model

Documentation

Index

• Constants
• func AddScheme(addToScheme func(*runtime.Scheme) error)
• func DefaultLess(v1, v2 graph.Vertex) bool
• func GetScheme() *runtime.Scheme
• func IsObjectDeleting(object client.Object) bool
• func IsObjectStatusUpdating(object client.Object) bool
• func IsObjectUpdating(object client.Object) bool
• func IsOwnerOf(owner, obj client.Object) bool
• func NewRequeueError(after time.Duration, reason string) error
• type Action
  • func ActionCreatePtr() *Action
  • func ActionDeletePtr() *Action
  • func ActionNoopPtr() *Action
  • func ActionPatchPtr() *Action
  • func ActionStatusPtr() *Action
  • func ActionUpdatePtr() *Action
• type GVKNObjKey
  • func GetGVKName(object client.Object) (*GVKNObjKey, error)
• type GraphClient
  • func NewGraphClient(cli client.Client) GraphClient
• type GraphOption
• type GraphWriter
• type ObjectSnapshot
  • func ReadCacheSnapshot(transCtx graph.TransformContext, root client.Object, ml client.MatchingLabels, ...) (ObjectSnapshot, error)
• type ObjectVertex
  • func FindRootVertex(dag *graph.DAG) (*ObjectVertex, error)
  • func (v *ObjectVertex) String() string
• type ParallelTransformer
  • func (t *ParallelTransformer) Transform(ctx graph.TransformContext, dag *graph.DAG) error
• type RequeueError

Constants

const (
	// ReplaceIfExistingOption tells the GraphWriter methods to replace Obj and OriObj with the given ones if already existing.
	// used in Action methods: Create, Update, Patch, Status, Noop and Delete
	ReplaceIfExistingOption = "ReplaceIfExisting"

	// HaveDifferentTypeWithOption is used in FindAll method to find all objects have different type with the given one.
	HaveDifferentTypeWithOption = "HaveDifferentTypeWith"
)

const (
	CREATE = Action("CREATE")
	UPDATE = Action("UPDATE")
	PATCH  = Action("PATCH")
	DELETE = Action("DELETE")
	STATUS = Action("STATUS")
	NOOP   = Action("NOOP")
)

Functions

func AddScheme

func AddScheme(addToScheme func(*runtime.Scheme) error)

func DefaultLess

func DefaultLess(v1, v2 graph.Vertex) bool

func GetScheme

func GetScheme() *runtime.Scheme

func IsObjectDeleting

func IsObjectDeleting(object client.Object) bool

func IsObjectStatusUpdating

func IsObjectStatusUpdating(object client.Object) bool

func IsObjectUpdating

func IsObjectUpdating(object client.Object) bool

func IsOwnerOf

func IsOwnerOf(owner, obj client.Object) bool

func NewRequeueError

func NewRequeueError(after time.Duration, reason string) error

Types

type Action

type Action string

func ActionCreatePtr

func ActionCreatePtr() *Action

func ActionDeletePtr

func ActionDeletePtr() *Action

func ActionNoopPtr

func ActionNoopPtr() *Action

func ActionPatchPtr

func ActionPatchPtr() *Action

func ActionStatusPtr

func ActionStatusPtr() *Action

func ActionUpdatePtr

func ActionUpdatePtr() *Action

type GVKNObjKey

type GVKNObjKey struct {
	schema.GroupVersionKind
	client.ObjectKey
}

func GetGVKName

func GetGVKName(object client.Object) (*GVKNObjKey, error)

type GraphClient

type GraphClient interface {
	client.Reader
	GraphWriter
}

func NewGraphClient

func NewGraphClient(cli client.Client) GraphClient

type GraphOption

type GraphOption string

GraphOption specifies behaviors of GraphWriter methods. currently enum is enough, maybe extend to interface in the future.

type GraphWriter

type GraphWriter interface {
	// Root setups the given obj as root vertex of the underlying DAG.
	Root(dag *graph.DAG, objOld, objNew client.Object, action *Action)

	// Create saves the object obj in the underlying DAG.
	Create(dag *graph.DAG, obj client.Object, opts ...GraphOption)

	// Delete deletes the given obj from the underlying DAG.
	Delete(dag *graph.DAG, obj client.Object, opts ...GraphOption)

	// Update updates the given obj in the underlying DAG.
	Update(dag *graph.DAG, objOld, objNew client.Object, opts ...GraphOption)

	// Patch patches the given objOld by the new version objNew in the underlying DAG.
	Patch(dag *graph.DAG, objOld, objNew client.Object, opts ...GraphOption)

	// Status updates the given obj's status in the underlying DAG.
	Status(dag *graph.DAG, objOld, objNew client.Object, opts ...GraphOption)

	// Noop means not to commit any change made to this obj in the execute phase.
	Noop(dag *graph.DAG, obj client.Object, opts ...GraphOption)

	// Do does 'action' to 'objOld' and 'objNew' and return the vertex created.
	// this method creates a vertex directly even if the given object already exists in the underlying DAG.
	// WARN: this is a rather low-level API, will be refactored out in near future, avoid to use it.
	Do(dag *graph.DAG, objOld, objNew client.Object, action *Action, parent *ObjectVertex) *ObjectVertex

	// IsAction tells whether the action of the vertex of this obj is same as 'action'.
	IsAction(dag *graph.DAG, obj client.Object, action *Action) bool

	// DependOn setups dependencies between 'object' and 'dependencies',
	// which will guarantee the Write Order to the K8s cluster of these objects.
	// if multiple vertices exist(which can occur when ForceCreatingVertexOption being used), the one with the largest depth will be used.
	DependOn(dag *graph.DAG, object client.Object, dependencies ...client.Object)

	// FindAll finds all objects that have same type with obj in the underlying DAG.
	// obey the GraphOption if provided.
	FindAll(dag *graph.DAG, obj interface{}, opts ...GraphOption) []client.Object
}

type ObjectSnapshot

type ObjectSnapshot map[GVKNObjKey]client.Object

func ReadCacheSnapshot

func ReadCacheSnapshot(transCtx graph.TransformContext, root client.Object, ml client.MatchingLabels, kinds ...client.ObjectList) (ObjectSnapshot, error)

ReadCacheSnapshot reads all objects owned by our cluster

type ObjectVertex

type ObjectVertex struct {
	Obj    client.Object
	OriObj client.Object
	Action *Action
}

ObjectVertex describes expected object spec and how to reach it obj always represents the expected part: new object in Create/Update action and old object in Delete action oriObj is set in Update action all transformers doing their object manipulation works on obj.spec the root vertex(i.e. the cluster vertex) will be treated specially: as all its meta, spec and status can be updated in one reconciliation loop

func FindRootVertex

func FindRootVertex(dag *graph.DAG) (*ObjectVertex, error)

func (*ObjectVertex) String

func (v *ObjectVertex) String() string

type ParallelTransformer

type ParallelTransformer struct {
	Transformers []graph.Transformer
}

ParallelTransformer executes a group of transformers in parallel. TODO: make DAG thread-safe if ParallelTransformer called.

func (*ParallelTransformer) Transform

func (t *ParallelTransformer) Transform(ctx graph.TransformContext, dag *graph.DAG) error

type RequeueError

type RequeueError interface {
	RequeueAfter() time.Duration
	Reason() string
}