Example #1
0
// 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
}
Example #2
0
// TODO: This should be done on types that are not part of our API
func TestBeforeUpdate(t *testing.T) {
	testCases := []struct {
		name      string
		tweakSvc  func(oldSvc, newSvc *api.Service) // given basic valid services, each test case can customize them
		expectErr bool
	}{
		{
			name: "no change",
			tweakSvc: func(oldSvc, newSvc *api.Service) {
				// nothing
			},
			expectErr: false,
		},
		{
			name: "change port",
			tweakSvc: func(oldSvc, newSvc *api.Service) {
				newSvc.Spec.Ports[0].Port++
			},
			expectErr: false,
		},
		{
			name: "bad namespace",
			tweakSvc: func(oldSvc, newSvc *api.Service) {
				newSvc.Namespace = "#$%%invalid"
			},
			expectErr: true,
		},
		{
			name: "change name",
			tweakSvc: func(oldSvc, newSvc *api.Service) {
				newSvc.Name += "2"
			},
			expectErr: true,
		},
		{
			name: "change ClusterIP",
			tweakSvc: func(oldSvc, newSvc *api.Service) {
				oldSvc.Spec.ClusterIP = "1.2.3.4"
				newSvc.Spec.ClusterIP = "4.3.2.1"
			},
			expectErr: true,
		},
		{
			name: "change selectpor",
			tweakSvc: func(oldSvc, newSvc *api.Service) {
				newSvc.Spec.Selector = map[string]string{"newkey": "newvalue"}
			},
			expectErr: false,
		},
	}

	for _, tc := range testCases {
		oldSvc := makeValidService()
		newSvc := makeValidService()
		tc.tweakSvc(&oldSvc, &newSvc)
		ctx := genericapirequest.NewDefaultContext()
		err := rest.BeforeUpdate(Strategy, ctx, runtime.Object(&oldSvc), runtime.Object(&newSvc))
		if tc.expectErr && err == nil {
			t.Errorf("unexpected non-error for %q", tc.name)
		}
		if !tc.expectErr && err != nil {
			t.Errorf("unexpected error for %q: %v", tc.name, err)
		}
	}
}