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updates.go
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updates.go
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package helm
import (
"bytes"
"context"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sort"
"strings"
"sync"
"time"
"github.com/blang/semver"
"github.com/containers/image/v5/docker"
imagetypes "github.com/containers/image/v5/types"
"github.com/pkg/errors"
apptypes "github.com/replicatedhq/kots/pkg/app/types"
"github.com/replicatedhq/kots/pkg/k8sutil"
kotsadmtypes "github.com/replicatedhq/kots/pkg/kotsadm/types"
"github.com/replicatedhq/kots/pkg/kotsutil"
"github.com/replicatedhq/kots/pkg/logger"
storetypes "github.com/replicatedhq/kots/pkg/store/types"
"github.com/replicatedhq/kots/pkg/util"
kotsv1beta1 "github.com/replicatedhq/kotskinds/apis/kots/v1beta1"
"go.uber.org/zap"
"gopkg.in/yaml.v3"
helmgetter "helm.sh/helm/v3/pkg/getter"
corev1 "k8s.io/api/core/v1"
kuberneteserrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes/scheme"
)
type ChartUpdate struct {
Tag string
Version semver.Version
Status storetypes.DownstreamVersionStatus
CreatedOn *time.Time
IsDownloaded bool
}
type ReplicatedMeta struct {
LicenseID string `yaml:"license_id"`
Username string `yaml:"username"`
CreatedAt *time.Time `yaml:"created_at"`
// TODO "app": map[string][]byte
}
type ChartUpdates []ChartUpdate
var (
updateCacheMutex sync.Mutex
updateCache map[string]ChartUpdates // available updates sorted in descending order for each chart
)
func init() {
updateCache = make(map[string]ChartUpdates)
}
func (v ChartUpdates) Len() int {
return len(v)
}
func (v ChartUpdates) Swap(i, j int) {
v[i], v[j] = v[j], v[i]
}
func (v ChartUpdates) Less(i, j int) bool {
return v[i].Version.LT(v[j].Version)
}
func (u ChartUpdates) ToTagList() []string {
tags := []string{}
for _, update := range u {
tags = append(tags, update.Tag)
}
return tags
}
func GetCachedUpdates(chartPath string) ChartUpdates {
updateCacheMutex.Lock()
defer updateCacheMutex.Unlock()
return updateCache[chartPath]
}
func GetDownloadedUpdates(chartPath string) ChartUpdates {
updateCacheMutex.Lock()
defer updateCacheMutex.Unlock()
downloadedUpdates := ChartUpdates{}
for _, u := range updateCache[chartPath] {
if u.IsDownloaded {
downloadedUpdates = append(downloadedUpdates, u)
}
}
return downloadedUpdates
}
func SetCachedUpdateStatus(chartPath string, tag string, status storetypes.DownstreamVersionStatus) {
updates := GetCachedUpdates(chartPath)
for i, u := range updates {
if u.Tag == tag {
updates[i].Status = status
break
}
}
}
func SetCachedUpdateMetadata(chartPath string, tag string, meta *ReplicatedMeta) {
updates := GetCachedUpdates(chartPath)
for i, u := range updates {
if u.Tag == tag {
updates[i].IsDownloaded = true // Metadata is only known when version is downloaded
if meta != nil {
updates[i].CreatedOn = meta.CreatedAt
}
break
}
}
}
func setCachedUpdates(chartPath string, updates ChartUpdates) {
updateCacheMutex.Lock()
defer updateCacheMutex.Unlock()
updateCache[chartPath] = updates
}
// Removes this tag from cache and also every tag that is less than this one according to semver ordering
func removeFromCachedUpdates(chartPath string, tag string) {
updateCacheMutex.Lock()
defer updateCacheMutex.Unlock()
version, parseErr := semver.ParseTolerant(tag)
existingList := updateCache[chartPath]
newList := ChartUpdates{}
for _, update := range existingList {
// If tag cannot be parsed, fall back on string comparison.
// This should never happen for versions that are on the list because we only include valid semvers and Helm chart versions are valid semvers.
if parseErr != nil {
if update.Tag != tag {
newList = append(newList, update)
}
} else if update.Version.GT(version) {
newList = append(newList, update)
}
}
updateCache[chartPath] = newList
}
func deleteUpdateCacheForChart(chartPath string) {
updateCacheMutex.Lock()
defer updateCacheMutex.Unlock()
delete(updateCache, chartPath)
}
func CheckForUpdates(helmApp *apptypes.HelmApp, license *kotsv1beta1.License, currentVersion *semver.Version) (ChartUpdates, error) {
chartPath := helmApp.ChartPath
licenseID := license.Spec.LicenseID
_, err := SyncLicense(helmApp)
if err != nil {
return nil, errors.Wrapf(err, "failed to sync license before update check")
}
imageName := strings.TrimLeft(chartPath, "oci:")
ref, err := docker.ParseReference(imageName)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse image ref %q", imageName)
}
sysCtx := &imagetypes.SystemContext{
DockerInsecureSkipTLSVerify: imagetypes.OptionalBoolTrue,
DockerDisableV1Ping: true,
DockerAuthConfig: &imagetypes.DockerAuthConfig{
Username: licenseID,
Password: licenseID,
},
}
tags, err := docker.GetRepositoryTags(context.TODO(), sysCtx, ref)
if err != nil {
return nil, errors.Wrapf(err, "failed to get repo tags")
}
tags = removeDuplicates(tags) // registry should not be returning duplicate tags
availableUpdates := ChartUpdates{}
for _, tag := range tags {
v, err := semver.ParseTolerant(tag)
if err != nil {
// TODO: log
continue
}
if currentVersion != nil && v.LE(*currentVersion) {
continue
}
availableUpdates = append(availableUpdates, ChartUpdate{
Tag: tag,
Version: v,
IsDownloaded: false,
})
}
sort.Sort(sort.Reverse(ChartUpdates(availableUpdates)))
setCachedUpdates(chartPath, availableUpdates)
return availableUpdates, nil
}
func removeDuplicates(tags []string) []string {
m := map[string]struct{}{}
for _, tag := range tags {
m[tag] = struct{}{}
}
u := []string{}
for k := range m {
u = append(u, k)
}
return u
}
func GetKotsKindsFromUpstreamChartVersion(helmApp *apptypes.HelmApp, licenseID string, version string) (kotsutil.KotsKinds, error) {
secret, err := GetReplicatedSecretFromUpstreamChartVersion(helmApp, licenseID, version)
if err != nil {
return kotsutil.KotsKinds{}, errors.Wrap(err, "failed to get secret upstream archive")
}
kotsKinds, err := GetKotsKindsFromReplicatedSecret(secret)
if err != nil {
return kotsKinds, errors.Wrap(err, "failed to get kots kinds from secret")
}
return kotsKinds, nil
}
func GetReplicatedSecretFromUpstreamChartVersion(helmApp *apptypes.HelmApp, licenseID string, version string) (*corev1.Secret, error) {
chartData, err := downloadChartReleaseIfNeeded(helmApp, licenseID, version)
if err != nil {
return nil, errors.Wrap(err, "failed to get chart data")
}
templatedData, err := util.GetFileFromTGZArchive(chartData, "**/templates/_replicated/secret.yaml")
if err != nil {
return nil, errors.Wrap(err, "failed to get secret file from chart archive")
}
secretData, err := removeHelmTemplate(templatedData.Bytes())
if err != nil {
return nil, errors.Wrap(err, "failed to remove helm templates from replicated secret file")
}
decode := scheme.Codecs.UniversalDeserializer().Decode
obj, gvk, err := decode(secretData, nil, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to decode secret data")
}
if gvk.Group != "" || gvk.Version != "v1" || gvk.Kind != "Secret" {
return nil, errors.Errorf("unexpected secret GVK: %s", gvk.String())
}
return obj.(*corev1.Secret), nil
}
func GetReplicatedMetadataFromUpstreamChartVersion(helmApp *apptypes.HelmApp, licenseID string, version string) (*ReplicatedMeta, error) {
chartData, err := downloadChartReleaseIfNeeded(helmApp, licenseID, version)
if err != nil {
return nil, errors.Wrap(err, "failed to get chart data")
}
valuesData, err := util.GetFileFromTGZArchive(chartData, "**/values.yaml")
if err != nil {
return nil, errors.Wrap(err, "failed to get values.yaml from chart archive")
}
b := valuesData.Bytes()
values := struct {
Replicated *ReplicatedMeta `yaml:"replicated,omitempty"`
}{}
err = yaml.Unmarshal(b, &values)
if err != nil {
return nil, errors.Wrap(err, "failed to decode values.yaml")
}
return values.Replicated, nil
}
func downloadChartReleaseIfNeeded(helmApp *apptypes.HelmApp, licenseID string, version string) (*bytes.Buffer, error) {
chartData, err := getUpdateChartFromCache(helmApp, version)
if err != nil {
return nil, errors.Wrap(err, "failed to get release from cache")
}
if chartData != nil {
return chartData, nil
}
err = CreateHelmRegistryCreds(licenseID, licenseID, helmApp.ChartPath)
if err != nil {
return nil, errors.Wrap(err, "failed to create helm credentials file")
}
chartGetter, err := helmgetter.NewOCIGetter()
if err != nil {
return nil, errors.Wrap(err, "failed to create chart getter")
}
imageName := fmt.Sprintf("%s:%s", helmApp.ChartPath, version)
chartData, err = chartGetter.Get(imageName)
if err != nil {
return nil, errors.Wrapf(err, "failed to get chart %q", imageName)
}
chartData, err = saveUpdateChartInCache(helmApp, version, chartData)
if err != nil {
logger.Info("failed to save chart in cache", zap.String("error", err.Error()))
}
return chartData, nil
}
var (
updateCacheDir = ""
)
func getUpdateChartFromCache(helmApp *apptypes.HelmApp, version string) (*bytes.Buffer, error) {
fileName := getUpdateChacheFileName(helmApp, version)
b, err := os.ReadFile(fileName)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, errors.Wrap(err, "failed to read file")
}
return bytes.NewBuffer(b), nil
}
func saveUpdateChartInCache(helmApp *apptypes.HelmApp, version string, data *bytes.Buffer) (*bytes.Buffer, error) {
b := data.Bytes()
newBuff := bytes.NewBuffer(b)
if updateCacheDir == "" {
dirName, err := ioutil.TempDir("", "chart-updates-")
if err != nil {
return newBuff, errors.Wrap(err, "failed to create temp dir")
}
updateCacheDir = dirName
}
fileName := getUpdateChacheFileName(helmApp, version)
err := os.MkdirAll(filepath.Dir(fileName), 0755)
if err != nil {
return newBuff, errors.Wrap(err, "failed to create cache dir")
}
err = ioutil.WriteFile(fileName, b, 0744)
if err != nil {
return newBuff, errors.Wrap(err, "failed to save cache file")
}
return newBuff, nil
}
func getUpdateChacheFileName(helmApp *apptypes.HelmApp, version string) string {
return filepath.Join(updateCacheDir, strings.TrimPrefix(helmApp.ChartPath, "oci://"), fmt.Sprintf("%s.tgz", version))
}
func GetUpdateCheckSpec(helmApp *apptypes.HelmApp) (string, error) {
clientset, err := k8sutil.GetClientset()
if err != nil {
return "", errors.Wrap(err, "failed to get clientset")
}
spec := "@default"
cm, err := clientset.CoreV1().ConfigMaps(util.PodNamespace).Get(context.TODO(), kotsadmtypes.KotsadmConfigMap, metav1.GetOptions{})
if err != nil && !kuberneteserrors.IsNotFound(err) {
return "", errors.Wrap(err, "failed to get configmap")
} else if kuberneteserrors.IsNotFound(err) {
return spec, nil
}
if cm.Data == nil {
return spec, nil
}
key := fmt.Sprintf("update-schedule-%s", helmApp.GetID())
if s := cm.Data[key]; s != "" {
spec = s
}
return spec, nil
}
var configMapMutex sync.Mutex
func SetUpdateCheckSpec(helmApp *apptypes.HelmApp, updateSpec string) error {
configMapMutex.Lock()
defer configMapMutex.Unlock()
clientset, err := k8sutil.GetClientset()
if err != nil {
return errors.Wrap(err, "failed to get clientset")
}
key := fmt.Sprintf("update-schedule-%s", helmApp.GetID())
cm, err := clientset.CoreV1().ConfigMaps(util.PodNamespace).Get(context.TODO(), kotsadmtypes.KotsadmConfigMap, metav1.GetOptions{})
if err != nil && !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get configmap")
} else if kuberneteserrors.IsNotFound(err) {
cm := &corev1.ConfigMap{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ConfigMap",
},
ObjectMeta: metav1.ObjectMeta{
Name: kotsadmtypes.KotsadmConfigMap,
Namespace: util.PodNamespace,
Labels: kotsadmtypes.GetKotsadmLabels(),
},
Data: map[string]string{
key: updateSpec,
},
}
_, err = clientset.CoreV1().ConfigMaps(util.PodNamespace).Create(context.Background(), cm, metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "failed to update config map")
}
}
if cm.Data == nil {
cm.Data = map[string]string{}
}
cm.Data[key] = updateSpec
_, err = clientset.CoreV1().ConfigMaps(util.PodNamespace).Update(context.Background(), cm, metav1.UpdateOptions{})
if err != nil {
return errors.Wrap(err, "failed to update config map")
}
return nil
}