// ResourceSingularizer implements RESTMapper
// It converts a resource name from plural to singular (e.g., from pods to pod)
func (m *DefaultRESTMapper) ResourceSingularizer(resourceType string) (string, error) {
partialResource := schema.GroupVersionResource{Resource: resourceType}
resources, err := m.ResourcesFor(partialResource)
if err != nil {
return resourceType, err
}
singular := schema.GroupVersionResource{}
for _, curr := range resources {
currSingular, ok := m.pluralToSingular[curr]
if !ok {
continue
}
if singular.Empty() {
singular = currSingular
continue
}
if currSingular.Resource != singular.Resource {
return resourceType, fmt.Errorf("multiple possible singular resources (%v) found for %v", resources, resourceType)
}
}
if singular.Empty() {
return resourceType, fmt.Errorf("no singular of resource %v has been defined", resourceType)
}
return singular.Resource, nil
}
// expandResourceShortcut will return the expanded version of resource
// (something that a pkg/api/meta.RESTMapper can understand), if it is
// indeed a shortcut. If no match has been found, we will match on group prefixing.
// Lastly we will return resource unmodified.
func (e ShortcutExpander) expandResourceShortcut(resource schema.GroupVersionResource) schema.GroupVersionResource {
// get the shortcut mappings and return on first match.
if resources, err := e.getShortcutMappings(); err == nil {
for _, item := range resources {
if len(resource.Group) != 0 && resource.Group != item.ShortForm.Group {
continue
}
if resource.Resource == item.ShortForm.Resource {
resource.Resource = item.LongForm.Resource
return resource
}
}
// we didn't find exact match so match on group prefixing. This allows autoscal to match autoscaling
if len(resource.Group) == 0 {
return resource
}
for _, item := range resources {
if !strings.HasPrefix(item.ShortForm.Group, resource.Group) {
continue
}
if resource.Resource == item.ShortForm.Resource {
resource.Resource = item.LongForm.Resource
return resource
}
}
}
return resource
}
// coerceResourceForMatching makes the resource lower case and converts internal versions to unspecified (legacy behavior)
func coerceResourceForMatching(resource schema.GroupVersionResource) schema.GroupVersionResource {
resource.Resource = strings.ToLower(resource.Resource)
if resource.Version == runtime.APIVersionInternal {
resource.Version = ""
}
return resource
}
func (gc *GarbageCollector) monitorFor(resource schema.GroupVersionResource, kind schema.GroupVersionKind) (monitor, error) {
// TODO: consider store in one storage.
glog.V(6).Infof("create storage for resource %s", resource)
var monitor monitor
client, err := gc.metaOnlyClientPool.ClientForGroupVersionKind(kind)
if err != nil {
return monitor, err
}
gc.registeredRateLimiterForMonitors.registerIfNotPresent(resource.GroupVersion(), client, "garbage_collector_monitoring")
setObjectTypeMeta := func(obj interface{}) {
runtimeObject, ok := obj.(runtime.Object)
if !ok {
utilruntime.HandleError(fmt.Errorf("expected runtime.Object, got %#v", obj))
}
runtimeObject.GetObjectKind().SetGroupVersionKind(kind)
}
monitor.store, monitor.controller = cache.NewInformer(
gcListWatcher(client, resource),
nil,
ResourceResyncTime,
cache.ResourceEventHandlerFuncs{
// add the event to the propagator's eventQueue.
AddFunc: func(obj interface{}) {
setObjectTypeMeta(obj)
event := &event{
eventType: addEvent,
obj: obj,
}
gc.propagator.eventQueue.Add(&workqueue.TimedWorkQueueItem{StartTime: gc.clock.Now(), Object: event})
},
UpdateFunc: func(oldObj, newObj interface{}) {
setObjectTypeMeta(newObj)
event := &event{updateEvent, newObj, oldObj}
gc.propagator.eventQueue.Add(&workqueue.TimedWorkQueueItem{StartTime: gc.clock.Now(), Object: event})
},
DeleteFunc: func(obj interface{}) {
// delta fifo may wrap the object in a cache.DeletedFinalStateUnknown, unwrap it
if deletedFinalStateUnknown, ok := obj.(cache.DeletedFinalStateUnknown); ok {
obj = deletedFinalStateUnknown.Obj
}
setObjectTypeMeta(obj)
event := &event{
eventType: deleteEvent,
obj: obj,
}
gc.propagator.eventQueue.Add(&workqueue.TimedWorkQueueItem{StartTime: gc.clock.Now(), Object: event})
},
},
)
return monitor, nil
}
// ForResource gives generic access to a shared informer of the matching type
// TODO extend this to unknown resources with a client pool
func (f *sharedInformerFactory) ForResource(resource schema.GroupVersionResource) (GenericInformer, error) {
switch resource {
// Group=Apiregistration, Version=InternalVersion
case apiregistration.SchemeGroupVersion.WithResource("apiservices"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Apiregistration().InternalVersion().APIServices().Informer()}, nil
// Group=Apiregistration, Version=V1alpha1
case v1alpha1.SchemeGroupVersion.WithResource("apiservices"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Apiregistration().V1alpha1().APIServices().Informer()}, nil
}
return nil, fmt.Errorf("no informer found for %v", resource)
}
func (o *ResourceConfig) ResourceEnabled(resource schema.GroupVersionResource) bool {
versionOverride, versionExists := o.GroupVersionResourceConfigs[resource.GroupVersion()]
if !versionExists {
return false
}
if !versionOverride.Enable {
return false
}
if versionOverride.DisabledResources.Has(resource.Resource) {
return false
}
if len(versionOverride.EnabledResources) > 0 {
return versionOverride.EnabledResources.Has(resource.Resource)
}
return true
}
// estimateGrracefulTermination will estimate the graceful termination required for the specific entity in the namespace
func estimateGracefulTermination(kubeClient clientset.Interface, groupVersionResource schema.GroupVersionResource, ns string, namespaceDeletedAt metav1.Time) (int64, error) {
groupResource := groupVersionResource.GroupResource()
glog.V(5).Infof("namespace controller - estimateGracefulTermination - group %s, resource: %s", groupResource.Group, groupResource.Resource)
estimate := int64(0)
var err error
switch groupResource {
case schema.GroupResource{Group: "", Resource: "pods"}:
estimate, err = estimateGracefulTerminationForPods(kubeClient, ns)
}
if err != nil {
return estimate, err
}
// determine if the estimate is greater than the deletion timestamp
duration := time.Since(namespaceDeletedAt.Time)
allowedEstimate := time.Duration(estimate) * time.Second
if duration >= allowedEstimate {
estimate = int64(0)
}
return estimate, nil
}
// ForResource gives generic access to a shared informer of the matching type
// TODO extend this to unknown resources with a client pool
func (f *sharedInformerFactory) ForResource(resource schema.GroupVersionResource) (GenericInformer, error) {
switch resource {
// Group=Apps, Version=InternalVersion
case apps.SchemeGroupVersion.WithResource("statefulsets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Apps().InternalVersion().StatefulSets().Informer()}, nil
// Group=Apps, Version=V1beta1
case v1beta1.SchemeGroupVersion.WithResource("statefulsets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Apps().V1beta1().StatefulSets().Informer()}, nil
// Group=Autoscaling, Version=InternalVersion
case autoscaling.SchemeGroupVersion.WithResource("horizontalpodautoscalers"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Autoscaling().InternalVersion().HorizontalPodAutoscalers().Informer()}, nil
// Group=Autoscaling, Version=V1
case v1.SchemeGroupVersion.WithResource("horizontalpodautoscalers"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Autoscaling().V1().HorizontalPodAutoscalers().Informer()}, nil
// Group=Batch, Version=InternalVersion
case batch.SchemeGroupVersion.WithResource("cronjobs"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Batch().InternalVersion().CronJobs().Informer()}, nil
case batch.SchemeGroupVersion.WithResource("jobs"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Batch().InternalVersion().Jobs().Informer()}, nil
// Group=Batch, Version=V1
case batch_v1.SchemeGroupVersion.WithResource("jobs"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Batch().V1().Jobs().Informer()}, nil
// Group=Batch, Version=V2alpha1
case v2alpha1.SchemeGroupVersion.WithResource("cronjobs"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Batch().V2alpha1().CronJobs().Informer()}, nil
case v2alpha1.SchemeGroupVersion.WithResource("jobs"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Batch().V2alpha1().Jobs().Informer()}, nil
// Group=Certificates, Version=InternalVersion
case certificates.SchemeGroupVersion.WithResource("certificatesigningrequests"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Certificates().InternalVersion().CertificateSigningRequests().Informer()}, nil
// Group=Certificates, Version=V1beta1
case certificates_v1beta1.SchemeGroupVersion.WithResource("certificatesigningrequests"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Certificates().V1beta1().CertificateSigningRequests().Informer()}, nil
// Group=Core, Version=InternalVersion
case api.SchemeGroupVersion.WithResource("componentstatuses"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().ComponentStatuses().Informer()}, nil
case api.SchemeGroupVersion.WithResource("configmaps"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().ConfigMaps().Informer()}, nil
case api.SchemeGroupVersion.WithResource("endpoints"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().Endpoints().Informer()}, nil
case api.SchemeGroupVersion.WithResource("events"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().Events().Informer()}, nil
case api.SchemeGroupVersion.WithResource("limitranges"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().LimitRanges().Informer()}, nil
case api.SchemeGroupVersion.WithResource("namespaces"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().Namespaces().Informer()}, nil
case api.SchemeGroupVersion.WithResource("nodes"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().Nodes().Informer()}, nil
case api.SchemeGroupVersion.WithResource("persistentvolumes"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().PersistentVolumes().Informer()}, nil
case api.SchemeGroupVersion.WithResource("persistentvolumeclaims"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().PersistentVolumeClaims().Informer()}, nil
case api.SchemeGroupVersion.WithResource("pods"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().Pods().Informer()}, nil
case api.SchemeGroupVersion.WithResource("podtemplates"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().PodTemplates().Informer()}, nil
case api.SchemeGroupVersion.WithResource("replicationcontrollers"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().ReplicationControllers().Informer()}, nil
case api.SchemeGroupVersion.WithResource("resourcequotas"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().ResourceQuotas().Informer()}, nil
case api.SchemeGroupVersion.WithResource("secrets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().Secrets().Informer()}, nil
case api.SchemeGroupVersion.WithResource("services"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().Services().Informer()}, nil
case api.SchemeGroupVersion.WithResource("serviceaccounts"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().InternalVersion().ServiceAccounts().Informer()}, nil
// Group=Core, Version=V1
case api_v1.SchemeGroupVersion.WithResource("componentstatuses"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().ComponentStatuses().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("configmaps"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().ConfigMaps().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("endpoints"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().Endpoints().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("events"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().Events().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("limitranges"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().LimitRanges().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("namespaces"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().Namespaces().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("nodes"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().Nodes().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("persistentvolumes"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().PersistentVolumes().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("persistentvolumeclaims"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().PersistentVolumeClaims().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("pods"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().Pods().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("podtemplates"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().PodTemplates().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("replicationcontrollers"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().ReplicationControllers().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("resourcequotas"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().ResourceQuotas().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("secrets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().Secrets().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("services"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().Services().Informer()}, nil
case api_v1.SchemeGroupVersion.WithResource("serviceaccounts"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Core().V1().ServiceAccounts().Informer()}, nil
// Group=Extensions, Version=InternalVersion
case extensions.SchemeGroupVersion.WithResource("daemonsets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().InternalVersion().DaemonSets().Informer()}, nil
case extensions.SchemeGroupVersion.WithResource("deployments"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().InternalVersion().Deployments().Informer()}, nil
case extensions.SchemeGroupVersion.WithResource("ingresses"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().InternalVersion().Ingresses().Informer()}, nil
case extensions.SchemeGroupVersion.WithResource("networkpolicies"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().InternalVersion().NetworkPolicies().Informer()}, nil
case extensions.SchemeGroupVersion.WithResource("podsecuritypolicies"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().InternalVersion().PodSecurityPolicies().Informer()}, nil
case extensions.SchemeGroupVersion.WithResource("replicasets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().InternalVersion().ReplicaSets().Informer()}, nil
case extensions.SchemeGroupVersion.WithResource("thirdpartyresources"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().InternalVersion().ThirdPartyResources().Informer()}, nil
// Group=Extensions, Version=V1beta1
case extensions_v1beta1.SchemeGroupVersion.WithResource("daemonsets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().V1beta1().DaemonSets().Informer()}, nil
case extensions_v1beta1.SchemeGroupVersion.WithResource("deployments"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().V1beta1().Deployments().Informer()}, nil
case extensions_v1beta1.SchemeGroupVersion.WithResource("ingresses"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().V1beta1().Ingresses().Informer()}, nil
case extensions_v1beta1.SchemeGroupVersion.WithResource("podsecuritypolicies"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().V1beta1().PodSecurityPolicies().Informer()}, nil
case extensions_v1beta1.SchemeGroupVersion.WithResource("replicasets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().V1beta1().ReplicaSets().Informer()}, nil
case extensions_v1beta1.SchemeGroupVersion.WithResource("thirdpartyresources"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Extensions().V1beta1().ThirdPartyResources().Informer()}, nil
// Group=Policy, Version=InternalVersion
case policy.SchemeGroupVersion.WithResource("poddisruptionbudgets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Policy().InternalVersion().PodDisruptionBudgets().Informer()}, nil
// Group=Policy, Version=V1beta1
case policy_v1beta1.SchemeGroupVersion.WithResource("poddisruptionbudgets"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Policy().V1beta1().PodDisruptionBudgets().Informer()}, nil
// Group=Rbac, Version=InternalVersion
case rbac.SchemeGroupVersion.WithResource("clusterroles"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().InternalVersion().ClusterRoles().Informer()}, nil
case rbac.SchemeGroupVersion.WithResource("clusterrolebindings"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().InternalVersion().ClusterRoleBindings().Informer()}, nil
case rbac.SchemeGroupVersion.WithResource("roles"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().InternalVersion().Roles().Informer()}, nil
case rbac.SchemeGroupVersion.WithResource("rolebindings"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().InternalVersion().RoleBindings().Informer()}, nil
// Group=Rbac, Version=V1alpha1
case v1alpha1.SchemeGroupVersion.WithResource("clusterroles"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1alpha1().ClusterRoles().Informer()}, nil
case v1alpha1.SchemeGroupVersion.WithResource("clusterrolebindings"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1alpha1().ClusterRoleBindings().Informer()}, nil
case v1alpha1.SchemeGroupVersion.WithResource("roles"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1alpha1().Roles().Informer()}, nil
case v1alpha1.SchemeGroupVersion.WithResource("rolebindings"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1alpha1().RoleBindings().Informer()}, nil
// Group=Rbac, Version=V1beta1
case rbac_v1beta1.SchemeGroupVersion.WithResource("clusterroles"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1beta1().ClusterRoles().Informer()}, nil
case rbac_v1beta1.SchemeGroupVersion.WithResource("clusterrolebindings"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1beta1().ClusterRoleBindings().Informer()}, nil
case rbac_v1beta1.SchemeGroupVersion.WithResource("roles"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1beta1().Roles().Informer()}, nil
case rbac_v1beta1.SchemeGroupVersion.WithResource("rolebindings"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Rbac().V1beta1().RoleBindings().Informer()}, nil
// Group=Storage, Version=InternalVersion
case storage.SchemeGroupVersion.WithResource("storageclasses"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Storage().InternalVersion().StorageClasses().Informer()}, nil
// Group=Storage, Version=V1beta1
case storage_v1beta1.SchemeGroupVersion.WithResource("storageclasses"):
return &genericInformer{resource: resource.GroupResource(), informer: f.Storage().V1beta1().StorageClasses().Informer()}, nil
}
return nil, fmt.Errorf("no informer found for %v", resource)
}
// TODO turn this into reusable method checking available resources
func contains(resourcesList []*metav1.APIResourceList, resource schema.GroupVersionResource) bool {
resources := discovery.FilteredBy(discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
return resource.GroupVersion().String() == gv && resource.Resource == r.Name
}), resourcesList)
return len(resources) != 0
}
// patchResource divides PatchResource for easier unit testing
func patchResource(
ctx request.Context,
admit updateAdmissionFunc,
timeout time.Duration,
versionedObj runtime.Object,
patcher rest.Patcher,
name string,
patchType types.PatchType,
patchJS []byte,
namer ScopeNamer,
copier runtime.ObjectCopier,
resource schema.GroupVersionResource,
codec runtime.Codec,
) (runtime.Object, error) {
namespace := request.NamespaceValue(ctx)
var (
originalObjJS []byte
originalPatchedObjJS []byte
originalObjMap map[string]interface{}
originalPatchMap map[string]interface{}
lastConflictErr error
)
// applyPatch is called every time GuaranteedUpdate asks for the updated object,
// and is given the currently persisted object as input.
applyPatch := func(_ request.Context, _, currentObject runtime.Object) (runtime.Object, error) {
// Make sure we actually have a persisted currentObject
if hasUID, err := hasUID(currentObject); err != nil {
return nil, err
} else if !hasUID {
return nil, errors.NewNotFound(resource.GroupResource(), name)
}
switch {
case originalObjJS == nil && originalObjMap == nil:
// first time through,
// 1. apply the patch
// 2. save the original and patched to detect whether there were conflicting changes on retries
objToUpdate := patcher.New()
// For performance reasons, in case of strategicpatch, we avoid json
// marshaling and unmarshaling and operate just on map[string]interface{}.
// In case of other patch types, we still have to operate on JSON
// representations.
switch patchType {
case types.JSONPatchType, types.MergePatchType:
originalJS, patchedJS, err := patchObjectJSON(patchType, codec, currentObject, patchJS, objToUpdate, versionedObj)
if err != nil {
return nil, err
}
originalObjJS, originalPatchedObjJS = originalJS, patchedJS
case types.StrategicMergePatchType:
originalMap, patchMap, err := strategicPatchObject(codec, currentObject, patchJS, objToUpdate, versionedObj)
if err != nil {
return nil, err
}
originalObjMap, originalPatchMap = originalMap, patchMap
}
if err := checkName(objToUpdate, name, namespace, namer); err != nil {
return nil, err
}
return objToUpdate, nil
default:
// on a conflict,
// 1. build a strategic merge patch from originalJS and the patchedJS. Different patch types can
// be specified, but a strategic merge patch should be expressive enough handle them. Build the
// patch with this type to handle those cases.
// 2. build a strategic merge patch from originalJS and the currentJS
// 3. ensure no conflicts between the two patches
// 4. apply the #1 patch to the currentJS object
// TODO: This should be one-step conversion that doesn't require
// json marshaling and unmarshaling once #39017 is fixed.
data, err := runtime.Encode(codec, currentObject)
if err != nil {
return nil, err
}
currentObjMap := make(map[string]interface{})
if err := json.Unmarshal(data, ¤tObjMap); err != nil {
return nil, err
}
var currentPatchMap map[string]interface{}
if originalObjMap != nil {
var err error
currentPatchMap, err = strategicpatch.CreateTwoWayMergeMapPatch(originalObjMap, currentObjMap, versionedObj)
if err != nil {
return nil, err
}
} else {
if originalPatchMap == nil {
// Compute original patch, if we already didn't do this in previous retries.
originalPatch, err := strategicpatch.CreateTwoWayMergePatch(originalObjJS, originalPatchedObjJS, versionedObj)
if err != nil {
return nil, err
}
originalPatchMap = make(map[string]interface{})
if err := json.Unmarshal(originalPatch, &originalPatchMap); err != nil {
return nil, err
}
}
// Compute current patch.
currentObjJS, err := runtime.Encode(codec, currentObject)
if err != nil {
return nil, err
}
currentPatch, err := strategicpatch.CreateTwoWayMergePatch(originalObjJS, currentObjJS, versionedObj)
if err != nil {
return nil, err
}
currentPatchMap = make(map[string]interface{})
if err := json.Unmarshal(currentPatch, ¤tPatchMap); err != nil {
return nil, err
}
}
hasConflicts, err := strategicpatch.HasConflicts(originalPatchMap, currentPatchMap)
if err != nil {
return nil, err
}
if hasConflicts {
if glog.V(4) {
diff1, _ := json.Marshal(currentPatchMap)
diff2, _ := json.Marshal(originalPatchMap)
glog.Infof("patchResource failed for resource %s, because there is a meaningful conflict.\n diff1=%v\n, diff2=%v\n", name, diff1, diff2)
}
// Return the last conflict error we got if we have one
if lastConflictErr != nil {
return nil, lastConflictErr
}
// Otherwise manufacture one of our own
return nil, errors.NewConflict(resource.GroupResource(), name, nil)
}
objToUpdate := patcher.New()
if err := applyPatchToObject(codec, currentObjMap, originalPatchMap, objToUpdate, versionedObj); err != nil {
return nil, err
}
return objToUpdate, nil
}
}
// applyAdmission is called every time GuaranteedUpdate asks for the updated object,
// and is given the currently persisted object and the patched object as input.
applyAdmission := func(ctx request.Context, patchedObject runtime.Object, currentObject runtime.Object) (runtime.Object, error) {
return patchedObject, admit(patchedObject, currentObject)
}
updatedObjectInfo := rest.DefaultUpdatedObjectInfo(nil, copier, applyPatch, applyAdmission)
return finishRequest(timeout, func() (runtime.Object, error) {
updateObject, _, updateErr := patcher.Update(ctx, name, updatedObjectInfo)
for i := 0; i < maxRetryWhenPatchConflicts && (errors.IsConflict(updateErr)); i++ {
lastConflictErr = updateErr
updateObject, _, updateErr = patcher.Update(ctx, name, updatedObjectInfo)
}
return updateObject, updateErr
})
}