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controller.go
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controller.go
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package helm
import (
"context"
"encoding/base64"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"time"
"github.com/rancher/norman/types/slice"
hutils "github.com/rancher/rancher/pkg/controllers/user/helm/utils"
mgmtv3 "github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/apis/project.cattle.io/v3"
"github.com/rancher/types/config"
"github.com/rancher/types/user"
"github.com/sirupsen/logrus"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)
const (
helmTokenPrefix = "helm-token-"
description = "token for helm chart deployment"
)
type KubeConfigGetter interface {
KubeConfig(clusterName, token string) *clientcmdapi.Config
}
func Register(user *config.UserContext, kubeConfigGetter KubeConfigGetter) {
appClient := user.Management.Project.Apps("")
stackLifecycle := &Lifecycle{
KubeConfigGetter: kubeConfigGetter,
TokenClient: user.Management.Management.Tokens(""),
UserClient: user.Management.Management.Users(""),
UserManager: user.Management.UserManager,
K8sClient: user.K8sClient,
TemplateVersionClient: user.Management.Management.TemplateVersions(""),
ListenConfigClient: user.Management.Management.ListenConfigs(""),
ClusterName: user.ClusterName,
}
appClient.AddClusterScopedLifecycle("helm-controller", user.ClusterName, stackLifecycle)
}
type Lifecycle struct {
KubeConfigGetter KubeConfigGetter
UserManager user.Manager
TokenClient mgmtv3.TokenInterface
UserClient mgmtv3.UserInterface
TemplateVersionClient mgmtv3.TemplateVersionInterface
K8sClient kubernetes.Interface
ListenConfigClient mgmtv3.ListenConfigInterface
ClusterName string
}
func (l *Lifecycle) Create(obj *v3.App) (*v3.App, error) {
if obj.Spec.ExternalID == "" {
return obj, nil
}
newObj, err := v3.AppConditionInstalled.DoUntilTrue(obj, func() (runtime.Object, error) {
templateVersionID, err := hutils.ParseExternalID(obj.Spec.ExternalID)
if err != nil {
return obj, err
}
if err := l.Run(obj, "install", templateVersionID); err != nil {
return obj, err
}
configMaps, err := l.K8sClient.CoreV1().ConfigMaps(obj.Spec.InstallNamespace).List(metav1.ListOptions{
LabelSelector: fmt.Sprintf("%s=%s", "NAME", obj.Name),
})
if err != nil {
return obj, err
}
releases := []v3.ReleaseInfo{}
for _, cm := range configMaps.Items {
releaseInfo := v3.ReleaseInfo{}
releaseInfo.Name = cm.Name
releaseInfo.Version = cm.Labels["VERSION"]
releaseInfo.CreateTimestamp = cm.CreationTimestamp.Format(time.RFC3339)
releaseInfo.ModifiedAt = cm.Labels["MODIFIED_AT"]
releaseInfo.TemplateVersionID = templateVersionID
releases = append(releases, releaseInfo)
}
obj.Status.Releases = releases
return obj, nil
})
return newObj.(*v3.App), err
}
func (l *Lifecycle) Updated(obj *v3.App) (*v3.App, error) {
if obj.Spec.ExternalID == "" {
return obj, nil
}
templateVersionID, err := hutils.ParseExternalID(obj.Spec.ExternalID)
if err != nil {
return obj, err
}
templateVersion, err := l.TemplateVersionClient.Get(templateVersionID, metav1.GetOptions{})
if err != nil {
return obj, err
}
if err := l.saveTemplates(obj, templateVersion); err != nil {
return obj, err
}
configMaps, err := l.K8sClient.CoreV1().ConfigMaps(obj.Spec.InstallNamespace).List(metav1.ListOptions{
LabelSelector: fmt.Sprintf("%s=%s", "NAME", obj.Name),
})
if err != nil {
return obj, err
}
releases := obj.Status.Releases
alreadyExistedReleaseNames := []string{}
for _, k := range releases {
alreadyExistedReleaseNames = append(alreadyExistedReleaseNames, k.Name)
}
for _, cm := range configMaps.Items {
if !slice.ContainsString(alreadyExistedReleaseNames, cm.Name) {
logrus.Infof("uploading release %s into namespace %s", cm.Name, obj.Name)
releaseInfo := v3.ReleaseInfo{}
releaseInfo.Name = cm.Name
releaseInfo.Version = cm.Labels["VERSION"]
releaseInfo.CreateTimestamp = cm.CreationTimestamp.Format(time.RFC3339)
releaseInfo.ModifiedAt = cm.Labels["MODIFIED_AT"]
releaseInfo.TemplateVersionID = templateVersionID
releases = append(releases, releaseInfo)
}
}
obj.Status.Releases = releases
return obj, nil
}
func (l *Lifecycle) Remove(obj *v3.App) (*v3.App, error) {
if obj.Spec.ExternalID == "" {
return obj, nil
}
templateVersionID, err := hutils.ParseExternalID(obj.Spec.ExternalID)
if err != nil {
return obj, err
}
if err := l.Run(obj, "delete", templateVersionID); err != nil {
return obj, err
}
return obj, nil
}
func (l *Lifecycle) Run(obj *v3.App, action, templateVersionID string) error {
templateVersion, err := l.TemplateVersionClient.Get(templateVersionID, metav1.GetOptions{})
if err != nil {
return err
}
if err := l.saveTemplates(obj, templateVersion); err != nil {
return err
}
files := map[string]string{}
for _, file := range templateVersion.Spec.Files {
content, err := base64.StdEncoding.DecodeString(file.Contents)
if err != nil {
return err
}
files[file.Name] = string(content)
}
tempDir, err := ioutil.TempDir("", "helm-")
if err != nil {
return err
}
dir, err := hutils.WriteTempDir(tempDir, files)
defer os.RemoveAll(dir)
if err != nil {
return err
}
cont, cancel := context.WithCancel(context.Background())
defer cancel()
addr := hutils.GenerateRandomPort()
probeAddr := hutils.GenerateRandomPort()
userID := obj.Annotations["field.cattle.io/creatorId"]
user, err := l.UserClient.Get(userID, metav1.GetOptions{})
if err != nil {
return err
}
token, err := l.UserManager.EnsureToken(helmTokenPrefix+user.Name, description, user.Name)
if err != nil {
return err
}
kubeConfig := l.KubeConfigGetter.KubeConfig(l.ClusterName, token)
if err := os.MkdirAll(filepath.Join(tempDir, obj.Namespace), 0755); err != nil {
return err
}
kubeConfigPath := filepath.Join(tempDir, obj.Namespace, ".kubeconfig")
if err := clientcmd.WriteToFile(*kubeConfig, kubeConfigPath); err != nil {
return err
}
defer os.RemoveAll(kubeConfigPath)
go hutils.StartTiller(cont, addr, probeAddr, obj.Spec.InstallNamespace, kubeConfigPath)
switch action {
case "install":
if err := hutils.InstallCharts(dir, addr, obj); err != nil {
return err
}
case "delete":
if err := hutils.DeleteCharts(addr, obj); err != nil {
return err
}
}
return nil
}
func (l *Lifecycle) saveTemplates(obj *v3.App, templateVersion *mgmtv3.TemplateVersion) error {
templates := map[string]string{}
for _, file := range templateVersion.Spec.Files {
templates[file.Name] = file.Contents
}
obj.Spec.Templates = templates
return nil
}