create app
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parent
ab30afbce0
commit
ef982d7a05
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@ -1,5 +1,11 @@
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package k8s_manager
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import (
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"fmt"
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v1 "k8s.io/api/core/v1"
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"strings"
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)
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type AppModel struct {
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Id int
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AppName string
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@ -39,3 +45,51 @@ func (a *AppModel) Delete() error {
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db.Delete(a, a.Id)
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return nil
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}
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func (a *AppModel) NamePrefix() string {
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return fmt.Sprintf("%s-%s", a.UserName, a.AppName)
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}
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func (a *AppModel) PodName() string {
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return fmt.Sprintf("%s-pod", a.NamePrefix())
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}
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func (a *AppModel) ContainerName() string {
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return fmt.Sprintf("%s-container", a.NamePrefix())
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}
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func (a *AppModel) ServiceName() string {
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return fmt.Sprintf("%s-service", a.NamePrefix())
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}
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func (a *AppModel) DeploymentName() string {
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return fmt.Sprintf("%s-deployment", a.NamePrefix())
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}
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func (a *AppModel) GetCommandOrBlack() []string {
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if strings.TrimSpace(a.Command) != "" {
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return []string{"bash", "-c", a.Command}
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} else {
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return nil
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}
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}
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func (a *AppModel) GetLabel() (string, string) {
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return "cg-label", fmt.Sprintf("%s-label", a.NamePrefix())
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}
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func (a *AppModel) GetEnv() []v1.EnvVar {
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if strings.TrimSpace(a.Env) == "" {
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return nil
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}
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sep1 := strings.Split(a.Env, " ")
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ans := make([]v1.EnvVar, len(sep1))
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for i, v := range sep1 {
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kv := strings.SplitN(v, "=", 2)
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ans[i].Name = kv[0]
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if len(kv) == 2 {
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ans[i].Value = kv[1]
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}
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}
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return ans
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}
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@ -4,116 +4,90 @@ import (
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"context"
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"fmt"
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log "github.com/sirupsen/logrus"
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appv1 "k8s.io/api/apps/v1"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/api/apps/v1beta1"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"time"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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"strings"
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"sync"
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)
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func ListPods() {
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type K8sClient struct {
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*kubernetes.Clientset
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Namespace string
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}
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func InitClient() *K8sClient {
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var err error
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config, err := rest.InClusterConfig()
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if err != nil {
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log.WithError(err).Error("InClusterConfig")
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return
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return nil
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}
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client, err := kubernetes.NewForConfig(config)
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if err != nil {
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log.WithError(err).Error("NewForConfig")
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}
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for {
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pods, err := client.CoreV1().Pods("").List(context.Background(), metav1.ListOptions{})
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if err != nil {
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fmt.Println(err)
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} else {
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fmt.Printf("There are %d pods in the cluster\n", len(pods.Items))
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}
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time.Sleep(10 * time.Second)
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return &K8sClient{client, "apps"}
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}
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func (c *K8sClient) ListPods() {
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pods, err := c.CoreV1().Pods("").List(context.Background(), metav1.ListOptions{})
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if err != nil {
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log.WithError(err).Error("ListPods")
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} else {
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fmt.Printf("There are %d pods in the cluster\n", len(pods.Items))
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}
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}
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func fake_main() {
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wg := sync.WaitGroup{}
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config, err := rest.InClusterConfig()
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func (c *K8sClient) CreateApp(app *AppModel) {
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clientSet, err := kubernetes.NewForConfig(config)
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if err != nil {
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log.Println(err)
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return
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}
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//开启一个集群监听
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go func() {
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wg.Add(1)
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defer wg.Done()
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watcher, err := clientSet.CoreV1().Events("default").Watch(context.Background(), metav1.ListOptions{})
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if err != nil {
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log.Println(err)
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return
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}
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eventChan := watcher.ResultChan()
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for {
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event := <-eventChan
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log.Println(event.Type)
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}
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}()
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//一个简单的例子：创建一个 deployment，启动3个 busybox 副本
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container := corev1.Container{
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Name: "busybox",
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Image: "busybox:latest",
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Command: []string{"top"}, //这里直接执行top命令来避免容器退出
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}
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podSpec := corev1.PodSpec{
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Containers: []corev1.Container{container},
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}
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podTemplateSpec := corev1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{Labels: map[string]string{"dev": "busybox"}},
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Spec: podSpec,
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}
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spec := appv1.DeploymentSpec{
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Selector: &metav1.LabelSelector{
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MatchLabels: map[string]string{
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"dev": "busybox",
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var rep int32 = 1
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labelKey, labelValue := app.GetLabel()
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labels := map[string]string{labelKey: labelValue}
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deployment := &v1beta1.Deployment{
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ObjectMeta: metav1.ObjectMeta{
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Name: app.DeploymentName(),
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Labels: labels,
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},
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Spec: v1beta1.DeploymentSpec{
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Replicas: &rep,
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Selector: &metav1.LabelSelector{
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MatchLabels: labels,
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},
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Template: v1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: labels,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{{
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Name: app.ContainerName(),
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Image: app.Image,
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Command: app.GetCommandOrBlack(),
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Env: app.GetEnv(),
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VolumeMounts: nil,
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}},
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},
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},
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},
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Replicas: Int32Value(3),
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Template: podTemplateSpec,
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}
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deployment := appv1.Deployment{
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ObjectMeta: metav1.ObjectMeta{
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Name: "busybox-test",
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},
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Spec: spec,
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}
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resultDeployment, err := clientSet.AppsV1().Deployments("default").Get(context.Background(), "busybox-test", metav1.GetOptions{})
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deployment, err := c.AppsV1beta1().Deployments(c.Namespace).Create(context.Background(), deployment, metav1.CreateOptions{})
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if err != nil {
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if strings.Contains(err.Error(), "not found") {
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resultDeployment, err = clientSet.AppsV1().Deployments("default").Create(context.Background(), &deployment, metav1.CreateOptions{})
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if err != nil {
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log.Println(err)
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return
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}
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}
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return
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} else {
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resultDeployment, err = clientSet.AppsV1().Deployments("default").Update(context.Background(), &deployment, metav1.UpdateOptions{})
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if err != nil {
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log.Println(err)
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return
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}
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log.WithError(err).Error("Create Deployment error.")
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}
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log.Println(resultDeployment.Name)
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wg.Wait()
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}
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service := &v1.Service{
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ObjectMeta: metav1.ObjectMeta{
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Name: app.ServiceName(),
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},
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Spec: v1.ServiceSpec{
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Type: v1.ServiceTypeClusterIP,
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Selector: labels,
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},
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}
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func Int32Value(a int32) *int32 {
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return &a
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service, err = c.CoreV1().Services(c.Namespace).Create(context.Background(), service, metav1.CreateOptions{})
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if err != nil {
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log.WithError(err).Error("Create Service ")
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}
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}
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