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reconciler.go
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/
reconciler.go
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/*
Copyright 2023 The Nephio Authors.
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 nodenodepoolcontroller
import (
"context"
"fmt"
"reflect"
"strings"
"time"
"github.com/henderiw-nephio/wire-connector/controllers/ctrlconfig"
wirenode "github.com/henderiw-nephio/wire-connector/pkg/wirer/cache/node"
reconcilerinterface "github.com/nephio-project/nephio/controllers/pkg/reconcilers/reconciler-interface"
"github.com/nephio-project/nephio/controllers/pkg/resource"
invv1alpha1 "github.com/nokia/k8s-ipam/apis/inv/v1alpha1"
"github.com/nokia/k8s-ipam/pkg/meta"
"github.com/nokia/k8s-ipam/pkg/resources"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
func init() {
reconcilerinterface.Register("nodenodepoolcontroller", &reconciler{})
}
const (
finalizer = "nodenodepool.wirer.nephio.org/finalizer"
// error
errGetCr = "cannot get resource"
errUpdateStatus = "cannot update status"
)
// New Reconciler -> used for intercluster controller
func New(ctx context.Context, cfg *ctrlconfig.Config) reconcile.Reconciler {
c := resource.NewAPIPatchingApplicator(cfg.Client)
return &reconciler{
APIPatchingApplicator: c,
finalizer: resource.NewAPIFinalizer(cfg.Client, finalizer),
clusterName: cfg.ClusterName,
}
}
// SetupWithManager sets up the controller with the Manager.
func (r *reconciler) SetupWithManager(ctx context.Context, mgr ctrl.Manager, c interface{}) (map[schema.GroupVersionKind]chan event.GenericEvent, error) {
cfg, ok := c.(*ctrlconfig.Config)
if !ok {
return nil, fmt.Errorf("cannot initialize, expecting controllerConfig, got: %s", reflect.TypeOf(c).Name())
}
// initialize reconciler
r.APIPatchingApplicator = resource.NewAPIPatchingApplicator(mgr.GetClient())
r.finalizer = resource.NewAPIFinalizer(mgr.GetClient(), finalizer)
r.clusterName = cfg.ClusterName
return nil,
ctrl.NewControllerManagedBy(mgr).
Named("NodeNodePoolController").
For(&corev1.Node{}).
Owns(&invv1alpha1.Node{}).
Watches(&invv1alpha1.NodePool{}, &nodePoolEventHandler{client: mgr.GetClient()}).
Complete(r)
}
// reconciler reconciles a KRM resource
type reconciler struct {
resource.APIPatchingApplicator
finalizer *resource.APIFinalizer
clusterName string
}
func (r *reconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
log := log.FromContext(ctx).WithValues("cluster", r.clusterName)
log.Info("reconcile node")
res := resources.New(r.APIPatchingApplicator, resources.Config{
OwnerRef: false,
Owns: []schema.GroupVersionKind{
invv1alpha1.NodeGroupVersionKind,
},
})
cr := &corev1.Node{}
if err := r.Get(ctx, req.NamespacedName, cr); err != nil {
// There's no need to requeue if we no longer exist. Otherwise we'll be
// requeued implicitly because we return an error.
if resource.IgnoreNotFound(err) != nil {
log.Error(err, errGetCr)
return ctrl.Result{}, errors.Wrap(resource.IgnoreNotFound(err), errGetCr)
}
return reconcile.Result{}, nil
}
res.Init(client.MatchingLabels{})
if meta.WasDeleted(cr) {
// TODO delete resources
if err := res.APIDelete(ctx, cr); err != nil {
log.Error(err, "cannot remove resources")
return reconcile.Result{Requeue: true}, err
}
if err := r.finalizer.RemoveFinalizer(ctx, cr); err != nil {
log.Error(err, "cannot remove finalizer")
return reconcile.Result{Requeue: true}, err
}
return ctrl.Result{}, nil
}
found := false
for labelKey, labelValue := range cr.GetLabels() {
if strings.Contains(labelKey, "nodepool") {
if err := r.finalizer.AddFinalizer(ctx, cr); err != nil {
log.Error(err, "cannot add finalizer")
return reconcile.Result{Requeue: true}, err
}
np := &invv1alpha1.NodePool{}
if err := r.Get(ctx, types.NamespacedName{Namespace: "default", Name: labelValue}, np); err != nil {
if resource.IgnoreNotFound(err) != nil {
return ctrl.Result{}, err
}
// not found
// not found -> wait till nodepool is found
// delete resources
if err := res.APIDelete(ctx, cr); err != nil {
return ctrl.Result{}, err
}
// we could optimize this and fetch the nodepool from the cache
return ctrl.Result{RequeueAfter: 2 * time.Second}, nil
}
if meta.WasDeleted(np) {
log.Info("nodepool delete timestamp")
// not found -> wait till nodepool is found
// delete resources
if err := res.APIDelete(ctx, cr); err != nil {
return ctrl.Result{}, err
}
}
res.Init(client.MatchingLabels{})
for _, addr := range cr.Status.Addresses {
// there is only 1 internal ip
if addr.Type == corev1.NodeInternalIP {
if err := res.AddNewResource(cr, invv1alpha1.BuildNode(
metav1.ObjectMeta{
Name: cr.Name,
Namespace: r.clusterName,
},
invv1alpha1.NodeSpec{
Provider: np.Spec.Provider,
Address: &addr.Address,
Location: np.Spec.Location,
NodeConfig: np.Spec.NodeConfig,
UserDefinedLabels: np.Spec.UserDefinedLabels,
},
invv1alpha1.NodeStatus{},
).DeepCopy()); err != nil {
return ctrl.Result{}, err
}
found = true
break
}
}
}
}
log.Info("nodepool", "found", found)
if found {
if err := res.APIApply(ctx, cr); err != nil {
return ctrl.Result{}, err
}
} else {
if err := res.APIDelete(ctx, cr); err != nil {
return ctrl.Result{}, err
}
}
return ctrl.Result{}, nil
}
// getNode retrieves specific data from the CR.
func (r *reconciler) getNode(n *corev1.Node) wirenode.Node {
node := wirenode.Node{}
for _, addr := range n.Status.Addresses {
if addr.Type == corev1.NodeInternalIP {
node.IsReady = true
node.HostIP = addr.Address
}
}
return node
}