Update public_routes.go, fetchRunner.go, and 3 more files...

cli/kubernetes/portForward.go

@@ -1,52 +0,0 @@
-package kubernetes
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"k8s.io/apimachinery/pkg/util/httpstream"
-	"k8s.io/client-go/tools/portforward"
-	"k8s.io/client-go/transport/spdy"
-	"net/http"
-	"net/url"
-	"strings"
-)
-
-type PortForward struct {
-	stopChan chan struct{}
-}
-
-func NewPortForward(kubernetesProvider *Provider, namespace string, podName string, localPort uint16, podPort uint16, cancel context.CancelFunc) (*PortForward, error) {
-	dialer := getHttpDialer(kubernetesProvider, namespace, podName)
-	stopChan, readyChan := make(chan struct{}, 1), make(chan struct{}, 1)
-	out, errOut := new(bytes.Buffer), new(bytes.Buffer)
-
-	forwarder, err := portforward.New(dialer, []string{fmt.Sprintf("%d:%d", localPort, podPort)}, stopChan, readyChan, out, errOut)
-	if err != nil {
-		return nil, err
-	}
-	go func() {
-		err = forwarder.ForwardPorts() // this is blocking
-		if err != nil {
-			fmt.Printf("kubernetes port-forwarding error: %s", err)
-			cancel()
-		}
-	}()
-	return &PortForward{stopChan: stopChan}, nil
-}
-
-func (portForward *PortForward) Stop() {
-	close(portForward.stopChan)
-}
-
-func getHttpDialer(kubernetesProvider *Provider, namespace string, podName string) httpstream.Dialer {
-	roundTripper, upgrader, err := spdy.RoundTripperFor(&kubernetesProvider.clientConfig)
-	if err != nil {
-		panic(err)
-	}
-	path := fmt.Sprintf("/api/v1/namespaces/%s/pods/%s/portforward", namespace, podName)
-	hostIP := strings.TrimLeft(kubernetesProvider.clientConfig.Host, "htps:/")
-	serverURL := url.URL{Scheme: "https", Path: path, Host: hostIP}
-
-	return spdy.NewDialer(upgrader, &http.Client{Transport: roundTripper}, http.MethodPost, &serverURL)
-}

cli/kubernetes/proxy.go

@@ -1,14 +1,17 @@
 package kubernetes
 
 import (
-	"context"
 	"fmt"
 	"k8s.io/kubectl/pkg/proxy"
+	"net"
+	"net/http"
+	"net/url"
 	"time"
 )
 
-func StartProxy(ctx context.Context, kubernetesProvider *Provider, mizuPort uint16, mizuNamespace string, mizuServiceName string) error {
-	//o := cmdProxy.NewProxyOptions(genericclioptions.IOStreams{In: os.Stdin, Out: os.Stdout, ErrOut: os.Stderr})
+const k8sProxyApiPrefix = "/"
+
+func StartProxy(kubernetesProvider *Provider, mizuPort uint16, mizuNamespace string, mizuServiceName string) error {
 	filter := &proxy.FilterServer{
 		AcceptPaths:   proxy.MakeRegexpArrayOrDie(proxy.DefaultPathAcceptRE),
 		RejectPaths:   proxy.MakeRegexpArrayOrDie(proxy.DefaultPathRejectRE),
@@ -16,26 +19,37 @@ func StartProxy(ctx context.Context, kubernetesProvider *Provider, mizuPort uint
 		RejectMethods: proxy.MakeRegexpArrayOrDie(proxy.DefaultMethodRejectRE),
 	}
 
-	server, err := proxy.NewServer("", "/", "/static/", filter, &kubernetesProvider.clientConfig, time.Second * 1)
+	mizuProxiedUrl := GetMizuCollectorProxiesHostAndPath(mizuPort, mizuNamespace, mizuServiceName)
+	proxyHandler, err := proxy.NewProxyHandler(k8sProxyApiPrefix, filter, &kubernetesProvider.clientConfig, time.Second * 2)
+	if err != nil {
+		return err
+	}
+	mux := http.NewServeMux()
+	mux.Handle(k8sProxyApiPrefix, proxyHandler)
+	//work around to make static resources available to the dashboard (all .svgs will not load without this)
+	mux.Handle("/static/", getRerouteHttpHandler(proxyHandler, mizuProxiedUrl))
 
-	l, err := server.Listen("127.0.0.1", int(mizuPort))
+	//l, err := server.Listen("127.0.0.1", int(mizuPort))
+	l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", "127.0.0.1", int(mizuPort)))
 	if err != nil {
 		return err
 	}
 
-	go func() {
-		for {
-			select {
-			case <-ctx.Done():
-				fmt.Printf("Closing connection due to context done")
-				err := l.Close()
-				if err != nil {
-					fmt.Printf("Error stopping proxy network handler %v", err)
-				}
-				return
-			}
-		}
-	}()
-	fmt.Printf("Mizu is available at  http://localhost:%d/api/v1/namespaces/%s/services/%s:80/proxy\n", mizuPort, mizuNamespace, mizuServiceName)
-	return server.ServeOnListener(l)
+	server := http.Server{
+		Handler: mux,
+	}
+	return server.Serve(l)
+}
+
+func GetMizuCollectorProxiesHostAndPath(mizuPort uint16, mizuNamespace string, mizuServiceName string) string {
+	return fmt.Sprintf("localhost:%d/api/v1/namespaces/%s/services/%s:80/proxy", mizuPort, mizuNamespace, mizuServiceName)
+}
+
+// rewrites requests so they end up reaching the mizu-collector k8s service via the k8s proxy handler
+func getRerouteHttpHandler(proxyHandler http.Handler, mizuProxyUrl string) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		newUrl, _ := url.Parse(fmt.Sprintf("http://%s%s", mizuProxyUrl, r.URL.Path))
+		r.URL = newUrl
+		proxyHandler.ServeHTTP(w, r)
+	})
 }