generic

package
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 Go to latest Published: Jan 11, 2024 License: Apache-2.0 Imports: 23 Imported by: 1

Documentation

Overview

Package generic provides generic types and implementations for Controllers, Clients, and Caches.

Index

Constants

This section is empty.

Variables

View Source 
var ErrSkip = controller.ErrIgnore

ErrSkip notifies the caller to skip this error.

Functions

func ConfigureApplyForObject 

func ConfigureApplyForObject(apply apply.Apply, obj metav1.Object, opts *GeneratingHandlerOptions) apply.Apply

Types

type Cache 

type Cache[T runtime.Object] struct {
	// contains filtered or unexported fields
}

Cache is a object cache stored in memory for objects of type T.

func (*Cache[T]) AddIndexer 

func (c *Cache[T]) AddIndexer(indexName string, indexer Indexer[T])

AddIndexer adds a new Indexer to the cache with the provided name. If you call this after you already have data in the store, the results are undefined.

func (*Cache[T]) Get 

func (c *Cache[T]) Get(namespace, name string) (T, error)

Get returns the resources with the specified name in the given namespace from the cache.

func (*Cache[T]) GetByIndex 

func (c *Cache[T]) GetByIndex(indexName, key string) (result []T, err error)

GetByIndex returns the stored objects whose set of indexed values for the named index includes the given indexed value.

func (*Cache[T]) List 

func (c *Cache[T]) List(namespace string, selector labels.Selector) (ret []T, err error)

List will attempt to find resources in the given namespace from the Cache.

type CacheInterface 

type CacheInterface[T runtime.Object] interface {
	// Get returns the resources with the specified name in the given namespace from the cache.
	Get(namespace, name string) (T, error)

	// List will attempt to find resources in the given namespace from the Cache.
	List(namespace string, selector labels.Selector) ([]T, error)

	// AddIndexer adds  a new Indexer to the cache with the provided name.
	// If you call this after you already have data in the store, the results are undefined.
	AddIndexer(indexName string, indexer Indexer[T])

	// GetByIndex returns the stored objects whose set of indexed values
	// for the named index includes the given indexed value.
	GetByIndex(indexName, key string) ([]T, error)
}

CacheInterface is an interface for Object retrieval from memory.

type ClientInterface 

type ClientInterface[T RuntimeMetaObject, TList runtime.Object] interface {
	// Create creates a new object and return the newly created Object or an error.
	Create(T) (T, error)

	// Update updates the object and return the newly updated Object or an error.
	Update(T) (T, error)

	// UpdateStatus updates the Status field of a the object and return the newly updated Object or an error.
	// Will always return an error if the object does not have a status field.
	UpdateStatus(T) (T, error)

	// Delete deletes the Object in the given name and namespace.
	Delete(namespace, name string, options *metav1.DeleteOptions) error

	// Get will attempt to retrieve the resource with the given name in the given namespace.
	Get(namespace, name string, options metav1.GetOptions) (T, error)

	// List will attempt to find resources in the given namespace.
	List(namespace string, opts metav1.ListOptions) (TList, error)

	// Watch will start watching resources in the given namespace.
	Watch(namespace string, opts metav1.ListOptions) (watch.Interface, error)

	// Patch will patch the resource with the matching name in the matching namespace.
	Patch(namespace, name string, pt types.PatchType, data []byte, subresources ...string) (result T, err error)

	// WithImpersonation returns a new copy of the client that uses impersonation.
	WithImpersonation(impersonate rest.ImpersonationConfig) (ClientInterface[T, TList], error)
}

ClientInterface is an interface to performs CRUD like operations on an Objects.

type Controller 

type Controller[T RuntimeMetaObject, TList runtime.Object] struct {
	// contains filtered or unexported fields
}

Controller is used to manage objects of type T.

func NewController 

func NewController[T RuntimeMetaObject, TList runtime.Object](gvk schema.GroupVersionKind, resource string, namespaced bool, controller controller.SharedControllerFactory) *Controller[T, TList]

NewController creates a new controller for the given Object type and ObjectList type.

func (*Controller[T, TList]) AddGenericHandler 

func (c *Controller[T, TList]) AddGenericHandler(ctx context.Context, name string, handler Handler)

AddGenericHandler runs the given handler when the controller detects an object was changed.

func (*Controller[T, TList]) AddGenericRemoveHandler 

func (c *Controller[T, TList]) AddGenericRemoveHandler(ctx context.Context, name string, handler Handler)

AddGenericRemoveHandler runs the given handler when the controller detects an object was removed.

func (*Controller[T, TList]) Cache 

func (c *Controller[T, TList]) Cache() CacheInterface[T]

Cache returns a cache for the objects T.

func (*Controller[T, TList]) Create 

func (c *Controller[T, TList]) Create(obj T) (T, error)

Create creates a new object and return the newly created Object or an error.

func (*Controller[T, TList]) Delete 

func (c *Controller[T, TList]) Delete(namespace, name string, options *metav1.DeleteOptions) error

Delete deletes the Object in the given name and Namespace.

func (*Controller[T, TList]) Enqueue 

func (c *Controller[T, TList]) Enqueue(namespace, name string)

Enqueue adds the resource with the given name in the provided namespace to the worker queue of the controller.

func (*Controller[T, TList]) EnqueueAfter 

func (c *Controller[T, TList]) EnqueueAfter(namespace, name string, duration time.Duration)

EnqueueAfter runs Enqueue after the provided duration.

func (*Controller[T, TList]) Get 

func (c *Controller[T, TList]) Get(namespace, name string, options metav1.GetOptions) (T, error)

Get gets returns the given resource with the given name in the provided namespace.

func (*Controller[T, TList]) GroupVersionKind 

func (c *Controller[T, TList]) GroupVersionKind() schema.GroupVersionKind

GroupVersionKind returns the GVK used to create this Controller.

func (*Controller[T, TList]) Informer 

func (c *Controller[T, TList]) Informer() cache.SharedIndexInformer

Informer returns the SharedIndexInformer used by this controller.

func (*Controller[T, TList]) List 

func (c *Controller[T, TList]) List(namespace string, opts metav1.ListOptions) (TList, error)

List will attempt to find resources in the given namespace.

func (*Controller[T, TList]) OnChange 

func (c *Controller[T, TList]) OnChange(ctx context.Context, name string, sync ObjectHandler[T])

OnChange runs the given object handler when the controller detects a resource was changed.

func (*Controller[T, TList]) OnRemove 

func (c *Controller[T, TList]) OnRemove(ctx context.Context, name string, sync ObjectHandler[T])

OnRemove runs the given object handler when the controller detects a resource was changed.

func (*Controller[T, TList]) Patch 

func (c *Controller[T, TList]) Patch(namespace, name string, pt types.PatchType, data []byte, subresources ...string) (T, error)

Patch will patch the resource with the matching name in the matching namespace.

func (*Controller[T, TList]) Update 

func (c *Controller[T, TList]) Update(obj T) (T, error)

Update updates the object and return the newly updated Object or an error.

func (*Controller[T, TList]) UpdateStatus 

func (c *Controller[T, TList]) UpdateStatus(obj T) (T, error)

UpdateStatus updates the Status field of a the object and return the newly updated Object or an error. Will always return an error if the object does not have a status field.

func (*Controller[T, TList]) Updater 

func (c *Controller[T, TList]) Updater() Updater

Updater creates a new Updater for the Object type T.

func (*Controller[T, TList]) Watch 

func (c *Controller[T, TList]) Watch(namespace string, opts metav1.ListOptions) (watch.Interface, error)

Watch will start watching resources in the given namespace.

func (*Controller[T, TList]) WithImpersonation 

func (c *Controller[T, TList]) WithImpersonation(impersonate rest.ImpersonationConfig) (ClientInterface[T, TList], error)

WithImpersonation returns a new copy of the client that uses impersonation.

type ControllerInterface 

type ControllerInterface[T RuntimeMetaObject, TList runtime.Object] interface {
	ControllerMeta
	ClientInterface[T, TList]

	// OnChange runs the given object handler when the controller detects a resource was changed.
	OnChange(ctx context.Context, name string, sync ObjectHandler[T])

	// OnRemove runs the given object handler when the controller detects a resource was changed.
	OnRemove(ctx context.Context, name string, sync ObjectHandler[T])

	// Enqueue adds the resource with the given name in the provided namespace to the worker queue of the controller.
	Enqueue(namespace, name string)

	// EnqueueAfter runs Enqueue after the provided duration.
	EnqueueAfter(namespace, name string, duration time.Duration)

	// Cache returns a cache for the resource type T.
	Cache() CacheInterface[T]
}

ControllerInterface interface for managing K8s Objects.

type ControllerMeta 

type ControllerMeta interface {
	// Informer returns the SharedIndexInformer used by this controller.
	Informer() cache.SharedIndexInformer

	// GroupVersionKind returns the GVK used to create this Controller.
	GroupVersionKind() schema.GroupVersionKind

	// AddGenericHandler adds a generic handler that runs when a resource changes.
	AddGenericHandler(ctx context.Context, name string, handler Handler)

	// AddGenericHandler adds a generic handler that runs when a resource is removed.
	AddGenericRemoveHandler(ctx context.Context, name string, handler Handler)

	// Updater returns a update function that will attempt to perform an update for a specific resource type.
	Updater() Updater
}

ControllerMeta holds meta information shared by all controllers.

type Factory 

type Factory struct {
	// contains filtered or unexported fields
}

func NewFactoryFromConfigWithOptions 

func NewFactoryFromConfigWithOptions(config *rest.Config, opts *FactoryOptions) (*Factory, error)

func (*Factory) ControllerFactory 

func (c *Factory) ControllerFactory() controller.SharedControllerFactory

func (*Factory) SetThreadiness 

func (c *Factory) SetThreadiness(gvk schema.GroupVersionKind, threadiness int)

func (*Factory) Start 

func (c *Factory) Start(ctx context.Context, defaultThreadiness int) error

func (*Factory) Sync 

func (c *Factory) Sync(ctx context.Context) error

type FactoryOptions 

type FactoryOptions struct {
	Namespace               string
	Resync                  time.Duration
	SharedCacheFactory      cache.SharedCacheFactory
	SharedControllerFactory controller.SharedControllerFactory
	HealthCallback          func(bool)
}

type GeneratingHandlerOptions 

type GeneratingHandlerOptions struct {
	AllowCrossNamespace bool
	AllowClusterScoped  bool
	NoOwnerReference    bool
	DynamicLookup       bool
	// UniqueApplyForResourceVersion will skip calling apply if the resource version didn't change from the previous execution
	UniqueApplyForResourceVersion bool
}

type Handler 

type Handler func(key string, obj runtime.Object) (runtime.Object, error)

ObjectHandler performs operations on the given runtime.Object and returns the new runtime.Object or an error

func FromObjectHandlerToHandler 

func FromObjectHandlerToHandler[T RuntimeMetaObject](sync ObjectHandler[T]) Handler

FromObjectHandlerToHandler converts an ObjecHandler to a Handler.

func NewRemoveHandler 

func NewRemoveHandler(name string, updater Updater, handler Handler) Handler

type Indexer 

type Indexer[T runtime.Object] func(obj T) ([]string, error)

Indexer computes a set of indexed values for the provided object.

type NonNamespacedCache 

type NonNamespacedCache[T runtime.Object] struct {
	CacheInterface[T]
}

NonNamespacedCache is a Cache for objects of type T that are not namespaced.

func (*NonNamespacedCache[T]) Get 

func (c *NonNamespacedCache[T]) Get(name string) (T, error)

Get calls Cache.Get(...) with an empty namespace parameter.

func (*NonNamespacedCache[T]) List 

func (c *NonNamespacedCache[T]) List(selector labels.Selector) (ret []T, err error)

Get calls Cache.List(...) with an empty namespace parameter.

type NonNamespacedCacheInterface 

type NonNamespacedCacheInterface[T runtime.Object] interface {
	// Get returns the resources with the specified name from the cache.
	Get(name string) (T, error)

	// List will attempt to find resources from the Cache.
	List(selector labels.Selector) ([]T, error)

	// AddIndexer adds  a new Indexer to the cache with the provided name.
	// If you call this after you already have data in the store, the results are undefined.
	AddIndexer(indexName string, indexer Indexer[T])

	// GetByIndex returns the stored objects whose set of indexed values
	// for the named index includes the given indexed value.
	GetByIndex(indexName, key string) ([]T, error)
}

NonNamespacedCacheInterface is an interface for non namespaced Object retrieval from memory.

type NonNamespacedClientInterface 

type NonNamespacedClientInterface[T RuntimeMetaObject, TList runtime.Object] interface {
	// Create creates a new object and return the newly created Object or an error.
	Create(T) (T, error)

	// Update updates the object and return the newly updated Object or an error.
	Update(T) (T, error)

	// UpdateStatus updates the Status field of a the object and return the newly updated Object or an error.
	// Will always return an error if the object does not have a status field.
	UpdateStatus(T) (T, error)

	// Delete deletes the Object in the given name.
	Delete(name string, options *metav1.DeleteOptions) error

	// Get will attempt to retrieve the resource with the specified name.
	Get(name string, options metav1.GetOptions) (T, error)

	// List will attempt to find multiple resources.
	List(opts metav1.ListOptions) (TList, error)

	// Watch will start watching resources.
	Watch(opts metav1.ListOptions) (watch.Interface, error)

	// Patch will patch the resource with the matching name.
	Patch(name string, pt types.PatchType, data []byte, subresources ...string) (result T, err error)

	// WithImpersonation returns a new copy of the client that uses impersonation.
	WithImpersonation(impersonate rest.ImpersonationConfig) (NonNamespacedClientInterface[T, TList], error)
}

NonNamespacedClientInterface is an interface to performs CRUD like operations on nonNamespaced Objects.

type NonNamespacedController 

type NonNamespacedController[T RuntimeMetaObject, TList runtime.Object] struct {
	*Controller[T, TList]
}

NonNamespacedController is a Controller for non namespaced resources. This controller provides similar function definitions as Controller except the namespace parameter is omitted.

func NewNonNamespacedController 

func NewNonNamespacedController[T RuntimeMetaObject, TList runtime.Object](gvk schema.GroupVersionKind, resource string,
	controller controller.SharedControllerFactory,
) *NonNamespacedController[T, TList]

NewNonNamespacedController returns a Controller controller that is not namespaced. NonNamespacedController redefines specific functions to no longer accept the namespace parameter.

func (*NonNamespacedController[T, TList]) Cache 

func (c *NonNamespacedController[T, TList]) Cache() NonNamespacedCacheInterface[T]

Cache calls ControllerInterface.Cache(...) and wraps the result in a new NonNamespacedCache.

func (*NonNamespacedController[T, TList]) Delete 

func (c *NonNamespacedController[T, TList]) Delete(name string, options *metav1.DeleteOptions) error

Delete calls Controller.Delete(...) with an empty namespace parameter.

func (*NonNamespacedController[T, TList]) Enqueue 

func (c *NonNamespacedController[T, TList]) Enqueue(name string)

Enqueue calls Controller.Enqueue(...) with an empty namespace parameter.

func (*NonNamespacedController[T, TList]) EnqueueAfter 

func (c *NonNamespacedController[T, TList]) EnqueueAfter(name string, duration time.Duration)

EnqueueAfter calls Controller.EnqueueAfter(...) with an empty namespace parameter.

func (*NonNamespacedController[T, TList]) Get 

func (c *NonNamespacedController[T, TList]) Get(name string, options metav1.GetOptions) (T, error)

Get calls Controller.Get(...) with an empty namespace parameter.

func (*NonNamespacedController[T, TList]) List 

func (c *NonNamespacedController[T, TList]) List(opts metav1.ListOptions) (TList, error)

List calls Controller.List(...) with an empty namespace parameter.

func (*NonNamespacedController[T, TList]) Patch 

func (c *NonNamespacedController[T, TList]) Patch(name string, pt types.PatchType, data []byte, subresources ...string) (T, error)

Patch calls the Controller.Patch(...) with an empty namespace parameter.

func (*NonNamespacedController[T, TList]) Watch 

func (c *NonNamespacedController[T, TList]) Watch(opts metav1.ListOptions) (watch.Interface, error)

Watch calls Controller.Watch(...) with an empty namespace parameter.

func (*NonNamespacedController[T, TList]) WithImpersonation 

func (c *NonNamespacedController[T, TList]) WithImpersonation(impersonate rest.ImpersonationConfig) (NonNamespacedClientInterface[T, TList], error)

WithImpersonation returns a new copy of the client that uses impersonation.

type NonNamespacedControllerInterface 

type NonNamespacedControllerInterface[T RuntimeMetaObject, TList runtime.Object] interface {
	ControllerMeta
	NonNamespacedClientInterface[T, TList]

	// OnChange runs the given object handler when the controller detects a resource was changed.
	OnChange(ctx context.Context, name string, sync ObjectHandler[T])

	// OnRemove runs the given object handler when the controller detects a resource was changed.
	OnRemove(ctx context.Context, name string, sync ObjectHandler[T])

	// Enqueue adds the resource with the given name to the worker queue of the controller.
	Enqueue(name string)

	// EnqueueAfter runs Enqueue after the provided duration.
	EnqueueAfter(name string, duration time.Duration)

	// Cache returns a cache for the resource type T.
	Cache() NonNamespacedCacheInterface[T]
}

NonNamespacedControllerInterface interface for managing non namespaced K8s Objects.

type ObjectHandler 

type ObjectHandler[T runtime.Object] func(string, T) (T, error)

ObjectHandler performs operations on the given object and returns the new object or an error

type RuntimeMetaObject 

type RuntimeMetaObject interface {
	comparable
	runtime.Object
	metav1.Object
}

RuntimeMetaObject is an interface for a K8s Object to be used with a specific controller.

type Updater 

type Updater func(runtime.Object) (runtime.Object, error)

Source Files

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Directories

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Package fake is a generated GoMock package.
 Package fake is a generated GoMock package.

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