/
calicobgp_controller.go
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/
calicobgp_controller.go
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/*
Copyright 2024.
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 calico
import (
"context"
"fmt"
v3 "github.com/projectcalico/api/pkg/apis/projectcalico/v3"
"github.com/projectcalico/api/pkg/lib/numorstring"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
bgpv1alpha1 "github.com/sapcc/cni-nanny/api/bgp/v1alpha1"
topologyv1alpha1 "github.com/sapcc/cni-nanny/api/topology/v1alpha1"
"github.com/sapcc/cni-nanny/internal/config"
)
// CalicoBgpReconciler reconciles a BgpPeerDiscovery object
type CalicoBgpReconciler struct {
client.Client
Scheme *runtime.Scheme
DefaultName string
Namespace string
NodeTopologyLabel string
BgpRemoteAs int
}
//+kubebuilder:rbac:groups=bgp.cninanny.sap.cc,resources=bgppeerdiscoveries,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=bgp.cninanny.sap.cc,resources=bgppeerdiscoveries/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=bgp.cninanny.sap.cc,resources=bgppeerdiscoveries/finalizers,verbs=update
//+kubebuilder:rbac:groups=topology.cninanny.sap.cc,resources=labeldiscoveries,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=topology.cninanny.sap.cc,resources=labeldiscoveries/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=topology.cninanny.sap.cc,resources=labeldiscoveries/finalizers,verbs=update
//+kubebuilder:rbac:groups=projectcalico.org,resources=bgppeers,verbs=get;list;watch;create;update;patch
// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
// TODO(user): Modify the Reconcile function to compare the state specified by
// the BgpPeerDiscovery object against the actual cluster state, and then
// perform operations to make the cluster state reflect the state specified by
// the user.
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.16.3/pkg/reconcile
func (r *CalicoBgpReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
_ = log.FromContext(ctx)
var bgpPeerDiscovery = new(bgpv1alpha1.BgpPeerDiscovery)
var nsName types.NamespacedName
err := r.Get(ctx, req.NamespacedName, bgpPeerDiscovery)
if err != nil {
log.FromContext(ctx).Error(err, "error getting bgpPeerDiscovery")
return ctrl.Result{}, err
}
if len(bgpPeerDiscovery.Status.DiscoveredPeers) > 0 {
for _, v := range bgpPeerDiscovery.Status.DiscoveredPeers {
var calicoBgpPeer v3.BGPPeer
nsName.Name = "bgp-peer-" + req.Name + "-" + v
nsName.Namespace = config.Cfg.Namespace
spec := v3.BGPPeerSpec{
PeerIP: v,
ASNumber: numorstring.ASNumber(config.Cfg.BgpRemoteAs),
NodeSelector: config.Cfg.NodeTopologyLabel + " == " + fmt.Sprintf("%q", req.Name),
}
err := r.Get(ctx, nsName, &calicoBgpPeer)
if err != nil {
if errors.IsNotFound(err) {
calicoPeer := generateCalicoBgpPeer(nsName, spec, &calicoBgpPeer)
log.FromContext(ctx).Info("creating calico peer", calicoPeer.Name, calicoPeer.Spec.PeerIP)
err = r.Create(ctx, calicoPeer)
if err != nil {
log.FromContext(ctx).Error(err, "error creating calicoBgpPeer")
return ctrl.Result{}, err
}
} else {
log.FromContext(ctx).Error(err, "error getting calicoBgpPeer")
return ctrl.Result{}, err
}
}
}
/*
err = controllerutil.SetOwnerReference(bgpPeerDiscovery, &calicoBgpPeer, r.Scheme)
if err != nil {
log.FromContext(ctx).Error(err, "error setting owner reference")
}
*/
labelDiscovery := &topologyv1alpha1.LabelDiscovery{}
nsName.Name = config.Cfg.DefaultName
nsName.Namespace = config.Cfg.Namespace
err := r.Get(ctx, nsName, labelDiscovery)
if err != nil {
log.FromContext(ctx).Error(err, "could not get client from manager")
return reconcile.Result{}, err
}
patch := client.MergeFrom(labelDiscovery.DeepCopy())
ls := labelDiscovery.Status.DiscoveredTopologyValues
for k, v := range labelDiscovery.Status.DiscoveredTopologyValues {
ls[k] = v
if k == req.Name && !v.Finalized {
v.Finalized = true
ls[k] = v
}
}
labelDiscovery.Status.DiscoveredTopologyValues = ls
err = r.Status().Patch(ctx, labelDiscovery, patch)
if err != nil {
log.FromContext(ctx).Error(err, "could not patch labelDiscovery")
}
}
return ctrl.Result{}, nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *CalicoBgpReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
Named("calico bgp controller").
For(&bgpv1alpha1.BgpPeerDiscovery{}).
Complete(r)
}
func generateCalicoBgpPeer(nsName types.NamespacedName, spec v3.BGPPeerSpec, calicoBgpPeer *v3.BGPPeer) *v3.BGPPeer {
calicoBgpPeer.Name = nsName.Name
calicoBgpPeer.Namespace = nsName.Namespace
calicoBgpPeer.Spec = spec
calicoBgpPeer.ObjectMeta.Labels = map[string]string{}
calicoBgpPeer.ObjectMeta.Labels[config.KubeLabelComponent] = "BgpPeer"
calicoBgpPeer.ObjectMeta.Labels[config.KubeLabelManaged] = config.KubeApp
return calicoBgpPeer
}