Golang rest.BeforeCreate函數代碼示例

func (m *VirtualStorage) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {
	if err := rest.BeforeCreate(m.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}

	role := obj.(*authorizationapi.Role)

	policy, err := m.EnsurePolicy(ctx)
	if err != nil {
		return nil, err
	}
	if _, exists := policy.Roles[role.Name]; exists {
		return nil, kapierrors.NewAlreadyExists("Role", role.Name)
	}

	role.ResourceVersion = policy.ResourceVersion
	policy.Roles[role.Name] = role
	policy.LastModified = util.Now()

	if err := m.PolicyStorage.UpdatePolicy(ctx, policy); err != nil {
		return nil, err
	}

	return role, nil
}

// Create inserts a new item according to the unique key from the object.
func (e *Store) Create(ctx api.Context, obj runtime.Object) (runtime.Object, error) {
	if err := rest.BeforeCreate(e.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}
	name, err := e.ObjectNameFunc(obj)
	if err != nil {
		return nil, err
	}
	key, err := e.KeyFunc(ctx, name)
	if err != nil {
		return nil, err
	}
	ttl, err := e.calculateTTL(obj, 0, false)
	if err != nil {
		return nil, err
	}
	out := e.NewFunc()
	if err := e.Storage.Create(ctx, key, obj, out, ttl); err != nil {
		err = storeerr.InterpretCreateError(err, e.QualifiedResource, name)
		err = rest.CheckGeneratedNameError(e.CreateStrategy, err, obj)
		return nil, err
	}
	if e.AfterCreate != nil {
		if err := e.AfterCreate(out); err != nil {
			return nil, err
		}
	}
	if e.Decorator != nil {
		if err := e.Decorator(obj); err != nil {
			return nil, err
		}
	}
	return out, nil
}

// Create instantiates a new build from a build configuration
func (s *InstantiateREST) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {
	if err := rest.BeforeCreate(Strategy, ctx, obj); err != nil {
		return nil, err
	}

	return s.generator.Instantiate(ctx, obj.(*buildapi.BuildRequest))
}

// CreateMasterServiceIfNeeded will create the specified service if it
// doesn't already exist.
func (c *Controller) CreateMasterServiceIfNeeded(serviceName string, serviceIP net.IP, servicePort, nodePort int) error {
	ctx := api.NewDefaultContext()
	if _, err := c.ServiceRegistry.GetService(ctx, serviceName); err == nil {
		// The service already exists.
		return nil
	}

	ports, serviceType := createPortAndServiceSpec(servicePort, nodePort)
	svc := &api.Service{
		ObjectMeta: api.ObjectMeta{
			Name:      serviceName,
			Namespace: api.NamespaceDefault,
			Labels:    map[string]string{"provider": "kubernetes", "component": "apiserver"},
		},
		Spec: api.ServiceSpec{
			Ports: ports,
			// maintained by this code, not by the pod selector
			Selector:        nil,
			ClusterIP:       serviceIP.String(),
			SessionAffinity: api.ServiceAffinityNone,
			Type:            serviceType,
		},
	}
	if err := rest.BeforeCreate(rest.Services, ctx, svc); err != nil {
		return err
	}

	_, err := c.ServiceRegistry.CreateService(ctx, svc)
	if err != nil && errors.IsAlreadyExists(err) {
		err = nil
	}
	return err
}

func (m *VirtualStorage) createRole(ctx kapi.Context, obj runtime.Object, allowEscalation bool) (*authorizationapi.Role, error) {
	if err := rest.BeforeCreate(m.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}

	role := obj.(*authorizationapi.Role)
	if !allowEscalation {
		if err := rulevalidation.ConfirmNoEscalation(ctx, authorizationapi.Resource("role"), role.Name, m.RuleResolver, authorizationinterfaces.NewLocalRoleAdapter(role)); err != nil {
			return nil, err
		}
	}

	policy, err := m.EnsurePolicy(ctx)
	if err != nil {
		return nil, err
	}
	if _, exists := policy.Roles[role.Name]; exists {
		return nil, kapierrors.NewAlreadyExists(authorizationapi.Resource("role"), role.Name)
	}

	role.ResourceVersion = policy.ResourceVersion
	policy.Roles[role.Name] = role
	policy.LastModified = unversioned.Now()

	if err := m.PolicyStorage.UpdatePolicy(ctx, policy); err != nil {
		return nil, err
	}

	return role, nil
}

func (r *REST) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {
	istag, ok := obj.(*imageapi.ImageStreamTag)
	if !ok {
		return nil, kapierrors.NewBadRequest(fmt.Sprintf("obj is not an ImageStreamTag: %#v", obj))
	}
	if err := rest.BeforeCreate(Strategy, ctx, obj); err != nil {
		return nil, err
	}
	namespace, ok := kapi.NamespaceFrom(ctx)
	if !ok {
		return nil, kapierrors.NewBadRequest("a namespace must be specified to import images")
	}

	imageStreamName, imageTag, ok := imageapi.SplitImageStreamTag(istag.Name)
	if !ok {
		return nil, fmt.Errorf("%q must be of the form <stream_name>:<tag>", istag.Name)
	}

	target, err := r.imageStreamRegistry.GetImageStream(ctx, imageStreamName)
	if err != nil {
		if !kapierrors.IsNotFound(err) {
			return nil, err
		}

		// try to create the target if it doesn't exist
		target = &imageapi.ImageStream{
			ObjectMeta: kapi.ObjectMeta{
				Name:      imageStreamName,
				Namespace: namespace,
			},
		}
	}

	if target.Spec.Tags == nil {
		target.Spec.Tags = make(map[string]imageapi.TagReference)
	}

	// The user wants to symlink a tag.
	_, exists := target.Spec.Tags[imageTag]
	if exists {
		return nil, kapierrors.NewAlreadyExists(imageapi.Resource("imagestreamtag"), istag.Name)
	}
	target.Spec.Tags[imageTag] = *istag.Tag

	// Check the stream creation timestamp and make sure we will not
	// create a new image stream while deleting.
	if target.CreationTimestamp.IsZero() {
		_, err = r.imageStreamRegistry.CreateImageStream(ctx, target)
	} else {
		_, err = r.imageStreamRegistry.UpdateImageStream(ctx, target)
	}
	if err != nil {
		return nil, err
	}

	return istag, nil
}

// Create inserts a new item according to the unique key from the object.
func (e *Store) Create(ctx api.Context, obj runtime.Object) (runtime.Object, error) {
	if err := rest.BeforeCreate(e.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}
	name, err := e.ObjectNameFunc(obj)
	if err != nil {
		return nil, err
	}
	key, err := e.KeyFunc(ctx, name)
	if err != nil {
		return nil, err
	}
	ttl, err := e.calculateTTL(obj, 0, false)
	if err != nil {
		return nil, err
	}
	out := e.NewFunc()
	if err := e.Storage.Create(ctx, key, obj, out, ttl); err != nil {
		err = storeerr.InterpretCreateError(err, e.QualifiedResource, name)
		err = rest.CheckGeneratedNameError(e.CreateStrategy, err, obj)
		if !kubeerr.IsAlreadyExists(err) {
			return nil, err
		}
		if errGet := e.Storage.Get(ctx, key, out, false); errGet != nil {
			return nil, err
		}
		accessor, errGetAcc := meta.Accessor(out)
		if errGetAcc != nil {
			return nil, err
		}
		if accessor.GetDeletionTimestamp() != nil {
			msg := &err.(*kubeerr.StatusError).ErrStatus.Message
			*msg = fmt.Sprintf("object is being deleted: %s", *msg)
			// TODO: remove this block after 1.6
			userAgent, _ := api.UserAgentFrom(ctx)
			if !isOldKubectl(userAgent) {
				return nil, err
			}
			if e.QualifiedResource.Resource != "replicationcontrollers" {
				return nil, err
			}
			*msg = fmt.Sprintf("%s: if you're using \"kubectl rolling-update\" with kubectl version older than v1.4.0, your rolling update has failed, though the pods are correctly updated. Please see https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#kubectl-rolling-update for a workaround", *msg)
		}
		return nil, err
	}
	if e.AfterCreate != nil {
		if err := e.AfterCreate(out); err != nil {
			return nil, err
		}
	}
	if e.Decorator != nil {
		if err := e.Decorator(obj); err != nil {
			return nil, err
		}
	}
	return out, nil
}

// Create inserts a new item according to the unique key from the object.
func (e *Store) Create(ctx api.Context, obj runtime.Object) (runtime.Object, error) {
	if err := rest.BeforeCreate(e.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}
	name, err := e.ObjectNameFunc(obj)
	if err != nil {
		return nil, err
	}
	key, err := e.KeyFunc(ctx, name)
	if err != nil {
		return nil, err
	}
	ttl, err := e.calculateTTL(obj, 0, false)
	if err != nil {
		return nil, err
	}
	out := e.NewFunc()
	if err := e.Storage.Create(ctx, key, obj, out, ttl); err != nil {
		err = storeerr.InterpretCreateError(err, e.QualifiedResource, name)
		err = rest.CheckGeneratedNameError(e.CreateStrategy, err, obj)
		if !kubeerr.IsAlreadyExists(err) {
			return nil, err
		}
		if errGet := e.Storage.Get(ctx, key, out, false); errGet != nil {
			return nil, err
		}
		accessor, errGetAcc := meta.Accessor(out)
		if errGetAcc != nil {
			return nil, err
		}
		if accessor.GetDeletionTimestamp() != nil {
			msg := &err.(*kubeerr.StatusError).ErrStatus.Message
			*msg = fmt.Sprintf("object is being deleted: %s", *msg)
		}
		return nil, err
	}
	if e.AfterCreate != nil {
		if err := e.AfterCreate(out); err != nil {
			return nil, err
		}
	}
	if e.Decorator != nil {
		if err := e.Decorator(obj); err != nil {
			return nil, err
		}
	}
	return out, nil
}

// Create instantiates a new build from a build configuration
func (s *InstantiateREST) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {
	if err := rest.BeforeCreate(Strategy, ctx, obj); err != nil {
		return nil, err
	}

	request := obj.(*buildapi.BuildRequest)
	if request.TriggeredBy == nil {
		buildTriggerCauses := []buildapi.BuildTriggerCause{}
		request.TriggeredBy = append(buildTriggerCauses,
			buildapi.BuildTriggerCause{
				Message: buildapi.BuildTriggerCauseManualMsg,
			},
		)
	}
	return s.generator.Instantiate(ctx, request)
}

func (m *VirtualStorage) createRoleBinding(ctx kapi.Context, obj runtime.Object, allowEscalation bool) (*authorizationapi.RoleBinding, error) {
	// Copy object before passing to BeforeCreate, since it mutates
	objCopy, err := kapi.Scheme.DeepCopy(obj)
	if err != nil {
		return nil, err
	}
	obj = objCopy.(runtime.Object)

	if err := rest.BeforeCreate(m.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}

	roleBinding := obj.(*authorizationapi.RoleBinding)

	if !allowEscalation {
		if err := m.confirmNoEscalation(ctx, roleBinding); err != nil {
			return nil, err
		}
	}

	// Retry if we hit a conflict on the underlying PolicyBinding object
	if err := kclient.RetryOnConflict(kclient.DefaultRetry, func() error {
		policyBinding, err := m.getPolicyBindingForPolicy(ctx, roleBinding.RoleRef.Namespace, allowEscalation)
		if err != nil {
			return err
		}

		_, exists := policyBinding.RoleBindings[roleBinding.Name]
		if exists {
			return kapierrors.NewAlreadyExists(authorizationapi.Resource("rolebinding"), roleBinding.Name)
		}

		roleBinding.ResourceVersion = policyBinding.ResourceVersion
		policyBinding.RoleBindings[roleBinding.Name] = roleBinding
		policyBinding.LastModified = unversioned.Now()

		return m.BindingRegistry.UpdatePolicyBinding(ctx, policyBinding)
	}); err != nil {
		return nil, err
	}

	return roleBinding, nil
}

// Create registers a new image (if it doesn't exist) and updates the specified ImageStream's tags.
func (s *REST) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {
	if err := rest.BeforeCreate(Strategy, ctx, obj); err != nil {
		return nil, err
	}

	mapping := obj.(*api.ImageStreamMapping)

	stream, err := s.findStreamForMapping(ctx, mapping)
	if err != nil {
		return nil, err
	}

	image := mapping.Image
	tag := mapping.Tag
	if len(tag) == 0 {
		tag = api.DefaultImageTag
	}

	if err := s.imageRegistry.CreateImage(ctx, &image); err != nil && !errors.IsAlreadyExists(err) {
		return nil, err
	}

	next := api.TagEvent{
		Created:              util.Now(),
		DockerImageReference: image.DockerImageReference,
		Image:                image.Name,
	}

	if !api.AddTagEventToImageStream(stream, tag, next) {
		// nothing actually changed
		return &kapi.Status{Status: kapi.StatusSuccess}, nil
	}

	api.UpdateTrackingTags(stream, tag, next)

	if _, err := s.imageStreamRegistry.UpdateImageStreamStatus(ctx, stream); err != nil {
		return nil, err
	}

	return &kapi.Status{Status: kapi.StatusSuccess}, nil
}

// CreateWithName inserts a new item with the provided name
// DEPRECATED: use Create instead
func (e *Etcd) CreateWithName(ctx api.Context, name string, obj runtime.Object) error {
	key, err := e.KeyFunc(ctx, name)
	if err != nil {
		return err
	}
	if e.CreateStrategy != nil {
		if err := rest.BeforeCreate(e.CreateStrategy, ctx, obj); err != nil {
			return err
		}
	}
	ttl, err := e.calculateTTL(obj, 0, false)
	if err != nil {
		return err
	}
	err = e.Storage.Create(key, obj, nil, ttl)
	err = etcderr.InterpretCreateError(err, e.EndpointName, name)
	if err == nil && e.Decorator != nil {
		err = e.Decorator(obj)
	}
	return err
}

func (m *VirtualStorage) createRole(ctx kapi.Context, obj runtime.Object, allowEscalation bool) (*authorizationapi.Role, error) {
	// Copy object before passing to BeforeCreate, since it mutates
	objCopy, err := kapi.Scheme.DeepCopy(obj)
	if err != nil {
		return nil, err
	}
	obj = objCopy.(runtime.Object)

	if err := rest.BeforeCreate(m.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}

	role := obj.(*authorizationapi.Role)
	if !allowEscalation {
		if err := rulevalidation.ConfirmNoEscalation(ctx, m.Resource, role.Name, m.RuleResolver, m.CachedRuleResolver, authorizationinterfaces.NewLocalRoleAdapter(role)); err != nil {
			return nil, err
		}
	}

	if err := kclient.RetryOnConflict(kclient.DefaultRetry, func() error {
		policy, err := m.EnsurePolicy(ctx)
		if err != nil {
			return err
		}
		if _, exists := policy.Roles[role.Name]; exists {
			return kapierrors.NewAlreadyExists(m.Resource, role.Name)
		}

		role.ResourceVersion = policy.ResourceVersion
		policy.Roles[role.Name] = role
		policy.LastModified = unversioned.Now()

		return m.PolicyStorage.UpdatePolicy(ctx, policy)
	}); err != nil {
		return nil, err
	}

	return role, nil
}

// CreateMasterServiceIfNeeded will create the specified service if it
// doesn't already exist.
func (c *Controller) CreateOrUpdateMasterServiceIfNeeded(serviceName string, serviceIP net.IP, servicePorts []api.ServicePort, serviceType api.ServiceType, reconcile bool) error {
	ctx := api.NewDefaultContext()
	if s, err := c.ServiceRegistry.GetService(ctx, serviceName); err == nil {
		// The service already exists.
		if reconcile {
			if svc, updated := getMasterServiceUpdateIfNeeded(s, servicePorts, serviceType); updated {
				glog.Warningf("Resetting master service %q to %#v", serviceName, svc)
				_, err := c.ServiceRegistry.UpdateService(ctx, svc)
				return err
			}
		}
		return nil
	}
	svc := &api.Service{
		ObjectMeta: api.ObjectMeta{
			Name:      serviceName,
			Namespace: api.NamespaceDefault,
			Labels:    map[string]string{"provider": "kubernetes", "component": "apiserver"},
		},
		Spec: api.ServiceSpec{
			Ports: servicePorts,
			// maintained by this code, not by the pod selector
			Selector:        nil,
			ClusterIP:       serviceIP.String(),
			SessionAffinity: api.ServiceAffinityNone,
			Type:            serviceType,
		},
	}

	if err := rest.BeforeCreate(rest.Services, ctx, svc); err != nil {
		return err
	}

	_, err := c.ServiceRegistry.CreateService(ctx, svc)
	if err != nil && errors.IsAlreadyExists(err) {
		err = nil
	}
	return err
}

// Create inserts a new item according to the unique key from the object.
func (e *Etcd) Create(ctx api.Context, obj runtime.Object) (runtime.Object, error) {
	trace := util.NewTrace("Create " + reflect.TypeOf(obj).String())
	defer trace.LogIfLong(time.Second)
	if err := rest.BeforeCreate(e.CreateStrategy, ctx, obj); err != nil {
		return nil, err
	}
	name, err := e.ObjectNameFunc(obj)
	if err != nil {
		return nil, err
	}
	key, err := e.KeyFunc(ctx, name)
	if err != nil {
		return nil, err
	}
	ttl, err := e.calculateTTL(obj, 0, false)
	if err != nil {
		return nil, err
	}
	trace.Step("About to create object")
	out := e.NewFunc()
	if err := e.Storage.Create(ctx, key, obj, out, ttl); err != nil {
		err = etcderr.InterpretCreateError(err, e.EndpointName, name)
		err = rest.CheckGeneratedNameError(e.CreateStrategy, err, obj)
		return nil, err
	}
	trace.Step("Object created")
	if e.AfterCreate != nil {
		if err := e.AfterCreate(out); err != nil {
			return nil, err
		}
	}
	if e.Decorator != nil {
		if err := e.Decorator(obj); err != nil {
			return nil, err
		}
	}
	return out, nil
}