ensurer

Documentation

Index

• func EnsureConfiguration[ObjectType configurationObjectType](ctx context.Context, ops ObjectOps[ObjectType], bootstrap ObjectType, ...) error
• func EnsureConfigurations[ObjectType configurationObjectType](ctx context.Context, ops ObjectOps[ObjectType], boots []ObjectType, ...) error
• func RemoveUnwantedObjects[ObjectType configurationObjectType](ctx context.Context, objectOps ObjectOps[ObjectType], boots []ObjectType) error
• type EnsureStrategy
  • func NewMandatoryEnsureStrategy[ObjectType configurationObjectType]() EnsureStrategy[ObjectType]
  • func NewSuggestedEnsureStrategy[ObjectType configurationObjectType]() EnsureStrategy[ObjectType]
• type ObjectOps
  • func NewFlowSchemaOps(client flowcontrolclient.FlowSchemaInterface, ...) ObjectOps[*flowcontrolv1beta3.FlowSchema]
  • func NewObjectOps[ObjectType configurationObjectType](client client[ObjectType], cache cache[ObjectType], ...) ObjectOps[ObjectType]
  • func NewPriorityLevelConfigurationOps(client flowcontrolclient.PriorityLevelConfigurationInterface, ...) ObjectOps[*flowcontrolv1beta3.PriorityLevelConfiguration]

Functions

func EnsureConfiguration

func EnsureConfiguration[ObjectType configurationObjectType](ctx context.Context, ops ObjectOps[ObjectType], bootstrap ObjectType, strategy EnsureStrategy[ObjectType]) error

EnsureConfiguration applies the given maintenance strategy to the given object.

func EnsureConfigurations

func EnsureConfigurations[ObjectType configurationObjectType](ctx context.Context, ops ObjectOps[ObjectType], boots []ObjectType, strategy EnsureStrategy[ObjectType]) error

EnsureConfigurations applies the given maintenance strategy to the given objects. At the first error, if any, it stops and returns that error.

func RemoveUnwantedObjects

func RemoveUnwantedObjects[ObjectType configurationObjectType](ctx context.Context, objectOps ObjectOps[ObjectType], boots []ObjectType) error

RemoveUnwantedObjects attempts to delete the configuration objects that exist, are annotated `apf.kubernetes.io/autoupdate-spec=true`, and do not have a name in the given set. A refusal due to concurrent update is logged and not considered an error; the object will be reconsidered later.

Types

type EnsureStrategy

type EnsureStrategy[ObjectType configurationObjectType] interface {
	// Name of the strategy, for now we have two: 'mandatory' and 'suggested'.
	// This comes handy in logging.
	Name() string

	// ReviseIfNeeded accepts a pair of the current and the bootstrap configuration, determines
	// whether an update is necessary, and returns a (revised if appropriate) copy of the object.
	// current is the existing in-cluster configuration object.
	// bootstrap is the configuration the kube-apiserver maintains in-memory.
	//
	// revised: the new object represents the new configuration to be stored in-cluster.
	// ok: true if auto update is required, otherwise false
	// err: err is set when the function runs into an error and can not
	//      determine if auto update is needed.
	ReviseIfNeeded(objectOps objectLocalOps[ObjectType], current, bootstrap ObjectType) (revised ObjectType, ok bool, err error)
}

EnsureStrategy provides a maintenance strategy for APF configuration objects. We have two types of strategy, corresponding to the two types of config objetcs:

• mandatory: the mandatory configurationWrapper objects are about ensuring that the P&F system itself won't crash; we have to be sure there's 'catch-all' place for everything to go. Any changes made by the cluster operators to these configurationWrapper objects will be stomped by the apiserver.

• suggested: additional configurationWrapper objects for initial behavior. the cluster operators have an option to edit or delete these configurationWrapper objects.

func NewMandatoryEnsureStrategy

func NewMandatoryEnsureStrategy[ObjectType configurationObjectType]() EnsureStrategy[ObjectType]

NewMandatoryEnsureStrategy returns an EnsureStrategy for mandatory config objects

func NewSuggestedEnsureStrategy

func NewSuggestedEnsureStrategy[ObjectType configurationObjectType]() EnsureStrategy[ObjectType]

NewSuggestedEnsureStrategy returns an EnsureStrategy for suggested config objects

type ObjectOps

type ObjectOps[ObjectType configurationObject] interface {
	// contains filtered or unexported methods
}

ObjectOps is the needed operations, both as a receiver from a server and server-independent, on configurationObjects

func NewFlowSchemaOps

func NewFlowSchemaOps(client flowcontrolclient.FlowSchemaInterface, cache flowcontrollisters.FlowSchemaLister) ObjectOps[*flowcontrolv1beta3.FlowSchema]

func NewObjectOps

func NewObjectOps[ObjectType configurationObjectType](client client[ObjectType], cache cache[ObjectType],
	deepCopy func(ObjectType) ObjectType,
	replaceSpec func(ObjectType, ObjectType) ObjectType,
	specEqualish func(expected, actual ObjectType) bool,
) ObjectOps[ObjectType]

func NewPriorityLevelConfigurationOps

func NewPriorityLevelConfigurationOps(client flowcontrolclient.PriorityLevelConfigurationInterface, lister flowcontrollisters.PriorityLevelConfigurationLister) ObjectOps[*flowcontrolv1beta3.PriorityLevelConfiguration]