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pubsub_config_controller.go
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pubsub_config_controller.go
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package pubsub
import (
"context"
"encoding/json"
"flag"
"fmt"
constraintclient "github.com/open-policy-agent/frameworks/constraint/pkg/client"
"github.com/open-policy-agent/frameworks/constraint/pkg/externaldata"
"github.com/open-policy-agent/gatekeeper/v3/pkg/expansion"
"github.com/open-policy-agent/gatekeeper/v3/pkg/logging"
"github.com/open-policy-agent/gatekeeper/v3/pkg/mutation"
"github.com/open-policy-agent/gatekeeper/v3/pkg/pubsub"
"github.com/open-policy-agent/gatekeeper/v3/pkg/readiness"
"github.com/open-policy-agent/gatekeeper/v3/pkg/util"
"github.com/open-policy-agent/gatekeeper/v3/pkg/watch"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/handler"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var (
PubsubEnabled = flag.Bool("enable-pub-sub", false, "Enabled pubsub to publish messages")
log = logf.Log.WithName("controller").WithValues(logging.Process, "pubsub_controller")
)
type Adder struct {
PubsubSystem *pubsub.System
}
func (a *Adder) Add(mgr manager.Manager) error {
if !*PubsubEnabled {
return nil
}
r := newReconciler(mgr, a.PubsubSystem)
return add(mgr, r)
}
func (a *Adder) InjectOpa(_ *constraintclient.Client) {}
func (a *Adder) InjectWatchManager(_ *watch.Manager) {}
func (a *Adder) InjectControllerSwitch(_ *watch.ControllerSwitch) {}
func (a *Adder) InjectTracker(_ *readiness.Tracker) {}
func (a *Adder) InjectMutationSystem(_ *mutation.System) {}
func (a *Adder) InjectExpansionSystem(_ *expansion.System) {}
func (a *Adder) InjectProviderCache(_ *externaldata.ProviderCache) {}
func (a *Adder) InjectPubsubSystem(pubsubSystem *pubsub.System) {
a.PubsubSystem = pubsubSystem
}
type Reconciler struct {
client.Client
scheme *runtime.Scheme
system *pubsub.System
}
func newReconciler(mgr manager.Manager, system *pubsub.System) *Reconciler {
return &Reconciler{
Client: mgr.GetClient(),
scheme: mgr.GetScheme(),
system: system,
}
}
func add(mgr manager.Manager, r reconcile.Reconciler) error {
c, err := controller.New("pubsub-config-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
return c.Watch(
source.Kind(mgr.GetCache(), &corev1.ConfigMap{}),
&handler.EnqueueRequestForObject{},
predicate.Funcs{
CreateFunc: func(e event.CreateEvent) bool {
return e.Object.GetNamespace() == util.GetNamespace()
},
UpdateFunc: func(e event.UpdateEvent) bool {
return e.ObjectNew.GetNamespace() == util.GetNamespace()
},
DeleteFunc: func(e event.DeleteEvent) bool {
return e.Object.GetNamespace() == util.GetNamespace()
},
GenericFunc: func(e event.GenericEvent) bool {
return e.Object.GetNamespace() == util.GetNamespace()
},
},
)
}
func (r *Reconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
log.Info("Reconcile", "request", request, "namespace", request.Namespace, "name", request.Name)
deleted := false
cfg := &corev1.ConfigMap{}
err := r.Get(ctx, request.NamespacedName, cfg)
if err != nil {
if !errors.IsNotFound(err) {
return reconcile.Result{}, err
}
deleted = true
}
if deleted {
err := r.system.CloseConnection(request.Name)
if err != nil {
return reconcile.Result{Requeue: true}, err
}
log.Info("removed connection", "name", request.Name)
return reconcile.Result{}, nil
}
if len(cfg.Data) == 0 {
return reconcile.Result{}, fmt.Errorf(fmt.Sprintf("data missing in configmap %s, unable to configure respective pubsub", request.NamespacedName))
}
if _, ok := cfg.Data["provider"]; !ok {
return reconcile.Result{}, fmt.Errorf(fmt.Sprintf("missing provider field in configmap %s, unable to configure respective pubsub", request.NamespacedName))
}
var config interface{}
err = json.Unmarshal([]byte(cfg.Data["config"]), &config)
if err != nil {
return reconcile.Result{}, err
}
err = r.system.UpsertConnection(ctx, config, request.Name, cfg.Data["provider"])
if err != nil {
return reconcile.Result{}, err
}
log.Info("Connection upsert successful", "name", request.Name, "provider", cfg.Data["provider"])
return reconcile.Result{}, nil
}