Merge pull request #66 from up9inc/mizu_view

TRA-3235 Implementation of Mizu view command

cli/cmd/view.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"fmt"
 	"github.com/spf13/cobra"
 )
 
@@ -9,7 +8,7 @@ var viewCmd = &cobra.Command{
 	Use:   "view",
 	Short: "Open GUI in browser",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		fmt.Println("Not implemented")
+		runMizuView()
 		return nil
 	},
 }

cli/cmd/viewRunner.go

@@ -0,0 +1,33 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"github.com/up9inc/mizu/cli/kubernetes"
+	"github.com/up9inc/mizu/cli/mizu"
+	"net/http"
+)
+
+func runMizuView() {
+	kubernetesProvider := kubernetes.NewProvider("", "")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	exists, err := kubernetesProvider.DoesServicesExist(ctx, mizu.ResourcesNamespace, mizu.AggregatorPodName)
+	if err != nil {
+		panic(err)
+	}
+	if !exists {
+		fmt.Printf("The %s service not found\n", mizu.AggregatorPodName)
+		return
+	}
+
+	_, err = http.Get("http://localhost:8899/")
+	if err == nil {
+		fmt.Printf("Found a running service %s and open port 8899\n", mizu.AggregatorPodName)
+		return
+	}
+	fmt.Printf("Found service %s, creating port forwarding to 8899\n", mizu.AggregatorPodName)
+	portForwardApiPod(ctx, kubernetesProvider, cancel, &MizuTapOptions{GuiPort: 8899, MizuPodPort: 8899})
+}

cli/kubernetes/provider.go

@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-
 	"path/filepath"
 	"regexp"
 
@@ -159,6 +158,21 @@ func (provider *Provider) DoesMizuRBACExist(ctx context.Context, namespace strin
 	return serviceAccount != nil, nil
 }
 
+func (provider *Provider) DoesServicesExist(ctx context.Context, namespace string, serviceName string) (bool, error) {
+	service, err := provider.clientSet.CoreV1().Services(namespace).Get(ctx, serviceName, metav1.GetOptions{})
+
+	var statusError *k8serrors.StatusError
+	if errors.As(err, &statusError) {
+		if statusError.ErrStatus.Reason == metav1.StatusReasonNotFound {
+			return false, nil
+		}
+	}
+	if err != nil {
+		return false, err
+	}
+	return service != nil, nil
+}
+
 func (provider *Provider) CreateMizuRBAC(ctx context.Context, namespace string, version string) error {
 	clusterRoleName := "mizu-cluster-role"