forked from openshift-knative/serverless-operator
/
knativeserving_controller.go
428 lines (368 loc) · 15.2 KB
/
knativeserving_controller.go
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package knativeserving
import (
"context"
"fmt"
"os"
"github.com/openshift-knative/serverless-operator/knative-operator/pkg/common"
"github.com/openshift-knative/serverless-operator/knative-operator/pkg/controller/knativeserving/consoleclidownload"
"github.com/openshift-knative/serverless-operator/knative-operator/pkg/controller/knativeserving/dashboard"
"github.com/openshift-knative/serverless-operator/knative-operator/pkg/controller/knativeserving/kourier"
consolev1 "github.com/openshift/api/console/v1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
servingv1alpha1 "knative.dev/operator/pkg/apis/operator/v1alpha1"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
const (
ingressClassKey = "networking.knative.dev/ingress.class"
istioIngressClass = "istio.ingress.networking.knative.dev"
// This needs to remain "knative-serving-openshift" to be compatible with earlier versions.
finalizerName = "knative-serving-openshift"
// serviceCAKey is an annotation key to trigger Openshift to populate service-ca certs to the
// ConfigMap carrying the annotation.
// Docs: https://github.com/openshift/service-ca-operator
serviceCAKey = "service.alpha.openshift.io/inject-cabundle"
// trustedCAKey is a label key to trigger Openshift to populate trusted CA certs to the
// ConfigMap carrying the label. This includes CA certs specified in cluster-wide proxy settings.
// Docs: https://docs.openshift.com/container-platform/4.3/networking/configuring-a-custom-pki.html#certificate-injection-using-operators_configuring-a-custom-pki
trustedCAKey = "config.openshift.io/inject-trusted-cabundle"
// certVersionKey is an annotation key used by the Serverless operator to annotate the Knative Serving
// controller's PodTemplate to make it redeploy on certificate changes.
certVersionKey = "serving.knative.openshift.io/mounted-cert-version"
)
var log = common.Log.WithName("controller")
// Add creates a new KnativeServing Controller and adds it to the Manager. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
return &ReconcileKnativeServing{client: mgr.GetClient(), scheme: mgr.GetScheme()}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("knativeserving-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource KnativeServing
err = c.Watch(&source.Kind{Type: &servingv1alpha1.KnativeServing{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
// Watch for changes to owned ConfigMaps
err = c.Watch(&source.Kind{Type: &corev1.ConfigMap{}}, &handler.EnqueueRequestForOwner{
OwnerType: &servingv1alpha1.KnativeServing{},
IsController: true,
})
if err != nil {
return err
}
// common function to enqueue reconcile requests for resources
enqueueRequests := handler.ToRequestsFunc(func(obj handler.MapObject) []reconcile.Request {
annotations := obj.Meta.GetAnnotations()
ownerNamespace := annotations[common.ServingOwnerNamespace]
ownerName := annotations[common.ServingOwnerName]
if ownerNamespace != "" && ownerName != "" {
return []reconcile.Request{{
NamespacedName: types.NamespacedName{Namespace: ownerNamespace, Name: ownerName},
}}
}
return nil
})
// Watch for Kourier resources.
manifest, err := kourier.RawManifest(mgr.GetClient())
if err != nil {
return err
}
resources := manifest.Resources()
gvkToKourier := make(map[schema.GroupVersionKind]runtime.Object)
for i := range resources {
resource := &resources[i]
gvkToKourier[resource.GroupVersionKind()] = resource
}
for _, t := range gvkToKourier {
err = c.Watch(&source.Kind{Type: t}, &handler.EnqueueRequestsFromMapFunc{ToRequests: enqueueRequests})
if err != nil {
return err
}
}
// Watch for kn ConsoleCLIDownload resources
knManifest, err := consoleclidownload.RawManifest(mgr.GetClient())
if err != nil {
return err
}
knResources := knManifest.Resources()
gvkToCCD := make(map[schema.GroupVersionKind]runtime.Object)
for i := range knResources {
resource := &knResources[i]
gvkToCCD[resource.GroupVersionKind()] = resource
}
// append ConsoleCLIDownload type as well to Watch for kn CCD CO
gvkToCCD[consolev1.GroupVersion.WithKind("ConsoleCLIDownload")] = &consolev1.ConsoleCLIDownload{}
for _, t := range gvkToCCD {
err = c.Watch(&source.Kind{Type: t}, &handler.EnqueueRequestsFromMapFunc{ToRequests: enqueueRequests})
if err != nil {
return err
}
}
return nil
}
// blank assignment to verify that ReconcileKnativeServing implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileKnativeServing{}
// ReconcileKnativeServing reconciles a KnativeServing object
type ReconcileKnativeServing struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client client.Client
scheme *runtime.Scheme
}
// Reconcile reads that state of the cluster for a KnativeServing
func (r *ReconcileKnativeServing) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Reconciling KnativeServing")
// Fetch the KnativeServing instance
original := &servingv1alpha1.KnativeServing{}
err := r.client.Get(context.TODO(), request.NamespacedName, original)
if err != nil {
if errors.IsNotFound(err) {
return reconcile.Result{}, nil
}
return reconcile.Result{}, err
}
if original.GetDeletionTimestamp() != nil {
return reconcile.Result{}, r.delete(original)
}
instance := original.DeepCopy()
reconcileErr := r.reconcileKnativeServing(instance)
if !equality.Semantic.DeepEqual(original.Status, instance.Status) {
if err := r.client.Status().Update(context.TODO(), instance); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to update status: %w", err)
}
}
if instance.Status.IsReady() {
common.KnativeServingUpG.Set(1)
} else {
common.KnativeServingUpG.Set(0)
}
return reconcile.Result{}, reconcileErr
}
func (r *ReconcileKnativeServing) reconcileKnativeServing(instance *servingv1alpha1.KnativeServing) error {
stages := []func(*servingv1alpha1.KnativeServing) error{
r.configure,
r.ensureFinalizers,
r.ensureCustomCertsConfigMap,
r.installKnConsoleCLIDownload,
r.installKourier,
r.installDashboard,
r.ensureProxySettings,
}
for _, stage := range stages {
if err := stage(instance); err != nil {
return err
}
}
return nil
}
// configure default settings for OpenShift
func (r *ReconcileKnativeServing) configure(instance *servingv1alpha1.KnativeServing) error {
before := instance.DeepCopy()
if err := common.Mutate(instance, r.client); err != nil {
return err
}
if equality.Semantic.DeepEqual(before.Spec, instance.Spec) {
return nil
}
// Only apply the update if something changed.
log.Info("Updating KnativeServing with mutated state for Openshift")
if err := r.client.Update(context.TODO(), instance); err != nil {
return fmt.Errorf("failed to update KnativeServing with mutated state: %w", err)
}
return nil
}
// ensureProxySettings updates the proxy settings on the KnativeServing controller.
func (r *ReconcileKnativeServing) ensureProxySettings(instance *servingv1alpha1.KnativeServing) error {
proxyEnv := map[string]string{
"HTTP_PROXY": os.Getenv("HTTP_PROXY"),
"HTTPS_PROXY": os.Getenv("HTTPS_PROXY"),
"NO_PROXY": os.Getenv("NO_PROXY"),
}
return common.ApplyEnvironmentToDeployment(instance.Namespace, "controller", proxyEnv, r.client)
}
// set a finalizer to clean up service mesh when instance is deleted
func (r *ReconcileKnativeServing) ensureFinalizers(instance *servingv1alpha1.KnativeServing) error {
for _, finalizer := range instance.GetFinalizers() {
if finalizer == finalizerName {
return nil
}
}
log.Info("Adding finalizer")
instance.SetFinalizers(append(instance.GetFinalizers(), finalizerName))
return r.client.Update(context.TODO(), instance)
}
// create the configmap to be injected with custom certs
func (r *ReconcileKnativeServing) ensureCustomCertsConfigMap(instance *servingv1alpha1.KnativeServing) error {
certs := instance.Spec.ControllerCustomCerts
// If the user doesn't specify anything else, this is set by the webhook/controller defaulter to
// cause us to automatically pull in the relevant ConfigMaps from the cluster. The user needs
// to specifically opt-out of this today by specifying an empty Name and ConfigMap explicitly.
if certs.Type != "ConfigMap" || certs.Name == "" {
return nil
}
serviceCACM, err := r.reconcileConfigMap(instance, certs.Name+"-service-ca", map[string]string{serviceCAKey: "true"}, nil, nil)
if err != nil {
return fmt.Errorf("error reconciling serviceCACM: %w", err)
}
trustedCACM, err := r.reconcileConfigMap(instance, certs.Name+"-trusted-ca", nil, map[string]string{trustedCAKey: "true"}, nil)
if err != nil {
return fmt.Errorf("error reconciling serviceCACM: %w", err)
}
combinedContents := make(map[string]string, len(serviceCACM.Data)+len(trustedCACM.Data))
for key, value := range serviceCACM.Data {
combinedContents[key] = value
}
for key, value := range trustedCACM.Data {
combinedContents[key] = value
}
combinedCM, err := r.reconcileConfigMap(instance, certs.Name, nil, nil, combinedContents)
if err != nil {
return fmt.Errorf("error reconciling custom certs CM: %w", err)
}
// Check if we need to "kick" the controller deployment.
controller := &appsv1.Deployment{}
err = r.client.Get(context.TODO(), client.ObjectKey{Namespace: instance.Namespace, Name: "controller"}, controller)
// If the controller doesn't yet exist, exit early.
if errors.IsNotFound(err) {
return nil
} else if err != nil {
return fmt.Errorf("error fetching controller deployment: %w", err)
}
// If the annotation's version is already the latest version, exit early.
if combinedCM.ResourceVersion == controller.Spec.Template.Annotations[certVersionKey] {
return nil
}
if controller.Spec.Template.Annotations == nil {
controller.Spec.Template.Annotations = make(map[string]string)
}
log.Info("Updating controller cert version",
"old", controller.Spec.Template.Annotations[certVersionKey], "new", combinedCM.ResourceVersion)
controller.Spec.Template.Annotations[certVersionKey] = combinedCM.ResourceVersion
if err := r.client.Update(context.TODO(), controller); err != nil {
return fmt.Errorf("error updating the controller annotation: %w", err)
}
return nil
}
func (r *ReconcileKnativeServing) reconcileConfigMap(instance *servingv1alpha1.KnativeServing, name string,
annotations, labels map[string]string, data map[string]string) (*corev1.ConfigMap, error) {
ctx := context.TODO()
cm := &corev1.ConfigMap{}
err := r.client.Get(ctx, client.ObjectKey{Name: name, Namespace: instance.GetNamespace()}, cm)
if errors.IsNotFound(err) {
cm.Name = name
cm.Namespace = instance.GetNamespace()
cm.Annotations = annotations
cm.Labels = labels
cm.Data = data
if err := controllerutil.SetControllerReference(instance, cm, r.scheme); err != nil {
return nil, fmt.Errorf("failed to set ownerRef on configmap %s: %w", name, err)
}
log.Info("Creating config map", "name", name)
if err = r.client.Create(ctx, cm); err != nil {
return nil, fmt.Errorf("failed to create config map %s: %w", name, err)
}
return cm, nil
} else if err != nil {
return nil, err
} else {
copy := cm.DeepCopy()
changed := false
if !equality.Semantic.DeepEqual(labels, cm.Labels) {
copy.Labels = labels
changed = true
}
if !equality.Semantic.DeepEqual(annotations, cm.Annotations) {
copy.Annotations = annotations
changed = true
}
// We only want to interfere with data if we actually desire new data.
if data != nil && !equality.Semantic.DeepEqual(data, cm.Data) {
copy.Data = data
changed = true
}
// Only update if we've actually seen a change.
if changed {
log.Info("Updating config map", "name", name)
if err = r.client.Update(ctx, copy); err != nil {
return nil, fmt.Errorf("failed to update config map %s: %w", name, err)
}
return copy, nil
}
}
return cm, nil
}
// Install Kourier Ingress Gateway
func (r *ReconcileKnativeServing) installKourier(instance *servingv1alpha1.KnativeServing) error {
// install Kourier
if err := kourier.Apply(instance, r.client, r.scheme); err != nil {
instance.Status.MarkDependencyInstalling("Kourier")
return err
}
instance.Status.MarkDependenciesInstalled()
return nil
}
// installKnConsoleCLIDownload creates CR for kn CLI download link
func (r *ReconcileKnativeServing) installKnConsoleCLIDownload(instance *servingv1alpha1.KnativeServing) error {
return consoleclidownload.Apply(instance, r.client, r.scheme)
}
// installDashboard installs daashboard for OpenShift webconsole
func (r *ReconcileKnativeServing) installDashboard(instance *servingv1alpha1.KnativeServing) error {
return dashboard.Apply(instance, r.client)
}
// general clean-up, mostly resources in different namespaces from servingv1alpha1.KnativeServing.
func (r *ReconcileKnativeServing) delete(instance *servingv1alpha1.KnativeServing) error {
finalizers := sets.NewString(instance.GetFinalizers()...)
if !finalizers.Has(finalizerName) {
log.Info("Finalizer has already been removed, nothing to do")
return nil
}
log.Info("Running cleanup logic")
log.Info("Deleting kourier")
if err := kourier.Delete(instance, r.client, r.scheme); err != nil {
return fmt.Errorf("failed to delete kourier: %w", err)
}
log.Info("Deleting kn ConsoleCLIDownload")
if err := consoleclidownload.Delete(instance, r.client, r.scheme); err != nil {
return fmt.Errorf("failed to delete kn ConsoleCLIDownload: %w", err)
}
log.Info("Deleting dashboard")
if err := dashboard.Delete(instance, r.client); err != nil {
return fmt.Errorf("failed to delete dashboard configmap: %w", err)
}
// The above might take a while, so we refetch the resource again in case it has changed.
refetched := &servingv1alpha1.KnativeServing{}
if err := r.client.Get(context.TODO(), types.NamespacedName{Namespace: instance.Namespace, Name: instance.Name}, refetched); err != nil {
return fmt.Errorf("failed to refetch KnativeServing: %w", err)
}
// Update the refetched finalizer list.
finalizers = sets.NewString(refetched.GetFinalizers()...)
finalizers.Delete(finalizerName)
refetched.SetFinalizers(finalizers.List())
if err := r.client.Update(context.TODO(), refetched); err != nil {
return fmt.Errorf("failed to update KnativeServing with removed finalizer: %w", err)
}
return nil
}