// NewNotFound is a utility function to return a well-formatted admission control error response
func NewNotFound(a Attributes) error {
name, resource, err := extractResourceName(a)
if err != nil {
return apierrors.NewInternalError(err)
}
return apierrors.NewNotFound(resource, name)
}
// existingController verifies if the controller already exists
func (r *RollingUpdater) existingController(controller *api.ReplicationController) (*api.ReplicationController, error) {
// without rc name but generate name, there's no existing rc
if len(controller.Name) == 0 && len(controller.GenerateName) > 0 {
return nil, errors.NewNotFound(api.Resource("replicationcontrollers"), controller.Name)
}
// controller name is required to get rc back
return r.c.ReplicationControllers(controller.Namespace).Get(controller.Name)
}
// InterpretGetError converts a generic error on a retrieval
// operation into the appropriate API error.
func InterpretGetError(err error, qualifiedResource unversioned.GroupResource, name string) error {
switch {
case storage.IsNotFound(err):
return errors.NewNotFound(qualifiedResource, name)
case storage.IsUnreachable(err):
return errors.NewServerTimeout(qualifiedResource, "get", 2) // TODO: make configurable or handled at a higher level
default:
return err
}
}
func (r *ScaleREST) Get(ctx api.Context, name string) (runtime.Object, error) {
deployment, err := r.registry.GetDeployment(ctx, name)
if err != nil {
return nil, errors.NewNotFound(extensions.Resource("deployments/scale"), name)
}
scale, err := scaleFromDeployment(deployment)
if err != nil {
return nil, errors.NewBadRequest(fmt.Sprintf("%v", err))
}
return scale, nil
}
func TestSyncBatchIgnoresNotFound(t *testing.T) {
client := fake.Clientset{}
syncer := newTestManager(&client)
client.AddReactor("get", "pods", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, errors.NewNotFound(api.Resource("pods"), "test-pod")
})
syncer.SetPodStatus(getTestPod(), getRandomPodStatus())
syncer.testSyncBatch()
verifyActions(t, syncer.kubeClient, []core.Action{
core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: unversioned.GroupVersionResource{Resource: "pods"}}},
})
}
func (r *NodeRegistry) GetNode(ctx api.Context, nodeID string) (*api.Node, error) {
r.Lock()
defer r.Unlock()
if r.Err != nil {
return nil, r.Err
}
for _, node := range r.Nodes.Items {
if node.Name == nodeID {
return &node, nil
}
}
return nil, errors.NewNotFound(api.Resource("nodes"), nodeID)
}
// InterpretDeleteError converts a generic error on a delete
// operation into the appropriate API error.
func InterpretDeleteError(err error, qualifiedResource unversioned.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.IsTestFailed(err), storage.IsNodeExist(err):
return errors.NewConflict(qualifiedResource, name, err)
case storage.IsInternalError(err):
return errors.NewInternalError(err)
default:
return err
}
}
func TestCheckGeneratedNameError(t *testing.T) {
expect := errors.NewNotFound(api.Resource("foos"), "bar")
if err := rest.CheckGeneratedNameError(Strategy, expect, &api.Pod{}); err != expect {
t.Errorf("NotFoundError should be ignored: %v", err)
}
expect = errors.NewAlreadyExists(api.Resource("foos"), "bar")
if err := rest.CheckGeneratedNameError(Strategy, expect, &api.Pod{}); err != expect {
t.Errorf("AlreadyExists should be returned when no GenerateName field: %v", err)
}
expect = errors.NewAlreadyExists(api.Resource("foos"), "bar")
if err := rest.CheckGeneratedNameError(Strategy, expect, &api.Pod{ObjectMeta: api.ObjectMeta{GenerateName: "foo"}}); err == nil || !errors.IsServerTimeout(err) {
t.Errorf("expected try again later error: %v", err)
}
}
func TestDeleteAllNotFound(t *testing.T) {
_, svc, _ := testData()
f, tf, codec := NewAPIFactory()
// Add an item to the list which will result in a 404 on delete
svc.Items = append(svc.Items, api.Service{ObjectMeta: api.ObjectMeta{Name: "foo"}})
notFoundError := &errors.NewNotFound(api.Resource("services"), "foo").ErrStatus
tf.Printer = &testPrinter{}
tf.Client = &fake.RESTClient{
Codec: codec,
Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
switch p, m := req.URL.Path, req.Method; {
case p == "/namespaces/test/services" && m == "GET":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, svc)}, nil
case p == "/namespaces/test/services/foo" && m == "DELETE":
return &http.Response{StatusCode: 404, Header: defaultHeader(), Body: objBody(codec, notFoundError)}, nil
case p == "/namespaces/test/services/baz" && m == "DELETE":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, &svc.Items[0])}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdDelete(f, buf)
cmd.Flags().Set("all", "true")
cmd.Flags().Set("cascade", "false")
// Make sure we can explicitly choose to fail on NotFound errors, even with --all
cmd.Flags().Set("ignore-not-found", "false")
cmd.Flags().Set("output", "name")
err := RunDelete(f, buf, cmd, []string{"services"}, &DeleteOptions{})
if err == nil || !errors.IsNotFound(err) {
t.Errorf("unexpected error: expected NotFound, got %v", err)
}
}
func (r *ScaleREST) Update(ctx api.Context, name string, objInfo rest.UpdatedObjectInfo) (runtime.Object, bool, error) {
deployment, err := r.registry.GetDeployment(ctx, name)
if err != nil {
return nil, false, errors.NewNotFound(extensions.Resource("deployments/scale"), name)
}
oldScale, err := scaleFromDeployment(deployment)
if err != nil {
return nil, false, err
}
obj, err := objInfo.UpdatedObject(ctx, oldScale)
if err != nil {
return nil, false, err
}
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("expected input object type to be Scale, but %T", obj))
}
if errs := extvalidation.ValidateScale(scale); len(errs) > 0 {
return nil, false, errors.NewInvalid(extensions.Kind("Scale"), name, errs)
}
deployment.Spec.Replicas = scale.Spec.Replicas
deployment.ResourceVersion = scale.ResourceVersion
deployment, err = r.registry.UpdateDeployment(ctx, deployment)
if err != nil {
return nil, false, err
}
newScale, err := scaleFromDeployment(deployment)
if err != nil {
return nil, false, errors.NewBadRequest(fmt.Sprintf("%v", err))
}
return newScale, false, nil
}
// patchResource divides PatchResource for easier unit testing
func patchResource(
ctx api.Context,
admit updateAdmissionFunc,
timeout time.Duration,
versionedObj runtime.Object,
patcher rest.Patcher,
name string,
patchType api.PatchType,
patchJS []byte,
namer ScopeNamer,
copier runtime.ObjectCopier,
resource unversioned.GroupVersionResource,
codec runtime.Codec,
) (runtime.Object, error) {
namespace := api.NamespaceValue(ctx)
var (
originalObjJS []byte
originalPatchedObjJS []byte
lastConflictErr error
)
// applyPatch is called every time GuaranteedUpdate asks for the updated object,
// and is given the currently persisted object as input.
applyPatch := func(_ api.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 len(originalObjJS) == 0 || len(originalPatchedObjJS) == 0:
// first time through,
// 1. apply the patch
// 2. save the originalJS and patchedJS to detect whether there were conflicting changes on retries
if js, err := runtime.Encode(codec, currentObject); err != nil {
return nil, err
} else {
originalObjJS = js
}
if js, err := getPatchedJS(patchType, originalObjJS, patchJS, versionedObj); err != nil {
return nil, err
} else {
originalPatchedObjJS = js
}
objToUpdate := patcher.New()
if err := runtime.DecodeInto(codec, originalPatchedObjJS, objToUpdate); err != nil {
return nil, err
}
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
currentObjectJS, err := runtime.Encode(codec, currentObject)
if err != nil {
return nil, err
}
currentPatch, err := strategicpatch.CreateStrategicMergePatch(originalObjJS, currentObjectJS, versionedObj)
if err != nil {
return nil, err
}
originalPatch, err := strategicpatch.CreateStrategicMergePatch(originalObjJS, originalPatchedObjJS, versionedObj)
if err != nil {
return nil, err
}
diff1 := make(map[string]interface{})
if err := json.Unmarshal(originalPatch, &diff1); err != nil {
return nil, err
}
diff2 := make(map[string]interface{})
if err := json.Unmarshal(currentPatch, &diff2); err != nil {
return nil, err
}
hasConflicts, err := strategicpatch.HasConflicts(diff1, diff2)
if err != nil {
return nil, err
}
if hasConflicts {
glog.V(4).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)
}
newlyPatchedObjJS, err := getPatchedJS(api.StrategicMergePatchType, currentObjectJS, originalPatch, versionedObj)
if err != nil {
return nil, err
}
objToUpdate := patcher.New()
if err := runtime.DecodeInto(codec, newlyPatchedObjJS, objToUpdate); 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 api.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 < MaxPatchConflicts && (errors.IsConflict(updateErr)); i++ {
lastConflictErr = updateErr
updateObject, _, updateErr = patcher.Update(ctx, name, updatedObjectInfo)
}
return updateObject, updateErr
})
}
func TestSyncBatchNoDeadlock(t *testing.T) {
client := &fake.Clientset{}
m := newTestManager(client)
pod := getTestPod()
// Setup fake client.
var ret api.Pod
var err error
client.AddReactor("*", "pods", func(action core.Action) (bool, runtime.Object, error) {
switch action := action.(type) {
case core.GetAction:
assert.Equal(t, pod.Name, action.GetName(), "Unexpeted GetAction: %+v", action)
case core.UpdateAction:
assert.Equal(t, pod.Name, action.GetObject().(*api.Pod).Name, "Unexpeted UpdateAction: %+v", action)
default:
assert.Fail(t, "Unexpected Action: %+v", action)
}
return true, &ret, err
})
pod.Status.ContainerStatuses = []api.ContainerStatus{{State: api.ContainerState{Running: &api.ContainerStateRunning{}}}}
getAction := core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: unversioned.GroupVersionResource{Resource: "pods"}}}
updateAction := core.UpdateActionImpl{ActionImpl: core.ActionImpl{Verb: "update", Resource: unversioned.GroupVersionResource{Resource: "pods"}, Subresource: "status"}}
// Pod not found.
ret = *pod
err = errors.NewNotFound(api.Resource("pods"), pod.Name)
m.SetPodStatus(pod, getRandomPodStatus())
m.testSyncBatch()
verifyActions(t, client, []core.Action{getAction})
client.ClearActions()
// Pod was recreated.
ret.UID = "other_pod"
err = nil
m.SetPodStatus(pod, getRandomPodStatus())
m.testSyncBatch()
verifyActions(t, client, []core.Action{getAction})
client.ClearActions()
// Pod not deleted (success case).
ret = *pod
m.SetPodStatus(pod, getRandomPodStatus())
m.testSyncBatch()
verifyActions(t, client, []core.Action{getAction, updateAction})
client.ClearActions()
// Pod is terminated, but still running.
pod.DeletionTimestamp = new(unversioned.Time)
m.SetPodStatus(pod, getRandomPodStatus())
m.testSyncBatch()
verifyActions(t, client, []core.Action{getAction, updateAction})
client.ClearActions()
// Pod is terminated successfully.
pod.Status.ContainerStatuses[0].State.Running = nil
pod.Status.ContainerStatuses[0].State.Terminated = &api.ContainerStateTerminated{}
m.SetPodStatus(pod, getRandomPodStatus())
m.testSyncBatch()
verifyActions(t, client, []core.Action{getAction, updateAction})
client.ClearActions()
// Error case.
err = fmt.Errorf("intentional test error")
m.SetPodStatus(pod, getRandomPodStatus())
m.testSyncBatch()
verifyActions(t, client, []core.Action{getAction})
client.ClearActions()
}