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https://github.com/kubeshark/kubeshark.git
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@@ -1,138 +0,0 @@
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package mizu
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import (
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"context"
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"fmt"
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"github.com/up9inc/mizu/cli/config"
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"github.com/up9inc/mizu/cli/kubernetes"
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"os"
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"os/signal"
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"regexp"
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"syscall"
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"time"
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)
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func Run(tappedPodName string) {
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kubernetesProvider := kubernetes.NewProvider(config.Configuration.KubeConfigPath, config.Configuration.Namespace)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel() // cancel will be called when this function exits
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podName := "mizu-collector"
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mizuServiceAccountExists := createRBACIfNecessary(ctx, kubernetesProvider)
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go createPodAndPortForward(ctx, kubernetesProvider, cancel, podName, MizuResourcesNamespace, tappedPodName, mizuServiceAccountExists) //TODO convert this to job for built in pod ttl or have the running app handle this
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waitForFinish(ctx, cancel) //block until exit signal or error
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// TODO handle incoming traffic from tapper using a channel
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//cleanup
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fmt.Printf("\nremoving pod %s\n", podName)
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removalCtx, _ := context.WithTimeout(context.Background(), 2 * time.Second)
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kubernetesProvider.RemovePod(removalCtx, MizuResourcesNamespace, podName)
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}
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func watchPodsForTapping(ctx context.Context, kubernetesProvider *kubernetes.Provider, cancel context.CancelFunc, podRegex *regexp.Regexp) {
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added, modified, removed, errorChan := kubernetes.FilteredWatch(ctx, kubernetesProvider.GetPodWatcher(ctx, kubernetesProvider.Namespace), podRegex)
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for {
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select {
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case newTarget := <- added:
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fmt.Printf("+%s\n", newTarget.Name)
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case removedTarget := <- removed:
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fmt.Printf("-%s\n", removedTarget.Name)
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case <- modified:
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continue
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case <- errorChan:
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cancel()
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case <- ctx.Done():
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return
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}
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}
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}
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func createPodAndPortForward(ctx context.Context, kubernetesProvider *kubernetes.Provider, cancel context.CancelFunc, podName string, namespace string, tappedPodName string, linkServiceAccount bool) {
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pod, err := kubernetesProvider.CreateMizuPod(ctx, MizuResourcesNamespace, podName, config.Configuration.MizuImage, kubernetesProvider.Namespace, tappedPodName, linkServiceAccount)
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if err != nil {
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fmt.Printf("error creating pod %s", err)
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cancel()
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return
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}
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podExactRegex := regexp.MustCompile(fmt.Sprintf("^%s$", pod.Name))
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added, modified, removed, errorChan := kubernetes.FilteredWatch(ctx, kubernetesProvider.GetPodWatcher(ctx, namespace), podExactRegex)
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isPodReady := false
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var portForward *kubernetes.PortForward
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for {
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select {
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case <- added:
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continue
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case <- removed:
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fmt.Printf("%s removed\n", podName)
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cancel()
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return
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case modifiedPod := <- modified:
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if modifiedPod.Status.Phase == "Running" && !isPodReady {
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isPodReady = true
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var err error
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portForward, err = kubernetes.NewPortForward(kubernetesProvider, namespace, podName, config.Configuration.GuiPort, config.Configuration.MizuPodPort, cancel)
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fmt.Printf("Web interface is now available at http://localhost:%d\n", config.Configuration.GuiPort)
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if err != nil {
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fmt.Printf("error forwarding port to pod %s\n", err)
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cancel()
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}
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}
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case <- time.After(25 * time.Second):
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if !isPodReady {
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fmt.Printf("error: %s pod was not ready in time", podName)
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cancel()
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}
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case <- errorChan:
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cancel()
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case <- ctx.Done():
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if portForward != nil {
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portForward.Stop()
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}
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return
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}
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}
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}
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func createRBACIfNecessary(ctx context.Context, kubernetesProvider *kubernetes.Provider) bool {
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mizuRBACExists, err := kubernetesProvider.DoesMizuRBACExist(ctx, MizuResourcesNamespace)
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if err != nil {
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fmt.Printf("warning: could not ensure mizu rbac resources exist %v\n", err)
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return false
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}
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if !mizuRBACExists {
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var versionString = Version
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if GitCommitHash != "" {
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versionString += "-" + GitCommitHash
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}
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err := kubernetesProvider.CreateMizuRBAC(ctx, MizuResourcesNamespace, versionString)
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if err != nil {
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fmt.Printf("warning: could not create mizu rbac resources %v\n", err)
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return false
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}
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}
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return true
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}
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func waitForFinish(ctx context.Context, cancel context.CancelFunc) {
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sigChan := make(chan os.Signal, 1)
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signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
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// block until ctx cancel is called or termination signal is received
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select {
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case <- ctx.Done():
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break
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case <- sigChan:
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cancel()
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}
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}
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