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Merge pull request #91690 from apelisse/ignore-failures

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fieldManager: Ignore and log all errors when updating managedFields
This commit is contained in:
Kubernetes Prow Robot 2020-06-04 17:59:59 -07:00 committed by GitHub
commit d585527c70
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7 changed files with 193 additions and 29 deletions
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5
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/create.go
View File

@ -156,10 +156,7 @@ func createHandler(r rest.NamedCreater, scope *RequestScope, admit admission.Int
if err != nil {
return nil, fmt.Errorf("failed to create new object (Create for %v): %v", scope.Kind, err)
}
obj, err = scope.FieldManager.Update(liveObj, obj, managerOrUserAgent(options.FieldManager, req.UserAgent()))
if err != nil {
return nil, fmt.Errorf("failed to update object (Create for %v) managed fields: %v", scope.Kind, err)
}
obj = scope.FieldManager.UpdateNoErrors(liveObj, obj, managerOrUserAgent(options.FieldManager, req.UserAgent()))
}
if mutatingAdmission, ok := admit.(admission.MutationInterface); ok && mutatingAdmission.Handles(admission.Create) {
if err := mutatingAdmission.Admit(ctx, admissionAttributes, scope); err != nil {

27
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager.go
View File

@ -18,12 +18,14 @@ package fieldmanager
import (
"fmt"
"time"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal"
"k8s.io/klog/v2"
openapiproto "k8s.io/kube-openapi/pkg/util/proto"
"sigs.k8s.io/structured-merge-diff/v3/fieldpath"
)
@ -37,6 +39,8 @@ const DefaultMaxUpdateManagers int = 10
// starts being tracked from the object's creation, instead of from the first time the object is applied to.
const DefaultTrackOnCreateProbability float32 = 1
var atMostEverySecond = internal.NewAtMostEvery(time.Second)
// Managed groups a fieldpath.ManagedFields together with the timestamps associated with each operation.
type Managed interface {
// Fields gets the fieldpath.ManagedFields.
@ -120,7 +124,9 @@ func (f *FieldManager) Update(liveObj, newObj runtime.Object, manager string) (o
// don't understand managedFields from deleting it accidentally.
managed, err = internal.DecodeObjectManagedFields(liveObj)
if err != nil {
return nil, fmt.Errorf("failed to decode managed fields: %v", err)
// If we also can't decode the liveObject, then
// just restart managedFields from scratch.
managed = internal.NewEmptyManaged()
}
}
@ -138,6 +144,25 @@ func (f *FieldManager) Update(liveObj, newObj runtime.Object, manager string) (o
return object, nil
}
// UpdateNoErrors is the same as Update, but it will not return
// errors. If an error happens, the object is returned with
// managedFields cleared.
func (f *FieldManager) UpdateNoErrors(liveObj, newObj runtime.Object, manager string) runtime.Object {
obj, err := f.Update(liveObj, newObj, manager)
if err != nil {
atMostEverySecond.Do(func() {
klog.Errorf("[SHOULD NOT HAPPEN] failed to update managedFields for %v: %v",
newObj.GetObjectKind().GroupVersionKind(),
err)
})
// Explicitly remove managedFields on failure, so that
// we can't have garbage in it.
internal.RemoveObjectManagedFields(newObj)
return newObj
}
return obj
}
// Apply is used when server-side apply is called, as it merges the
// object and updates the managed fields.
func (f *FieldManager) Apply(liveObj, appliedObj runtime.Object, manager string, force bool) (object runtime.Object, err error) {

5
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/managedfields.go
View File

@ -53,6 +53,11 @@ func (m *managedStruct) Times() map[string]*metav1.Time {
return m.times
}
// NewEmptyManaged creates an empty ManagedInterface.
func NewEmptyManaged() ManagedInterface {
return NewManaged(fieldpath.ManagedFields{}, map[string]*metav1.Time{})
}
// NewManaged creates a ManagedInterface from a fieldpath.ManagedFields and the timestamps associated with each operation.
func NewManaged(f fieldpath.ManagedFields, t map[string]*metav1.Time) ManagedInterface {
return &managedStruct{

15
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/structuredmerge.go
View File

@ -18,14 +18,12 @@ package fieldmanager
import (
"fmt"
"time"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal"
"k8s.io/klog/v2"
openapiproto "k8s.io/kube-openapi/pkg/util/proto"
"sigs.k8s.io/structured-merge-diff/v3/fieldpath"
"sigs.k8s.io/structured-merge-diff/v3/merge"
@ -41,7 +39,6 @@ type structuredMergeManager struct {
}
var _ Manager = &structuredMergeManager{}
var atMostEverySecond = internal.NewAtMostEvery(time.Second)
// NewStructuredMergeManager creates a new Manager that merges apply requests
// and update managed fields for other types of requests.
@ -98,19 +95,11 @@ func (f *structuredMergeManager) Update(liveObj, newObj runtime.Object, managed
}
newObjTyped, err := f.typeConverter.ObjectToTyped(newObjVersioned)
if err != nil {
// Return newObj and just by-pass fields update. This really shouldn't happen.
atMostEverySecond.Do(func() {
klog.Errorf("[SHOULD NOT HAPPEN] failed to create typed new object of type %v: %v", newObjVersioned.GetObjectKind().GroupVersionKind(), err)
})
return newObj, managed, nil
return nil, nil, fmt.Errorf("failed to convert new object (%v) to smd typed: %v", newObjVersioned.GetObjectKind().GroupVersionKind(), err)
}
liveObjTyped, err := f.typeConverter.ObjectToTyped(liveObjVersioned)
if err != nil {
// Return newObj and just by-pass fields update. This really shouldn't happen.
atMostEverySecond.Do(func() {
klog.Errorf("[SHOULD NOT HAPPEN] failed to create typed live object of type %v: %v", liveObjVersioned.GetObjectKind().GroupVersionKind(), err)
})
return newObj, managed, nil
return nil, nil, fmt.Errorf("failed to convert live object (%v) to smd typed: %v", liveObjVersioned.GetObjectKind().GroupVersionKind(), err)
}
apiVersion := fieldpath.APIVersion(f.groupVersion.String())

8
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/patch.go
View File

@ -323,9 +323,7 @@ func (p *jsonPatcher) applyPatchToCurrentObject(currentObject runtime.Object) (r
}
if p.fieldManager != nil {
if objToUpdate, err = p.fieldManager.Update(currentObject, objToUpdate, managerOrUserAgent(p.options.FieldManager, p.userAgent)); err != nil {
return nil, fmt.Errorf("failed to update object (json PATCH for %v) managed fields: %v", p.kind, err)
}
objToUpdate = p.fieldManager.UpdateNoErrors(currentObject, objToUpdate, managerOrUserAgent(p.options.FieldManager, p.userAgent))
}
return objToUpdate, nil
}
@ -408,9 +406,7 @@ func (p *smpPatcher) applyPatchToCurrentObject(currentObject runtime.Object) (ru
}
if p.fieldManager != nil {
if newObj, err = p.fieldManager.Update(currentObject, newObj, managerOrUserAgent(p.options.FieldManager, p.userAgent)); err != nil {
return nil, fmt.Errorf("failed to update object (smp PATCH for %v) managed fields: %v", p.kind, err)
}
newObj = p.fieldManager.UpdateNoErrors(currentObject, newObj, managerOrUserAgent(p.options.FieldManager, p.userAgent))
}
return newObj, nil
}

6
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/update.go
View File

@ -131,11 +131,7 @@ func UpdateResource(r rest.Updater, scope *RequestScope, admit admission.Interfa
if scope.FieldManager != nil {
transformers = append(transformers, func(_ context.Context, newObj, liveObj runtime.Object) (runtime.Object, error) {
if shouldUpdateManagedFields {
obj, err := scope.FieldManager.Update(liveObj, newObj, managerOrUserAgent(options.FieldManager, req.UserAgent()))
if err != nil {
return nil, fmt.Errorf("failed to update object (Update for %v) managed fields: %v", scope.Kind, err)
}
return obj, nil
return scope.FieldManager.UpdateNoErrors(liveObj, newObj, managerOrUserAgent(options.FieldManager, req.UserAgent())), nil
}
return newObj, nil
})

156
test/integration/apiserver/apply/apply_test.go
View File

@ -1422,6 +1422,162 @@ func TestClearManagedFieldsWithUpdate(t *testing.T) {
}
}
// TestErrorsDontFail
func TestErrorsDontFail(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, genericfeatures.ServerSideApply, true)()
_, client, closeFn := setup(t)
defer closeFn()
// Tries to create with a managed fields that has an empty `fieldsType`.
_, err := client.CoreV1().RESTClient().Post().
Namespace("default").
Resource("configmaps").
Param("fieldManager", "apply_test").
Body([]byte(`{
"apiVersion": "v1",
"kind": "ConfigMap",
"metadata": {
"name": "test-cm",
"namespace": "default",
"managedFields": [{
"manager": "apply_test",
"operation": "Apply",
"apiVersion": "v1",
"time": "2019-07-08T09:31:18Z",
"fieldsType": "",
"fieldsV1": {}
}],
"labels": {
"test-label": "test"
}
},
"data": {
"key": "value"
}
}`)).
Do(context.TODO()).
Get()
if err != nil {
t.Fatalf("Failed to create object with empty fieldsType: %v", err)
}
}
func TestErrorsDontFailUpdate(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, genericfeatures.ServerSideApply, true)()
_, client, closeFn := setup(t)
defer closeFn()
_, err := client.CoreV1().RESTClient().Post().
Namespace("default").
Resource("configmaps").
Param("fieldManager", "apply_test").
Body([]byte(`{
"apiVersion": "v1",
"kind": "ConfigMap",
"metadata": {
"name": "test-cm",
"namespace": "default",
"labels": {
"test-label": "test"
}
},
"data": {
"key": "value"
}
}`)).
Do(context.TODO()).
Get()
if err != nil {
t.Fatalf("Failed to create object: %v", err)
}
_, err = client.CoreV1().RESTClient().Put().
Namespace("default").
Resource("configmaps").
Name("test-cm").
Param("fieldManager", "apply_test").
Body([]byte(`{
"apiVersion": "v1",
"kind": "ConfigMap",
"metadata": {
"name": "test-cm",
"namespace": "default",
"managedFields": [{
"manager": "apply_test",
"operation": "Apply",
"apiVersion": "v1",
"time": "2019-07-08T09:31:18Z",
"fieldsType": "",
"fieldsV1": {}
}],
"labels": {
"test-label": "test"
}
},
"data": {
"key": "value"
}
}`)).
Do(context.TODO()).
Get()
if err != nil {
t.Fatalf("Failed to update object with empty fieldsType: %v", err)
}
}
func TestErrorsDontFailPatch(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, genericfeatures.ServerSideApply, true)()
_, client, closeFn := setup(t)
defer closeFn()
_, err := client.CoreV1().RESTClient().Post().
Namespace("default").
Resource("configmaps").
Param("fieldManager", "apply_test").
Body([]byte(`{
"apiVersion": "v1",
"kind": "ConfigMap",
"metadata": {
"name": "test-cm",
"namespace": "default",
"labels": {
"test-label": "test"
}
},
"data": {
"key": "value"
}
}`)).
Do(context.TODO()).
Get()
if err != nil {
t.Fatalf("Failed to create object: %v", err)
}
_, err = client.CoreV1().RESTClient().Patch(types.JSONPatchType).
Namespace("default").
Resource("configmaps").
Name("test-cm").
Param("fieldManager", "apply_test").
Body([]byte(`[{"op": "replace", "path": "/metadata/managedFields", "value": [{
"manager": "apply_test",
"operation": "Apply",
"apiVersion": "v1",
"time": "2019-07-08T09:31:18Z",
"fieldsType": "",
"fieldsV1": {}
}]}]`)).
Do(context.TODO()).
Get()
if err != nil {
t.Fatalf("Failed to patch object with empty FieldsType: %v", err)
}
}
var podBytes = []byte(`
apiVersion: v1
kind: Pod