controller

Documentation

Overview

Package controller offers embeddable structs for use in your controller and underlying reconcilers, to help with conforming to GitOps Toolkit conventions.

Index

• Variables
• func GetDefaultRateLimiter() ratelimiter.RateLimiter
• func GetRateLimiter(opts RateLimiterOptions) ratelimiter.RateLimiter
• func GetWatchLabelSelector(opts WatchOptions) (*metav1.LabelSelector, error)
• func GetWatchSelector(opts WatchOptions) (labels.Selector, error)
• type ConnectionOptions
  • func (o *ConnectionOptions) BindFlags(fs *pflag.FlagSet)
  • func (o *ConnectionOptions) CheckEnvironmentCompatibility() error
• type Metrics
  • func NewMetrics(mgr ctrl.Manager, recorder *metrics.Recorder, finalizers ...string) Metrics
  • func (m Metrics) DeleteCondition(ctx context.Context, obj conditions.Getter, conditionType string)
  • func (m Metrics) IsDelete(obj conditions.Getter) bool
  • func (m Metrics) RecordCondition(ctx context.Context, obj conditions.Getter, conditionType string)
  • func (m Metrics) RecordDuration(ctx context.Context, obj conditions.Getter, startTime time.Time)
  • func (m Metrics) RecordReadiness(ctx context.Context, obj conditions.Getter)
  • func (m Metrics) RecordReconciling(ctx context.Context, obj conditions.Getter)
  • func (m Metrics) RecordStalled(ctx context.Context, obj conditions.Getter)
  • func (m Metrics) RecordSuspend(ctx context.Context, obj conditions.Getter, suspend bool)
• type RateLimiterOptions
  • func (o *RateLimiterOptions) BindFlags(fs *pflag.FlagSet)
• type WatchOptions
  • func (o *WatchOptions) BindFlags(fs *pflag.FlagSet)

Variables

var ErrInsecureHTTPBlocked = errors.New("use of insecure plain HTTP connections is blocked")

ErrInsecureHTTPBlocked signals that the use of insecure plain HTTP connections was requested but such behavior is blocked.

Functions

func GetDefaultRateLimiter

func GetDefaultRateLimiter() ratelimiter.RateLimiter

GetDefaultRateLimiter returns a new exponential failure ratelimiter.RateLimiter with the default configuration.

func GetRateLimiter

func GetRateLimiter(opts RateLimiterOptions) ratelimiter.RateLimiter

GetRateLimiter returns a new exponential failure ratelimiter.RateLimiter based on RateLimiterOptions.

func GetWatchLabelSelector

func GetWatchLabelSelector(opts WatchOptions) (*metav1.LabelSelector, error)

GetWatchLabelSelector parses the label selector option from WatchOptions and returns an error if the expression is invalid.

func GetWatchSelector

func GetWatchSelector(opts WatchOptions) (labels.Selector, error)

GetWatchSelector parses the label selector option from WatchOptions and returns the label selector. If the WatchOptions contain no selectors, then a match everything is returned.

Types

type ConnectionOptions

type ConnectionOptions struct {
	// AllowHTTP, if set to true allows the controller to make plain HTTP
	// connections to external services.
	AllowHTTP bool
}

ConnectionOptions defines the configurable options for outbound connections opened by reconcilers. Consumers are expected to check for compatibility via `CheckEnvironmentCompatibility()` before using its values.

func (*ConnectionOptions) BindFlags

func (o *ConnectionOptions) BindFlags(fs *pflag.FlagSet)

BindFlags will parse the given pflag.FlagSet for the controller and set the ConnectionOptions accordingly.

func (*ConnectionOptions) CheckEnvironmentCompatibility

func (o *ConnectionOptions) CheckEnvironmentCompatibility() error

CheckEnvironmentCompatibility checks if the environment is compatible with the configured connection options.

type Metrics

type Metrics struct {
	Scheme          *runtime.Scheme
	MetricsRecorder *metrics.Recorder
	// contains filtered or unexported fields
}

Metrics is a helper struct that adds the capability for recording GitOps Toolkit standard metrics to a reconciler.

Use it by embedding it in your reconciler struct:

	type MyTypeReconciler {
 	client.Client
     // ... etc.
     controller.Metrics
	}

Following the GitOps Toolkit conventions, API types used in GOTK SHOULD implement conditions.Getter to work with status condition types, and this convention MUST be followed to be able to record metrics using this helper.

Use MustMakeMetrics to create a working Metrics value; you can supply the same value to all reconcilers.

Once initialised, metrics can be recorded by calling one of the available `Record*` methods.

func NewMetrics

func NewMetrics(mgr ctrl.Manager, recorder *metrics.Recorder, finalizers ...string) Metrics

NewMetrics creates a new Metrics with the given metrics.Recorder, and the Metrics.Scheme set to that of the given mgr, along with an optional set of owned finalizers which is used to determine when an object is being deleted.

func (Metrics) DeleteCondition

func (m Metrics) DeleteCondition(ctx context.Context, obj conditions.Getter, conditionType string)

DeleteCondition deletes the condition metrics of the given conditionType for the given object.

func (Metrics) IsDelete

func (m Metrics) IsDelete(obj conditions.Getter) bool

IsDelete returns if the object is deleted by checking for deletion timestamp and owned finalizers in the object.

func (Metrics) RecordCondition

func (m Metrics) RecordCondition(ctx context.Context, obj conditions.Getter, conditionType string)

RecordCondition records the status of the given conditionType for the given obj.

func (Metrics) RecordDuration

func (m Metrics) RecordDuration(ctx context.Context, obj conditions.Getter, startTime time.Time)

RecordDuration records the duration of a reconcile attempt for the given obj based on the given startTime.

func (Metrics) RecordReadiness

func (m Metrics) RecordReadiness(ctx context.Context, obj conditions.Getter)

RecordReadiness records the meta.ReadyCondition status for the given obj.

func (Metrics) RecordReconciling

func (m Metrics) RecordReconciling(ctx context.Context, obj conditions.Getter)

RecordReconciling records the meta.ReconcilingCondition status for the given obj.

func (Metrics) RecordStalled

func (m Metrics) RecordStalled(ctx context.Context, obj conditions.Getter)

RecordStalled records the meta.StalledCondition status for the given obj.

func (Metrics) RecordSuspend

func (m Metrics) RecordSuspend(ctx context.Context, obj conditions.Getter, suspend bool)

RecordSuspend records the suspension of the given obj based on the given suspend value.

type RateLimiterOptions

type RateLimiterOptions struct {
	// MinRetryDelay represents the minimum amount of time in which an
	// object being reconciled will have to wait before a retry.
	MinRetryDelay time.Duration

	// MaxRetryDelay represents the maximum amount of time in which an
	// object being reconciled will have to wait before a retry.
	MaxRetryDelay time.Duration
}

RateLimiterOptions defines the configurable options for rate limiters used on reconcilers.

func (*RateLimiterOptions) BindFlags

func (o *RateLimiterOptions) BindFlags(fs *pflag.FlagSet)

BindFlags will parse the given pflag.FlagSet for the controller and set the RateLimiterOptions accordingly.

type WatchOptions

type WatchOptions struct {
	// AllNamespaces defines the watch filter at namespace level.
	// If set to false, the reconciler will only watch the runtime namespace for resource changes.
	AllNamespaces bool

	// LabelSelector defines the watch filter based on matching label expressions.
	// When set, the reconciler will only watch for changes of those resources with matching labels.
	// Docs: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#list-and-watch-filtering.
	LabelSelector string
}

WatchOptions defines the configurable options for reconciler resources watcher.

func (*WatchOptions) BindFlags

func (o *WatchOptions) BindFlags(fs *pflag.FlagSet)

BindFlags will parse the given pflag.FlagSet for the controller and set the WatchOptions accordingly.