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| 1 | +/* |
| 2 | +Copyright 2022 The Kubernetes Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package helmreleasedrift |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + "fmt" |
| 22 | + "strings" |
| 23 | + "sync" |
| 24 | + |
| 25 | + "github.com/ironcore-dev/controller-utils/unstructuredutils" |
| 26 | + "golang.org/x/exp/slices" |
| 27 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 28 | + "k8s.io/apimachinery/pkg/labels" |
| 29 | + "k8s.io/apimachinery/pkg/runtime/schema" |
| 30 | + "k8s.io/client-go/kubernetes/scheme" |
| 31 | + "k8s.io/client-go/rest" |
| 32 | + addonsv1alpha1 "sigs.k8s.io/cluster-api-addon-provider-helm/api/v1alpha1" |
| 33 | + ctrl "sigs.k8s.io/controller-runtime" |
| 34 | + "sigs.k8s.io/controller-runtime/pkg/cache" |
| 35 | + "sigs.k8s.io/controller-runtime/pkg/client" |
| 36 | + "sigs.k8s.io/controller-runtime/pkg/event" |
| 37 | + metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server" |
| 38 | + "sigs.k8s.io/kustomize/api/konfig" |
| 39 | +) |
| 40 | + |
| 41 | +const ( |
| 42 | + InstanceLabelKey = "app.kubernetes.io/instance" |
| 43 | +) |
| 44 | + |
| 45 | +var ( |
| 46 | + managers = map[string]options{} |
| 47 | + mutex sync.Mutex |
| 48 | +) |
| 49 | + |
| 50 | +type options struct { |
| 51 | + gvks []schema.GroupVersionKind |
| 52 | + cancel context.CancelFunc |
| 53 | +} |
| 54 | + |
| 55 | +func Add(ctx context.Context, restConfig *rest.Config, helmReleaseProxy *addonsv1alpha1.HelmReleaseProxy, releaseManifest string, eventChannel chan event.GenericEvent) error { |
| 56 | + log := ctrl.LoggerFrom(ctx) |
| 57 | + gvks, err := extractGVKsFromManifest(releaseManifest) |
| 58 | + if err != nil { |
| 59 | + return err |
| 60 | + } |
| 61 | + |
| 62 | + manager, exist := managers[managerKey(helmReleaseProxy)] |
| 63 | + if exist { |
| 64 | + if slices.Equal(manager.gvks, gvks) { |
| 65 | + return nil |
| 66 | + } |
| 67 | + Remove(helmReleaseProxy) |
| 68 | + } |
| 69 | + |
| 70 | + mutex.Lock() |
| 71 | + defer mutex.Unlock() |
| 72 | + k8sManager, err := ctrl.NewManager(restConfig, ctrl.Options{ |
| 73 | + Scheme: scheme.Scheme, |
| 74 | + Metrics: metricsserver.Options{ |
| 75 | + BindAddress: "0", |
| 76 | + }, |
| 77 | + HealthProbeBindAddress: "0", |
| 78 | + Cache: cache.Options{ |
| 79 | + DefaultLabelSelector: labels.SelectorFromSet(map[string]string{ |
| 80 | + konfig.ManagedbyLabelKey: "Helm", |
| 81 | + InstanceLabelKey: helmReleaseProxy.Spec.ReleaseName, |
| 82 | + }), |
| 83 | + }, |
| 84 | + }) |
| 85 | + if err != nil { |
| 86 | + return err |
| 87 | + } |
| 88 | + if err = (&releaseDriftReconciler{ |
| 89 | + Client: k8sManager.GetClient(), |
| 90 | + Scheme: k8sManager.GetScheme(), |
| 91 | + HelmReleaseProxyKey: client.ObjectKeyFromObject(helmReleaseProxy), |
| 92 | + HelmReleaseProxyEvent: eventChannel, |
| 93 | + }).setupWithManager(k8sManager, gvks); err != nil { |
| 94 | + return err |
| 95 | + } |
| 96 | + log.V(2).Info("Starting release drift controller manager") |
| 97 | + ctx, cancel := context.WithCancel(ctx) |
| 98 | + go func() { |
| 99 | + if err = k8sManager.Start(ctx); err != nil { |
| 100 | + log.V(2).Error(err, "failed to start release drift manager") |
| 101 | + objectMeta := metav1.ObjectMeta{ |
| 102 | + Name: helmReleaseProxy.Name, |
| 103 | + Namespace: helmReleaseProxy.Namespace, |
| 104 | + } |
| 105 | + eventChannel <- event.GenericEvent{Object: &addonsv1alpha1.HelmReleaseProxy{ObjectMeta: objectMeta}} |
| 106 | + } |
| 107 | + }() |
| 108 | + |
| 109 | + managers[managerKey(helmReleaseProxy)] = options{ |
| 110 | + gvks: gvks, |
| 111 | + cancel: cancel, |
| 112 | + } |
| 113 | + |
| 114 | + return nil |
| 115 | +} |
| 116 | + |
| 117 | +func Remove(helmReleaseProxy *addonsv1alpha1.HelmReleaseProxy) { |
| 118 | + mutex.Lock() |
| 119 | + defer mutex.Unlock() |
| 120 | + |
| 121 | + manager, exist := managers[managerKey(helmReleaseProxy)] |
| 122 | + if exist { |
| 123 | + manager.cancel() |
| 124 | + delete(managers, managerKey(helmReleaseProxy)) |
| 125 | + } |
| 126 | +} |
| 127 | + |
| 128 | +func managerKey(helmReleaseProxy *addonsv1alpha1.HelmReleaseProxy) string { |
| 129 | + return fmt.Sprintf("%s-%s-%s", helmReleaseProxy.Spec.ClusterRef.Name, helmReleaseProxy.Namespace, helmReleaseProxy.Spec.ReleaseName) |
| 130 | +} |
| 131 | + |
| 132 | +func extractGVKsFromManifest(manifest string) ([]schema.GroupVersionKind, error) { |
| 133 | + objects, err := unstructuredutils.Read(strings.NewReader(manifest)) |
| 134 | + if err != nil { |
| 135 | + return nil, err |
| 136 | + } |
| 137 | + var gvks []schema.GroupVersionKind |
| 138 | + for _, obj := range objects { |
| 139 | + if !slices.Contains(gvks, obj.GroupVersionKind()) { |
| 140 | + gvks = append(gvks, obj.GroupVersionKind()) |
| 141 | + } |
| 142 | + } |
| 143 | + |
| 144 | + return gvks, nil |
| 145 | +} |
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