Improve kubectl plugin

cmd/plugin/commands/info/info.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package info
+
+import (
+	"fmt"
+	"github.com/spf13/cobra"
+
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+
+	"k8s.io/ingress-nginx/cmd/plugin/request"
+	"k8s.io/ingress-nginx/cmd/plugin/util"
+)
+
+// CreateCommand creates and returns this cobra subcommand
+func CreateCommand(flags *genericclioptions.ConfigFlags) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "info",
+		Short: "Show information about the ingress-nginx service",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			service, err := cmd.Flags().GetString("service")
+			if err != nil {
+				return err
+			}
+
+			util.PrintError(info(flags, service))
+			return nil
+		},
+	}
+
+	cmd.Flags().String("service", util.DefaultIngressServiceName, "The name of the ingress-nginx service")
+	return cmd
+}
+
+func info(flags *genericclioptions.ConfigFlags, serviceName string) error {
+	service, err := request.GetServiceByName(flags, serviceName, nil)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Service cluster IP address: %v\n", service.Spec.ClusterIP)
+	fmt.Printf("LoadBalancer IP|CNAME: %v\n", service.Spec.LoadBalancerIP)
+	return nil
+}