reconciler

package
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 Go to latest Published: May 29, 2024 License: Apache-2.0 Imports: 50 Imported by: 0

Documentation

Overview

Package common contains reconciliation helpers shared between target reconcilers.

Index

Constants

View Source 
const (
	EnvName      = "NAME"
	EnvNamespace = "NAMESPACE"

	// Overrides for CloudEvents context attributes (only supported by a subset of components)
	EnvCESource = "CE_SOURCE"
	EnvCEType   = "CE_TYPE"

	// Common AWS attributes
	EnvARN             = "ARN"
	EnvAccessKeyID     = "AWS_ACCESS_KEY_ID"
	EnvSecretAccessKey = "AWS_SECRET_ACCESS_KEY" //nolint:gosec
	EnvSessionToken    = "AWS_SESSION_TOKEN"
	EnvEndpointURL     = "AWS_ENDPOINT_URL"
	EnvAssumeIamRole   = "AWS_ASSUME_ROLE_ARN"

	// Common Azure attributes
	EnvAADTenantID     = "AZURE_TENANT_ID"
	EnvAADClientID     = "AZURE_CLIENT_ID"
	EnvAADClientSecret = "AZURE_CLIENT_SECRET"

	// Azure Event Hub attributes
	// https://pkg.go.dev/github.com/Azure/azure-event-hubs-go/v3#readme-environment-variables
	EnvHubNamespace        = "EVENTHUB_NAMESPACE"
	EnvHubName             = "EVENTHUB_NAME"
	EnvHubKeyName          = "EVENTHUB_KEY_NAME"
	EnvHubKeyValue         = "EVENTHUB_KEY_VALUE"
	EnvHubConnStr          = "EVENTHUB_CONNECTION_STRING"
	EnvHubResourceID       = "EVENTHUB_RESOURCE_ID"
	EnvHubConsumerGroup    = "EVENTHUB_CONSUMER_GROUP"
	EnvHubMessageTimeout   = "EVENTHUB_MESSAGE_TIMEOUT"
	EnvHubMessageCountSize = "EVENTHUB_MESSAGE_COUNT_SIZE"

	// Azure Service Bus attributes
	EnvServiceBusKeyName          = "SERVICEBUS_KEY_NAME"
	EnvServiceBusKeyValue         = "SERVICEBUS_KEY_VALUE"
	EnvServiceBusConnStr          = "SERVICEBUS_CONNECTION_STRING"
	EnvServiceBusEntityResourceID = "SERVICEBUS_ENTITY_RESOURCE_ID"
	EnvServiceBusWebSocketsEnable = "SERVICEBUS_WEBSOCKETS_ENABLE"
	EnvServiceBusMaxConcurrent    = "SERVICEBUS_MAX_CONCURRENT"

	// Common Google Cloud attributes
	EnvGCloudSAKey = "GCLOUD_SERVICEACCOUNT_KEY"

	// Google Cloud Pub/Sub attributes
	EnvGCloudPubSubSubscription = "GCLOUD_PUBSUB_SUBSCRIPTION"
)

Common environment variables propagated to adapters.

View Source 
const (
	// ReasonRBACCreate indicates that an RBAC object was successfully created.
	ReasonRBACCreate = "CreateRBAC"
	// ReasonRBACUpdate indicates that an RBAC object was successfully updated.
	ReasonRBACUpdate = "UpdateRBAC"
	// ReasonFailedRBACCreate indicates that the creation of an RBAC object failed.
	ReasonFailedRBACCreate = "FailedRBACCreate"
	// ReasonFailedRBACUpdate indicates that the update of an RBAC object failed.
	ReasonFailedRBACUpdate = "FailedRBACUpdate"

	// ReasonAdapterCreate indicates that an adapter object was successfully created.
	ReasonAdapterCreate = "CreateAdapter"
	// ReasonAdapterUpdate indicates that an adapter object was successfully updated.
	ReasonAdapterUpdate = "UpdateAdapter"
	// ReasonFailedAdapterCreate indicates that the creation of an adapter object failed.
	ReasonFailedAdapterCreate = "FailedAdapterCreate"
	// ReasonFailedAdapterUpdate indicates that the update of an adapter object failed.
	ReasonFailedAdapterUpdate = "FailedAdapterUpdate"

	// ReasonBadSinkURI indicates that the URI of a sink can't be determined.
	ReasonBadSinkURI = "BadSinkURI"

	// ReasonInvalidSpec indicates that spec of a reconciled object is invalid.
	ReasonInvalidSpec = "InvalidSpec"
)

Reasons for API Events

View Source 
const (
	LabelBridgeUsedByPrefix  = "flow.typhoon.zeiss.com/used-by."
	LabelValueBridgeDominant = "dominant"

	// Bridge identifier for stateful flows
	EnvBridgeID = "EVENTS_BRIDGE_IDENTIFIER"
)

Stateful events related

Variables

View Source 
var CommonObjectLabels = TMCommonObjectLabels

CommonObjectLabels set of labels which are always applied to resource objects reconciled for the given component type.

Functions

func ComponentName 

func ComponentName(o kmeta.OwnerRefable) string

ComponentName returns the component name for the given object.

func CreateCloudEventAttributes 

func CreateCloudEventAttributes(source string, eventTypes []string) []duckv1.CloudEventAttributes

CreateCloudEventAttributes returns CloudEvent attributes for the event types supported by the target.

func EnqueueObjectsInNamespaceOf 

func EnqueueObjectsInNamespaceOf(inf cache.SharedInformer, resyncFn filteredGlobalResyncFunc,
	logger *zap.SugaredLogger,
) func(interface{})

EnqueueObjectsInNamespaceOf accepts an object and triggers a global resync of all objects in the given informer matching that object's namespace. Intended to be used to resync objects when the state of their (common) multi-tenant adapter changes.

func GetStatefulBridgeID 

func GetStatefulBridgeID(object metav1.Object) string

GetStatefulBridgeID returns the BridgeID based on an object metadata.

All bridge components controlled by Triggerflow have labels informing their relation with the bridges they are part of. A component can only have one dominant bridge, which is the one it synchronizes with. This function uses that label to retrieve the bridge name and use it as unique ID.

func MTAdapterObjectName 

func MTAdapterObjectName(o kmeta.OwnerRefable) string

MTAdapterObjectName returns a unique name to apply to all objects related to the given component's multi-tenant adapter (RBAC, Deployment/KnService, ...).

func MaybeAppendValueFromEnvVar 

func MaybeAppendValueFromEnvVar(envs []corev1.EnvVar, key string, valueFrom v1alpha1.ValueFromField) []corev1.EnvVar

MaybeAppendValueFromEnvVar conditionally appends an EnvVar to env based on the contents of valueFrom. ValueFromSecret takes precedence over Value in case the API didn't reject the object despite the CRD's schema validation

func NewAdapterDeployment 

func NewAdapterDeployment(rcl v1alpha1.Reconcilable, sinkURI *apis.URL, opts ...resource.ObjectOption) *appsv1.Deployment

NewAdapterDeployment is a wrapper around resource.NewDeployment which pre-populates attributes common to all adapters backed by a Deployment.

func NewAdapterKnService 

func NewAdapterKnService(rcl v1alpha1.Reconcilable, sinkURI *apis.URL, opts ...resource.ObjectOption) *servingv1.Service

NewAdapterKnService is a wrapper around resource.NewKnService which pre-populates attributes common to all adapters backed by a Knative Service.

func NewMTAdapterDeployment 

func NewMTAdapterDeployment(rcl v1alpha1.Reconcilable, opts ...resource.ObjectOption) *appsv1.Deployment

NewMTAdapterDeployment is a wrapper around resource.NewDeployment which pre-populates attributes common to all multi-tenant adapters backed by a Deployment.

func NewMTAdapterKnService 

func NewMTAdapterKnService(rcl v1alpha1.Reconcilable, opts ...resource.ObjectOption) *servingv1.Service

NewMTAdapterKnService is a wrapper around resource.NewKnService which pre-populates attributes common to all multi-tenant adapters backed by a Knative Service.

func OwnByServiceAccount 

func OwnByServiceAccount(obj metav1.Object, owner *corev1.ServiceAccount)

OwnByServiceAccount sets the owner of obj to the given ServiceAccount.

func ServiceAccountName 

func ServiceAccountName(rcl v1alpha1.Reconcilable) string

ServiceAccountName returns the name to set on the ServiceAccount associated with the given component instance.

func TMCommonObjectLabels 

func TMCommonObjectLabels(o kmeta.OwnerRefable) labels.Set

TMCommonObjectLabels ...

Types

type AdapterBuilder 

type AdapterBuilder[T metav1.Object] interface {
	BuildAdapter(rcl v1alpha1.Reconcilable, sinkURI *apis.URL) (T, error)
}

AdapterBuilder provides all the necessary information for building a component's adapter object.

type GenericDeploymentReconciler 

type GenericDeploymentReconciler[T kmeta.OwnerRefable, L Lister[T]] struct {
	// URI resolver for sinks
	SinkResolver *resolver.URIResolver
	// API clients
	Client k8sClientGetter[*appsv1.Deployment, appsclientv1.DeploymentInterface]
	// objects listers
	Lister    func(namespace string) appslistersv1.DeploymentNamespaceLister
	PodLister func(namespace string) corelistersv1.PodNamespaceLister

	*GenericRBACReconciler[T, L]
}

GenericDeploymentReconciler contains interfaces shared across Deployment reconcilers.

func NewGenericDeploymentReconciler 

func NewGenericDeploymentReconciler[T kmeta.OwnerRefable, L Lister[T]](ctx context.Context, gvk schema.GroupVersionKind,
	tracker tracker.Interface,
	adapterHandlerFn func(obj interface{}),
	ownersLister ListerGetter[T, L],
) GenericDeploymentReconciler[T, L]

NewGenericDeploymentReconciler creates a new GenericDeploymentReconciler and attaches a default event handler to its Deployment informer.

func (*GenericDeploymentReconciler[T, L]) ReconcileAdapter 

func (r *GenericDeploymentReconciler[T, L]) ReconcileAdapter(ctx context.Context,
	ab AdapterBuilder[*appsv1.Deployment],
) reconciler.Event

ReconcileAdapter reconciles a receive adapter for a component instance.

type GenericRBACReconciler 

type GenericRBACReconciler[T kmeta.OwnerRefable, L Lister[T]] struct {
	// API clients
	SAClient func(namespace string) coreclientv1.ServiceAccountInterface
	RBClient func(namespace string) rbacclientv1.RoleBindingInterface
	// objects listers
	SALister     func(namespace string) corelistersv1.ServiceAccountNamespaceLister
	RBLister     func(namespace string) rbaclistersv1.RoleBindingNamespaceLister
	OwnersLister ListerGetter[T, L]
}

GenericRBACReconciler reconciles RBAC objects for components adapters.

func NewGenericRBACReconciler 

func NewGenericRBACReconciler[T kmeta.OwnerRefable, L Lister[T]](ctx context.Context,
	ownersLister ListerGetter[T, L],
) *GenericRBACReconciler[T, L]

NewGenericRBACReconciler creates a new GenericRBACReconciler.

type GenericServiceReconciler 

type GenericServiceReconciler[T kmeta.OwnerRefable, L Lister[T]] struct {
	// URI resolver for sinks
	SinkResolver *resolver.URIResolver
	// API clients
	Client k8sClientGetter[*servingv1.Service, servingclientv1.ServiceInterface]
	// objects listers
	Lister func(namespace string) servinglistersv1.ServiceNamespaceLister

	*GenericRBACReconciler[T, L]
}

GenericServiceReconciler contains interfaces shared across Service reconcilers.

func NewGenericServiceReconciler 

func NewGenericServiceReconciler[T kmeta.OwnerRefable, L Lister[T]](ctx context.Context, gvk schema.GroupVersionKind,
	tracker tracker.Interface,
	adapterHandlerFn func(obj interface{}),
	ownersLister ListerGetter[T, L],
) GenericServiceReconciler[T, L]

NewGenericServiceReconciler creates a new GenericServiceReconciler and attaches a default event handler to its Service informer.

func NewMTGenericServiceReconciler 

func NewMTGenericServiceReconciler[T kmeta.OwnerRefable, L Lister[T]](ctx context.Context, typ kmeta.OwnerRefable,
	tracker tracker.Interface,
	adapterHandlerFn func(obj interface{}),
	ownersLister ListerGetter[T, L],
) GenericServiceReconciler[T, L]

NewMTGenericServiceReconciler creates a new GenericServiceReconciler for a multi-tenant adapter and attaches a default event handler to its Service informer.

func (*GenericServiceReconciler[T, L]) ReconcileAdapter 

func (r *GenericServiceReconciler[T, L]) ReconcileAdapter(ctx context.Context,
	ab AdapterBuilder[*servingv1.Service],
) reconciler.Event

ReconcileAdapter reconciles a receive adapter for a component instance.

type Lister 

type Lister[T kmeta.OwnerRefable] interface {
	List(labels.Selector) ([]T, error)
}

Lister is a partial generic version of a typed <Kind>NamespaceLister interface (usually generated by lister-gen).

type ListerGetter 

type ListerGetter[T kmeta.OwnerRefable, L Lister[T]] func(namespace string) L

ListerGetter obtains a namespaced Lister. 

We deliberately use the signature
  func[T, L Lister[T]] func(namespace string) L
instead of
  func[T] func(namespace string) Lister[T]

Although both are functionally equivalent, the second form doesn't allow us to instantiate
GenericRBACReconciler structs directly using the typed <Kind>NamespaceLister interfaces
generated by lister-gen. Attempting to do so yields the following compiler error:

  cannot use informer.Lister().<Kind> (value of type func(namespace string) v1alpha1.<Kind>NamespaceLister)
    as type ListerGetter[*v1alpha1.<Kind>]

Callers can circumvent this limitation by wrapping a typed lister getter inside a function
to make it generic:

  func(namespace string) common.Lister[*v1alpha1.<Kind>] {
      return informer.Lister().<Kind>(namespace)
  }

but this places the burden on the caller instead of on the compiler, which is suboptimal.

With the first form, however, <Kind>NamespaceLister interfaces are handled as generic
types without requiring an explicit conversion by the caller.

Source Files

View all Source files

Directories

Path Synopsis
Package event contains functions for generating Kubernetes API events.
 Package event contains functions for generating Kubernetes API events.
Package resource contains helpers to generate Kubernetes API objects.
 Package resource contains helpers to generate Kubernetes API objects.
Package skip allows a Context to carry the intention to skip parts of the code execution.
 Package skip allows a Context to carry the intention to skip parts of the code execution.

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