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common.go
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common.go
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package helm
import (
"bytes"
"context"
"encoding/base64"
"io/ioutil"
"math"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/pkg/errors"
helmlib "github.com/rancher/rancher/pkg/catalog/helm"
"github.com/rancher/rancher/pkg/controllers/user/helm/common"
"github.com/rancher/rancher/pkg/jailer"
v3 "github.com/rancher/types/apis/project.cattle.io/v3"
"github.com/sirupsen/logrus"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
helmName = "helm"
appLabel = "io.cattle.field/appId"
failedLabel = "io.cattle.field/failed-revision"
)
func writeTempDir(rootDir string, files map[string]string) error {
for name, content := range files {
fp := filepath.Join(rootDir, name)
if err := os.MkdirAll(filepath.Dir(fp), 0755); err != nil {
return err
}
if err := ioutil.WriteFile(fp, []byte(content), 0644); err != nil {
return err
}
}
return nil
}
func getAppSubDir(files map[string]string) string {
var minLen = math.MaxInt32
var appSubDir string
for filename := range files {
dir, file := filepath.Split(filename)
if strings.EqualFold(file, "Chart.yaml") {
pathLen := len(filepath.SplitList(dir))
if minLen > pathLen {
appSubDir = dir
minLen = pathLen
}
}
}
return appSubDir
}
func helmInstall(tempDirs *common.HelmPath, app *v3.App) error {
cont, cancel := context.WithCancel(context.Background())
defer cancel()
addr := common.GenerateRandomPort()
go func() {
err := common.StartTiller(cont, tempDirs, addr, app.Spec.TargetNamespace)
if err != nil {
logrus.Errorf("got error while stopping tiller, error message: %s", err.Error())
}
}()
return common.InstallCharts(tempDirs, addr, app)
}
func helmDelete(tempDirs *common.HelmPath, app *v3.App) error {
cont, cancel := context.WithCancel(context.Background())
defer cancel()
addr := common.GenerateRandomPort()
go func() {
err := common.StartTiller(cont, tempDirs, addr, app.Spec.TargetNamespace)
if err != nil {
logrus.Errorf("got error while stopping tiller, error message: %s", err.Error())
}
}()
return common.DeleteCharts(tempDirs, addr, app)
}
func (l *Lifecycle) generateTemplates(obj *v3.App) (string, string, *common.HelmPath, error) {
var appSubDir string
files := map[string]string{}
if obj.Spec.ExternalID != "" {
templateVersionID, templateVersionNamespace, err := common.ParseExternalID(obj.Spec.ExternalID)
if err != nil {
return "", "", nil, err
}
templateVersion, err := l.TemplateVersionClient.GetNamespaced(templateVersionNamespace, templateVersionID, metav1.GetOptions{})
if err != nil {
return "", "", nil, err
}
namespace, catalogName, catalogType, _, _, err := common.SplitExternalID(templateVersion.Spec.ExternalID)
if err != nil {
return "", "", nil, err
}
catalog, err := helmlib.GetCatalog(catalogType, namespace, catalogName, l.CatalogLister, l.ClusterCatalogLister, l.ProjectCatalogLister)
if err != nil {
return "", "", nil, err
}
helm, err := helmlib.New(catalog)
if err != nil {
return "", "", nil, err
}
files, err = helm.LoadChart(&templateVersion.Spec, nil)
if err != nil {
return "", "", nil, err
}
appSubDir = templateVersion.Spec.VersionName
} else {
for k, v := range obj.Spec.Files {
content, err := base64.StdEncoding.DecodeString(v)
if err != nil {
return "", "", nil, err
}
files[k] = string(content)
}
appSubDir = getAppSubDir(files)
}
tempDir, err := createTempDir(obj)
if err != nil {
return "", "", nil, err
}
if err := writeTempDir(tempDir.FullPath, files); err != nil {
return "", "", nil, err
}
appDir := filepath.Join(tempDir.InJailPath, appSubDir)
tempDir.AppDirInJail = appDir
tempDir.AppDirFull = filepath.Join(tempDir.FullPath, appSubDir)
extraArgs := common.GetExtraArgs(obj)
setValues, err := common.GenerateAnswerSetValues(obj, tempDir, extraArgs)
if err != nil {
return "", "", nil, err
}
commands := append([]string{"template", appDir, "--name", obj.Name, "--namespace", obj.Spec.TargetNamespace}, setValues...)
cmd := exec.Command(helmName, commands...)
sbOut := &bytes.Buffer{}
sbErr := &bytes.Buffer{}
cmd.Stdout = sbOut
cmd.Stderr = sbErr
cmd, err = common.JailCommand(cmd, tempDir.FullPath)
if err != nil {
return "", "", nil, err
}
if err := cmd.Start(); err != nil {
return "", "", nil, errors.Wrapf(err, "start helm template failed. %s", sbErr.String())
}
if err := cmd.Wait(); err != nil {
return "", "", nil, errors.Wrapf(err, "wait helm template failed. %s", sbErr.String())
}
// notes.txt
commands = append([]string{"template", appDir, "--name", obj.Name, "--namespace", obj.Spec.TargetNamespace, "--notes"}, setValues...)
cmd = exec.Command(helmName, commands...)
noteOut := &bytes.Buffer{}
sbErr = &bytes.Buffer{}
cmd.Stdout = noteOut
cmd.Stderr = sbErr
cmd, err = common.JailCommand(cmd, tempDir.FullPath)
if err != nil {
return "", "", nil, err
}
if err := cmd.Start(); err != nil {
return "", "", nil, errors.Wrapf(err, "start helm template --notes failed. %s", sbErr.String())
}
if err := cmd.Wait(); err != nil {
return "", "", nil, errors.Wrapf(err, "wait helm template --notes failed. %s", sbErr.String())
}
template := sbOut.String()
notes := noteOut.String()
return template, notes, tempDir, nil
}
func createTempDir(obj *v3.App) (*common.HelmPath, error) {
if os.Getenv("CATTLE_DEV_MODE") != "" {
dir, err := ioutil.TempDir("", "helm-")
if err != nil {
return nil, err
}
return &common.HelmPath{
FullPath: dir,
InJailPath: dir,
KubeConfigFull: filepath.Join(dir, ".kubeconfig"),
KubeConfigInJail: filepath.Join(dir, ".kubeconfig"),
}, nil
}
jailDir := obj.Spec.ProjectName + ":" + obj.Name
err := jailer.CreateJail(jailDir)
if err != nil {
return nil, err
}
paths := &common.HelmPath{
FullPath: filepath.Join(jailer.BaseJailPath, jailDir),
InJailPath: "/",
KubeConfigFull: filepath.Join(jailer.BaseJailPath, jailDir, ".kubeconfig"),
KubeConfigInJail: "/.kubeconfig",
}
return paths, nil
}