsErr)
+			log.Error().Err(dumpLogsErr).Msg("Failed to dump logs.")
 		}
 
 		return nil
@@ -41,7 +41,7 @@ func init() {
 
 	defaultLogsConfig := configStructs.LogsConfig{}
 	if err := defaults.Set(&defaultLogsConfig); err != nil {
-		log.Print(err)
+		log.Debug().Err(err)
 	}
 
 	logsCmd.Flags().StringP(configStructs.FileLogsName, "f", defaultLogsConfig.FileStr, "Path for zip file (default current <pwd>\\kubeshark_logs.zip)")

cmd/root.go

@@ -2,13 +2,11 @@ package cmd
 
 import (
 	"fmt"
-	"log"
-	"time"
 
 	"github.com/creasty/defaults"
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/kubeshark/version"
-	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
@@ -19,7 +17,7 @@ var rootCmd = &cobra.Command{
 Further info is available at https://github.com/kubeshark/kubeshark`,
 	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
 		if err := config.InitConfig(cmd); err != nil {
-			log.Fatal(err)
+			log.Fatal().Err(err)
 		}
 
 		return nil
@@ -29,29 +27,18 @@ Further info is available at https://github.com/kubeshark/kubeshark`,
 func init() {
 	defaultConfig := config.CreateDefaultConfig()
 	if err := defaults.Set(&defaultConfig); err != nil {
-		log.Print(err)
+		log.Debug().Err(err)
 	}
 
 	rootCmd.PersistentFlags().StringSlice(config.SetCommandName, []string{}, fmt.Sprintf("Override values using --%s", config.SetCommandName))
 	rootCmd.PersistentFlags().String(config.ConfigFilePathCommandName, defaultConfig.ConfigFilePath, fmt.Sprintf("Override config file path using --%s", config.ConfigFilePathCommandName))
-}
-
-func printNewVersionIfNeeded(versionChan chan string) {
-	select {
-	case versionMsg := <-versionChan:
-		if versionMsg != "" {
-			log.Printf(utils.Yellow, versionMsg)
-		}
-	case <-time.After(2 * time.Second):
-	}
+	rootCmd.PersistentFlags().Bool("debug", false, "Enable debug mode.")
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the tapCmd.
 func Execute() {
-	versionChan := make(chan string)
-	defer printNewVersionIfNeeded(versionChan)
-	go version.CheckNewerVersion(versionChan)
+	go version.CheckNewerVersion()
 
 	cobra.CheckErr(rootCmd.Execute())
 }

cmd/tap.go

@@ -2,12 +2,12 @@ package cmd
 
 import (
 	"errors"
-	"log"
 
 	"github.com/creasty/defaults"
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/config/configStructs"
 	"github.com/kubeshark/kubeshark/errormessage"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
@@ -31,7 +31,9 @@ Supported protocols are HTTP and gRPC.`,
 			return errormessage.FormatError(err)
 		}
 
-		log.Printf("Kubeshark will store up to %s of traffic, old traffic will be cleared once the limit is reached.", config.Config.Tap.HumanMaxEntriesDBSize)
+		log.Info().
+			Str("limit", config.Config.Tap.HumanMaxEntriesDBSize).
+			Msg("Kubeshark will store traffic up to a limit. The old traffic will be cleared once the limit is reached.")
 
 		return nil
 	},
@@ -42,7 +44,7 @@ func init() {
 
 	defaultTapConfig := configStructs.TapConfig{}
 	if err := defaults.Set(&defaultTapConfig); err != nil {
-		log.Print(err)
+		log.Debug().Err(err)
 	}
 
 	tapCmd.Flags().Uint16P(configStructs.GuiPortTapName, "p", defaultTapConfig.GuiPort, "Provide a custom port for the web interface webserver")

cmd/tapRunner.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"log"
 	"regexp"
 	"strings"
 	"time"
@@ -24,6 +23,7 @@ import (
 	"github.com/kubeshark/kubeshark/kubernetes"
 	"github.com/kubeshark/worker/api"
 	"github.com/kubeshark/worker/models"
+	"github.com/rs/zerolog/log"
 )
 
 const cleanupTimeout = time.Minute
@@ -58,14 +58,13 @@ func RunKubesharkTap() {
 	conf := getTapConfig()
 	serializedKubesharkConfig, err := getSerializedTapConfig(conf)
 	if err != nil {
-		log.Printf(utils.Error, fmt.Sprintf("Error serializing kubeshark config: %v", errormessage.FormatError(err)))
+		log.Error().Err(errormessage.FormatError(err)).Msg("Error serializing Kubeshark config!")
 		return
 	}
 
 	if config.Config.IsNsRestrictedMode() {
 		if len(state.targetNamespaces) != 1 || !utils.Contains(state.targetNamespaces, config.Config.ResourcesNamespace) {
-			log.Printf("Not supported mode. Kubeshark can't resolve IPs in other namespaces when running in namespace restricted mode.\n"+
-				"You can use the same namespace for --%s and --%s", configStructs.NamespacesTapName, config.ResourcesNamespaceConfigName)
+			log.Error().Msg(fmt.Sprintf("Kubeshark can't resolve IPs in other namespaces when running in namespace restricted mode. You can use the same namespace for --%s and --%s", configStructs.NamespacesTapName, config.ResourcesNamespaceConfigName))
 			return
 		}
 	}
@@ -77,24 +76,24 @@ func RunKubesharkTap() {
 		namespacesStr = "all namespaces"
 	}
 
-	log.Printf("Tapping pods in %s", namespacesStr)
+	log.Info().Str("namespace", namespacesStr).Msg("Tapping pods in:")
 
 	if err := printTappedPodsPreview(ctx, kubernetesProvider, state.targetNamespaces); err != nil {
-		log.Printf(utils.Error, fmt.Sprintf("Error listing pods: %v", errormessage.FormatError(err)))
+		log.Error().Err(errormessage.FormatError(err)).Msg("Error listing pods!")
 	}
 
 	if config.Config.Tap.DryRun {
 		return
 	}
 
-	log.Printf("Waiting for Kubeshark deployment to finish...")
+	log.Info().Msg("Waiting for Kubeshark deployment to finish...")
 	if state.kubesharkServiceAccountExists, err = resources.CreateTapKubesharkResources(ctx, kubernetesProvider, serializedKubesharkConfig, config.Config.IsNsRestrictedMode(), config.Config.ResourcesNamespace, config.Config.Tap.MaxEntriesDBSizeBytes(), config.Config.Tap.HubResources, config.Config.ImagePullPolicy(), config.Config.LogLevel(), config.Config.Tap.Profiler); err != nil {
 		var statusError *k8serrors.StatusError
 		if errors.As(err, &statusError) && (statusError.ErrStatus.Reason == metav1.StatusReasonAlreadyExists) {
-			log.Print("Kubeshark is already running in this namespace, change the `kubeshark-resources-namespace` configuration or run `kubeshark clean` to remove the currently running Kubeshark instance")
+			log.Info().Msg("Kubeshark is already running in this namespace, change the `kubeshark-resources-namespace` configuration or run `kubeshark clean` to remove the currently running Kubeshark instance")
 		} else {
 			defer resources.CleanUpKubesharkResources(ctx, cancel, kubernetesProvider, config.Config.IsNsRestrictedMode(), config.Config.ResourcesNamespace)
-			log.Printf(utils.Error, fmt.Sprintf("Error creating resources: %v", errormessage.FormatError(err)))
+			log.Error().Err(errormessage.FormatError(err)).Msg("Error creating resources!")
 		}
 
 		return
@@ -119,7 +118,6 @@ func getTapConfig() *models.Config {
 		MaxDBSizeBytes:              config.Config.Tap.MaxEntriesDBSizeBytes(),
 		InsertionFilter:             config.Config.Tap.GetInsertionFilter(),
 		PullPolicy:                  config.Config.ImagePullPolicyStr,
-		LogLevel:                    config.Config.LogLevel(),
 		TapperResources:             config.Config.Tap.TapperResources,
 		KubesharkResourcesNamespace: config.Config.ResourcesNamespace,
 		AgentDatabasePath:           models.DataDirPath,
@@ -143,7 +141,7 @@ func printTappedPodsPreview(ctx context.Context, kubernetesProvider *kubernetes.
 			printNoPodsFoundSuggestion(namespaces)
 		}
 		for _, tappedPod := range matchingPods {
-			log.Printf(utils.Green, fmt.Sprintf("+%s", tappedPod.Name))
+			log.Info().Msg(fmt.Sprintf(utils.Green, fmt.Sprintf("+%s", tappedPod.Name)))
 		}
 		return nil
 	}
@@ -175,29 +173,29 @@ func startTapperSyncer(ctx context.Context, cancel context.CancelFunc, provider
 			select {
 			case syncerErr, ok := <-tapperSyncer.ErrorOut:
 				if !ok {
-					log.Print("kubesharkTapperSyncer err channel closed, ending listener loop")
+					log.Debug().Msg("kubesharkTapperSyncer err channel closed, ending listener loop")
 					return
 				}
-				log.Printf(utils.Error, getErrorDisplayTextForK8sTapManagerError(syncerErr))
+				log.Error().Msg(getErrorDisplayTextForK8sTapManagerError(syncerErr))
 				cancel()
 			case _, ok := <-tapperSyncer.TapPodChangesOut:
 				if !ok {
-					log.Print("kubesharkTapperSyncer pod changes channel closed, ending listener loop")
+					log.Debug().Msg("kubesharkTapperSyncer pod changes channel closed, ending listener loop")
 					return
 				}
 				if err := connector.ReportTappedPods(tapperSyncer.CurrentlyTappedPods); err != nil {
-					log.Printf("[Error] failed update tapped pods %v", err)
+					log.Error().Err(err).Msg("failed update tapped pods.")
 				}
 			case tapperStatus, ok := <-tapperSyncer.TapperStatusChangedOut:
 				if !ok {
-					log.Print("kubesharkTapperSyncer tapper status changed channel closed, ending listener loop")
+					log.Debug().Msg("kubesharkTapperSyncer tapper status changed channel closed, ending listener loop")
 					return
 				}
 				if err := connector.ReportTapperStatus(tapperStatus); err != nil {
-					log.Printf("[Error] failed update tapper status %v", err)
+					log.Error().Err(err).Msg("failed update tapper status.")
 				}
 			case <-ctx.Done():
-				log.Print("kubesharkTapperSyncer event listener loop exiting due to context done")
+				log.Debug().Msg("kubesharkTapperSyncer event listener loop exiting due to context done")
 				return
 			}
 		}
@@ -211,7 +209,7 @@ func printNoPodsFoundSuggestion(targetNamespaces []string) {
 	if !utils.Contains(targetNamespaces, kubernetes.K8sAllNamespaces) {
 		suggestionStr = ". You can also try selecting a different namespace with -n or tap all namespaces with -A"
 	}
-	log.Printf(utils.Warning, fmt.Sprintf("Did not find any currently running pods that match the regex argument, kubeshark will automatically tap matching pods if any are created later%s", suggestionStr))
+	log.Warn().Msg(fmt.Sprintf("Did not find any currently running pods that match the regex argument, kubeshark will automatically tap matching pods if any are created later%s", suggestionStr))
 }
 
 func getErrorDisplayTextForK8sTapManagerError(err kubernetes.K8sTapManagerError) string {
@@ -245,20 +243,24 @@ func watchHubPod(ctx context.Context, kubernetesProvider *kubernetes.Provider, c
 
 			switch wEvent.Type {
 			case kubernetes.EventAdded:
-				log.Printf("Watching Hub pod loop, added")
+				log.Info().Str("pod", kubernetes.HubPodName).Msg("Added pod.")
 			case kubernetes.EventDeleted:
-				log.Printf("%s removed", kubernetes.HubPodName)
+				log.Info().Str("pod", kubernetes.HubPodName).Msg("Removed pod.")
 				cancel()
 				return
 			case kubernetes.EventModified:
 				modifiedPod, err := wEvent.ToPod()
 				if err != nil {
-					log.Printf(utils.Error, err)
+					log.Error().Str("pod", kubernetes.HubPodName).Err(err).Msg("While watching pod.")
 					cancel()
 					continue
 				}
 
-				log.Printf("Watching Hub pod loop, modified: %v, containers statuses: %v", modifiedPod.Status.Phase, modifiedPod.Status.ContainerStatuses)
+				log.Debug().
+					Str("pod", kubernetes.HubPodName).
+					Interface("phase", modifiedPod.Status.Phase).
+					Interface("containers-statuses", modifiedPod.Status.ContainerStatuses).
+					Msg("Watching pod.")
 
 				if modifiedPod.Status.Phase == core.PodRunning && !isPodReady {
 					isPodReady = true
@@ -281,16 +283,24 @@ func watchHubPod(ctx context.Context, kubernetesProvider *kubernetes.Provider, c
 				continue
 			}
 
-			log.Printf("[ERROR] Hub pod creation, watching %v namespace, error: %v", config.Config.ResourcesNamespace, err)
+			log.Error().
+				Str("pod", kubernetes.HubPodName).
+				Str("namespace", config.Config.ResourcesNamespace).
+				Err(err).
+				Msg("Failed creating pod.")
 			cancel()
 
 		case <-timeAfter:
 			if !isPodReady {
-				log.Printf(utils.Error, "Kubeshark Hub was not ready in time")
+				log.Error().
+					Str("pod", kubernetes.HubPodName).
+					Msg("Pod was not ready in time.")
 				cancel()
 			}
 		case <-ctx.Done():
-			log.Printf("Watching Hub pod loop, ctx done")
+			log.Debug().
+				Str("pod", kubernetes.HubPodName).
+				Msg("Watching pod, context done.")
 			return
 		}
 	}
@@ -314,20 +324,24 @@ func watchFrontPod(ctx context.Context, kubernetesProvider *kubernetes.Provider,
 
 			switch wEvent.Type {
 			case kubernetes.EventAdded:
-				log.Printf("Watching Hub pod loop, added")
+				log.Info().Str("pod", kubernetes.FrontPodName).Msg("Added pod.")
 			case kubernetes.EventDeleted:
-				log.Printf("%s removed", kubernetes.FrontPodName)
+				log.Info().Str("pod", kubernetes.FrontPodName).Msg("Removed pod.")
 				cancel()
 				return
 			case kubernetes.EventModified:
 				modifiedPod, err := wEvent.ToPod()
 				if err != nil {
-					log.Printf(utils.Error, err)
+					log.Error().Str("pod", kubernetes.FrontPodName).Err(err).Msg("While watching pod.")
 					cancel()
 					continue
 				}
 
-				log.Printf("Watching Hub pod loop, modified: %v, containers statuses: %v", modifiedPod.Status.Phase, modifiedPod.Status.ContainerStatuses)
+				log.Debug().
+					Str("pod", kubernetes.FrontPodName).
+					Interface("phase", modifiedPod.Status.Phase).
+					Interface("containers-statuses", modifiedPod.Status.ContainerStatuses).
+					Msg("Watching pod.")
 
 				if modifiedPod.Status.Phase == core.PodRunning && !isPodReady {
 					isPodReady = true
@@ -349,16 +363,24 @@ func watchFrontPod(ctx context.Context, kubernetesProvider *kubernetes.Provider,
 				continue
 			}
 
-			log.Printf("[ERROR] Front pod creation, watching %v namespace, error: %v", config.Config.ResourcesNamespace, err)
+			log.Error().
+				Str("pod", kubernetes.FrontPodName).
+				Str("namespace", config.Config.ResourcesNamespace).
+				Err(err).
+				Msg("Failed creating pod.")
 			cancel()
 
 		case <-timeAfter:
 			if !isPodReady {
-				log.Printf(utils.Error, "Kubeshark Hub was not ready in time")
+				log.Error().
+					Str("pod", kubernetes.FrontPodName).
+					Msg("Pod was not ready in time.")
 				cancel()
 			}
 		case <-ctx.Done():
-			log.Printf("Watching Front pod loop, ctx done")
+			log.Debug().
+				Str("pod", kubernetes.FrontPodName).
+				Msg("Watching pod, context done.")
 			return
 		}
 	}
@@ -378,7 +400,10 @@ func watchHubEvents(ctx context.Context, kubernetesProvider *kubernetes.Provider
 
 			event, err := wEvent.ToEvent()
 			if err != nil {
-				log.Printf("[ERROR] parsing Kubeshark resource event: %+v", err)
+				log.Error().
+					Str("pod", kubernetes.HubPodName).
+					Err(err).
+					Msg("Parsing resource event.")
 				continue
 			}
 
@@ -386,19 +411,27 @@ func watchHubEvents(ctx context.Context, kubernetesProvider *kubernetes.Provider
 				continue
 			}
 
-			log.Printf(
-				"Watching Hub events loop, event %s, time: %v, resource: %s (%s), reason: %s, note: %s",
-				event.Name,
-				event.CreationTimestamp.Time,
-				event.Regarding.Name,
-				event.Regarding.Kind,
-				event.Reason,
-				event.Note,
-			)
+			log.Debug().
+				Str("pod", kubernetes.HubPodName).
+				Str("event", event.Name).
+				Time("time", event.CreationTimestamp.Time).
+				Str("name", event.Regarding.Name).
+				Str("kind", event.Regarding.Kind).
+				Str("reason", event.Reason).
+				Str("note", event.Note).
+				Msg("Watching events.")
 
 			switch event.Reason {
 			case "FailedScheduling", "Failed":
-				log.Printf(utils.Error, fmt.Sprintf("Kubeshark Hub status: %s - %s", event.Reason, event.Note))
+				log.Error().
+					Str("pod", kubernetes.HubPodName).
+					Str("event", event.Name).
+					Time("time", event.CreationTimestamp.Time).
+					Str("name", event.Regarding.Name).
+					Str("kind", event.Regarding.Kind).
+					Str("reason", event.Reason).
+					Str("note", event.Note).
+					Msg("Watching events.")
 				cancel()
 
 			}
@@ -408,9 +441,15 @@ func watchHubEvents(ctx context.Context, kubernetesProvider *kubernetes.Provider
 				continue
 			}
 
-			log.Printf("[Error] Watching Hub events loop, error: %+v", err)
+			log.Error().
+				Str("pod", kubernetes.HubPodName).
+				Err(err).
+				Msg("While watching events.")
+
 		case <-ctx.Done():
-			log.Printf("Watching Hub events loop, ctx done")
+			log.Debug().
+				Str("pod", kubernetes.HubPodName).
+				Msg("Watching pod events, context done.")
 			return
 		}
 	}
@@ -420,19 +459,19 @@ func postHubStarted(ctx context.Context, kubernetesProvider *kubernetes.Provider
 	startProxyReportErrorIfAny(kubernetesProvider, ctx, cancel, kubernetes.HubServiceName, config.Config.Hub.PortForward.SrcPort, config.Config.Hub.PortForward.DstPort, "/echo")
 
 	if err := startTapperSyncer(ctx, cancel, kubernetesProvider, state.targetNamespaces, state.startTime); err != nil {
-		log.Printf(utils.Error, fmt.Sprintf("Error starting kubeshark tapper syncer: %v", errormessage.FormatError(err)))
+		log.Error().Err(errormessage.FormatError(err)).Msg("Error starting kubeshark tapper syncer")
 		cancel()
 	}
 
 	url := kubernetes.GetLocalhostOnPort(config.Config.Hub.PortForward.SrcPort)
-	log.Printf("Hub is available at %s", url)
+	log.Info().Msg(fmt.Sprintf("Hub is available at %s", url))
 }
 
 func postFrontStarted(ctx context.Context, kubernetesProvider *kubernetes.Provider, cancel context.CancelFunc) {
 	startProxyReportErrorIfAny(kubernetesProvider, ctx, cancel, kubernetes.FrontServiceName, config.Config.Front.PortForward.SrcPort, config.Config.Front.PortForward.DstPort, "")
 
 	url := kubernetes.GetLocalhostOnPort(config.Config.Front.PortForward.SrcPort)
-	log.Printf("Kubeshark is available at %s", url)
+	log.Info().Msg(fmt.Sprintf("Kubeshark is available at %s", url))
 	if !config.Config.HeadlessMode {
 		utils.OpenBrowser(url)
 	}
@@ -446,7 +485,7 @@ func getNamespaces(kubernetesProvider *kubernetes.Provider) []string {
 	} else {
 		currentNamespace, err := kubernetesProvider.CurrentNamespace()
 		if err != nil {
-			log.Fatalf(utils.Red, fmt.Sprintf("error getting current namespace: %+v", err))
+			log.Fatal().Err(err).Msg("Error getting current namespace!")
 		}
 		return []string{currentNamespace}
 	}

cmd/version.go

@@ -1,15 +1,13 @@
 package cmd
 
 import (
-	"log"
 	"strconv"
 	"time"
 
-	"github.com/kubeshark/kubeshark/config"
-	"github.com/kubeshark/kubeshark/config/configStructs"
-
 	"github.com/creasty/defaults"
+	"github.com/kubeshark/kubeshark/config/configStructs"
 	"github.com/kubeshark/kubeshark/kubeshark"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
@@ -17,14 +15,12 @@ var versionCmd = &cobra.Command{
 	Use:   "version",
 	Short: "Print version info",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		if config.Config.Version.DebugInfo {
 		timeStampInt, _ := strconv.ParseInt(kubeshark.BuildTimestamp, 10, 0)
-			log.Printf("Version: %s \nBranch: %s (%s)", kubeshark.Ver, kubeshark.Branch, kubeshark.GitCommitHash)
-			log.Printf("Build Time: %s (%s)", kubeshark.BuildTimestamp, time.Unix(timeStampInt, 0))
-
-		} else {
-			log.Printf("Version: %s (%s)", kubeshark.Ver, kubeshark.Branch)
-		}
+		log.Info().
+			Str("version", kubeshark.Ver).
+			Str("branch", kubeshark.Branch).
+			Str("commit-hash", kubeshark.GitCommitHash).
+			Time("build-time", time.Unix(timeStampInt, 0))
 		return nil
 	},
 }

cmd/view.go

@@ -1,10 +1,9 @@
 package cmd
 
 import (
-	"log"
-
 	"github.com/creasty/defaults"
 	"github.com/kubeshark/kubeshark/config/configStructs"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 )
 
@@ -22,13 +21,13 @@ func init() {
 
 	defaultViewConfig := configStructs.ViewConfig{}
 	if err := defaults.Set(&defaultViewConfig); err != nil {
-		log.Print(err)
+		log.Error().Err(err)
 	}
 
 	viewCmd.Flags().Uint16P(configStructs.GuiPortViewName, "p", defaultViewConfig.GuiPort, "Provide a custom port for the web interface webserver")
 	viewCmd.Flags().StringP(configStructs.UrlViewName, "u", defaultViewConfig.Url, "Provide a custom host")
 
 	if err := viewCmd.Flags().MarkHidden(configStructs.UrlViewName); err != nil {
-		log.Print(err)
+		log.Error().Err(err)
 	}
 }

cmd/viewRunner.go

@@ -3,14 +3,13 @@ package cmd
 import (
 	"context"
 	"fmt"
-	"log"
 	"net/http"
 
-	"github.com/kubeshark/kubeshark/internal/connect"
-	"github.com/kubeshark/kubeshark/utils"
-
 	"github.com/kubeshark/kubeshark/config"
+	"github.com/kubeshark/kubeshark/internal/connect"
 	"github.com/kubeshark/kubeshark/kubernetes"
+	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 )
 
 func runKubesharkView() {
@@ -27,12 +26,19 @@ func runKubesharkView() {
 	if url == "" {
 		exists, err := kubernetesProvider.DoesServiceExist(ctx, config.Config.ResourcesNamespace, kubernetes.HubServiceName)
 		if err != nil {
-			log.Printf("Failed to found kubeshark service %v", err)
+			log.Error().
+				Str("name", "kubeshark").
+				Err(err).
+				Msg("Failed to found service!")
 			cancel()
 			return
 		}
 		if !exists {
 			log.Printf("%s service not found, you should run `kubeshark tap` command first", kubernetes.HubServiceName)
+			log.Error().
+				Str("name", kubernetes.HubServiceName).
+				Str("tap-command", "kubeshark tap").
+				Msg("Service not found! You should run the tap command first:")
 			cancel()
 			return
 		}
@@ -41,20 +47,23 @@ func runKubesharkView() {
 
 		response, err := http.Get(fmt.Sprintf("%s/", url))
 		if err == nil && response.StatusCode == 200 {
-			log.Printf("Found a running service %s and open port %d", kubernetes.HubServiceName, config.Config.Front.PortForward.SrcPort)
+			log.Info().
+				Str("name", kubernetes.HubServiceName).
+				Int("port", int(config.Config.Front.PortForward.SrcPort)).
+				Msg("Found a running service.")
 			return
 		}
-		log.Printf("Establishing connection to k8s cluster...")
+		log.Info().Msg("Establishing connection to k8s cluster...")
 		startProxyReportErrorIfAny(kubernetesProvider, ctx, cancel, kubernetes.FrontServiceName, config.Config.Front.PortForward.SrcPort, config.Config.Front.PortForward.DstPort, "")
 	}
 
 	connector := connect.NewConnector(url, connect.DefaultRetries, connect.DefaultTimeout)
 	if err := connector.TestConnection(""); err != nil {
-		log.Printf(utils.Error, "Couldn't connect to Hub.")
+		log.Error().Msg(fmt.Sprintf(utils.Error, "Couldn't connect to Hub."))
 		return
 	}
 
-	log.Printf("Kubeshark is available at %s", url)
+	log.Info().Msg(fmt.Sprintf("Kubeshark is available at %s", url))
 
 	if !config.Config.HeadlessMode {
 		utils.OpenBrowser(url)

config/config.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log"
 	"os"
 	"reflect"
 	"strconv"
@@ -12,6 +11,8 @@ import (
 
 	"github.com/creasty/defaults"
 	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 	"gopkg.in/yaml.v3"
@@ -22,6 +23,7 @@ const (
 	SetCommandName = "set"
 	FieldNameTag   = "yaml"
 	ReadonlyTag    = "readonly"
+	DebugFlag      = "debug"
 )
 
 var (
@@ -30,6 +32,15 @@ var (
 )
 
 func InitConfig(cmd *cobra.Command) error {
+	debugMode, err := cmd.Flags().GetBool(DebugFlag)
+	if err != nil {
+		log.Error().Err(err).Msg(fmt.Sprintf("Can't recieve '%s' flag", DebugFlag))
+	}
+
+	if debugMode {
+		zerolog.SetGlobalLevel(zerolog.DebugLevel)
+	}
+
 	Config.Hub = HubConfig{
 		PortForward{
 			8898,
@@ -64,8 +75,7 @@ func InitConfig(cmd *cobra.Command) error {
 		return fmt.Errorf("config validation failed, err: %v", err)
 	}
 
-	finalConfigPrettified, _ := utils.PrettyJson(Config)
-	log.Printf("Init config finished\n Final config: %v", finalConfigPrettified)
+	log.Debug().Interface("config", Config).Msg("Init config is finished.")
 
 	return nil
 }
@@ -111,7 +121,7 @@ func loadConfigFile(configFilePath string, config *ConfigStruct) error {
 		return err
 	}
 
-	log.Printf("Found config file, config path: %s", configFilePath)
+	log.Info().Str("path", configFilePath).Msg("Found config file!")
 
 	return nil
 }
@@ -129,20 +139,20 @@ func initFlag(f *pflag.Flag) {
 	sliceValue, isSliceValue := f.Value.(pflag.SliceValue)
 	if !isSliceValue {
 		if err := mergeFlagValue(configElemValue, flagPath, strings.Join(flagPath, "."), f.Value.String()); err != nil {
-			log.Printf(utils.Warning, err)
+			log.Warn().Err(err)
 		}
 		return
 	}
 
 	if f.Name == SetCommandName {
 		if err := mergeSetFlag(configElemValue, sliceValue.GetSlice()); err != nil {
-			log.Printf(utils.Warning, err)
+			log.Warn().Err(err)
 		}
 		return
 	}
 
 	if err := mergeFlagValues(configElemValue, flagPath, strings.Join(flagPath, "."), sliceValue.GetSlice()); err != nil {
-		log.Printf(utils.Warning, err)
+		log.Warn().Err(err)
 	}
 }
 

config/configStruct.go

@@ -9,7 +9,8 @@ import (
 	"github.com/kubeshark/kubeshark/config/configStructs"
 	"github.com/kubeshark/kubeshark/kubeshark"
 	"github.com/kubeshark/worker/models"
-	"github.com/op/go-logging"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/client-go/util/homedir"
 )
@@ -69,13 +70,13 @@ type ConfigStruct struct {
 	KubeContext        string                      `yaml:"kube-context"`
 	ConfigFilePath     string                      `yaml:"config-path,omitempty" readonly:""`
 	HeadlessMode       bool                        `yaml:"headless" default:"false"`
-	LogLevelStr        string                      `yaml:"log-level,omitempty" default:"INFO" readonly:""`
+	LogLevelStr        string                      `yaml:"log-level,omitempty" default:"info" readonly:""`
 	ServiceMap         bool                        `yaml:"service-map" default:"true"`
 	OAS                models.OASConfig            `yaml:"oas"`
 }
 
 func (config *ConfigStruct) validate() error {
-	if _, err := logging.LogLevel(config.LogLevelStr); err != nil {
+	if _, err := zerolog.ParseLevel(config.LogLevelStr); err != nil {
 		return fmt.Errorf("%s is not a valid log level, err: %v", config.LogLevelStr, err)
 	}
 
@@ -108,7 +109,10 @@ func (config *ConfigStruct) KubeConfigPath() string {
 	return filepath.Join(home, ".kube", "config")
 }
 
-func (config *ConfigStruct) LogLevel() logging.Level {
-	logLevel, _ := logging.LogLevel(config.LogLevelStr)
+func (config *ConfigStruct) LogLevel() zerolog.Level {
+	logLevel, err := zerolog.ParseLevel(config.LogLevelStr)
+	if err != nil {
+		log.Error().Err(err).Str("log-level", config.LogLevelStr).Msg("Invalid log level")
+	}
 	return logLevel
 }

config/configStructs/tapConfig.go

@@ -3,13 +3,13 @@ package configStructs
 import (
 	"fmt"
 	"io/fs"
-	"log"
 	"os"
 	"regexp"
 	"strings"
 
 	"github.com/kubeshark/kubeshark/utils"
 	"github.com/kubeshark/worker/models"
+	"github.com/rs/zerolog/log"
 )
 
 const (
@@ -69,7 +69,7 @@ func (config *TapConfig) GetInsertionFilter() string {
 		if _, err := os.Stat(insertionFilter); err == nil {
 			b, err := os.ReadFile(insertionFilter)
 			if err != nil {
-				log.Printf(utils.Warning, fmt.Sprintf("Couldn't read the file on path: %s, err: %v", insertionFilter, err))
+				log.Warn().Err(err).Str("insertion-filter-path", insertionFilter).Msg("Couldn't read the file! Defaulting to string.")
 			} else {
 				insertionFilter = string(b)
 			}
@@ -78,6 +78,7 @@ func (config *TapConfig) GetInsertionFilter() string {
 
 	redactFilter := getRedactFilter(config)
 	if insertionFilter != "" && redactFilter != "" {
+		log.Info().Str("filter", insertionFilter).Msg("Using insertion filter:")
 		return fmt.Sprintf("(%s) and (%s)", insertionFilter, redactFilter)
 	} else if insertionFilter == "" && redactFilter != "" {
 		return redactFilter

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/docker/go-units v0.4.0
 	github.com/google/go-github/v37 v37.0.0
 	github.com/kubeshark/worker v0.1.4
-	github.com/op/go-logging v0.0.0-20160315200505-970db520ece7
+	github.com/rs/zerolog v1.28.0
 	github.com/spf13/cobra v1.3.0
 	github.com/spf13/pflag v1.0.5
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
@@ -56,6 +56,8 @@ require (
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
 	github.com/moby/spdystream v0.2.0 // indirect
 	github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6 // indirect
@@ -63,6 +65,7 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/monochromegane/go-gitignore v0.0.0-20200626010858-205db1a8cc00 // indirect
 	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
+	github.com/op/go-logging v0.0.0-20160315200505-970db520ece7 // indirect
 	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
@@ -74,7 +77,7 @@ require (
 	golang.org/x/crypto v0.0.0-20220208050332-20e1d8d225ab // indirect
 	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
 	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
-	golang.org/x/sys v0.0.0-20220207234003-57398862261d // indirect
+	golang.org/x/sys v0.2.0 // indirect
 	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
 	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11 // indirect

go.sum

@@ -136,6 +136,7 @@ github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3Ee
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
@@ -442,12 +443,16 @@ github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVc
 github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
 github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
 github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
 github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
 github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
 github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+github.com/mattn/go-isatty v0.0.16 h1:bq3VjFmv/sOjHtdEhmkEV4x1AJtvUvOJ2PFAZ5+peKQ=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
@@ -554,6 +559,9 @@ github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6So
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
+github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
+github.com/rs/zerolog v1.28.0 h1:MirSo27VyNi7RJYP3078AA1+Cyzd2GB66qy3aUHvsWY=
+github.com/rs/zerolog v1.28.0/go.mod h1:NILgTygv/Uej1ra5XxGf82ZFSLk58MFGAUS2o6usyD0=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/russross/blackfriday v1.6.0 h1:KqfZb0pUVN2lYqZUYRddxF4OR8ZMURnJIG5Y3VRLtww=
 github.com/russross/blackfriday v1.6.0/go.mod h1:ti0ldHuxg49ri4ksnFxlkCfN+hvslNlmVHqNRXXJNAY=
@@ -891,8 +899,10 @@ golang.org/x/sys v0.0.0-20211210111614-af8b64212486/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220207234003-57398862261d h1:Bm7BNOQt2Qv7ZqysjeLjgCBanX+88Z/OtdvsrEv1Djc=
 golang.org/x/sys v0.0.0-20220207234003-57398862261d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=

internal/connect/hub.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"log"
 	"net/http"
 	"time"
 
@@ -12,6 +11,7 @@ import (
 	"github.com/kubeshark/worker/models"
 
 	"github.com/kubeshark/kubeshark/config"
+	"github.com/rs/zerolog/log"
 	core "k8s.io/api/core/v1"
 )
 
@@ -38,9 +38,9 @@ func (connector *Connector) TestConnection(path string) error {
 	retriesLeft := connector.retries
 	for retriesLeft > 0 {
 		if isReachable, err := connector.isReachable(path); err != nil || !isReachable {
-			log.Printf("Hub is not ready yet %v!", err)
+			log.Debug().Err(err).Msg("Hub is not ready yet!")
 		} else {
-			log.Printf("Connection test to Hub passed successfully!")
+			log.Debug().Msg("Connection test to Hub passed successfully.")
 			break
 		}
 		retriesLeft -= 1
@@ -71,7 +71,7 @@ func (connector *Connector) ReportTapperStatus(tapperStatus models.TapperStatus)
 		if _, err := utils.Post(tapperStatusUrl, "application/json", bytes.NewBuffer(jsonValue), connector.client); err != nil {
 			return fmt.Errorf("Failed sending to Hub the tapped pods %w", err)
 		} else {
-			log.Printf("Reported to Hub about tapper status: %v", tapperStatus)
+			log.Debug().Interface("tapper-status", tapperStatus).Msg("Reported to Hub about tapper status:")
 			return nil
 		}
 	}
@@ -86,7 +86,7 @@ func (connector *Connector) ReportTappedPods(pods []core.Pod) error {
 		if _, err := utils.Post(tappedPodsUrl, "application/json", bytes.NewBuffer(jsonValue), connector.client); err != nil {
 			return fmt.Errorf("Failed sending to Hub the tapped pods %w", err)
 		} else {
-			log.Printf("Reported to Hub about %d taped pods successfully", len(pods))
+			log.Debug().Int("pod-count", len(pods)).Msg("Reported to Hub about tapped pod count:")
 			return nil
 		}
 	}

kubernetes/kubesharkTapperSyncer.go

@@ -3,7 +3,6 @@ package kubernetes
 import (
 	"context"
 	"fmt"
-	"log"
 	"regexp"
 	"time"
 
@@ -11,7 +10,8 @@ import (
 	"github.com/kubeshark/kubeshark/utils"
 	"github.com/kubeshark/worker/api"
 	"github.com/kubeshark/worker/models"
-	"github.com/op/go-logging"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	core "k8s.io/api/core/v1"
 )
 
@@ -42,7 +42,7 @@ type TapperSyncerConfig struct {
 	KubesharkResourcesNamespace   string
 	TapperResources               models.Resources
 	ImagePullPolicy               core.PullPolicy
-	LogLevel                      logging.Level
+	LogLevel                      zerolog.Level
 	KubesharkApiFilteringOptions  api.TrafficFilteringOptions
 	KubesharkServiceAccountExists bool
 	ServiceMesh                   bool
@@ -91,11 +91,15 @@ func (tapperSyncer *KubesharkTapperSyncer) watchTapperPods() {
 
 			pod, err := wEvent.ToPod()
 			if err != nil {
-				log.Printf("[ERROR] parsing Kubeshark resource pod: %+v", err)
+				log.Error().Str("pod", TapperPodName).Err(err).Msg("While parsing Kubeshark resource!")
 				continue
 			}
 
-			log.Printf("Watching tapper pods loop, tapper: %v, node: %v, status: %v", pod.Name, pod.Spec.NodeName, pod.Status.Phase)
+			log.Debug().
+				Str("pod", pod.Name).
+				Str("node", pod.Spec.NodeName).
+				Interface("phase", pod.Status.Phase).
+				Msg("Watching pod events...")
 			if pod.Spec.NodeName != "" {
 				tapperStatus := models.TapperStatus{TapperName: pod.Name, NodeName: pod.Spec.NodeName, Status: string(pod.Status.Phase)}
 				tapperSyncer.TapperStatusChangedOut <- tapperStatus
@@ -106,10 +110,12 @@ func (tapperSyncer *KubesharkTapperSyncer) watchTapperPods() {
 				errorChan = nil
 				continue
 			}
-			log.Printf("[ERROR] Watching tapper pods loop, error: %+v", err)
+			log.Error().Str("pod", TapperPodName).Err(err).Msg("While watching pod!")
 
 		case <-tapperSyncer.context.Done():
-			log.Printf("Watching tapper pods loop, ctx done")
+			log.Debug().
+				Str("pod", TapperPodName).
+				Msg("Watching pod, context done.")
 			return
 		}
 	}
@@ -130,23 +136,26 @@ func (tapperSyncer *KubesharkTapperSyncer) watchTapperEvents() {
 
 			event, err := wEvent.ToEvent()
 			if err != nil {
-				log.Printf("[ERROR] parsing Kubeshark resource event: %+v", err)
+				log.Error().
+					Str("pod", TapperPodName).
+					Err(err).
+					Msg("Parsing resource event.")
 				continue
 			}
 
-			log.Printf(
-				"Watching tapper events loop, event %s, time: %v, resource: %s (%s), reason: %s, note: %s",
-				event.Name,
-				event.CreationTimestamp.Time,
-				event.Regarding.Name,
-				event.Regarding.Kind,
-				event.Reason,
-				event.Note,
-			)
+			log.Debug().
+				Str("pod", TapperPodName).
+				Str("event", event.Name).
+				Time("time", event.CreationTimestamp.Time).
+				Str("name", event.Regarding.Name).
+				Str("kind", event.Regarding.Kind).
+				Str("reason", event.Reason).
+				Str("note", event.Note).
+				Msg("Watching events.")
 
 			pod, err1 := tapperSyncer.kubernetesProvider.GetPod(tapperSyncer.context, tapperSyncer.config.KubesharkResourcesNamespace, event.Regarding.Name)
 			if err1 != nil {
-				log.Printf("Couldn't get tapper pod %s", event.Regarding.Name)
+				log.Error().Str("name", event.Regarding.Name).Msg("Couldn't get pod")
 				continue
 			}
 
@@ -166,10 +175,15 @@ func (tapperSyncer *KubesharkTapperSyncer) watchTapperEvents() {
 				continue
 			}
 
-			log.Printf("[ERROR] Watching tapper events loop, error: %+v", err)
+			log.Error().
+				Str("pod", TapperPodName).
+				Err(err).
+				Msg("While watching events.")
 
 		case <-tapperSyncer.context.Done():
-			log.Printf("Watching tapper events loop, ctx done")
+			log.Debug().
+				Str("pod", TapperPodName).
+				Msg("Watching pod events, context done.")
 			return
 		}
 	}
@@ -189,7 +203,7 @@ func (tapperSyncer *KubesharkTapperSyncer) watchPodsForTapping() {
 		}
 
 		if !changeFound {
-			log.Printf("Nothing changed update tappers not needed")
+			log.Debug().Msg("Nothing changed. Updating tappers is not needed.")
 			return
 		}
 		if err := tapperSyncer.updateKubesharkTappers(); err != nil {
@@ -217,17 +231,37 @@ func (tapperSyncer *KubesharkTapperSyncer) watchPodsForTapping() {
 
 			switch wEvent.Type {
 			case EventAdded:
-				log.Printf("Added matching pod %s, ns: %s", pod.Name, pod.Namespace)
+				log.Debug().
+					Str("pod", pod.Name).
+					Str("namespace", pod.Namespace).
+					Msg("Added matching pod.")
 				if err := restartTappersDebouncer.SetOn(); err != nil {
-					log.Print(err)
+					log.Error().
+						Str("pod", pod.Name).
+						Str("namespace", pod.Namespace).
+						Err(err).
+						Msg("While restarting tappers!")
 				}
 			case EventDeleted:
-				log.Printf("Removed matching pod %s, ns: %s", pod.Name, pod.Namespace)
+				log.Debug().
+					Str("pod", pod.Name).
+					Str("namespace", pod.Namespace).
+					Msg("Removed matching pod.")
 				if err := restartTappersDebouncer.SetOn(); err != nil {
-					log.Print(err)
+					log.Error().
+						Str("pod", pod.Name).
+						Str("namespace", pod.Namespace).
+						Err(err).
+						Msg("While restarting tappers!")
 				}
 			case EventModified:
-				log.Printf("Modified matching pod %s, ns: %s, phase: %s, ip: %s", pod.Name, pod.Namespace, pod.Status.Phase, pod.Status.PodIP)
+				log.Debug().
+					Str("pod", pod.Name).
+					Str("namespace", pod.Namespace).
+					Str("ip", pod.Status.PodIP).
+					Interface("phase", pod.Status.Phase).
+					Msg("Modified matching pod.")
+
 				// Act only if the modified pod has already obtained an IP address.
 				// After filtering for IPs, on a normal pod restart this includes the following events:
 				// - Pod deletion
@@ -236,7 +270,11 @@ func (tapperSyncer *KubesharkTapperSyncer) watchPodsForTapping() {
 				// Ready/unready transitions might also trigger this event.
 				if pod.Status.PodIP != "" {
 					if err := restartTappersDebouncer.SetOn(); err != nil {
-						log.Print(err)
+						log.Error().
+							Str("pod", pod.Name).
+							Str("namespace", pod.Namespace).
+							Err(err).
+							Msg("While restarting tappers!")
 					}
 				}
 			case EventBookmark:
@@ -254,7 +292,7 @@ func (tapperSyncer *KubesharkTapperSyncer) watchPodsForTapping() {
 			continue
 
 		case <-tapperSyncer.context.Done():
-			log.Printf("Watching pods loop, context done, stopping `restart tappers debouncer`")
+			log.Debug().Msg("Watching pods, context done. Stopping \"restart tappers debouncer\"")
 			restartTappersDebouncer.Cancel()
 			// TODO: Does this also perform cleanup?
 			return
@@ -263,7 +301,7 @@ func (tapperSyncer *KubesharkTapperSyncer) watchPodsForTapping() {
 }
 
 func (tapperSyncer *KubesharkTapperSyncer) handleErrorInWatchLoop(err error, restartTappersDebouncer *debounce.Debouncer) {
-	log.Printf("Watching pods loop, got error %v, stopping `restart tappers debouncer`", err)
+	log.Error().Err(err).Msg("While watching pods, got an error! Stopping \"restart tappers debouncer\"")
 	restartTappersDebouncer.Cancel()
 	tapperSyncer.ErrorOut <- K8sTapManagerError{
 		OriginalError:    err,
@@ -278,10 +316,10 @@ func (tapperSyncer *KubesharkTapperSyncer) updateCurrentlyTappedPods() (err erro
 		podsToTap := excludeKubesharkPods(matchingPods)
 		addedPods, removedPods := getPodArrayDiff(tapperSyncer.CurrentlyTappedPods, podsToTap)
 		for _, addedPod := range addedPods {
-			log.Printf("tapping new pod %s", addedPod.Name)
+			log.Info().Str("pod", addedPod.Name).Msg("Tapping new pod.")
 		}
 		for _, removedPod := range removedPods {
-			log.Printf("pod %s is no longer running, tapping for it stopped", removedPod.Name)
+			log.Info().Str("pod", removedPod.Name).Msg("Pod is no longer running. Tapping is stopped.")
 		}
 		if len(addedPods) > 0 || len(removedPods) > 0 {
 			tapperSyncer.CurrentlyTappedPods = podsToTap
@@ -305,11 +343,11 @@ func (tapperSyncer *KubesharkTapperSyncer) updateKubesharkTappers() error {
 	}
 
 	if utils.EqualStringSlices(nodesToTap, tapperSyncer.tappedNodes) {
-		log.Print("Skipping apply, DaemonSet is up to date")
+		log.Debug().Msg("Skipping apply, DaemonSet is up to date")
 		return nil
 	}
 
-	log.Printf("Updating DaemonSet to run on nodes: %v", nodesToTap)
+	log.Debug().Strs("nodes", nodesToTap).Msg("Updating DaemonSet to run on nodes.")
 
 	image := "kubeshark/worker:latest"
 
@@ -345,7 +383,7 @@ func (tapperSyncer *KubesharkTapperSyncer) updateKubesharkTappers() error {
 			return err
 		}
 
-		log.Printf("Successfully created %v tappers", len(tapperSyncer.nodeToTappedPodMap))
+		log.Debug().Int("tapper-count", len(tapperSyncer.nodeToTappedPodMap)).Msg("Successfully created tappers.")
 	} else {
 		if err := tapperSyncer.kubernetesProvider.ResetKubesharkTapperDaemonSet(
 			tapperSyncer.context,
@@ -356,7 +394,7 @@ func (tapperSyncer *KubesharkTapperSyncer) updateKubesharkTappers() error {
 			return err
 		}
 
-		log.Printf("Successfully reset tapper daemon set")
+		log.Debug().Msg("Successfully reset tapper daemon set")
 	}
 
 	tapperSyncer.tappedNodes = nodesToTap

kubernetes/provider.go

@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log"
 	"net/url"
 	"path/filepath"
 	"regexp"
@@ -17,7 +16,8 @@ import (
 	"github.com/kubeshark/kubeshark/utils"
 	"github.com/kubeshark/worker/api"
 	"github.com/kubeshark/worker/models"
-	"github.com/op/go-logging"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	auth "k8s.io/api/authorization/v1"
 	core "k8s.io/api/core/v1"
 	rbac "k8s.io/api/rbac/v1"
@@ -78,7 +78,11 @@ func NewProvider(kubeConfigPath string, contextName string) (*Provider, error) {
 			"you can set alternative kube config file path by adding the kube-config-path field to the kubeshark config file, err:  %w", kubeConfigPath, err)
 	}
 
-	log.Printf("K8s client config, host: %s, api path: %s, user agent: %s", restClientConfig.Host, restClientConfig.APIPath, restClientConfig.UserAgent)
+	log.Debug().
+		Str("host", restClientConfig.Host).
+		Str("api-path", restClientConfig.APIPath).
+		Str("user-agent", restClientConfig.UserAgent).
+		Msg("K8s client config.")
 
 	return &Provider{
 		clientSet:        clientSet,
@@ -181,7 +185,7 @@ type HubOptions struct {
 	MaxEntriesDBSizeBytes int64
 	Resources             models.Resources
 	ImagePullPolicy       core.PullPolicy
-	LogLevel              logging.Level
+	LogLevel              zerolog.Level
 	Profiler              bool
 }
 
@@ -806,8 +810,14 @@ func (provider *Provider) CreateConfigMap(ctx context.Context, namespace string,
 	return nil
 }
 
-func (provider *Provider) ApplyKubesharkTapperDaemonSet(ctx context.Context, namespace string, daemonSetName string, podImage string, tapperPodName string, hubPodIp string, nodeNames []string, serviceAccountName string, resources models.Resources, imagePullPolicy core.PullPolicy, kubesharkApiFilteringOptions api.TrafficFilteringOptions, logLevel logging.Level, serviceMesh bool, tls bool, maxLiveStreams int) error {
-	log.Printf("Applying %d tapper daemon sets, ns: %s, daemonSetName: %s, podImage: %s, tapperPodName: %s", len(nodeNames), namespace, daemonSetName, podImage, tapperPodName)
+func (provider *Provider) ApplyKubesharkTapperDaemonSet(ctx context.Context, namespace string, daemonSetName string, podImage string, tapperPodName string, hubPodIp string, nodeNames []string, serviceAccountName string, resources models.Resources, imagePullPolicy core.PullPolicy, kubesharkApiFilteringOptions api.TrafficFilteringOptions, logLevel zerolog.Level, serviceMesh bool, tls bool, maxLiveStreams int) error {
+	log.Debug().
+		Int("node-count", len(nodeNames)).
+		Str("namespace", namespace).
+		Str("daemonset-name", daemonSetName).
+		Str("image", podImage).
+		Str("pod-name", tapperPodName).
+		Msg("Applying tapper DaemonSets.")
 
 	if len(nodeNames) == 0 {
 		return fmt.Errorf("daemon set %s must tap at least 1 pod", daemonSetName)
@@ -1159,7 +1169,7 @@ func (provider *Provider) ListManagedRoleBindings(ctx context.Context, namespace
 func (provider *Provider) ValidateNotProxy() error {
 	kubernetesUrl, err := url.Parse(provider.clientConfig.Host)
 	if err != nil {
-		log.Printf("ValidateNotProxy - error while parsing kubernetes host, err: %v", err)
+		log.Debug().Err(err).Msg("While parsing Kubernetes host!")
 		return nil
 	}
 
@@ -1184,7 +1194,7 @@ func (provider *Provider) ValidateNotProxy() error {
 func (provider *Provider) GetKubernetesVersion() (*semver.SemVersion, error) {
 	serverVersion, err := provider.clientSet.ServerVersion()
 	if err != nil {
-		log.Printf("error while getting kubernetes server version, err: %v", err)
+		log.Debug().Err(err).Msg("While getting Kubernetes server version!")
 		return nil, err
 	}
 
@@ -1211,7 +1221,7 @@ func ValidateKubernetesVersion(serverVersionSemVer *semver.SemVersion) error {
 }
 
 func loadKubernetesConfiguration(kubeConfigPath string, context string) clientcmd.ClientConfig {
-	log.Printf("Using kube config %s", kubeConfigPath)
+	log.Info().Str("path", kubeConfigPath).Msg("Using kubeconfig:")
 	configPathList := filepath.SplitList(kubeConfigPath)
 	configLoadingRules := &clientcmd.ClientConfigLoadingRules{}
 	if len(configPathList) <= 1 {

kubernetes/proxy.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"log"
 	"net"
 	"net/http"
 	"net/url"
@@ -12,10 +11,10 @@ import (
 	"strings"
 	"time"
 
+	"github.com/rs/zerolog/log"
 	"k8s.io/apimachinery/pkg/util/httpstream"
 	"k8s.io/client-go/tools/portforward"
 	"k8s.io/client-go/transport/spdy"
-
 	"k8s.io/kubectl/pkg/proxy"
 )
 
@@ -23,7 +22,13 @@ const k8sProxyApiPrefix = "/"
 const kubesharkServicePort = 80
 
 func StartProxy(kubernetesProvider *Provider, proxyHost string, srcPort uint16, dstPort uint16, kubesharkNamespace string, kubesharkServiceName string, cancel context.CancelFunc) (*http.Server, error) {
-	log.Printf("Starting proxy - namespace: [%v], service name: [%s], port: [%d:%d]\n", kubesharkNamespace, kubesharkServiceName, srcPort, dstPort)
+	log.Info().
+		Str("namespace", kubesharkNamespace).
+		Str("service-name", kubesharkServiceName).
+		Int("src-port", int(srcPort)).
+		Int("dst-port", int(dstPort)).
+		Msg("Starting proxy...")
+
 	filter := &proxy.FilterServer{
 		AcceptPaths:   proxy.MakeRegexpArrayOrDie(proxy.DefaultPathAcceptRE),
 		RejectPaths:   proxy.MakeRegexpArrayOrDie(proxy.DefaultPathRejectRE),
@@ -50,7 +55,7 @@ func StartProxy(kubernetesProvider *Provider, proxyHost string, srcPort uint16,
 
 	go func() {
 		if err := server.Serve(l); err != nil && err != http.ErrServerClosed {
-			log.Printf("Error creating proxy, %v", err)
+			log.Error().Err(err).Msg("While creating proxy!")
 			cancel()
 		}
 	}()
@@ -105,7 +110,12 @@ func NewPortForward(kubernetesProvider *Provider, namespace string, podRegex *re
 
 	podName := pods[0].Name
 
-	log.Printf("Starting proxy using port-forward method. namespace: [%v], pod name: [%s], %d:%d", namespace, podName, srcPort, dstPort)
+	log.Info().
+		Str("namespace", namespace).
+		Str("pod-name", podName).
+		Int("src-port", int(srcPort)).
+		Int("dst-port", int(dstPort)).
+		Msg("Starting proxy using port-forward method...")
 
 	dialer, err := getHttpDialer(kubernetesProvider, namespace, podName)
 	if err != nil {
@@ -122,7 +132,7 @@ func NewPortForward(kubernetesProvider *Provider, namespace string, podRegex *re
 
 	go func() {
 		if err = forwarder.ForwardPorts(); err != nil {
-			log.Printf("kubernetes port-forwarding error: %v", err)
+			log.Error().Err(err).Msg("While Kubernetes port-forwarding!")
 			cancel()
 		}
 	}()
@@ -133,7 +143,7 @@ func NewPortForward(kubernetesProvider *Provider, namespace string, podRegex *re
 func getHttpDialer(kubernetesProvider *Provider, namespace string, podName string) (httpstream.Dialer, error) {
 	roundTripper, upgrader, err := spdy.RoundTripperFor(&kubernetesProvider.clientConfig)
 	if err != nil {
-		log.Printf("Error creating http dialer")
+		log.Error().Err(err).Msg("While creating HTTP dialer!")
 		return nil, err
 	}
 
@@ -144,7 +154,9 @@ func getHttpDialer(kubernetesProvider *Provider, namespace string, podName strin
 	path := fmt.Sprintf("%s/api/v1/namespaces/%s/pods/%s/portforward", clientConfigHostUrl.Path, namespace, podName)
 
 	serverURL := url.URL{Scheme: "https", Path: path, Host: clientConfigHostUrl.Host}
-	log.Printf("Http dialer url %v", serverURL)
+	log.Debug().
+		Str("url", serverURL.String()).
+		Msg("HTTP dialer URL:")
 
 	return spdy.NewDialer(upgrader, &http.Client{Transport: roundTripper}, http.MethodPost, &serverURL), nil
 }

kubernetes/watch.go

@@ -4,12 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"log"
 	"sync"
 	"time"
 
 	"github.com/kubeshark/kubeshark/debounce"
-
+	"github.com/rs/zerolog/log"
 	"k8s.io/apimachinery/pkg/watch"
 )
 
@@ -57,13 +56,13 @@ func FilteredWatch(ctx context.Context, watcherCreator WatchCreator, targetNames
 				} else {
 					if !watchRestartDebouncer.IsOn() {
 						if err := watchRestartDebouncer.SetOn(); err != nil {
-							log.Print(err)
+							log.Error().Err(err)
 						}
-						log.Print("k8s watch channel closed, restarting watcher")
+						log.Warn().Msg("K8s watch channel closed, restarting watcher...")
 						time.Sleep(time.Second * 5)
 						continue
 					} else {
-						errorChan <- errors.New("k8s watch unstable, closes frequently")
+						errorChan <- errors.New("K8s watch unstable, closes frequently")
 						break
 					}
 				}

kubeshark.go

@@ -1,10 +1,17 @@
 package main
 
 import (
+	"os"
+	"time"
+
 	"github.com/kubeshark/kubeshark/cmd"
 	"github.com/kubeshark/kubeshark/cmd/goUtils"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 )
 
 func main() {
+	zerolog.SetGlobalLevel(zerolog.InfoLevel)
+	log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr, TimeFormat: time.RFC3339})
 	goUtils.HandleExcWrapper(cmd.Execute)
 }

kubeshark/fsUtils/kubesharkLogsUtils.go

@@ -4,12 +4,12 @@ import (
 	"archive/zip"
 	"context"
 	"fmt"
-	"log"
 	"os"
 	"regexp"
 
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/kubernetes"
+	"github.com/rs/zerolog/log"
 )
 
 func DumpLogs(ctx context.Context, provider *kubernetes.Provider, filePath string) error {
@@ -35,39 +35,49 @@ func DumpLogs(ctx context.Context, provider *kubernetes.Provider, filePath strin
 		for _, container := range pod.Spec.Containers {
 			logs, err := provider.GetPodLogs(ctx, pod.Namespace, pod.Name, container.Name)
 			if err != nil {
-				log.Printf("Failed to get logs, %v", err)
+				log.Error().Err(err).Msg("Failed to get logs!")
 				continue
 			} else {
-				log.Printf("Successfully read log length %d for pod: %s.%s.%s", len(logs), pod.Namespace, pod.Name, container.Name)
+				log.Debug().
+					Int("length", len(logs)).
+					Str("namespace", pod.Namespace).
+					Str("pod", pod.Name).
+					Str("container", container.Name).
+					Msg("Successfully read log length.")
 			}
 
 			if err := AddStrToZip(zipWriter, logs, fmt.Sprintf("%s.%s.%s.log", pod.Namespace, pod.Name, container.Name)); err != nil {
-				log.Printf("Failed write logs, %v", err)
+				log.Error().Err(err).Msg("Failed write logs!")
 			} else {
-				log.Printf("Successfully added log length %d from pod: %s.%s.%s", len(logs), pod.Namespace, pod.Name, container.Name)
+				log.Debug().
+					Int("length", len(logs)).
+					Str("namespace", pod.Namespace).
+					Str("pod", pod.Name).
+					Str("container", container.Name).
+					Msg("Successfully added log length.")
 			}
 		}
 	}
 
 	events, err := provider.GetNamespaceEvents(ctx, config.Config.ResourcesNamespace)
 	if err != nil {
-		log.Printf("Failed to get k8b events, %v", err)
+		log.Error().Err(err).Msg("Failed to get k8b events!")
 	} else {
-		log.Printf("Successfully read events for k8b namespace: %s", config.Config.ResourcesNamespace)
+		log.Debug().Str("namespace", config.Config.ResourcesNamespace).Msg("Successfully read events.")
 	}
 
 	if err := AddStrToZip(zipWriter, events, fmt.Sprintf("%s_events.log", config.Config.ResourcesNamespace)); err != nil {
-		log.Printf("Failed write logs, %v", err)
+		log.Error().Err(err).Msg("Failed write logs!")
 	} else {
-		log.Printf("Successfully added events for k8b namespace: %s", config.Config.ResourcesNamespace)
+		log.Debug().Str("namespace", config.Config.ResourcesNamespace).Msg("Successfully added events.")
 	}
 
 	if err := AddFileToZip(zipWriter, config.Config.ConfigFilePath); err != nil {
-		log.Printf("Failed write file, %v", err)
+		log.Error().Err(err).Msg("Failed write file!")
 	} else {
-		log.Printf("Successfully added file %s", config.Config.ConfigFilePath)
+		log.Debug().Str("file-path", config.Config.ConfigFilePath).Msg("Successfully added file.")
 	}
 
-	log.Printf("You can find the zip file with all logs in %s", filePath)
+	log.Info().Str("path", filePath).Msg("You can find the ZIP file with all logs at:")
 	return nil
 }

kubeshark/fsUtils/zipUtils.go

@@ -4,10 +4,11 @@ import (
 	"archive/zip"
 	"fmt"
 	"io"
-	"log"
 	"os"
 	"path/filepath"
 	"strings"
+
+	"github.com/rs/zerolog/log"
 )
 
 func AddFileToZip(zipWriter *zip.Writer, filename string) error {
@@ -83,7 +84,7 @@ func Unzip(reader *zip.Reader, dest string) error {
 			_ = os.MkdirAll(path, f.Mode())
 		} else {
 			_ = os.MkdirAll(filepath.Dir(path), f.Mode())
-			log.Printf("writing HAR file [ %v ]", path)
+			log.Info().Str("path", path).Msg("Writing HAR file...")
 			f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
 			if err != nil {
 				return err
@@ -92,7 +93,7 @@ func Unzip(reader *zip.Reader, dest string) error {
 				if err := f.Close(); err != nil {
 					panic(err)
 				}
-				log.Print(" done")
+				log.Info().Str("path", path).Msg("HAR file at:")
 			}()
 
 			_, err = io.Copy(f, rc)

kubeshark/version/versionCheck.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"log"
 	"net/http"
 	"runtime"
 	"strings"
@@ -12,18 +11,19 @@ import (
 
 	"github.com/kubeshark/kubeshark/kubeshark"
 	"github.com/kubeshark/kubeshark/pkg/version"
+	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 
 	"github.com/google/go-github/v37/github"
 )
 
-func CheckNewerVersion(versionChan chan string) {
-	log.Printf("Checking for newer version...")
+func CheckNewerVersion() {
+	log.Info().Msg("Checking for newer version...")
 	start := time.Now()
 	client := github.NewClient(nil)
 	latestRelease, _, err := client.Repositories.GetLatestRelease(context.Background(), "kubeshark", "kubeshark")
 	if err != nil {
-		log.Printf("[ERROR] Failed to get latest release")
-		versionChan <- ""
+		log.Error().Msg("Failed to get latest release.")
 		return
 	}
 
@@ -35,23 +35,20 @@ func CheckNewerVersion(versionChan chan string) {
 		}
 	}
 	if versionFileUrl == "" {
-		log.Printf("[ERROR] Version file not found in the latest release")
-		versionChan <- ""
+		log.Error().Msg("Version file not found in the latest release.")
 		return
 	}
 
 	res, err := http.Get(versionFileUrl)
 	if err != nil {
-		log.Printf("[ERROR] Failed to get the version file %v", err)
-		versionChan <- ""
+		log.Error().Err(err).Msg("Failed to get the version file.")
 		return
 	}
 
 	data, err := io.ReadAll(res.Body)
 	res.Body.Close()
 	if err != nil {
-		log.Printf("[ERROR] Failed to read the version file -> %v", err)
-		versionChan <- ""
+		log.Error().Err(err).Msg("Failed to read the version file.")
 		return
 	}
 	gitHubVersion := string(data)
@@ -59,12 +56,18 @@ func CheckNewerVersion(versionChan chan string) {
 
 	greater, err := version.GreaterThen(gitHubVersion, kubeshark.Ver)
 	if err != nil {
-		log.Printf("[ERROR] Ver version is not valid, github version %v, current version %v", gitHubVersion, kubeshark.Ver)
-		versionChan <- ""
+		log.Error().
+			Str("upstream-version", gitHubVersion).
+			Str("local-version", kubeshark.Ver).
+			Msg("Version is invalid!")
 		return
 	}
 
-	log.Printf("Finished version validation, github version %v, current version %v, took %v", gitHubVersion, kubeshark.Ver, time.Since(start))
+	log.Debug().
+		Str("upstream-version", gitHubVersion).
+		Str("local-version", kubeshark.Ver).
+		Dur("elapsed-time", time.Since(start)).
+		Msg("Finished version validation.")
 
 	if greater {
 		var downloadCommand string
@@ -73,8 +76,7 @@ func CheckNewerVersion(versionChan chan string) {
 		} else {
 			downloadCommand = "sh <(curl -Ls https://kubeshark.co/install)"
 		}
-		versionChan <- fmt.Sprintf("Update available! %v -> %v run the command: %s", kubeshark.Ver, gitHubVersion, downloadCommand)
-	} else {
-		versionChan <- ""
+		msg := fmt.Sprintf("Update available! %v -> %v run:", kubeshark.Ver, gitHubVersion)
+		log.Info().Str("command", downloadCommand).Msg(fmt.Sprintf(utils.Yellow, msg))
 	}
 }

resources/cleanResources.go

@@ -3,16 +3,16 @@ package resources
 import (
 	"context"
 	"fmt"
-	"log"
 
 	"github.com/kubeshark/kubeshark/errormessage"
 	"github.com/kubeshark/kubeshark/kubernetes"
 	"github.com/kubeshark/kubeshark/utils"
+	"github.com/rs/zerolog/log"
 	"k8s.io/apimachinery/pkg/util/wait"
 )
 
 func CleanUpKubesharkResources(ctx context.Context, cancel context.CancelFunc, kubernetesProvider *kubernetes.Provider, isNsRestrictedMode bool, kubesharkResourcesNamespace string) {
-	log.Printf("\nRemoving kubeshark resources")
+	log.Info().Msg("Removing Kubeshark resources...")
 
 	var leftoverResources []string
 
@@ -27,7 +27,7 @@ func CleanUpKubesharkResources(ctx context.Context, cancel context.CancelFunc, k
 		for _, resource := range leftoverResources {
 			errMsg += "\n- " + resource
 		}
-		log.Printf(utils.Error, errMsg)
+		log.Error().Msg(fmt.Sprintf(utils.Error, errMsg))
 	}
 }
 
@@ -78,10 +78,18 @@ func waitUntilNamespaceDeleted(ctx context.Context, cancel context.CancelFunc, k
 		switch {
 		case ctx.Err() == context.Canceled:
 			log.Printf("Do nothing. User interrupted the wait")
+			log.Warn().
+				Str("namespace", kubesharkResourcesNamespace).
+				Msg("Did nothing. User interrupted the wait.")
 		case err == wait.ErrWaitTimeout:
-			log.Printf(utils.Error, fmt.Sprintf("Timeout while removing Namespace %s", kubesharkResourcesNamespace))
+			log.Warn().
+				Str("namespace", kubesharkResourcesNamespace).
+				Msg("Timed out while deleting the namespace.")
 		default:
-			log.Printf(utils.Error, fmt.Sprintf("Error while waiting for Namespace %s to be deleted: %v", kubesharkResourcesNamespace, errormessage.FormatError(err)))
+			log.Warn().
+				Err(errormessage.FormatError(err)).
+				Str("namespace", kubesharkResourcesNamespace).
+				Msg("Unknown error while deleting the namespace.")
 		}
 	}
 }
@@ -149,6 +157,6 @@ func cleanUpRestrictedMode(ctx context.Context, kubernetesProvider *kubernetes.P
 }
 
 func handleDeletionError(err error, resourceDesc string, leftoverResources *[]string) {
-	log.Printf("Error removing %s: %v", resourceDesc, errormessage.FormatError(err))
+	log.Warn().Err(errormessage.FormatError(err)).Msg(fmt.Sprintf("Error while removing %s", resourceDesc))
 	*leftoverResources = append(*leftoverResources, resourceDesc)
 }

resources/createResources.go

@@ -2,20 +2,18 @@ package resources
 
 import (
 	"context"
-	"fmt"
-	"log"
 
 	"github.com/kubeshark/kubeshark/config"
 	"github.com/kubeshark/kubeshark/errormessage"
 	"github.com/kubeshark/kubeshark/kubernetes"
 	"github.com/kubeshark/kubeshark/kubeshark"
-	"github.com/kubeshark/kubeshark/utils"
 	"github.com/kubeshark/worker/models"
-	"github.com/op/go-logging"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	core "k8s.io/api/core/v1"
 )
 
-func CreateTapKubesharkResources(ctx context.Context, kubernetesProvider *kubernetes.Provider, serializedKubesharkConfig string, isNsRestrictedMode bool, kubesharkResourcesNamespace string, maxEntriesDBSizeBytes int64, hubResources models.Resources, imagePullPolicy core.PullPolicy, logLevel logging.Level, profiler bool) (bool, error) {
+func CreateTapKubesharkResources(ctx context.Context, kubernetesProvider *kubernetes.Provider, serializedKubesharkConfig string, isNsRestrictedMode bool, kubesharkResourcesNamespace string, maxEntriesDBSizeBytes int64, hubResources models.Resources, imagePullPolicy core.PullPolicy, logLevel zerolog.Level, profiler bool) (bool, error) {
 	if !isNsRestrictedMode {
 		if err := createKubesharkNamespace(ctx, kubernetesProvider, kubesharkResourcesNamespace); err != nil {
 			return false, err
@@ -28,7 +26,7 @@ func CreateTapKubesharkResources(ctx context.Context, kubernetesProvider *kubern
 
 	kubesharkServiceAccountExists, err := createRBACIfNecessary(ctx, kubernetesProvider, isNsRestrictedMode, kubesharkResourcesNamespace, []string{"pods", "services", "endpoints"})
 	if err != nil {
-		log.Printf(utils.Warning, fmt.Sprintf("Failed to ensure the resources required for IP resolving. Kubeshark will not resolve target IPs to names. error: %v", errormessage.FormatError(err)))
+		log.Warn().Err(errormessage.FormatError(err)).Msg("Failed to ensure the resources required for IP resolving. Kubeshark will not resolve target IPs to names.")
 	}
 
 	var serviceAccountName string
@@ -81,14 +79,14 @@ func CreateTapKubesharkResources(ctx context.Context, kubernetesProvider *kubern
 		return kubesharkServiceAccountExists, err
 	}
 
-	log.Printf("Successfully created service: %s", kubernetes.HubServiceName)
+	log.Info().Str("service-name", kubernetes.HubServiceName).Msg("Successfully created service:")
 
 	_, err = kubernetesProvider.CreateService(ctx, kubesharkResourcesNamespace, kubernetes.FrontServiceName, kubernetes.FrontServiceName, 80, int32(config.Config.Front.PortForward.DstPort), int32(config.Config.Front.PortForward.SrcPort))
 	if err != nil {
 		return kubesharkServiceAccountExists, err
 	}
 
-	log.Printf("Successfully created service: %s", kubernetes.FrontServiceName)
+	log.Info().Str("service-name", kubernetes.FrontServiceName).Msg("Successfully created service:")
 
 	return kubesharkServiceAccountExists, nil
 }
@@ -125,7 +123,7 @@ func createKubesharkHubPod(ctx context.Context, kubernetesProvider *kubernetes.P
 	if _, err = kubernetesProvider.CreatePod(ctx, opts.Namespace, pod); err != nil {
 		return err
 	}
-	log.Printf("Successfully created pod: [%s]", pod.Name)
+	log.Info().Str("pod-name", pod.Name).Msg("Successfully created pod.")
 	return nil
 }
 
@@ -137,6 +135,6 @@ func createFrontPod(ctx context.Context, kubernetesProvider *kubernetes.Provider
 	if _, err = kubernetesProvider.CreatePod(ctx, opts.Namespace, pod); err != nil {
 		return err
 	}
-	log.Printf("Successfully created pod: [%s]", pod.Name)
+	log.Info().Str("pod-name", pod.Name).Msg("Successfully created pod.")
 	return nil
 }

utils/browser.go

@@ -2,9 +2,10 @@ package utils
 
 import (
 	"fmt"
-	"log"
 	"os/exec"
 	"runtime"
+
+	"github.com/rs/zerolog/log"
 )
 
 func OpenBrowser(url string) {
@@ -22,6 +23,6 @@ func OpenBrowser(url string) {
 	}
 
 	if err != nil {
-		log.Printf("error while opening browser, %v", err)
+		log.Error().Err(err).Msg("While trying to open a browser")
 	}
 }

utils/wait.go

@@ -2,24 +2,25 @@ package utils
 
 import (
 	"context"
-	"log"
 	"os"
 	"os/signal"
 	"syscall"
+
+	"github.com/rs/zerolog/log"
 )
 
 func WaitForFinish(ctx context.Context, cancel context.CancelFunc) {
-	log.Printf("waiting for finish...")
+	log.Debug().Msg("Waiting to finish...")
 	sigChan := make(chan os.Signal, 1)
 	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
 
 	// block until ctx cancel is called or termination signal is received
 	select {
 	case <-ctx.Done():
-		log.Printf("ctx done")
+		log.Debug().Msg("Context done.")
 		break
 	case <-sigChan:
-		log.Printf("Got termination signal, canceling execution...")
+		log.Debug().Msg("Got a termination signal, canceling execution...")
 		cancel()
 	}
 }