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95 changes: 95 additions & 0 deletions
95
pkg/liqo-controller-manager/external-network/wireguard/utils.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| // Copyright 2019-2023 The Liqo 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 wireguard | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
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| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| utilruntime "k8s.io/apimachinery/pkg/util/runtime" | ||
| "k8s.io/klog/v2" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/predicate" | ||
|
|
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| "github.com/liqotech/liqo/pkg/consts" | ||
| liqolabels "github.com/liqotech/liqo/pkg/utils/labels" | ||
| ) | ||
|
|
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| func filterWireGuardSecretsPredicate() predicate.Predicate { | ||
| filterGatewayResources, err := predicate.LabelSelectorPredicate(liqolabels.GatewayResourceLabelSelector) | ||
| utilruntime.Must(err) | ||
|
|
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| filterResourcesForRemote, err := predicate.LabelSelectorPredicate(liqolabels.ResourceForRemoteClusterLabelSelector) | ||
| utilruntime.Must(err) | ||
|
|
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| return predicate.And(filterGatewayResources, filterResourcesForRemote) | ||
| } | ||
|
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| func wireGuardSecretEnquerer(_ context.Context, obj client.Object) []ctrl.Request { | ||
| secret, ok := obj.(*corev1.Secret) | ||
| if !ok { | ||
| return nil | ||
| } | ||
|
|
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| return []ctrl.Request{ | ||
| { | ||
| NamespacedName: types.NamespacedName{ | ||
| Namespace: secret.Namespace, | ||
| Name: mapSecretToWireGuardResource(secret.Name), | ||
| }, | ||
| }, | ||
| } | ||
| } | ||
|
|
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| // TODO:: use generic map function after merge. | ||
| func mapSecretToWireGuardResource(secretName string) string { | ||
| return secretName | ||
| } | ||
|
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| func getWireGuardSecret(ctx context.Context, cl client.Client, wgObj metav1.Object) (*corev1.Secret, error) { | ||
| wgObjNsName := types.NamespacedName{Name: wgObj.GetName(), Namespace: wgObj.GetNamespace()} | ||
|
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| remoteClusterID, exists := wgObj.GetLabels()[consts.RemoteClusterID] | ||
| if !exists { | ||
| err := fmt.Errorf("missing %q label in WireGuard gateway %q", consts.RemoteClusterID, wgObjNsName) | ||
| klog.Error(err) | ||
| return nil, err | ||
| } | ||
| wgSecretSelector := client.MatchingLabels{ | ||
| consts.GatewayResourceLabel: consts.GatewayResourceLabelValue, | ||
| consts.RemoteClusterID: remoteClusterID, | ||
| } | ||
|
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| var secrets corev1.SecretList | ||
| err := cl.List(ctx, &secrets, client.InNamespace(wgObj.GetNamespace()), wgSecretSelector) | ||
| if err != nil { | ||
| klog.Errorf("Unable to list secrets associated to WireGuard gateway %q: %v", wgObjNsName, err) | ||
| return nil, err | ||
| } | ||
|
|
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| switch len(secrets.Items) { | ||
| case 0: | ||
| klog.Warningf("Secret associated to WireGuard gateway %q not found", wgObjNsName) | ||
| return nil, nil | ||
| case 1: | ||
| return &secrets.Items[0], nil | ||
| default: | ||
| return nil, fmt.Errorf("found multiple secrets associated to WireGuard gateway %q", wgObjNsName) | ||
| } | ||
| } |
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