etcdserver: call refreshRangePermCache on Recover() in AuthStore

Signed-off-by: Oleg Guba <oleg@dropbox.com>

server/auth/range_perm_cache.go

@@ -131,6 +131,8 @@ func (as *authStore) refreshRangePermCache(tx AuthReadTx) {
 	as.rangePermCacheMu.Lock()
 	defer as.rangePermCacheMu.Unlock()
 
+	as.lg.Debug("Refreshing rangePermCache")
+
 	as.rangePermCache = make(map[string]*unifiedRangePermissions)
 
 	users := tx.UnsafeGetAllUsers()

server/auth/store.go

@@ -386,6 +386,7 @@ func (as *authStore) Recover(be AuthBackend) {
 
 	enabled := tx.UnsafeReadAuthEnabled()
 	as.setRevision(tx.UnsafeReadAuthRevision())
+	as.refreshRangePermCache(tx)
 
 	tx.Unlock()
 

tests/e2e/ctl_v3_auth_cluster_test.go

@@ -0,0 +1,125 @@
+// Copyright 2022 The etcd 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 e2e
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	clientv3 "go.etcd.io/etcd/client/v3"
+	"go.etcd.io/etcd/tests/v3/framework/config"
+	"go.etcd.io/etcd/tests/v3/framework/e2e"
+)
+
+func TestAuthCluster(t *testing.T) {
+	e2e.BeforeTest(t)
+	cfg := &e2e.EtcdProcessClusterConfig{
+		ClusterSize:   1,
+		InitialToken:  "new",
+		SnapshotCount: 2,
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	epc, err := e2e.NewEtcdProcessCluster(ctx, t, cfg)
+	if err != nil {
+		t.Fatalf("could not start etcd process cluster (%v)", err)
+	}
+	defer func() {
+		if err := epc.Close(); err != nil {
+			t.Fatalf("could not close test cluster (%v)", err)
+		}
+	}()
+
+	epcClient := epc.Client()
+	createUsers(ctx, t, epcClient)
+
+	if err := epcClient.AuthEnable(ctx); err != nil {
+		t.Fatalf("could not enable Auth: (%v)", err)
+	}
+
+	testUserClientOpts := e2e.WithAuth("test", "testPassword")
+	rootUserClientOpts := e2e.WithAuth("root", "rootPassword")
+
+	// write more than SnapshotCount keys to single leader to make sure snapshot is created
+	for i := 0; i <= 10; i++ {
+		if err := epc.Client(testUserClientOpts).Put(ctx, fmt.Sprintf("/test/%d", i), "test", config.PutOptions{}); err != nil {
+			t.Fatalf("failed to Put (%v)", err)
+		}
+	}
+
+	// start second process
+	if err := epc.StartNewProc(ctx, t, rootUserClientOpts); err != nil {
+		t.Fatalf("could not start second etcd process (%v)", err)
+	}
+
+	// make sure writes to both endpoints are successful
+	endpoints := epc.EndpointsV3()
+	assert.Equal(t, len(endpoints), 2)
+	for _, endpoint := range epc.EndpointsV3() {
+		if err := epc.Client(testUserClientOpts, e2e.WithEndpoints([]string{endpoint})).Put(ctx, "/test/key", endpoint, config.PutOptions{}); err != nil {
+			t.Fatalf("failed to write to Put to %q (%v)", endpoint, err)
+		}
+	}
+
+	// verify all nodes have exact same revision and hash
+	assert.Eventually(t, func() bool {
+		hashKvs, err := epc.Client(rootUserClientOpts).HashKV(ctx, 0)
+		if err != nil {
+			t.Logf("failed to get HashKV: %v", err)
+			return false
+		}
+		if len(hashKvs) != 2 {
+			t.Logf("not exactly 2 hashkv responses returned: %d", len(hashKvs))
+			return false
+		}
+		if hashKvs[0].Header.Revision != hashKvs[1].Header.Revision {
+			t.Logf("The two members' revision (%d, %d) are not equal", hashKvs[0].Header.Revision, hashKvs[1].Header.Revision)
+			return false
+		}
+		assert.Equal(t, hashKvs[0].Hash, hashKvs[1].Hash)
+		return true
+	}, time.Second*5, time.Millisecond*100)
+
+}
+
+func createUsers(ctx context.Context, t *testing.T, client *e2e.EtcdctlV3) {
+	if _, err := client.UserAdd(ctx, "root", "rootPassword", config.UserAddOptions{}); err != nil {
+		t.Fatalf("could not add root user (%v)", err)
+	}
+	if _, err := client.RoleAdd(ctx, "root"); err != nil {
+		t.Fatalf("could not create 'root' role (%v)", err)
+	}
+	if _, err := client.UserGrantRole(ctx, "root", "root"); err != nil {
+		t.Fatalf("could not grant root role to root user (%v)", err)
+	}
+
+	if _, err := client.RoleAdd(ctx, "test"); err != nil {
+		t.Fatalf("could not create 'test' role (%v)", err)
+	}
+	if _, err := client.RoleGrantPermission(ctx, "test", "/test/", "/test0", clientv3.PermissionType(clientv3.PermReadWrite)); err != nil {
+		t.Fatalf("could not RoleGrantPermission (%v)", err)
+	}
+	if _, err := client.UserAdd(ctx, "test", "testPassword", config.UserAddOptions{}); err != nil {
+		t.Fatalf("could not add user test (%v)", err)
+	}
+	if _, err := client.UserGrantRole(ctx, "test", "test"); err != nil {
+		t.Fatalf("could not grant test role user (%v)", err)
+	}
+}