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package pod
import (
"context"
"encoding/json"
"fmt"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"ovn4nfv-k8s-plugin/internal/pkg/ovn"
"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"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"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("controller_pod")
const (
nfnNetworkAnnotation = "k8s.plugin.opnfv.org/nfn-network"
)
type nfnNetwork struct {
Type string "json:\"type\""
Interface []map[string]interface{} "json:\"interface\""
}
// Add creates a new Pod 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 &ReconcilePod{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 that will call the provided Reconciler function in response
// to events.
c, err := controller.New("pod-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Define Predicates On Create and Update function
p := predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
annotaion := e.MetaNew.GetAnnotations()
// The object doesn't contain annotation ,nfnNetworkAnnotation so the event will be
// ignored.
if _, ok := annotaion[nfnNetworkAnnotation]; !ok {
return false
}
// If pod is already processed by OVN don't add event
if _, ok := annotaion[ovn.Ovn4nfvAnnotationTag]; ok {
return false
}
return true
},
CreateFunc: func(e event.CreateEvent) bool {
// The object doesn't contain annotation ,nfnNetworkAnnotation so the event will be
// ignored.
annotaion := e.Meta.GetAnnotations()
if _, ok := annotaion[nfnNetworkAnnotation]; !ok {
return false
}
return true
},
DeleteFunc: func(e event.DeleteEvent) bool {
// The object doesn't contain annotation ,nfnNetworkAnnotation so the event will be
// ignored.
annotaion := e.Meta.GetAnnotations()
if _, ok := annotaion[nfnNetworkAnnotation]; !ok {
return false
}
return true
},
}
// Watch for Pod create / update / delete events and call Reconcile
err = c.Watch(&source.Kind{Type: &corev1.Pod{}}, &handler.EnqueueRequestForObject{}, p)
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcuilePod implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcilePod{}
// ReconcilePod reconciles a ProviderNetwork object
type ReconcilePod 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 function
// 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 *ReconcilePod) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Enter Reconciling Pod")
// Fetch the Pod instance
instance := &corev1.Pod{}
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
if instance.Name == "" || instance.Namespace == "" {
return reconcile.Result{}, nil
}
r.deleteLogicalPorts(request.Name, request.Namespace)
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
if instance.Name == "" || instance.Namespace == "" {
return reconcile.Result{}, nil
}
err = r.addLogicalPorts(instance)
if err != nil && err.Error() == "Failed to add ports" {
// Requeue the object
return reconcile.Result{}, err
}
reqLogger.Info("Exit Reconciling Pod")
return reconcile.Result{}, nil
}
// annotatePod annotates pod with the given annotations
func (r *ReconcilePod) setPodAnnotation(pod *corev1.Pod, key, value string) error {
patchData := fmt.Sprintf(`{"metadata":{"annotations":{"%s":"%s"}}}`, key, value)
err := r.client.Patch(context.TODO(), pod, client.ConstantPatch(types.MergePatchType, []byte(patchData)))
if err != nil {
log.Error(err, "Updating pod failed", "pod", pod, "key", key, "value", value)
return err
}
return nil
}
func (r *ReconcilePod) addLogicalPorts(pod *corev1.Pod) error {
nfn, err := r.readPodAnnotation(pod)
if err != nil {
return err
}
switch {
case nfn.Type == "ovn4nfv":
ovnCtl, err := ovn.GetOvnController()
if err != nil {
return err
}
if _, ok := pod.Annotations[ovn.Ovn4nfvAnnotationTag]; ok {
return fmt.Errorf("Pod annotation found")
}
key, value := ovnCtl.AddLogicalPorts(pod, nfn.Interface)
if len(key) > 0 {
return r.setPodAnnotation(pod, key, value)
}
return fmt.Errorf("Failed to add ports")
default:
return fmt.Errorf("Unsupported Networking type %s", nfn.Type)
// Add other types here
}
}
func (r *ReconcilePod) deleteLogicalPorts(name, namesapce string) error {
// Run delete for all controllers; pod annonations inaccessible
ovnCtl, err := ovn.GetOvnController()
if err != nil {
return err
}
ovnCtl.DeleteLogicalPorts(name, namesapce)
return nil
// Add other types here
}
func (r *ReconcilePod) readPodAnnotation(pod *corev1.Pod) (*nfnNetwork, error) {
annotaion, ok := pod.Annotations[nfnNetworkAnnotation]
if !ok {
return nil, fmt.Errorf("Invalid annotations")
}
var nfn nfnNetwork
err := json.Unmarshal([]byte(annotaion), &nfn)
if err != nil {
log.Error(err, "Invalid nfn annotaion", "annotaiton", annotaion)
return nil, err
}
return &nfn, nil
}
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