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package network
import (
"context"
"fmt"
k8sv1alpha1 "ovn4nfv-k8s-plugin/pkg/apis/k8s/v1alpha1"
// corev1 "k8s.io/api/core/v1"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"ovn4nfv-k8s-plugin/internal/pkg/ovn"
"ovn4nfv-k8s-plugin/pkg/utils"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var log = logf.Log.WithName("network_controller")
// Add creates a new Network 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 &ReconcileNetwork{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("network-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource Network
err = c.Watch(&source.Kind{Type: &k8sv1alpha1.Network{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileNetwork implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileNetwork{}
// ReconcileNetwork reconciles a Network object
type ReconcileNetwork 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
}
type reconcileFun func(instance *k8sv1alpha1.Network, reqLogger logr.Logger) error
// Reconcile reads that state of the cluster for a Network object and makes changes based on the state read
// and what is in the Network.Spec
// The Controller will requeue the Request to be processed again if the returned error is non-nil or
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
func (r *ReconcileNetwork) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.V(1).Info("Reconciling Network")
// Fetch the Network instance
instance := &k8sv1alpha1.Network{}
err := r.client.Get(context.TODO(), request.NamespacedName, instance)
if err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
reqLogger.V(1).Info("Network Object not found")
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
for _, fun := range []reconcileFun{
r.reconcileFinalizers,
r.createNetwork,
} {
if err = fun(instance, reqLogger); err != nil {
return reconcile.Result{}, err
}
}
return reconcile.Result{}, nil
}
const (
nfnNetworkFinalizer = "nfnCleanUpNetwork"
)
func (r *ReconcileNetwork) createNetwork(cr *k8sv1alpha1.Network, reqLogger logr.Logger) error {
if !cr.DeletionTimestamp.IsZero() {
// Marked for deletion
return nil
}
switch {
case cr.Spec.CniType == "ovn4nfv":
ovnCtl, err := ovn.GetOvnController()
if err != nil {
return err
}
err = ovnCtl.CreateNetwork(cr)
if err != nil {
// Log the error
reqLogger.Error(err, "Error Creating Network")
cr.Status.State = k8sv1alpha1.CreateInternalError
} else {
cr.Status.State = k8sv1alpha1.Created
}
err = r.client.Status().Update(context.TODO(), cr)
if err != nil {
return err
}
// If OVN internal error don't requeue
return nil
// Add other CNI types here
}
reqLogger.Info("CNI type not supported", "name", cr.Spec.CniType)
return fmt.Errorf("CNI type not supported")
}
func (r *ReconcileNetwork) deleteNetwork(cr *k8sv1alpha1.Network, reqLogger logr.Logger) error {
switch {
case cr.Spec.CniType == "ovn4nfv":
ovnCtl, err := ovn.GetOvnController()
if err != nil {
return err
}
err = ovnCtl.DeleteNetwork(cr)
if err != nil {
// Log the error
reqLogger.Error(err, "Error Delete Network")
cr.Status.State = k8sv1alpha1.DeleteInternalError
err = r.client.Status().Update(context.TODO(), cr)
if err != nil {
return err
}
}
// If OVN internal error don't requeue
return nil
// Add other CNI types here
}
reqLogger.Info("CNI type not supported", "name", cr.Spec.CniType)
return fmt.Errorf("CNI type not supported")
}
func (r *ReconcileNetwork) reconcileFinalizers(instance *k8sv1alpha1.Network, reqLogger logr.Logger) (err error) {
if !instance.DeletionTimestamp.IsZero() {
// Instance marked for deletion
if utils.Contains(instance.ObjectMeta.Finalizers, nfnNetworkFinalizer) {
reqLogger.V(1).Info("Finalizer found - delete network")
if err = r.deleteNetwork(instance, reqLogger); err != nil {
reqLogger.Error(err, "Delete network")
}
// Remove the finalizer even if Delete Network fails. Fatal error retry will not resolve
instance.ObjectMeta.Finalizers = utils.Remove(instance.ObjectMeta.Finalizers, nfnNetworkFinalizer)
if err = r.client.Update(context.TODO(), instance); err != nil {
reqLogger.Error(err, "Removing Finalize")
return err
}
}
} else {
// If finalizer doesn't exist add it
if !utils.Contains(instance.GetFinalizers(), nfnNetworkFinalizer) {
instance.SetFinalizers(append(instance.GetFinalizers(), nfnNetworkFinalizer))
if err = r.client.Update(context.TODO(), instance); err != nil {
reqLogger.Error(err, "Adding Finalize")
return err
}
reqLogger.V(1).Info("Finalizer added")
}
}
return nil
}
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