/
kubernetes_stages_storage_cache.go
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/
kubernetes_stages_storage_cache.go
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package storage
import (
"context"
"encoding/json"
"fmt"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"github.com/werf/logboek"
"github.com/werf/werf/pkg/image"
"github.com/werf/werf/pkg/kubeutils"
)
const (
StagesStorageCacheConfigMapKey = "stagesStorageCache"
)
type KubernetesStagesStorageCacheOptions struct {
GetConfigMapNameFunc func(projectName string) string
}
func NewKubernetesStagesStorageCache(namespace string, kubeClient kubernetes.Interface, getConfigMapNameFunc func(projectName string) string) *KubernetesStagesStorageCache {
return &KubernetesStagesStorageCache{KubeClient: kubeClient, Namespace: namespace, GetConfigMapNameFunc: getConfigMapNameFunc}
}
type KubernetesStagesStorageCache struct {
KubeClient kubernetes.Interface
Namespace string
GetConfigMapNameFunc func(projectName string) string
}
type KubernetesStagesStorageCacheData struct {
StagesByDigest map[string][]image.StageID `json:"stagesByDigest"`
}
func (cache *KubernetesStagesStorageCache) String() string {
return fmt.Sprintf("kubernetes ns/%s", cache.Namespace)
}
func (cache *KubernetesStagesStorageCache) extractCacheData(ctx context.Context, obj *v1.ConfigMap) (*KubernetesStagesStorageCacheData, error) {
if data, hasKey := obj.Data[StagesStorageCacheConfigMapKey]; hasKey {
var cacheData *KubernetesStagesStorageCacheData
if err := json.Unmarshal([]byte(data), &cacheData); err != nil {
logboek.Context(ctx).Error().LogF("Error unmarshalling storage cache json in cm/%s by key %q: %s: will ignore cache\n", obj.Name, StagesStorageCacheConfigMapKey, err)
return nil, nil
}
return cacheData, nil
} else {
return nil, nil
}
}
func (cache *KubernetesStagesStorageCache) unsetCacheData(obj *v1.ConfigMap) {
if obj.Data != nil {
delete(obj.Data, StagesStorageCacheConfigMapKey)
}
}
func (cache *KubernetesStagesStorageCache) setCacheData(obj *v1.ConfigMap, cacheData *KubernetesStagesStorageCacheData) {
if data, err := json.Marshal(cacheData); err != nil {
panic(fmt.Sprintf("cannot marshal data %#v into json: %s", cacheData, err))
} else {
if obj.Data == nil {
obj.Data = make(map[string]string)
}
obj.Data[StagesStorageCacheConfigMapKey] = string(data)
}
}
//nolint:unused
func (cache *KubernetesStagesStorageCache) getConfigMapName(projectName string) string {
if cache.GetConfigMapNameFunc != nil {
return cache.GetConfigMapNameFunc(projectName)
} else {
return fmt.Sprintf("werf-%s", projectName)
}
}
func (cache *KubernetesStagesStorageCache) GetAllStages(ctx context.Context, projectName string) (bool, []image.StageID, error) {
if obj, err := kubeutils.GetOrCreateConfigMapWithNamespaceIfNotExists(cache.KubeClient, cache.Namespace, cache.GetConfigMapNameFunc(projectName)); err != nil {
return false, nil, err
} else if cacheData, err := cache.extractCacheData(ctx, obj); err != nil {
return false, nil, err
} else if cacheData != nil {
var res []image.StageID
for _, stagesByDigest := range cacheData.StagesByDigest {
res = append(res, stagesByDigest...)
}
return true, res, nil
}
return false, nil, nil
}
func (cache *KubernetesStagesStorageCache) DeleteAllStages(ctx context.Context, projectName string) error {
return cache.changeCacheData(ctx, projectName, func(obj *v1.ConfigMap, cacheData *KubernetesStagesStorageCacheData) error {
cache.unsetCacheData(obj)
return nil
})
}
func (cache *KubernetesStagesStorageCache) GetStagesByDigest(ctx context.Context, projectName, digest string) (bool, []image.StageID, error) {
if obj, err := kubeutils.GetOrCreateConfigMapWithNamespaceIfNotExists(cache.KubeClient, cache.Namespace, cache.GetConfigMapNameFunc(projectName)); err != nil {
return false, nil, err
} else if cacheData, err := cache.extractCacheData(ctx, obj); err != nil {
return false, nil, err
} else if cacheData != nil {
if stages, hasKey := cacheData.StagesByDigest[digest]; hasKey {
return true, stages, nil
}
return false, nil, nil
}
return false, nil, nil
}
func (cache *KubernetesStagesStorageCache) StoreStagesByDigest(ctx context.Context, projectName, digest string, stages []image.StageID) error {
return cache.changeCacheData(ctx, projectName, func(obj *v1.ConfigMap, cacheData *KubernetesStagesStorageCacheData) error {
if cacheData == nil {
cacheData = &KubernetesStagesStorageCacheData{
StagesByDigest: make(map[string][]image.StageID),
}
}
cacheData.StagesByDigest[digest] = stages
cache.setCacheData(obj, cacheData)
return nil
})
}
func (cache *KubernetesStagesStorageCache) DeleteStagesByDigest(ctx context.Context, projectName, digest string) error {
return cache.changeCacheData(ctx, projectName, func(obj *v1.ConfigMap, cacheData *KubernetesStagesStorageCacheData) error {
if cacheData != nil {
delete(cacheData.StagesByDigest, digest)
cache.setCacheData(obj, cacheData)
}
return nil
})
}
func (cache *KubernetesStagesStorageCache) changeCacheData(ctx context.Context, projectName string, changeFunc func(obj *v1.ConfigMap, cacheData *KubernetesStagesStorageCacheData) error) error {
RETRY_CHANGE:
obj, err := kubeutils.GetOrCreateConfigMapWithNamespaceIfNotExists(cache.KubeClient, cache.Namespace, cache.GetConfigMapNameFunc(projectName))
if err != nil {
return err
}
cacheData, err := cache.extractCacheData(ctx, obj)
if err != nil {
return err
}
if err := changeFunc(obj, cacheData); err != nil {
return err
}
_, err = cache.KubeClient.CoreV1().ConfigMaps(cache.Namespace).Update(context.Background(), obj, metav1.UpdateOptions{})
if err != nil {
if errors.IsConflict(err) {
goto RETRY_CHANGE
}
return fmt.Errorf("update cm/%s error: %w", obj.Name, err)
}
return nil
}