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base.go
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base.go
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/*
Copyright (c) 2020-2021 TriggerMesh Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package common
import (
"context"
"go.uber.org/zap"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
appsclientv1 "k8s.io/client-go/kubernetes/typed/apps/v1"
coreclientv1 "k8s.io/client-go/kubernetes/typed/core/v1"
rbacclientv1 "k8s.io/client-go/kubernetes/typed/rbac/v1"
appslistersv1 "k8s.io/client-go/listers/apps/v1"
corelistersv1 "k8s.io/client-go/listers/core/v1"
rbaclistersv1 "k8s.io/client-go/listers/rbac/v1"
"k8s.io/client-go/tools/cache"
k8sclient "knative.dev/pkg/client/injection/kube/client"
deploymentinformerv1 "knative.dev/pkg/client/injection/kube/informers/apps/v1/deployment"
sainformerv1 "knative.dev/pkg/client/injection/kube/informers/core/v1/serviceaccount"
rbinformerv1 "knative.dev/pkg/client/injection/kube/informers/rbac/v1/rolebinding"
"knative.dev/pkg/controller"
"knative.dev/pkg/kmeta"
"knative.dev/pkg/resolver"
servingclientv1 "knative.dev/serving/pkg/client/clientset/versioned/typed/serving/v1"
servingclient "knative.dev/serving/pkg/client/injection/client"
serviceinformerv1 "knative.dev/serving/pkg/client/injection/informers/serving/v1/service"
servinglistersv1 "knative.dev/serving/pkg/client/listers/serving/v1"
)
// GenericDeploymentReconciler contains interfaces shared across Deployment reconcilers.
type GenericDeploymentReconciler struct {
// URI resolver for sinks
SinkResolver *resolver.URIResolver
// API clients
Client func(namespace string) appsclientv1.DeploymentInterface
PodClient func(namespace string) coreclientv1.PodInterface
// objects listers
Lister func(namespace string) appslistersv1.DeploymentNamespaceLister
*GenericRBACReconciler
}
// GenericServiceReconciler contains interfaces shared across Service reconcilers.
type GenericServiceReconciler struct {
// URI resolver for sinks
SinkResolver *resolver.URIResolver
// API clients
Client func(namespace string) servingclientv1.ServiceInterface
// objects listers
Lister func(namespace string) servinglistersv1.ServiceNamespaceLister
*GenericRBACReconciler
}
// GenericRBACReconciler reconciles RBAC objects for source adapters.
type GenericRBACReconciler 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
}
// NewGenericDeploymentReconciler creates a new GenericDeploymentReconciler and
// attaches a default event handler to its Deployment informer.
func NewGenericDeploymentReconciler(ctx context.Context, gvk schema.GroupVersionKind,
resolverCallback func(types.NamespacedName),
adapterHandlerFn func(obj interface{}),
) GenericDeploymentReconciler {
informer := deploymentinformerv1.Get(ctx)
r := GenericDeploymentReconciler{
SinkResolver: resolver.NewURIResolver(ctx, resolverCallback),
Client: k8sclient.Get(ctx).AppsV1().Deployments,
PodClient: k8sclient.Get(ctx).CoreV1().Pods,
Lister: informer.Lister().Deployments,
GenericRBACReconciler: NewGenericRBACReconciler(ctx),
}
informer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: controller.FilterControllerGVK(gvk),
Handler: controller.HandleAll(adapterHandlerFn),
})
return r
}
// NewGenericServiceReconciler creates a new GenericServiceReconciler and
// attaches a default event handler to its Service informer.
func NewGenericServiceReconciler(ctx context.Context, gvk schema.GroupVersionKind,
resolverCallback func(types.NamespacedName),
adapterHandlerFn func(obj interface{}),
) GenericServiceReconciler {
serviceinformerv1.Get(ctx).Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: controller.FilterControllerGVK(gvk),
Handler: controller.HandleAll(adapterHandlerFn),
})
return newGenericServiceReconciler(ctx, resolverCallback)
}
// NewMTGenericServiceReconciler creates a new GenericServiceReconciler for a
// multi-tenant adapter and attaches a default event handler to its Service
// informer.
func NewMTGenericServiceReconciler(ctx context.Context, typ kmeta.OwnerRefable,
resolverCallback func(types.NamespacedName),
adapterHandlerFn func(obj interface{}),
) GenericServiceReconciler {
serviceinformerv1.Get(ctx).Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: hasAdapterLabelsForType(typ),
Handler: controller.HandleAll(adapterHandlerFn),
})
return newGenericServiceReconciler(ctx, resolverCallback)
}
// NewGenericRBACReconciler creates a new GenericRBACReconciler.
func NewGenericRBACReconciler(ctx context.Context) *GenericRBACReconciler {
return &GenericRBACReconciler{
SAClient: k8sclient.Get(ctx).CoreV1().ServiceAccounts,
RBClient: k8sclient.Get(ctx).RbacV1().RoleBindings,
SALister: sainformerv1.Get(ctx).Lister().ServiceAccounts,
RBLister: rbinformerv1.Get(ctx).Lister().RoleBindings,
}
}
// newMTGenericServiceReconciler creates a new GenericServiceReconciler.
func newGenericServiceReconciler(ctx context.Context,
resolverCallback func(types.NamespacedName),
) GenericServiceReconciler {
return GenericServiceReconciler{
SinkResolver: resolver.NewURIResolver(ctx, resolverCallback),
Client: servingclient.Get(ctx).ServingV1().Services,
Lister: serviceinformerv1.Get(ctx).Lister().Services,
GenericRBACReconciler: NewGenericRBACReconciler(ctx),
}
}
// filteredGlobalResyncFunc is a function that enqueues all objects from the
// given informer that pass the provided filter function.
type filteredGlobalResyncFunc func(func(interface{}) bool, cache.SharedInformer)
// objectFilterFunc is a filtering function for filteredGlobalResyncFunc.
type objectFilterFunc func(interface{}) bool
// hasAdapterLabelsForType returns a function that filters based on standard
// labels applied to all adapters of the given source type.
func hasAdapterLabelsForType(typ kmeta.OwnerRefable) objectFilterFunc {
return func(obj interface{}) bool {
object, ok := obj.(metav1.Object)
if !ok {
return false
}
ls := CommonObjectLabels(typ).AsSelectorPreValidated()
return ls.Matches(labels.Set(object.GetLabels()))
}
}
// isInNamespace returns a function that filters all objects which are not in
// the given namespace.
func isInNamespace(ns string) objectFilterFunc {
return func(obj interface{}) bool {
object := obj.(metav1.Object)
return object.GetNamespace() == ns
}
}
// 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 source objects when the state of their
// (common) multi-tenant adapter changes.
func EnqueueObjectsInNamespaceOf(inf cache.SharedInformer, resyncFn filteredGlobalResyncFunc,
logger *zap.SugaredLogger) func(interface{}) {
return func(obj interface{}) {
adapter, err := kmeta.DeletionHandlingAccessor(obj)
if err != nil {
logger.Error(err)
return
}
resyncFn(isInNamespace(adapter.GetNamespace()), inf)
}
}