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config_controller.go
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config_controller.go
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/*
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 controllers
import (
"context"
"github.com/davecgh/go-spew/spew"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
metallbv1beta1 "go.universe.tf/metallb/api/v1beta1"
metallbv1beta2 "go.universe.tf/metallb/api/v1beta2"
"go.universe.tf/metallb/internal/config"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
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/handler"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/source"
)
type ConfigReconciler struct {
client.Client
Logger log.Logger
Scheme *runtime.Scheme
Namespace string
Handler func(log.Logger, *config.Config) SyncState
ValidateConfig config.Validate
ForceReload func()
BGPType string
}
func (r *ConfigReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
level.Info(r.Logger).Log("controller", "ConfigReconciler", "start reconcile", req.NamespacedName.String())
defer level.Info(r.Logger).Log("controller", "ConfigReconciler", "end reconcile", req.NamespacedName.String())
updates.Inc()
var addressPools metallbv1beta1.AddressPoolList
if err := r.List(ctx, &addressPools, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "message", "failed to get addresspools", "error", err)
return ctrl.Result{}, err
}
var ipAddressPools metallbv1beta1.IPAddressPoolList
if err := r.List(ctx, &ipAddressPools, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "error", "failed to get ipaddresspools", "error", err)
return ctrl.Result{}, err
}
var bgpPeers metallbv1beta2.BGPPeerList
if err := r.List(ctx, &bgpPeers, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "message", "failed to get bgppeers", "error", err)
return ctrl.Result{}, err
}
var bfdProfiles metallbv1beta1.BFDProfileList
if err := r.List(ctx, &bfdProfiles, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "message", "failed to get bfdprofiles", "error", err)
return ctrl.Result{}, err
}
var l2Advertisements metallbv1beta1.L2AdvertisementList
if err := r.List(ctx, &l2Advertisements, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "message", "failed to get l2 advertisements", "error", err)
return ctrl.Result{}, err
}
var bgpAdvertisements metallbv1beta1.BGPAdvertisementList
if err := r.List(ctx, &bgpAdvertisements, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "message", "failed to get bgp advertisements", "error", err)
return ctrl.Result{}, err
}
var communities metallbv1beta1.CommunityList
if err := r.List(ctx, &communities, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "error", "failed to get communities", "error", err)
return ctrl.Result{}, err
}
secrets, err := r.getSecrets(ctx)
if err != nil {
return ctrl.Result{}, err
}
var nodes corev1.NodeList
if err := r.List(ctx, &nodes); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "message", "failed to get nodes", "error", err)
return ctrl.Result{}, err
}
resources := config.ClusterResources{
Pools: ipAddressPools.Items,
Peers: bgpPeers.Items,
BFDProfiles: bfdProfiles.Items,
L2Advs: l2Advertisements.Items,
BGPAdvs: bgpAdvertisements.Items,
LegacyAddressPools: addressPools.Items,
Communities: communities.Items,
PasswordSecrets: secrets,
Nodes: nodes.Items,
}
level.Debug(r.Logger).Log("controller", "ConfigReconciler", "metallb CRs and Secrets", dumpClusterResources(&resources))
cfg, err := config.For(resources, r.ValidateConfig)
if err != nil {
configStale.Set(1)
level.Error(r.Logger).Log("controller", "ConfigReconciler", "error", "failed to parse the configuration", "error", err)
return ctrl.Result{}, nil
}
level.Debug(r.Logger).Log("controller", "ConfigReconciler", "rendered config", spew.Sdump(cfg))
res := r.Handler(r.Logger, cfg)
switch res {
case SyncStateError:
configStale.Set(1)
updateErrors.Inc()
level.Error(r.Logger).Log("controller", "ConfigReconciler", "metallb CRs and Secrets", dumpClusterResources(&resources), "event", "reload failed, retry")
return ctrl.Result{}, retryError
case SyncStateReprocessAll:
level.Info(r.Logger).Log("controller", "ConfigReconciler", "event", "force service reload")
r.ForceReload()
case SyncStateErrorNoRetry:
configStale.Set(1)
updateErrors.Inc()
level.Error(r.Logger).Log("controller", "ConfigReconciler", "metallb CRs and Secrets", dumpClusterResources(&resources), "event", "reload failed, no retry")
return ctrl.Result{}, nil
}
configLoaded.Set(1)
configStale.Set(0)
level.Info(r.Logger).Log("controller", "ConfigReconciler", "event", "config reloaded")
return ctrl.Result{}, nil
}
func (r *ConfigReconciler) SetupWithManager(mgr ctrl.Manager) error {
p := predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
newNodeObj, ok := e.ObjectNew.(*corev1.Node)
if !ok {
return true
}
oldNodeObj, ok := e.ObjectOld.(*corev1.Node)
if !ok {
return true
}
// If there is no changes in node labels, ignore event.
if labels.Equals(labels.Set(oldNodeObj.Labels), labels.Set(newNodeObj.Labels)) {
return false
}
return true
},
}
return ctrl.NewControllerManagedBy(mgr).
For(&metallbv1beta2.BGPPeer{}).
Watches(&source.Kind{Type: &metallbv1beta1.IPAddressPool{}}, &handler.EnqueueRequestForObject{}).
Watches(&source.Kind{Type: &corev1.Node{}}, &handler.EnqueueRequestForObject{}).
Watches(&source.Kind{Type: &metallbv1beta1.BGPAdvertisement{}}, &handler.EnqueueRequestForObject{}).
Watches(&source.Kind{Type: &metallbv1beta1.L2Advertisement{}}, &handler.EnqueueRequestForObject{}).
Watches(&source.Kind{Type: &metallbv1beta1.BFDProfile{}}, &handler.EnqueueRequestForObject{}).
Watches(&source.Kind{Type: &metallbv1beta1.AddressPool{}}, &handler.EnqueueRequestForObject{}).
Watches(&source.Kind{Type: &metallbv1beta1.Community{}}, &handler.EnqueueRequestForObject{}).
Watches(&source.Kind{Type: &corev1.Secret{}}, &handler.EnqueueRequestForObject{}).
WithEventFilter(p).
Complete(r)
}
func (r *ConfigReconciler) getSecrets(ctx context.Context) (map[string]corev1.Secret, error) {
var secrets corev1.SecretList
if err := r.List(ctx, &secrets, client.InNamespace(r.Namespace)); err != nil {
level.Error(r.Logger).Log("controller", "ConfigReconciler", "error", "failed to get secrets", "error", err)
return nil, err
}
secretsMap := make(map[string]corev1.Secret)
for _, secret := range secrets.Items {
secretsMap[secret.Name] = secret
}
return secretsMap, nil
}