From c5842e766838edbe2ba63d2993e30d22073c827b Mon Sep 17 00:00:00 2001
From: guoxudong <guoxudong@keking.cn>
Date: Thu, 8 Aug 2019 18:14:47 +0800
Subject: [PATCH] add config check & show

---
 cmd/get.go |  1 +
 cmd/use.go | 26 ++++++++++++++++++++++++++
 go.mod     |  1 +
 go.sum     |  3 +++
 4 files changed, 31 insertions(+)

diff --git a/cmd/get.go b/cmd/get.go
index b05d56f5..d7d8ebae 100644
--- a/cmd/get.go
+++ b/cmd/get.go
@@ -48,6 +48,7 @@ var getCmd = &cobra.Command{
 				os.Exit(1)
 			}
 		}
+		ClusterStatus()
 	},
 }
 
diff --git a/cmd/use.go b/cmd/use.go
index 7ac6fe5b..734a11a4 100644
--- a/cmd/use.go
+++ b/cmd/use.go
@@ -17,6 +17,9 @@ package cmd
 
 import (
 	"fmt"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -55,6 +58,7 @@ Sets the current-context in a kubeconfig file
 		} else {
 			fmt.Println("Please input a CONTEXT_NAME.")
 		}
+		ClusterStatus()
 	},
 }
 
@@ -71,3 +75,25 @@ func (c *Config) CheckContext(name string) bool {
 	}
 	return false
 }
+
+func ClusterStatus() {
+	config, err := clientcmd.BuildConfigFromFlags("", cfgFile)
+	if err != nil {
+		panic(err.Error())
+	}
+
+	clientset, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		panic(err.Error())
+	}
+
+	cus, err := clientset.CoreV1().ComponentStatuses().List(metav1.ListOptions{})
+	if err != nil {
+		panic(err.Error())
+	}
+	var names []string
+	for _, k := range cus.Items {
+		names = append(names, k.Name)
+	}
+	fmt.Printf("Cluster check succeeded!\nContains components: %v \n", names)
+}
diff --git a/go.mod b/go.mod
index 2534ebc8..24d65127 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.12
 require (
 	github.com/bndr/gotabulate v1.1.2
 	github.com/gogo/protobuf v1.2.1 // indirect
+	github.com/googleapis/gnostic v0.3.0 // indirect
 	github.com/imdario/mergo v0.3.7 // indirect
 	github.com/json-iterator/go v1.1.7 // indirect
 	github.com/mitchellh/go-homedir v1.1.0
diff --git a/go.sum b/go.sum
index b2d6b55c..8a205542 100644
--- a/go.sum
+++ b/go.sum
@@ -40,6 +40,8 @@ github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/googleapis/gnostic v0.0.0-20170426233943-68f4ded48ba9/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTVRp3pOg5EKY=
 github.com/googleapis/gnostic v0.0.0-20170729233727-0c5108395e2d/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTVRp3pOg5EKY=
+github.com/googleapis/gnostic v0.3.0 h1:CcQijm0XKekKjP/YCz28LXVSpgguuB+nCxaSjCe09y0=
+github.com/googleapis/gnostic v0.3.0/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTVRp3pOg5EKY=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
@@ -153,6 +155,7 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWD
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+k8s.io/api v0.0.0-20190313235455-40a48860b5ab h1:DG9A67baNpoeweOy2spF1OWHhnVY5KR7/Ek/+U1lVZc=
 k8s.io/api v0.0.0-20190313235455-40a48860b5ab/go.mod h1:iuAfoD4hCxJ8Onx9kaTIt30j7jUFS00AXQi6QMi99vA=
 k8s.io/api v0.0.0-20190803060717-3ce214556aa9/go.mod h1:SgXHCRh94q+5GrRf9Dty2ZG8+wCVmqvQbZJXXcAswkw=
 k8s.io/api v0.0.0-20190806064354-8b51d7113622 h1:/ukNCVAmzoFiS9couF8B08fY4Y5s0LR5e5e6lyEQAFE=