// CreateOrUpdate attempts to update the current etcd state with the provided
// allocation.
func (e *Etcd) CreateOrUpdate(snapshot *api.RangeAllocation) error {
e.lock.Lock()
defer e.lock.Unlock()
last := ""
err := e.storage.GuaranteedUpdate(context.TODO(), e.baseKey, &api.RangeAllocation{}, true, nil,
storage.SimpleUpdate(func(input runtime.Object) (output runtime.Object, err error) {
existing := input.(*api.RangeAllocation)
switch {
case len(snapshot.ResourceVersion) != 0 && len(existing.ResourceVersion) != 0:
if snapshot.ResourceVersion != existing.ResourceVersion {
return nil, k8serr.NewConflict(e.resource, "", fmt.Errorf("the provided resource version does not match"))
}
case len(existing.ResourceVersion) != 0:
return nil, k8serr.NewConflict(e.resource, "", fmt.Errorf("another caller has already initialized the resource"))
}
last = snapshot.ResourceVersion
return snapshot, nil
}),
)
if err != nil {
return storeerr.InterpretUpdateError(err, e.resource, "")
}
err = e.alloc.Restore(snapshot.Range, snapshot.Data)
if err == nil {
e.last = last
}
return err
}
func (r *ScaleREST) Update(ctx genericapirequest.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
rc, err := (*r.registry).GetController(ctx, name, &metav1.GetOptions{})
if err != nil {
return nil, false, errors.NewNotFound(extensions.Resource("replicationcontrollers/scale"), name)
}
oldScale := scaleFromRC(rc)
obj, err := objInfo.UpdatedObject(ctx, oldScale)
if obj == nil {
return nil, false, errors.NewBadRequest(fmt.Sprintf("nil update passed to Scale"))
}
scale, ok := obj.(*extensions.Scale)
if !ok {
return nil, false, errors.NewBadRequest(fmt.Sprintf("wrong object passed to Scale update: %v", obj))
}
if errs := extvalidation.ValidateScale(scale); len(errs) > 0 {
return nil, false, errors.NewInvalid(extensions.Kind("Scale"), scale.Name, errs)
}
rc.Spec.Replicas = scale.Spec.Replicas
rc.ResourceVersion = scale.ResourceVersion
rc, err = (*r.registry).UpdateController(ctx, rc)
if err != nil {
return nil, false, errors.NewConflict(extensions.Resource("replicationcontrollers/scale"), scale.Name, err)
}
return scaleFromRC(rc), false, nil
}
func (c *ErrorDeployments) Update(deployment *extensions.Deployment) (*extensions.Deployment, error) {
switch {
case c.invalid:
return nil, kerrors.NewInvalid(api.Kind(deployment.Kind), deployment.Name, nil)
case c.conflict:
return nil, kerrors.NewConflict(api.Resource(deployment.Kind), deployment.Name, nil)
}
return nil, errors.New("deployment update failure")
}
func (c *ErrorReplicationControllers) Update(controller *api.ReplicationController) (*api.ReplicationController, error) {
switch {
case c.invalid:
return nil, kerrors.NewInvalid(api.Kind(controller.Kind), controller.Name, nil)
case c.conflict:
return nil, kerrors.NewConflict(api.Resource(controller.Kind), controller.Name, nil)
}
return nil, errors.New("Replication controller update failure")
}
func (c *ErrorJobs) Update(job *batch.Job) (*batch.Job, error) {
switch {
case c.invalid:
return nil, kerrors.NewInvalid(api.Kind(job.Kind), job.Name, nil)
case c.conflict:
return nil, kerrors.NewConflict(api.Resource(job.Kind), job.Name, nil)
}
return nil, errors.New("Job update failure")
}
func TestRetryOnConflict(t *testing.T) {
opts := wait.Backoff{Factor: 1.0, Steps: 3}
conflictErr := errors.NewConflict(schema.GroupResource{Resource: "test"}, "other", nil)
// never returns
err := RetryOnConflict(opts, func() error {
return conflictErr
})
if err != conflictErr {
t.Errorf("unexpected error: %v", err)
}
// returns immediately
i := 0
err = RetryOnConflict(opts, func() error {
i++
return nil
})
if err != nil || i != 1 {
t.Errorf("unexpected error: %v", err)
}
// returns immediately on error
testErr := fmt.Errorf("some other error")
err = RetryOnConflict(opts, func() error {
return testErr
})
if err != testErr {
t.Errorf("unexpected error: %v", err)
}
// keeps retrying
i = 0
err = RetryOnConflict(opts, func() error {
if i < 2 {
i++
return errors.NewConflict(schema.GroupResource{Resource: "test"}, "other", nil)
}
return nil
})
if err != nil || i != 2 {
t.Errorf("unexpected error: %v", err)
}
}
// assignPod assigns the given pod to the given machine.
func (r *BindingREST) assignPod(ctx genericapirequest.Context, podID string, machine string, annotations map[string]string) (err error) {
if _, err = r.setPodHostAndAnnotations(ctx, podID, "", machine, annotations); err != nil {
err = storeerr.InterpretGetError(err, api.Resource("pods"), podID)
err = storeerr.InterpretUpdateError(err, api.Resource("pods"), podID)
if _, ok := err.(*errors.StatusError); !ok {
err = errors.NewConflict(api.Resource("pods/binding"), podID, err)
}
}
return
}
func TestApplyRetry(t *testing.T) {
initTestErrorHandler(t)
nameRC, currentRC := readAndAnnotateReplicationController(t, filenameRC)
pathRC := "/namespaces/test/replicationcontrollers/" + nameRC
firstPatch := true
retry := false
getCount := 0
f, tf, _, ns := cmdtesting.NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &fake.RESTClient{
NegotiatedSerializer: ns,
Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
switch p, m := req.URL.Path, req.Method; {
case p == pathRC && m == "GET":
getCount++
bodyRC := ioutil.NopCloser(bytes.NewReader(currentRC))
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: bodyRC}, nil
case p == pathRC && m == "PATCH":
if firstPatch {
firstPatch = false
statusErr := kubeerr.NewConflict(schema.GroupResource{Group: "", Resource: "rc"}, "test-rc", fmt.Errorf("the object has been modified. Please apply at first."))
bodyBytes, _ := json.Marshal(statusErr)
bodyErr := ioutil.NopCloser(bytes.NewReader(bodyBytes))
return &http.Response{StatusCode: http.StatusConflict, Header: defaultHeader(), Body: bodyErr}, nil
}
retry = true
validatePatchApplication(t, req)
bodyRC := ioutil.NopCloser(bytes.NewReader(currentRC))
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: bodyRC}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
errBuf := bytes.NewBuffer([]byte{})
cmd := NewCmdApply(f, buf, errBuf)
cmd.Flags().Set("filename", filenameRC)
cmd.Flags().Set("output", "name")
cmd.Run(cmd, []string{})
if !retry || getCount != 2 {
t.Fatalf("apply didn't retry when get conflict error")
}
// uses the name from the file, not the response
expectRC := "replicationcontroller/" + nameRC + "\n"
if buf.String() != expectRC {
t.Fatalf("unexpected output: %s\nexpected: %s", buf.String(), expectRC)
}
}
// InterpretDeleteError converts a generic error on a delete
// operation into the appropriate API error.
func InterpretDeleteError(err error, qualifiedResource schema.GroupResource, name string) error {
switch {
case storage.IsNotFound(err):
return errors.NewNotFound(qualifiedResource, name)
case storage.IsUnreachable(err):
return errors.NewServerTimeout(qualifiedResource, "delete", 2) // TODO: make configurable or handled at a higher level
case storage.IsConflict(err), storage.IsNodeExist(err), storage.IsInvalidObj(err):
return errors.NewConflict(qualifiedResource, name, err)
case storage.IsInternalError(err):
return errors.NewInternalError(err)
default:
return err
}
}
func (p *testPatcher) Update(ctx request.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
currentPod := p.startingPod
if p.numUpdates > 0 {
currentPod = p.updatePod
}
p.numUpdates++
obj, err := objInfo.UpdatedObject(ctx, currentPod)
if err != nil {
return nil, false, err
}
inPod := obj.(*api.Pod)
if inPod.ResourceVersion != p.updatePod.ResourceVersion {
return nil, false, apierrors.NewConflict(api.Resource("pods"), inPod.Name, fmt.Errorf("existing %v, new %v", p.updatePod.ResourceVersion, inPod.ResourceVersion))
}
return inPod, false, nil
}
func TestRetryOnConflictError(t *testing.T) {
mockClient := &fake.Clientset{}
numTries := 0
retryOnce := func(kubeClient clientset.Interface, namespace *v1.Namespace) (*v1.Namespace, error) {
numTries++
if numTries <= 1 {
return namespace, errors.NewConflict(api.Resource("namespaces"), namespace.Name, fmt.Errorf("ERROR!"))
}
return namespace, nil
}
namespace := &v1.Namespace{}
_, err := retryOnConflictError(mockClient, namespace, retryOnce)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
if numTries != 2 {
t.Errorf("Expected %v, but got %v", 2, numTries)
}
}
func TestAPIStatus(t *testing.T) {
cases := map[error]metav1.Status{
errors.NewNotFound(schema.GroupResource{Group: "legacy.kubernetes.io", Resource: "foos"}, "bar"): {
Status: metav1.StatusFailure,
Code: http.StatusNotFound,
Reason: metav1.StatusReasonNotFound,
Message: "foos.legacy.kubernetes.io \"bar\" not found",
Details: &metav1.StatusDetails{
Group: "legacy.kubernetes.io",
Kind: "foos",
Name: "bar",
},
},
errors.NewAlreadyExists(api.Resource("foos"), "bar"): {
Status: metav1.StatusFailure,
Code: http.StatusConflict,
Reason: "AlreadyExists",
Message: "foos \"bar\" already exists",
Details: &metav1.StatusDetails{
Group: "",
Kind: "foos",
Name: "bar",
},
},
errors.NewConflict(api.Resource("foos"), "bar", stderrs.New("failure")): {
Status: metav1.StatusFailure,
Code: http.StatusConflict,
Reason: "Conflict",
Message: "Operation cannot be fulfilled on foos \"bar\": failure",
Details: &metav1.StatusDetails{
Group: "",
Kind: "foos",
Name: "bar",
},
},
}
for k, v := range cases {
actual := apiStatus(k)
if !reflect.DeepEqual(actual, &v) {
t.Errorf("%s: Expected %#v, Got %#v", k, v, actual)
}
}
}
// BeforeDelete tests whether the object can be gracefully deleted. If graceful is set the object
// should be gracefully deleted, if gracefulPending is set the object has already been gracefully deleted
// (and the provided grace period is longer than the time to deletion), and an error is returned if the
// condition cannot be checked or the gracePeriodSeconds is invalid. The options argument may be updated with
// default values if graceful is true. Second place where we set deletionTimestamp is pkg/registry/generic/registry/store.go
// this function is responsible for setting deletionTimestamp during gracefulDeletion, other one for cascading deletions.
func BeforeDelete(strategy RESTDeleteStrategy, ctx genericapirequest.Context, obj runtime.Object, options *api.DeleteOptions) (graceful, gracefulPending bool, err error) {
objectMeta, gvk, kerr := objectMetaAndKind(strategy, obj)
if kerr != nil {
return false, false, kerr
}
// Checking the Preconditions here to fail early. They'll be enforced later on when we actually do the deletion, too.
if options.Preconditions != nil && options.Preconditions.UID != nil && *options.Preconditions.UID != objectMeta.UID {
return false, false, errors.NewConflict(schema.GroupResource{Group: gvk.Group, Resource: gvk.Kind}, objectMeta.Name, fmt.Errorf("the UID in the precondition (%s) does not match the UID in record (%s). The object might have been deleted and then recreated", *options.Preconditions.UID, objectMeta.UID))
}
gracefulStrategy, ok := strategy.(RESTGracefulDeleteStrategy)
if !ok {
// If we're not deleting gracefully there's no point in updating Generation, as we won't update
// the obcject before deleting it.
return false, false, nil
}
// if the object is already being deleted, no need to update generation.
if objectMeta.DeletionTimestamp != nil {
// if we are already being deleted, we may only shorten the deletion grace period
// this means the object was gracefully deleted previously but deletionGracePeriodSeconds was not set,
// so we force deletion immediately
// IMPORTANT:
// The deletion operation happens in two phases.
// 1. Update to set DeletionGracePeriodSeconds and DeletionTimestamp
// 2. Delete the object from storage.
// If the update succeeds, but the delete fails (network error, internal storage error, etc.),
// a resource was previously left in a state that was non-recoverable. We
// check if the existing stored resource has a grace period as 0 and if so
// attempt to delete immediately in order to recover from this scenario.
if objectMeta.DeletionGracePeriodSeconds == nil || *objectMeta.DeletionGracePeriodSeconds == 0 {
return false, false, nil
}
// only a shorter grace period may be provided by a user
if options.GracePeriodSeconds != nil {
period := int64(*options.GracePeriodSeconds)
if period >= *objectMeta.DeletionGracePeriodSeconds {
return false, true, nil
}
newDeletionTimestamp := metav1.NewTime(
objectMeta.DeletionTimestamp.Add(-time.Second * time.Duration(*objectMeta.DeletionGracePeriodSeconds)).
Add(time.Second * time.Duration(*options.GracePeriodSeconds)))
objectMeta.DeletionTimestamp = &newDeletionTimestamp
objectMeta.DeletionGracePeriodSeconds = &period
return true, false, nil
}
// graceful deletion is pending, do nothing
options.GracePeriodSeconds = objectMeta.DeletionGracePeriodSeconds
return false, true, nil
}
if !gracefulStrategy.CheckGracefulDelete(ctx, obj, options) {
return false, false, nil
}
now := metav1.NewTime(metav1.Now().Add(time.Second * time.Duration(*options.GracePeriodSeconds)))
objectMeta.DeletionTimestamp = &now
objectMeta.DeletionGracePeriodSeconds = options.GracePeriodSeconds
// If it's the first graceful deletion we are going to set the DeletionTimestamp to non-nil.
// Controllers of the object that's being deleted shouldn't take any nontrivial actions, hence its behavior changes.
// Thus we need to bump object's Generation (if set). This handles generation bump during graceful deletion.
// The bump for objects that don't support graceful deletion is handled in pkg/registry/generic/registry/store.go.
if objectMeta.Generation > 0 {
objectMeta.Generation++
}
return true, false, nil
}
// Update performs an atomic update and set of the object. Returns the result of the update
// or an error. If the registry allows create-on-update, the create flow will be executed.
// A bool is returned along with the object and any errors, to indicate object creation.
func (e *Store) Update(ctx genericapirequest.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
key, err := e.KeyFunc(ctx, name)
if err != nil {
return nil, false, err
}
var (
creatingObj runtime.Object
creating = false
)
storagePreconditions := &storage.Preconditions{}
if preconditions := objInfo.Preconditions(); preconditions != nil {
storagePreconditions.UID = preconditions.UID
}
out := e.NewFunc()
// deleteObj is only used in case a deletion is carried out
var deleteObj runtime.Object
err = e.Storage.GuaranteedUpdate(ctx, key, out, true, storagePreconditions, func(existing runtime.Object, res storage.ResponseMeta) (runtime.Object, *uint64, error) {
// Given the existing object, get the new object
obj, err := objInfo.UpdatedObject(ctx, existing)
if err != nil {
return nil, nil, err
}
// If AllowUnconditionalUpdate() is true and the object specified by the user does not have a resource version,
// then we populate it with the latest version.
// Else, we check that the version specified by the user matches the version of latest storage object.
resourceVersion, err := e.Storage.Versioner().ObjectResourceVersion(obj)
if err != nil {
return nil, nil, err
}
doUnconditionalUpdate := resourceVersion == 0 && e.UpdateStrategy.AllowUnconditionalUpdate()
version, err := e.Storage.Versioner().ObjectResourceVersion(existing)
if err != nil {
return nil, nil, err
}
if version == 0 {
if !e.UpdateStrategy.AllowCreateOnUpdate() {
return nil, nil, kubeerr.NewNotFound(e.QualifiedResource, name)
}
creating = true
creatingObj = obj
if err := rest.BeforeCreate(e.CreateStrategy, ctx, obj); err != nil {
return nil, nil, err
}
ttl, err := e.calculateTTL(obj, 0, false)
if err != nil {
return nil, nil, err
}
return obj, &ttl, nil
}
creating = false
creatingObj = nil
if doUnconditionalUpdate {
// Update the object's resource version to match the latest storage object's resource version.
err = e.Storage.Versioner().UpdateObject(obj, res.ResourceVersion)
if err != nil {
return nil, nil, err
}
} else {
// Check if the object's resource version matches the latest resource version.
newVersion, err := e.Storage.Versioner().ObjectResourceVersion(obj)
if err != nil {
return nil, nil, err
}
if newVersion == 0 {
// TODO: The Invalid error should has a field for Resource.
// After that field is added, we should fill the Resource and
// leave the Kind field empty. See the discussion in #18526.
qualifiedKind := schema.GroupKind{Group: e.QualifiedResource.Group, Kind: e.QualifiedResource.Resource}
fieldErrList := field.ErrorList{field.Invalid(field.NewPath("metadata").Child("resourceVersion"), newVersion, "must be specified for an update")}
return nil, nil, kubeerr.NewInvalid(qualifiedKind, name, fieldErrList)
}
if newVersion != version {
return nil, nil, kubeerr.NewConflict(e.QualifiedResource, name, fmt.Errorf(OptimisticLockErrorMsg))
}
}
if err := rest.BeforeUpdate(e.UpdateStrategy, ctx, obj, existing); err != nil {
return nil, nil, err
}
delete := e.shouldDelete(ctx, key, obj, existing)
if delete {
deleteObj = obj
return nil, nil, errEmptiedFinalizers
}
ttl, err := e.calculateTTL(obj, res.TTL, true)
if err != nil {
return nil, nil, err
}
if int64(ttl) != res.TTL {
return obj, &ttl, nil
}
return obj, nil, nil
})
if err != nil {
// delete the object
if err == errEmptiedFinalizers {
return e.deleteForEmptyFinalizers(ctx, name, key, deleteObj, storagePreconditions)
}
if creating {
err = storeerr.InterpretCreateError(err, e.QualifiedResource, name)
err = rest.CheckGeneratedNameError(e.CreateStrategy, err, creatingObj)
} else {
err = storeerr.InterpretUpdateError(err, e.QualifiedResource, name)
}
return nil, false, err
}
if creating {
if e.AfterCreate != nil {
if err := e.AfterCreate(out); err != nil {
return nil, false, err
}
}
} else {
if e.AfterUpdate != nil {
if err := e.AfterUpdate(out); err != nil {
return nil, false, err
}
}
}
if e.Decorator != nil {
if err := e.Decorator(out); err != nil {
return nil, false, err
}
}
return out, creating, nil
}
func (rs *REST) Update(ctx genericapirequest.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
oldService, err := rs.registry.GetService(ctx, name, &metav1.GetOptions{})
if err != nil {
return nil, false, err
}
obj, err := objInfo.UpdatedObject(ctx, oldService)
if err != nil {
return nil, false, err
}
service := obj.(*api.Service)
if !rest.ValidNamespace(ctx, &service.ObjectMeta) {
return nil, false, errors.NewConflict(api.Resource("services"), service.Namespace, fmt.Errorf("Service.Namespace does not match the provided context"))
}
// Copy over non-user fields
// TODO: make this a merge function
if errs := validation.ValidateServiceUpdate(service, oldService); len(errs) > 0 {
return nil, false, errors.NewInvalid(api.Kind("Service"), service.Name, errs)
}
nodePortOp := portallocator.StartOperation(rs.serviceNodePorts)
defer nodePortOp.Finish()
assignNodePorts := shouldAssignNodePorts(service)
oldNodePorts := CollectServiceNodePorts(oldService)
newNodePorts := []int{}
if assignNodePorts {
for i := range service.Spec.Ports {
servicePort := &service.Spec.Ports[i]
nodePort := int(servicePort.NodePort)
if nodePort != 0 {
if !contains(oldNodePorts, nodePort) {
err := nodePortOp.Allocate(nodePort)
if err != nil {
el := field.ErrorList{field.Invalid(field.NewPath("spec", "ports").Index(i).Child("nodePort"), nodePort, err.Error())}
return nil, false, errors.NewInvalid(api.Kind("Service"), service.Name, el)
}
}
} else {
nodePort, err = nodePortOp.AllocateNext()
if err != nil {
// TODO: what error should be returned here? It's not a
// field-level validation failure (the field is valid), and it's
// not really an internal error.
return nil, false, errors.NewInternalError(fmt.Errorf("failed to allocate a nodePort: %v", err))
}
servicePort.NodePort = int32(nodePort)
}
// Detect duplicate node ports; this should have been caught by validation, so we panic
if contains(newNodePorts, nodePort) {
panic("duplicate node port")
}
newNodePorts = append(newNodePorts, nodePort)
}
} else {
// Validate should have validated that nodePort == 0
}
// The comparison loops are O(N^2), but we don't expect N to be huge
// (there's a hard-limit at 2^16, because they're ports; and even 4 ports would be a lot)
for _, oldNodePort := range oldNodePorts {
if !contains(newNodePorts, oldNodePort) {
continue
}
nodePortOp.ReleaseDeferred(oldNodePort)
}
// Remove any LoadBalancerStatus now if Type != LoadBalancer;
// although loadbalancer delete is actually asynchronous, we don't need to expose the user to that complexity.
if service.Spec.Type != api.ServiceTypeLoadBalancer {
service.Status.LoadBalancer = api.LoadBalancerStatus{}
}
success, err := rs.healthCheckNodePortUpdate(oldService, service)
if !success {
return nil, false, err
}
out, err := rs.registry.UpdateService(ctx, service)
if err == nil {
el := nodePortOp.Commit()
if el != nil {
// problems should be fixed by an eventual reconciliation / restart
glog.Errorf("error(s) committing NodePorts changes: %v", el)
}
}
return out, false, err
}
// Delete enforces life-cycle rules for namespace termination
func (r *REST) Delete(ctx genericapirequest.Context, name string, options *api.DeleteOptions) (runtime.Object, error) {
nsObj, err := r.Get(ctx, name, &metav1.GetOptions{})
if err != nil {
return nil, err
}
namespace := nsObj.(*api.Namespace)
// Ensure we have a UID precondition
if options == nil {
options = api.NewDeleteOptions(0)
}
if options.Preconditions == nil {
options.Preconditions = &api.Preconditions{}
}
if options.Preconditions.UID == nil {
options.Preconditions.UID = &namespace.UID
} else if *options.Preconditions.UID != namespace.UID {
err = apierrors.NewConflict(
api.Resource("namespaces"),
name,
fmt.Errorf("Precondition failed: UID in precondition: %v, UID in object meta: %v", *options.Preconditions.UID, namespace.UID),
)
return nil, err
}
// upon first request to delete, we switch the phase to start namespace termination
// TODO: enhance graceful deletion's calls to DeleteStrategy to allow phase change and finalizer patterns
if namespace.DeletionTimestamp.IsZero() {
key, err := r.Store.KeyFunc(ctx, name)
if err != nil {
return nil, err
}
preconditions := storage.Preconditions{UID: options.Preconditions.UID}
out := r.Store.NewFunc()
err = r.Store.Storage.GuaranteedUpdate(
ctx, key, out, false, &preconditions,
storage.SimpleUpdate(func(existing runtime.Object) (runtime.Object, error) {
existingNamespace, ok := existing.(*api.Namespace)
if !ok {
// wrong type
return nil, fmt.Errorf("expected *api.Namespace, got %v", existing)
}
// Set the deletion timestamp if needed
if existingNamespace.DeletionTimestamp.IsZero() {
now := metav1.Now()
existingNamespace.DeletionTimestamp = &now
}
// Set the namespace phase to terminating, if needed
if existingNamespace.Status.Phase != api.NamespaceTerminating {
existingNamespace.Status.Phase = api.NamespaceTerminating
}
// Remove orphan finalizer if options.OrphanDependents = false.
if options.OrphanDependents != nil && *options.OrphanDependents == false {
// remove Orphan finalizer.
newFinalizers := []string{}
for i := range existingNamespace.ObjectMeta.Finalizers {
finalizer := existingNamespace.ObjectMeta.Finalizers[i]
if string(finalizer) != api.FinalizerOrphan {
newFinalizers = append(newFinalizers, finalizer)
}
}
existingNamespace.ObjectMeta.Finalizers = newFinalizers
}
return existingNamespace, nil
}),
)
if err != nil {
err = storageerr.InterpretGetError(err, api.Resource("namespaces"), name)
err = storageerr.InterpretUpdateError(err, api.Resource("namespaces"), name)
if _, ok := err.(*apierrors.StatusError); !ok {
err = apierrors.NewInternalError(err)
}
return nil, err
}
return out, nil
}
// prior to final deletion, we must ensure that finalizers is empty
if len(namespace.Spec.Finalizers) != 0 {
err = apierrors.NewConflict(api.Resource("namespaces"), namespace.Name, fmt.Errorf("The system is ensuring all content is removed from this namespace. Upon completion, this namespace will automatically be purged by the system."))
return nil, err
}
return r.Store.Delete(ctx, name, options)
}
// 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
})
}
