Initial commit

pkg/models/kubectl/kubectl.go

@@ -0,0 +1,156 @@
+/*
+
+ Copyright 2019 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 (
+	"fmt"
+	"math/rand"
+
+	"github.com/golang/glog"
+	"k8s.io/api/apps/v1beta2"
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+
+	"k8s.io/apimachinery/pkg/api/errors"
+
+	"kubesphere.io/kubesphere/pkg/client"
+	"kubesphere.io/kubesphere/pkg/constants"
+)
+
+const (
+	namespace = constants.KubeSphereControlNamespace
+)
+
+type PodInfo struct {
+	Namespace string `json:"namespace"`
+	Pod       string `json:"pod"`
+	Container string `json:"container"`
+}
+
+func GetKubectlPod(username string) (PodInfo, error) {
+	k8sClient := client.K8sClient()
+	deploy, err := k8sClient.AppsV1beta2().Deployments(namespace).Get(username, metav1.GetOptions{})
+	if err != nil {
+		glog.Errorln(err)
+		return PodInfo{}, err
+	}
+
+	selectors := deploy.Spec.Selector.MatchLabels
+	labelSelector := labels.Set(selectors).AsSelector().String()
+	podList, err := k8sClient.CoreV1().Pods(namespace).List(metav1.ListOptions{LabelSelector: labelSelector})
+	if err != nil {
+		glog.Errorln(err)
+		return PodInfo{}, err
+	}
+
+	pod, err := selectCorrectPod(namespace, podList.Items)
+	if err != nil {
+		glog.Errorln(err)
+		return PodInfo{}, err
+	}
+
+	info := PodInfo{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 kubectlPodList []v1.Pod
+	for _, pod := range pods {
+		for _, condition := range pod.Status.Conditions {
+			if condition.Type == "Ready" && condition.Status == "True" {
+				kubectlPodList = append(kubectlPodList, pod)
+			}
+		}
+	}
+	if len(kubectlPodList) < 1 {
+		err = fmt.Errorf("cannot find valid kubectl pod in namespace:%s", namespace)
+		return v1.Pod{}, err
+	}
+
+	random := rand.Intn(len(kubectlPodList))
+	return kubectlPodList[random], nil
+}
+
+func CreateKubectlDeploy(user string) error {
+	k8sClient := client.K8sClient()
+	_, err := k8sClient.AppsV1().Deployments(namespace).Get(user, metav1.GetOptions{})
+	if err == nil {
+		return nil
+	}
+
+	replica := int32(1)
+	selector := metav1.LabelSelector{MatchLabels: map[string]string{"user": user}}
+	config := v1.ConfigMapVolumeSource{Items: []v1.KeyToPath{{Key: "config", Path: "config"}}, LocalObjectReference: v1.LocalObjectReference{Name: user}}
+	deployment := v1beta2.Deployment{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: user,
+		},
+		Spec: v1beta2.DeploymentSpec{
+			Replicas: &replica,
+			Selector: &selector,
+			Template: v1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"user": user,
+					},
+				},
+				Spec: v1.PodSpec{
+					Containers: []v1.Container{
+						{Name: "kubectl",
+							Image:        "",
+							VolumeMounts: []v1.VolumeMount{{Name: "kubeconfig", MountPath: "/root/.kube"}},
+						},
+					},
+					Volumes: []v1.Volume{{Name: "kubeconfig", VolumeSource: v1.VolumeSource{ConfigMap: &config}}},
+				},
+			},
+		},
+	}
+
+	_, err = k8sClient.AppsV1beta2().Deployments(namespace).Create(&deployment)
+
+	return err
+}
+
+func DelKubectlDeploy(user string) error {
+	k8sClient := client.K8sClient()
+	_, err := k8sClient.AppsV1beta2().Deployments(namespace).Get(user, metav1.GetOptions{})
+	if errors.IsNotFound(err) {
+		return nil
+	}
+
+	if err != nil {
+		err := fmt.Errorf("delete user %s failed, reason:%v", user, err)
+		return err
+	}
+
+	deletePolicy := metav1.DeletePropagationBackground
+
+	err = k8sClient.AppsV1beta2().Deployments(namespace).Delete(user, &metav1.DeleteOptions{PropagationPolicy: &deletePolicy})
+	if err != nil {
+		err := fmt.Errorf("delete user %s failed, reason:%v", user, err)
+		return err
+	}
+
+	return nil
+}