managed

package
v0.4.0 Latest Latest
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 Go to latest Published: Mar 27, 2022 License: Apache-2.0 Imports: 17 Imported by: 0

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Constants

This section is empty.

Variables

This section is empty.

Functions

func ControllerName 

func ControllerName(kind string) string

ControllerName returns the recommended name for controllers that use this package to reconcile a particular kind of managed resource.

Types

type ConnectionDetails 

type ConnectionDetails map[string][]byte

ConnectionDetails created or updated during an operation on an external resource, for example usernames, passwords, endpoints, ports, etc.

type ExternalClient 

type ExternalClient interface {
	// Observe the external resource the supplied Managed resource represents,
	// if any. Observe implementations must not modify the external resource,
	// but may update the supplied Managed resource to reflect the state of the
	// external resource.
	Observe(ctx context.Context, mg resource.Managed, runningCfg []byte) (ExternalObservation, error)

	// Create an external resource per the specifications of the supplied
	// Managed resource. Called when Observe reports that the associated
	// external resource does not exist.
	Create(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

	// Update the external resource represented by the supplied Managed
	// resource, if necessary. Called unless Observe reports that the
	// associated external resource is up to date.
	Update(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

	// Delete the external resource upon deletion of its associated Managed
	// resource. Called when the managed resource has been deleted.
	Delete(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

	// GetSystemConfig returns the system config for a particular device from
	// the system proxy cache
	GetSystemConfig(ctx context.Context, mg resource.Managed) (*ygotnddp.Device, error)

	// GetResourceName returns the running config for a particular device from
	// the running device proxy cache
	GetRunningConfig(ctx context.Context, mg resource.Managed) ([]byte, error)

	// Close
	Close()
}

An ExternalClient manages the lifecycle of an external resource. None of the calls here should be blocking. All of the calls should be idempotent. For example, Create call should not return AlreadyExists error if it's called again with the same parameters or Delete call should not return error if there is an ongoing deletion or resource does not exist.

type ExternalClientFns 

type ExternalClientFns struct {
	ObserveFn          func(ctx context.Context, mg resource.Managed, runningCfg []byte) (ExternalObservation, error)
	CreateFn           func(ctx context.Context, mg resource.Managed, obs ExternalObservation) error
	UpdateFn           func(ctx context.Context, mg resource.Managed, obs ExternalObservation) error
	DeleteFn           func(ctx context.Context, mg resource.Managed, obs ExternalObservation) error
	GetSystemConfigFn  func(ctx context.Context, mg resource.Managed) (*ygotnddp.Device, error)
	GetRunningConfigFn func(ctx context.Context, mg resource.Managed) ([]byte, error)
	CloseFn            func()
}

ExternalClientFns are a series of functions that satisfy the ExternalClient interface.

func (ExternalClientFns) Close added in v0.2.14 

func (e ExternalClientFns) Close()

GetResourceName returns the resource matching the path

func (ExternalClientFns) Create 

func (e ExternalClientFns) Create(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

Create an external resource per the specifications of the supplied Managed resource.

func (ExternalClientFns) Delete 

func (e ExternalClientFns) Delete(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

Delete the external resource upon deletion of its associated Managed resource.

func (ExternalClientFns) GetRunningConfig added in v0.4.0 

func (e ExternalClientFns) GetRunningConfig(ctx context.Context, mg resource.Managed) ([]byte, error)

GetResourceName returns the running config for a particular device from the running device proxy cache

func (ExternalClientFns) GetSystemConfig added in v0.4.0 

func (e ExternalClientFns) GetSystemConfig(ctx context.Context, mg resource.Managed) (*ygotnddp.Device, error)

GetSystemConfig returns the system config for a particular device from the system proxy cache

func (ExternalClientFns) Observe 

func (e ExternalClientFns) Observe(ctx context.Context, mg resource.Managed, runningCfg []byte) (ExternalObservation, error)

Observe the external resource the supplied Managed resource represents, if any.

func (ExternalClientFns) Update 

func (e ExternalClientFns) Update(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

Update the external resource represented by the supplied Managed resource, if necessary.

type ExternalConnecter 

type ExternalConnecter interface {
	// Connect to the provider specified by the supplied managed resource and
	// produce an ExternalClient.
	Connect(ctx context.Context, mg resource.Managed) (ExternalClient, error)
}

An ExternalConnecter produces a new ExternalClient given the supplied Managed resource.

type ExternalConnectorFn 

type ExternalConnectorFn func(ctx context.Context, mg resource.Managed) (ExternalClient, error)

An ExternalConnectorFn is a function that satisfies the ExternalConnecter interface.

func (ExternalConnectorFn) Connect 

func (ec ExternalConnectorFn) Connect(ctx context.Context, mg resource.Managed) (ExternalClient, error)

Connect to the provider specified by the supplied managed resource and produce an ExternalClient.

type ExternalObservation 

type ExternalObservation struct {
	// indicated if the cache is exhausted or not, during cache startup this can occur
	// when the cache/device is overloaded
	Exhausted bool
	// indicated if the cache is ready or not, during cache startup this can occur
	// when the cache is still initializing
	Ready bool
	// ActionExecuted the respective action on the resource was executed, so we can validate the status
	Pending bool
	// ResourceExists must be true if a corresponding external resource exists
	// for the managed resource.
	Exists bool
	// indicates if the resource spec was not successfully applied to the device
	// unless the resourceSpec changes the transaction would not be successfull
	// we dont try to reconcile unless the spec changed
	Failed bool
	// Provides additional information why a failure occurs
	Message string
	// ResourceHasData can be true when a managed resource is created, but the
	// device had already data in that resource. The data needs to get aligned
	// with the intended resource data
	HasData bool
	// ResourceUpToDate should be true if the corresponding external resource
	// appears to be up-to-date with the resourceSpec
	IsUpToDate bool
	// when the resource is not up to date these 2 parameter determine what to do to realign the resource to the spec
	Deletes []*gnmi.Path
	Updates []*gnmi.Update
}

An ExternalObservation is the result of an observation of an external resource.

type NopClient 

type NopClient struct{}

A NopClient does nothing.

func (*NopClient) Close added in v0.2.14 

func (c *NopClient) Close()

func (*NopClient) Create 

func (c *NopClient) Create(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

Create does nothing. It returns an empty ExternalCreation and no error.

func (*NopClient) Delete 

func (c *NopClient) Delete(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

Delete does nothing. It never returns an error.

func (*NopClient) GetRunningConfig added in v0.4.0 

func (c *NopClient) GetRunningConfig(ctx context.Context, mg resource.Managed) ([]byte, error)

GetResourceName returns the running config for a particular device from the running device proxy cache

func (*NopClient) GetSystemConfig added in v0.4.0 

func (c *NopClient) GetSystemConfig(ctx context.Context, mg resource.Managed) (*ygotnddp.Device, error)

GetSystemConfig returns the system config for a particular device from the system proxy cache

func (*NopClient) Observe 

func (c *NopClient) Observe(ctx context.Context, mg resource.Managed, runningCfg []byte) (ExternalObservation, error)

Observe does nothing. It returns an empty ExternalObservation and no error.

func (*NopClient) Update 

func (c *NopClient) Update(ctx context.Context, mg resource.Managed, obs ExternalObservation) error

Update does nothing. It returns an empty ExternalUpdate and no error.

type NopConnecter 

type NopConnecter struct{}

A NopConnecter does nothing.

func (*NopConnecter) Connect 

func (c *NopConnecter) Connect(_ context.Context, _ resource.Managed) (ExternalClient, error)

Connect returns a NopClient. It never returns an error.

type NopValidator 

type NopValidator struct{}

func (*NopValidator) ValidateConfig added in v0.4.0 

func (e *NopValidator) ValidateConfig(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device, runningCfg []byte) (ValidateConfigObservation, error)

func (*NopValidator) ValidateResource added in v0.4.0 

func (e *NopValidator) ValidateResource(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device) (ValidateResourceObservation, error)

type Reconciler 

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

A Reconciler reconciles managed resources by creating and managing the lifecycle of an external resource, i.e. a resource in an external network device through an API. Each controller must watch the managed resource kind for which it is responsible.

func NewReconciler 

func NewReconciler(m manager.Manager, of resource.ManagedKind, o ...ReconcilerOption) *Reconciler

NewReconciler returns a Reconciler that reconciles managed resources of the supplied ManagedKind with resources in an external network device. It panics if asked to reconcile a managed resource kind that is not registered with the supplied manager's runtime.Scheme. The returned Reconciler reconciles with a dummy, no-op 'external system' by default; callers should supply an ExternalConnector that returns an ExternalClient capable of managing resources in a real system.

func (*Reconciler) Reconcile 

func (r *Reconciler) Reconcile(_ context.Context, req reconcile.Request) (reconcile.Result, error)

Reconcile a managed resource with an external resource.

type ReconcilerOption 

type ReconcilerOption func(*Reconciler)

A ReconcilerOption configures a Reconciler.

func WithExternalConnecter 

func WithExternalConnecter(c ExternalConnecter) ReconcilerOption

WithExternalConnecter specifies how the Reconciler should connect to the API used to sync and delete external resources.

func WithFinalizer 

func WithFinalizer(f resource.Finalizer) ReconcilerOption

WithFinalizer specifies how the Reconciler should add and remove finalizers to and from the managed resource.

func WithLogger 

func WithLogger(l logging.Logger) ReconcilerOption

WithLogger specifies how the Reconciler should log messages.

func WithParser 

func WithParser(l logging.Logger) ReconcilerOption

func WithPollInterval 

func WithPollInterval(after time.Duration) ReconcilerOption

WithPollInterval specifies how long the Reconciler should wait before queueing a new reconciliation after a successful reconcile. The Reconciler requeues after a specified duration when it is not actively waiting for an external operation, but wishes to check whether an existing external resource needs to be synced to its ndd Managed resource.

func WithRecorder 

func WithRecorder(er event.Recorder) ReconcilerOption

WithRecorder specifies how the Reconciler should record events.

func WithTimeout 

func WithTimeout(duration time.Duration) ReconcilerOption

WithTimeout specifies the timeout duration cumulatively for all the calls happen in the reconciliation function. In case the deadline exceeds, reconciler will still have some time to make the necessary calls to report the error such as status update.

func WithValidator 

func WithValidator(v Validator) ReconcilerOption

type ValidateConfigObservation added in v0.4.0 

type ValidateConfigObservation struct {
	ValidateSucces bool
	// Provides additional information why a validation failured occured
	Message     string
	Changed     bool
	DeletePaths []*gnmi.Path
}

type ValidateResourceObservation added in v0.4.0 

type ValidateResourceObservation struct {
	// indicates if the device is exhausted or not, this can happen when too many transactions
	// occured towards the device
	Exhausted bool
	// indicates if the device in the proxy-cache is ready or not, during proxy-cache
	// startup this can occur during proxy-cache initialization
	Ready bool
	// indicates if the MR is not yet reconciled, the reconciler should wait for further actions
	Pending bool
	// indicates if a MR exists in the cache
	Exists bool
	// indicates if the resource spec was not successfully applied to the device
	// unless the resourceSpec changes the transaction would not be successfull
	// we dont try to reconcile unless the spec changed
	Failed bool
	// Provides additional information why a failure occurs
	Message string
	// indicates if the spec was changed and subsequent actionsare required
	Changed     bool
	RootPaths   []string
	DeletePaths []*gnmi.Path
}

type Validator 

type Validator interface {
	ValidateResource(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device) (ValidateResourceObservation, error)

	ValidateConfig(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device, runningCfg []byte) (ValidateConfigObservation, error)
}

type ValidatorFn 

type ValidatorFn struct {
	ValidateResourceFn func(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device) (ValidateResourceObservation, error)
	ValidateConfigFn   func(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device, runningCfg []byte) (ValidateConfigObservation, error)
}

func (ValidatorFn) ValidateConfig added in v0.4.0 

func (e ValidatorFn) ValidateConfig(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device, runningCfg []byte) (ValidateConfigObservation, error)

func (ValidatorFn) ValidateResource added in v0.4.0 

func (e ValidatorFn) ValidateResource(ctx context.Context, mg resource.Managed, systemCfg *ygotnddp.Device) (ValidateResourceObservation, error)

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