simple

Documentation

Index

• Constants
• func SetTraceProvider(cfg OpenTelemetryConfig) error
• type ListWatchOptions
• type MetricsConfig
• type OTelConnType
• type OpenTelemetryConfig
• type Operator
  • func NewOperator(cfg OperatorConfig) (*Operator, error)
  • func (o *Operator) ClientGenerator() resource.ClientGenerator
  • func (o *Operator) ConvertKind(gk metav1.GroupKind, converter k8s.Converter) error
  • func (o *Operator) MutateKind(kind resource.Kind, controller resource.MutatingAdmissionController) error
  • func (o *Operator) ReconcileKind(kind resource.Kind, reconciler operator.Reconciler, options ListWatchOptions) error
  • func (o *Operator) RegisterMetricsCollectors(collectors ...prometheus.Collector) error
  • func (o *Operator) Run(stopCh <-chan struct{}) error
  • func (o *Operator) ValidateKind(kind resource.Kind, controller resource.ValidatingAdmissionController) error
  • func (o *Operator) WatchKind(kind resource.Kind, watcher SyncWatcher, options ListWatchOptions) error
• type OperatorConfig
• type Reconciler
  • func (s *Reconciler) Reconcile(ctx context.Context, req operator.ReconcileRequest) (operator.ReconcileResult, error)
• type SyncWatcher
• type TracingConfig
• type Watcher
  • func (w *Watcher) Add(ctx context.Context, object resource.Object) error
  • func (w *Watcher) Delete(ctx context.Context, object resource.Object) error
  • func (w *Watcher) Sync(ctx context.Context, object resource.Object) error
  • func (w *Watcher) Update(ctx context.Context, old resource.Object, new resource.Object) error
• type WebhookConfig

Constants

const (
	OTelConnTypeGRPC = OTelConnType("grpc")
	OTelConnTypeHTTP = OTelConnType("http")
)

Functions

func SetTraceProvider

func SetTraceProvider(cfg OpenTelemetryConfig) error

SetTraceProvider creates a trace.TracerProvider and sets it as the global TracerProvider which is used by default for all app-sdk packages unless overridden.

Types

type ListWatchOptions

type ListWatchOptions struct {
	Namespace    string
	LabelFilters []string
}

type MetricsConfig

type MetricsConfig struct {
	metrics.ExporterConfig
	Enabled   bool
	Namespace string
}

MetricsConfig contains configuration information for exposing prometheus metrics

type OTelConnType

type OTelConnType string

type OpenTelemetryConfig

type OpenTelemetryConfig struct {
	Host        string
	Port        int
	ConnType    OTelConnType
	ServiceName string
}

type Operator

type Operator struct {
	Name string
	// ErrorHandler, if non-nil, is called when a recoverable error is encountered in underlying components.
	// This is typically used for logging and/or metrics.
	ErrorHandler func(ctx context.Context, err error)
	// contains filtered or unexported fields
}

Operator is a simple operator implementation. Instead of manually registering controllers like with operator.Operator, use WatchKind to add a watcher for a specific kind (schema) and configuration (such as namespace, label filters), ReconcileKind to add a reconciler for a specific kind (schema) and configuration (such as namespace, label filers), and ValidateKind or MutateKind to add admission control for a kind (schema).

func NewOperator

func NewOperator(cfg OperatorConfig) (*Operator, error)

NewOperator creates a new Operator

func (*Operator) ClientGenerator

func (o *Operator) ClientGenerator() resource.ClientGenerator

ClientGenerator returns the ClientGenerator used by the Operator for getting clients for a particular schema

func (*Operator) ConvertKind

func (o *Operator) ConvertKind(gk metav1.GroupKind, converter k8s.Converter) error

ConvertKind provides a conversion path for the provided GroupKind in the converting webhook, using the provided k8s.Converter for the conversion logic.

func (*Operator) MutateKind

func (o *Operator) MutateKind(kind resource.Kind, controller resource.MutatingAdmissionController) error

MutateKind provides a mutation path for the provided kind (schema) in the mutating webhook, using the provided MutatingAdmissionController for the mutation logic.

func (*Operator) ReconcileKind

func (o *Operator) ReconcileKind(kind resource.Kind, reconciler operator.Reconciler, options ListWatchOptions) error

ReconcileKind will watch the specified kind (schema) with opinionated logic, passing the events on to the provided Reconciler. You can configure the query used for watching the kind using ListWatchOptions.

func (*Operator) RegisterMetricsCollectors

func (o *Operator) RegisterMetricsCollectors(collectors ...prometheus.Collector) error

RegisterMetricsCollectors registers Prometheus collectors with the exporter used by the operator, and will expose those metrics via the metrics endpoint configured in the operator config on Operator.Run

func (*Operator) Run

func (o *Operator) Run(stopCh <-chan struct{}) error

Run will start the operator and run until stopCh is closed or receives message. While running, the operator will:

* Watch/Reconcile all configured resources

* Expose all configured webhooks as an HTTPS server

* Expose a prometheus metrics endpoint if configured

func (*Operator) ValidateKind

func (o *Operator) ValidateKind(kind resource.Kind, controller resource.ValidatingAdmissionController) error

ValidateKind provides a validation path for the provided kind (schema) in the validating webhook, using the provided ValidatingAdmissionController for the validation logic.

func (*Operator) WatchKind

func (o *Operator) WatchKind(kind resource.Kind, watcher SyncWatcher, options ListWatchOptions) error

WatchKind will watch the specified kind (schema) with opinionated logic, passing the relevant events on to the SyncWatcher. You can configure the query used for watching the kind using ListWatchOptions.

type OperatorConfig

type OperatorConfig struct {
	Name         string
	KubeConfig   rest.Config
	Webhooks     WebhookConfig
	Metrics      MetricsConfig
	Tracing      TracingConfig
	ErrorHandler func(ctx context.Context, err error)
}

OperatorConfig is used to configure an Operator on creation

type Reconciler

type Reconciler struct {
	ReconcileFunc func(context.Context, operator.ReconcileRequest) (operator.ReconcileResult, error)
}

Reconciler is a simple Reconciler implementation that calls ReconcileFunc if non-nil on Reconcile requests.

func (*Reconciler) Reconcile

func (s *Reconciler) Reconcile(ctx context.Context, req operator.ReconcileRequest) (operator.ReconcileResult, error)

Reconcile calls ReconcileFunc if non-nil and returns the response, or returns an empty ReconcileResult and nil error if ReconcileFunc is nil.

type SyncWatcher

type SyncWatcher interface {
	operator.ResourceWatcher
	// Sync is called for resources which _may_ have experienced updates
	Sync(context.Context, resource.Object) error
}

SyncWatcher extends operator.ResourceWatcher with a Sync method which can be called by the operator.OpinionatedWatcher

type TracingConfig

type TracingConfig struct {
	Enabled bool
	OpenTelemetryConfig
}

TracingConfig contains configuration information for OpenTelemetry tracing

type Watcher

type Watcher struct {
	AddFunc    func(context.Context, resource.Object) error
	UpdateFunc func(context.Context, resource.Object, resource.Object) error
	DeleteFunc func(context.Context, resource.Object) error
	SyncFunc   func(context.Context, resource.Object) error
}

Watcher is a struct that implements operator.ResourceWatcher and SyncWatcher, but takes no action on its own. For each method in (Add, Update, Delete) the corresponding exported function field is called, if non-nil.

func (*Watcher) Add

func (w *Watcher) Add(ctx context.Context, object resource.Object) error

Add calls AddFunc, if non-nil

func (*Watcher) Delete

func (w *Watcher) Delete(ctx context.Context, object resource.Object) error

Delete calls DeleteFunc, if non-nil

func (*Watcher) Sync

func (w *Watcher) Sync(ctx context.Context, object resource.Object) error

Sync calls SyncFunc, if non-nil

func (*Watcher) Update

func (w *Watcher) Update(ctx context.Context, old resource.Object, new resource.Object) error

Update calls UpdateFunc, if non-nil

type WebhookConfig

type WebhookConfig struct {
	Enabled bool
	// Port is the port to open the webhook server on
	Port int
	// TLSConfig is the TLS Cert and Key to use for the HTTPS endpoints exposed for webhooks
	TLSConfig k8s.TLSConfig
	// DefaultValidator is an optional Default ValidatingAdmissionController to use if a specific one for the incoming
	// kind cannot be found
	DefaultValidator resource.ValidatingAdmissionController
	// DefaultMutator is an optional Default MutatingAdmissionController to use if a specific one for the incoming
	// kind cannot be found
	DefaultMutator resource.MutatingAdmissionController
	// Validators is an optional map of schema => ValidatingAdmissionController to use for the schema on admission.
	// This can be empty or nil and specific ValidatingAdmissionControllers can be set later with Operator.ValidateKind
	Validators map[*resource.Kind]resource.ValidatingAdmissionController
	// Mutators is an optional map of schema => MutatingAdmissionController to use for the schema on admission.
	// This can be empty or nil and specific MutatingAdmissionControllers can be set later with Operator.MutateKind
	Mutators map[*resource.Kind]resource.MutatingAdmissionController
	// Converters is an optional map of GroupKind => Converter to use for CRD version conversion requests.
	// This can be empty or nil and specific MutatingAdmissionControllers can be set later with Operator.MutateKind
	Converters map[metav1.GroupKind]k8s.Converter
}

WebhookConfig is a configuration for exposed kubernetes webhooks for an Operator