Merge pull request #6151 from kaovilai/expose-getpluginconfig

Make GetPluginConfig accessible from other packages.

pkg/plugin/framework/common/plugin_config.go

@@ -0,0 +1,58 @@
+/*
+Copyright the Velero contributors.
+
+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 common
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/pkg/errors"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
+)
+
+func PluginConfigLabelSelector(kind PluginKind, name string) string {
+	return fmt.Sprintf("velero.io/plugin-config=true,%s=%s", name, kind)
+}
+
+func GetPluginConfig(kind PluginKind, name string, client corev1client.ConfigMapInterface) (*corev1.ConfigMap, error) {
+	opts := metav1.ListOptions{
+		// velero.io/plugin-config: true
+		// velero.io/pod-volume-restore: RestoreItemAction
+		LabelSelector: PluginConfigLabelSelector(kind, name),
+	}
+
+	list, err := client.List(context.Background(), opts)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	if len(list.Items) == 0 {
+		return nil, nil
+	}
+
+	if len(list.Items) > 1 {
+		var items []string
+		for _, item := range list.Items {
+			items = append(items, item.Name)
+		}
+		return nil, errors.Errorf("found more than one ConfigMap matching label selector %q: %v", opts.LabelSelector, items)
+	}
+
+	return &list.Items[0], nil
+}

pkg/plugin/framework/common/plugin_config_test.go

@@ -0,0 +1,122 @@
+/*
+Copyright the Velero contributors.
+
+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 common
+
+import (
+	"reflect"
+	"testing"
+
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes/fake"
+
+	velerov1 "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
+)
+
+func TestGetPluginConfig(t *testing.T) {
+	type args struct {
+		kind    PluginKind
+		name    string
+		objects []runtime.Object
+	}
+	pluginLabelsSet, _ := labels.ConvertSelectorToLabelsMap(PluginConfigLabelSelector(PluginKindRestoreItemAction, "foo"))
+	testConfigMap := &corev1.ConfigMap{
+		TypeMeta: metav1.TypeMeta{
+			Kind: "ConfigMap",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "foo-config",
+			Namespace: velerov1.DefaultNamespace,
+			Labels:    pluginLabelsSet,
+		},
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    *corev1.ConfigMap
+		wantErr bool
+	}{
+		{
+			name: "should return nil if no config map found",
+			args: args{
+				kind:    PluginKindRestoreItemAction,
+				name:    "foo",
+				objects: []runtime.Object{},
+			},
+			want:    nil,
+			wantErr: false,
+		},
+		{
+			name: "should return error if more than one config map found",
+			args: args{
+				kind: PluginKindRestoreItemAction,
+				name: "foo",
+				objects: []runtime.Object{
+					&corev1.ConfigMap{
+						TypeMeta: metav1.TypeMeta{
+							Kind: "ConfigMap",
+						},
+						ObjectMeta: metav1.ObjectMeta{
+							Name:      "foo-config",
+							Namespace: velerov1.DefaultNamespace,
+							Labels:    pluginLabelsSet,
+						},
+					},
+					&corev1.ConfigMap{
+						TypeMeta: metav1.TypeMeta{
+							Kind: "ConfigMap",
+						},
+						ObjectMeta: metav1.ObjectMeta{
+							Name:      "foo-config-duplicate",
+							Namespace: velerov1.DefaultNamespace,
+							Labels:    pluginLabelsSet,
+						},
+					},
+				},
+			},
+			want:    nil,
+			wantErr: true,
+		},
+		{
+			name: "should return pointer to configmap if only one config map with label found",
+			args: args{
+				kind: PluginKindRestoreItemAction,
+				name: "foo",
+				objects: []runtime.Object{
+					testConfigMap,
+				},
+			},
+			want:    testConfigMap,
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			fakeClient := fake.NewSimpleClientset(tt.args.objects...)
+			got, err := GetPluginConfig(tt.args.kind, tt.args.name, fakeClient.CoreV1().ConfigMaps(velerov1.DefaultNamespace))
+			if (err != nil) != tt.wantErr {
+				t.Errorf("GetPluginConfig() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("GetPluginConfig() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}