Add basic authz config integration test

test/integration/auth/authz_config_test.go

@@ -0,0 +1,95 @@
+/*
+Copyright 2023 The Kubernetes 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 auth
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	authorizationv1 "k8s.io/api/authorization/v1"
+	rbacv1 "k8s.io/api/rbac/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apiserver/pkg/features"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	clientset "k8s.io/client-go/kubernetes"
+	featuregatetesting "k8s.io/component-base/featuregate/testing"
+	kubeapiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
+	"k8s.io/kubernetes/test/integration/authutil"
+	"k8s.io/kubernetes/test/integration/framework"
+)
+
+func TestAuthzConfig(t *testing.T) {
+	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.StructuredAuthorizationConfiguration, true)()
+
+	dir := t.TempDir()
+	configFileName := filepath.Join(dir, "config.yaml")
+	if err := os.WriteFile(configFileName, []byte(`
+apiVersion: apiserver.config.k8s.io/v1alpha1
+kind: AuthorizationConfiguration
+authorizers:
+- type: RBAC
+  name: rbac
+`), os.FileMode(0644)); err != nil {
+		t.Fatal(err)
+	}
+
+	server := kubeapiservertesting.StartTestServerOrDie(
+		t,
+		nil,
+		[]string{"--authorization-config=" + configFileName},
+		framework.SharedEtcd(),
+	)
+	t.Cleanup(server.TearDownFn)
+
+	adminClient := clientset.NewForConfigOrDie(server.ClientConfig)
+
+	sar := &authorizationv1.SubjectAccessReview{Spec: authorizationv1.SubjectAccessReviewSpec{
+		User: "alice",
+		ResourceAttributes: &authorizationv1.ResourceAttributes{
+			Namespace: "foo",
+			Verb:      "create",
+			Group:     "",
+			Version:   "v1",
+			Resource:  "configmaps",
+		},
+	}}
+	result, err := adminClient.AuthorizationV1().SubjectAccessReviews().Create(context.TODO(), sar, metav1.CreateOptions{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if result.Status.Allowed {
+		t.Fatal("expected denied, got allowed")
+	}
+
+	authutil.GrantUserAuthorization(t, context.TODO(), adminClient, "alice",
+		rbacv1.PolicyRule{
+			Verbs:     []string{"create"},
+			APIGroups: []string{""},
+			Resources: []string{"configmaps"},
+		},
+	)
+
+	result, err = adminClient.AuthorizationV1().SubjectAccessReviews().Create(context.TODO(), sar, metav1.CreateOptions{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !result.Status.Allowed {
+		t.Fatal("expected allowed, got denied")
+	}
+}