add kubectl api

pkg/apis/v1alpha/install.go

@@ -19,6 +19,8 @@ package v1alpha
 import (
         "github.com/emicklei/go-restful"
         "kubesphere.io/kubesphere/pkg/apis/v1alpha/nodes"
+        "kubesphere.io/kubesphere/pkg/apis/v1alpha/kubeconfig"
+        "kubesphere.io/kubesphere/pkg/apis/v1alpha/kubectl"
 )
 
 func init() {
@@ -27,8 +29,11 @@ func init() {
         ws.Path("/api/v1alpha")
 
         nodes.Register(ws,"/nodes")
+        kubeconfig.Register(ws, "/namespaces/{namespace}/kubeconfig")
+        kubectl.Register(ws, "/namespaces/{namespace}/kubectl")
 
         // add webservice to default container
         restful.Add(ws)
 
 }
+

pkg/apis/v1alpha/kubectl/kubectl.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2018 The KubeSphere 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 kubectl
+
+import (
+	"github.com/emicklei/go-restful"
+	"kubesphere.io/kubesphere/pkg/models"
+	"net/http"
+)
+
+func Register(ws *restful.WebService, subPath string) {
+
+	ws.Route(ws.GET(subPath).Consumes("*/*").Produces(restful.MIME_JSON).To(handleKubectl).Doc("use to " +
+		"get a kubectl pod in specified namespaces").Param(ws.PathParameter("namespace",
+		"namespace").DataType("string")).Do(returns200,returns500))
+
+}
+
+func handleKubectl(req *restful.Request, resp *restful.Response) {
+
+	ns := req.PathParameter("namespace")
+
+	kubectlPod, err := models.GetKubectlPod(ns)
+
+	if err != nil {
+		resp.WriteError(http.StatusInternalServerError, err)
+	}
+
+	resp.WriteEntity(kubectlPod)
+}
+
+func returns200(b *restful.RouteBuilder) {
+	b.Returns(http.StatusOK, "OK", nil)
+}
+
+func returns500(b *restful.RouteBuilder) {
+	b.Returns(http.StatusInternalServerError, "fail", nil)
+}

pkg/models/kubectl.go

@@ -0,0 +1,86 @@
+/*
+Copyright 2018 The KubeSphere 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 models
+
+import (
+	"fmt"
+	"math/rand"
+	meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"kubesphere.io/kubesphere/pkg/client"
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+)
+
+
+const (
+	deploymentName = "kubectl"
+)
+
+type kubectlPodInfo struct {
+	Namespace string `json: "namespace"`
+	Pod string `json: "podname"`
+	Container string `json: "container"`
+}
+
+func GetKubectlPod(namespace string) (kubectlPodInfo, error) {
+	k8sClient := client.NewK8sClient()
+	deploy, err := k8sClient.AppsV1beta2().Deployments(namespace).Get(deploymentName, meta_v1.GetOptions{})
+	if err != nil {
+		glog.Errorln(err)
+		return kubectlPodInfo{}, err
+	}
+
+	selectors := deploy.Spec.Selector.MatchLabels
+	labelSelector := labels.Set(selectors).AsSelector().String()
+	podList, err := k8sClient.CoreV1().Pods(namespace).List(meta_v1.ListOptions{LabelSelector:labelSelector})
+	if err != nil {
+		glog.Errorln(err)
+		return kubectlPodInfo{}, err
+	}
+
+	pod, err := selectCorrectPod(namespace, podList.Items)
+	if err != nil{
+		glog.Errorln(err)
+		return kubectlPodInfo{}, err
+	}
+
+	info := kubectlPodInfo{Namespace:pod.Namespace, Pod:pod.Name, Container:pod.Status.ContainerStatuses[0].Name}
+
+	return info, nil
+
+}
+
+
+func selectCorrectPod(namespace string, pods []v1.Pod) (kubectlPod v1.Pod, err error) {
+
+	var kubectPodList []v1.Pod
+	for _, pod := range pods{
+		for _, condition := range pod.Status.Conditions{
+			if condition.Type == "Ready" && condition.Status == "True"{
+				kubectPodList = append(kubectPodList, pod)
+			}
+		}
+	}
+	if len(kubectPodList) < 1{
+		err = fmt.Errorf("cannot find valid kubectl pod in namespace:%s", namespace)
+		return v1.Pod{}, err
+	}
+
+	random := rand.Intn(len(kubectPodList))
+	return kubectPodList[random], nil
+}