opendaylight/md-sal/sal-cluster-admin/src/test/java/org/opendaylight/controller/cluster/datastore/admin/ClusterAdminRpcServiceTest.java

   1 /*
   2  * Copyright (c) 2015 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.datastore.admin;
   9
  10 import static org.hamcrest.CoreMatchers.anyOf;
  11 import static org.hamcrest.CoreMatchers.containsString;
  12 import static org.junit.Assert.assertEquals;
  13 import static org.junit.Assert.assertNotNull;
  14 import static org.junit.Assert.assertNull;
  15 import static org.junit.Assert.assertThat;
  16 import static org.junit.Assert.assertTrue;
  17 import static org.junit.Assert.fail;
  18 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyNoShardPresent;
  19 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyRaftPeersPresent;
  20 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyRaftState;
  21 import akka.actor.ActorRef;
  22 import akka.actor.PoisonPill;
  23 import akka.actor.Status.Success;
  24 import akka.cluster.Cluster;
  25 import com.google.common.base.Optional;
  26 import com.google.common.collect.ImmutableList;
  27 import com.google.common.collect.ImmutableMap;
  28 import com.google.common.collect.Iterables;
  29 import com.google.common.collect.Lists;
  30 import com.google.common.collect.Sets;
  31 import java.io.File;
  32 import java.io.FileInputStream;
  33 import java.net.URI;
  34 import java.util.AbstractMap.SimpleEntry;
  35 import java.util.ArrayList;
  36 import java.util.Arrays;
  37 import java.util.HashMap;
  38 import java.util.HashSet;
  39 import java.util.List;
  40 import java.util.Map;
  41 import java.util.Map.Entry;
  42 import java.util.Set;
  43 import java.util.concurrent.TimeUnit;
  44 import org.apache.commons.lang3.SerializationUtils;
  45 import org.junit.After;
  46 import org.junit.Before;
  47 import org.junit.Test;
  48 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  49 import org.opendaylight.controller.cluster.datastore.DatastoreContext;
  50 import org.opendaylight.controller.cluster.datastore.DistributedDataStore;
  51 import org.opendaylight.controller.cluster.datastore.MemberNode;
  52 import org.opendaylight.controller.cluster.datastore.MemberNode.RaftStateVerifier;
  53 import org.opendaylight.controller.cluster.datastore.Shard;
  54 import org.opendaylight.controller.cluster.datastore.config.ModuleShardConfiguration;
  55 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  56 import org.opendaylight.controller.cluster.datastore.messages.CreateShard;
  57 import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot;
  58 import org.opendaylight.controller.cluster.raft.RaftState;
  59 import org.opendaylight.controller.cluster.raft.ReplicatedLogImplEntry;
  60 import org.opendaylight.controller.cluster.raft.ServerConfigurationPayload;
  61 import org.opendaylight.controller.cluster.raft.ServerConfigurationPayload.ServerInfo;
  62 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  63 import org.opendaylight.controller.cluster.raft.client.messages.OnDemandRaftState;
  64 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  65 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  66 import org.opendaylight.controller.md.cluster.datastore.model.CarsModel;
  67 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  68 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.AddReplicasForAllShardsOutput;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.AddShardReplicaInputBuilder;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.BackupDatastoreInputBuilder;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.ChangeMemberVotingStatesForAllShardsInputBuilder;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.ChangeMemberVotingStatesForAllShardsOutput;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.ChangeMemberVotingStatesForShardInputBuilder;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.DataStoreType;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.FlipMemberVotingStatesForAllShardsOutput;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.RemoveAllShardReplicasInputBuilder;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.RemoveAllShardReplicasOutput;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.RemoveShardReplicaInputBuilder;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.member.voting.states.input.MemberVotingStateBuilder;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.shard.result.output.ShardResult;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.cluster.admin.rev151013.shard.result.output.ShardResultBuilder;
  83 import org.opendaylight.yangtools.yang.common.RpcError;
  84 import org.opendaylight.yangtools.yang.common.RpcResult;
  85 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  86
  87 /**
  88  * Unit tests for ClusterAdminRpcService.
  89  *
  90  * @author Thomas Pantelis
  91  */
  92 public class ClusterAdminRpcServiceTest {
  93     private static final MemberName MEMBER_1 = MemberName.forName("member-1");
  94     private static final MemberName MEMBER_2 = MemberName.forName("member-2");
  95     private static final MemberName MEMBER_3 = MemberName.forName("member-3");
  96     private final List<MemberNode> memberNodes = new ArrayList<>();
  97
  98     @Before
  99     public void setUp() {
 100         InMemoryJournal.clear();
 101         InMemorySnapshotStore.clear();
 102     }
 103
 104     @After
 105     public void tearDown() {
 106         for (MemberNode m : Lists.reverse(memberNodes)) {
 107             m.cleanup();
 108         }
 109         memberNodes.clear();
 110     }
 111
 112     @Test
 113     public void testBackupDatastore() throws Exception {
 114         MemberNode node = MemberNode.builder(memberNodes).akkaConfig("Member1").
 115                 moduleShardsConfig("module-shards-member1.conf").
 116                 waitForShardLeader("cars", "people").testName("testBackupDatastore").build();
 117
 118         String fileName = "target/testBackupDatastore";
 119         new File(fileName).delete();
 120
 121         ClusterAdminRpcService service = new ClusterAdminRpcService(node.configDataStore(), node.operDataStore());
 122
 123         RpcResult<Void> rpcResult = service .backupDatastore(new BackupDatastoreInputBuilder().
 124                 setFilePath(fileName).build()).get(5, TimeUnit.SECONDS);
 125         verifySuccessfulRpcResult(rpcResult);
 126
 127         try(FileInputStream fis = new FileInputStream(fileName)) {
 128             List<DatastoreSnapshot> snapshots = SerializationUtils.deserialize(fis);
 129             assertEquals("DatastoreSnapshot size", 2, snapshots.size());
 130
 131             ImmutableMap<String, DatastoreSnapshot> map = ImmutableMap.of(snapshots.get(0).getType(), snapshots.get(0),
 132                     snapshots.get(1).getType(), snapshots.get(1));
 133             verifyDatastoreSnapshot(node.configDataStore().getActorContext().getDataStoreName(),
 134                     map.get(node.configDataStore().getActorContext().getDataStoreName()), "cars", "people");
 135         } finally {
 136             new File(fileName).delete();
 137         }
 138
 139         // Test failure by killing a shard.
 140
 141         node.configDataStore().getActorContext().getShardManager().tell(node.datastoreContextBuilder().
 142                 shardInitializationTimeout(200, TimeUnit.MILLISECONDS).build(), ActorRef.noSender());
 143
 144         ActorRef carsShardActor = node.configDataStore().getActorContext().findLocalShard("cars").get();
 145         node.kit().watch(carsShardActor);
 146         carsShardActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 147         node.kit().expectTerminated(carsShardActor);
 148
 149         rpcResult = service.backupDatastore(new BackupDatastoreInputBuilder().setFilePath(fileName).build()).
 150                 get(5, TimeUnit.SECONDS);
 151         assertEquals("isSuccessful", false, rpcResult.isSuccessful());
 152         assertEquals("getErrors", 1, rpcResult.getErrors().size());
 153     }
 154
 155     private static void verifyDatastoreSnapshot(String type, DatastoreSnapshot datastoreSnapshot, String... expShardNames) {
 156         assertNotNull("Missing DatastoreSnapshot for type " + type, datastoreSnapshot);
 157         Set<String> shardNames = new HashSet<>();
 158         for(DatastoreSnapshot.ShardSnapshot s: datastoreSnapshot.getShardSnapshots()) {
 159             shardNames.add(s.getName());
 160         }
 161
 162         assertEquals("DatastoreSnapshot shard names", Sets.newHashSet(expShardNames), shardNames);
 163     }
 164
 165     @Test
 166     public void testAddShardReplica() throws Exception {
 167         String name = "testAddShardReplica";
 168         String moduleShardsConfig = "module-shards-cars-member-1.conf";
 169         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 170                 moduleShardsConfig(moduleShardsConfig).waitForShardLeader("cars").build();
 171
 172         MemberNode newReplicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 173                 moduleShardsConfig(moduleShardsConfig).build();
 174
 175         leaderNode1.waitForMembersUp("member-2");
 176
 177         doAddShardReplica(newReplicaNode2, "cars", "member-1");
 178
 179         MemberNode newReplicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 180                 moduleShardsConfig(moduleShardsConfig).build();
 181
 182         leaderNode1.waitForMembersUp("member-3");
 183         newReplicaNode2.waitForMembersUp("member-3");
 184
 185         doAddShardReplica(newReplicaNode3, "cars", "member-1", "member-2");
 186
 187         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "cars", "member-1", "member-3");
 188         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "cars", "member-1", "member-3");
 189
 190         // Write data to member-2's config datastore and read/verify via member-3
 191         NormalizedNode<?, ?> configCarsNode = writeCarsNodeAndVerify(newReplicaNode2.configDataStore(),
 192                 newReplicaNode3.configDataStore());
 193
 194         // Write data to member-3's oper datastore and read/verify via member-2
 195         writeCarsNodeAndVerify(newReplicaNode3.operDataStore(), newReplicaNode2.operDataStore());
 196
 197         // Verify all data has been replicated. We expect 3 log entries and thus last applied index of 2 -
 198         // 2 ServerConfigurationPayload entries and the transaction payload entry.
 199
 200         RaftStateVerifier verifier = new RaftStateVerifier() {
 201             @Override
 202             public void verify(OnDemandRaftState raftState) {
 203                 assertEquals("Commit index", 2, raftState.getCommitIndex());
 204                 assertEquals("Last applied index", 2, raftState.getLastApplied());
 205             }
 206         };
 207
 208         verifyRaftState(leaderNode1.configDataStore(), "cars", verifier);
 209         verifyRaftState(leaderNode1.operDataStore(), "cars", verifier);
 210
 211         verifyRaftState(newReplicaNode2.configDataStore(), "cars", verifier);
 212         verifyRaftState(newReplicaNode2.operDataStore(), "cars", verifier);
 213
 214         verifyRaftState(newReplicaNode3.configDataStore(), "cars", verifier);
 215         verifyRaftState(newReplicaNode3.operDataStore(), "cars", verifier);
 216
 217         // Restart member-3 and verify the cars config shard is re-instated.
 218
 219         Cluster.get(leaderNode1.kit().getSystem()).down(Cluster.get(newReplicaNode3.kit().getSystem()).selfAddress());
 220         newReplicaNode3.cleanup();
 221
 222         newReplicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 223                 moduleShardsConfig(moduleShardsConfig).createOperDatastore(false).build();
 224
 225         verifyRaftState(newReplicaNode3.configDataStore(), "cars", verifier);
 226         readCarsNodeAndVerify(newReplicaNode3.configDataStore(), configCarsNode);
 227     }
 228
 229     @Test
 230     public void testAddShardReplicaFailures() throws Exception {
 231         String name = "testAddShardReplicaFailures";
 232         MemberNode memberNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name).
 233                 moduleShardsConfig("module-shards-cars-member-1.conf").build();
 234
 235         ClusterAdminRpcService service = new ClusterAdminRpcService(memberNode.configDataStore(),
 236                 memberNode.operDataStore());
 237
 238         RpcResult<Void> rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().
 239                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 240         verifyFailedRpcResult(rpcResult);
 241
 242         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName("cars").
 243                 build()).get(10, TimeUnit.SECONDS);
 244         verifyFailedRpcResult(rpcResult);
 245
 246         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName("people").
 247                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 248         verifyFailedRpcResult(rpcResult);
 249     }
 250
 251     private static NormalizedNode<?, ?> writeCarsNodeAndVerify(DistributedDataStore writeToStore,
 252             DistributedDataStore readFromStore) throws Exception {
 253         DOMStoreWriteTransaction writeTx = writeToStore.newWriteOnlyTransaction();
 254         NormalizedNode<?, ?> carsNode = CarsModel.create();
 255         writeTx.write(CarsModel.BASE_PATH, carsNode);
 256
 257         DOMStoreThreePhaseCommitCohort cohort = writeTx.ready();
 258         Boolean canCommit = cohort .canCommit().get(7, TimeUnit.SECONDS);
 259         assertEquals("canCommit", true, canCommit);
 260         cohort.preCommit().get(5, TimeUnit.SECONDS);
 261         cohort.commit().get(5, TimeUnit.SECONDS);
 262
 263         readCarsNodeAndVerify(readFromStore, carsNode);
 264         return carsNode;
 265     }
 266
 267     private static void readCarsNodeAndVerify(DistributedDataStore readFromStore,
 268             NormalizedNode<?, ?> expCarsNode) throws Exception {
 269         Optional<NormalizedNode<?, ?>> optional = readFromStore.newReadOnlyTransaction().
 270                 read(CarsModel.BASE_PATH).get(15, TimeUnit.SECONDS);
 271         assertEquals("isPresent", true, optional.isPresent());
 272         assertEquals("Data node", expCarsNode, optional.get());
 273     }
 274
 275     private static void doAddShardReplica(MemberNode memberNode, String shardName, String... peerMemberNames)
 276             throws Exception {
 277         memberNode.waitForMembersUp(peerMemberNames);
 278
 279         ClusterAdminRpcService service = new ClusterAdminRpcService(memberNode.configDataStore(),
 280                 memberNode.operDataStore());
 281
 282         RpcResult<Void> rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName(shardName).
 283                 setDataStoreType(DataStoreType.Config).build()).get(10, TimeUnit.SECONDS);
 284         verifySuccessfulRpcResult(rpcResult);
 285
 286         verifyRaftPeersPresent(memberNode.configDataStore(), shardName, peerMemberNames);
 287
 288         Optional<ActorRef> optional = memberNode.operDataStore().getActorContext().findLocalShard(shardName);
 289         assertEquals("Oper shard present", false, optional.isPresent());
 290
 291         rpcResult = service.addShardReplica(new AddShardReplicaInputBuilder().setShardName(shardName).
 292                 setDataStoreType(DataStoreType.Operational).build()).get(10, TimeUnit.SECONDS);
 293         verifySuccessfulRpcResult(rpcResult);
 294
 295         verifyRaftPeersPresent(memberNode.operDataStore(), shardName, peerMemberNames);
 296     }
 297
 298     private static <T> T verifySuccessfulRpcResult(RpcResult<T> rpcResult) {
 299         if(!rpcResult.isSuccessful()) {
 300             if(rpcResult.getErrors().size() > 0) {
 301                 RpcError error = Iterables.getFirst(rpcResult.getErrors(), null);
 302                 throw new AssertionError("Rpc failed with error: " + error, error.getCause());
 303             }
 304
 305             fail("Rpc failed with no error");
 306         }
 307
 308         return rpcResult.getResult();
 309     }
 310
 311     private static void verifyFailedRpcResult(RpcResult<Void> rpcResult) {
 312         assertEquals("RpcResult", false, rpcResult.isSuccessful());
 313         assertEquals("RpcResult errors size", 1, rpcResult.getErrors().size());
 314         RpcError error = Iterables.getFirst(rpcResult.getErrors(), null);
 315         assertNotNull("RpcResult error message null", error.getMessage());
 316     }
 317
 318     @Test
 319     public void testRemoveShardReplica() throws Exception {
 320         String name = "testRemoveShardReplicaLocal";
 321         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 322         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 323                 moduleShardsConfig(moduleShardsConfig).
 324                 datastoreContextBuilder(DatastoreContext.newBuilder().
 325                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 326
 327         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 328                 moduleShardsConfig(moduleShardsConfig).build();
 329
 330         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 331                 moduleShardsConfig(moduleShardsConfig).build();
 332
 333         leaderNode1.configDataStore().waitTillReady();
 334         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 335         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 336         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 337
 338         // Invoke RPC service on member-3 to remove it's local shard
 339
 340         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 341                 replicaNode3.operDataStore());
 342
 343         RpcResult<Void> rpcResult = service3.removeShardReplica(new RemoveShardReplicaInputBuilder().
 344                 setShardName("cars").setMemberName("member-3").setDataStoreType(DataStoreType.Config).build()).
 345                         get(10, TimeUnit.SECONDS);
 346         verifySuccessfulRpcResult(rpcResult);
 347
 348         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2");
 349         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 350         verifyNoShardPresent(replicaNode3.configDataStore(), "cars");
 351
 352         // Restart member-2 and verify member-3 isn't present.
 353
 354         Cluster.get(leaderNode1.kit().getSystem()).down(Cluster.get(replicaNode2.kit().getSystem()).selfAddress());
 355         replicaNode2.cleanup();
 356
 357         replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 358                 moduleShardsConfig(moduleShardsConfig).build();
 359
 360         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 361
 362         // Invoke RPC service on member-1 to remove member-2
 363
 364         ClusterAdminRpcService service1 = new ClusterAdminRpcService(leaderNode1.configDataStore(),
 365                 leaderNode1.operDataStore());
 366
 367         rpcResult = service1.removeShardReplica(new RemoveShardReplicaInputBuilder().
 368                 setShardName("cars").setMemberName("member-2").setDataStoreType(DataStoreType.Config).build()).
 369                         get(10, TimeUnit.SECONDS);
 370         verifySuccessfulRpcResult(rpcResult);
 371
 372         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars");
 373         verifyNoShardPresent(replicaNode2.configDataStore(), "cars");
 374     }
 375
 376     @Test
 377     public void testRemoveShardLeaderReplica() throws Exception {
 378         String name = "testRemoveShardLeaderReplica";
 379         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 380         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 381                 moduleShardsConfig(moduleShardsConfig).
 382                 datastoreContextBuilder(DatastoreContext.newBuilder().
 383                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 384
 385         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 386                 moduleShardsConfig(moduleShardsConfig).build();
 387
 388         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 389                 moduleShardsConfig(moduleShardsConfig).build();
 390
 391         leaderNode1.configDataStore().waitTillReady();
 392         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 393         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 394         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 395
 396         replicaNode2.waitForMembersUp("member-1", "member-3");
 397         replicaNode2.waitForMembersUp("member-1", "member-2");
 398
 399         // Invoke RPC service on leader member-1 to remove it's local shard
 400
 401         ClusterAdminRpcService service1 = new ClusterAdminRpcService(leaderNode1.configDataStore(),
 402                 leaderNode1.operDataStore());
 403
 404         RpcResult<Void> rpcResult = service1.removeShardReplica(new RemoveShardReplicaInputBuilder().
 405                 setShardName("cars").setMemberName("member-1").setDataStoreType(DataStoreType.Config).build()).
 406                         get(10, TimeUnit.SECONDS);
 407         verifySuccessfulRpcResult(rpcResult);
 408
 409         verifyRaftState(replicaNode2.configDataStore(), "cars", new RaftStateVerifier() {
 410             @Override
 411             public void verify(OnDemandRaftState raftState) {
 412                 assertThat("Leader Id", raftState.getLeader(), anyOf(containsString("member-2"),
 413                         containsString("member-3")));
 414             }
 415         });
 416
 417         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-3");
 418         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-2");
 419         verifyNoShardPresent(leaderNode1.configDataStore(), "cars");
 420     }
 421
 422     @Test
 423     public void testAddReplicasForAllShards() throws Exception {
 424         String name = "testAddReplicasForAllShards";
 425         String moduleShardsConfig = "module-shards-member1.conf";
 426         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 427                 moduleShardsConfig(moduleShardsConfig).waitForShardLeader("cars", "people").build();
 428
 429         ModuleShardConfiguration petsModuleConfig = new ModuleShardConfiguration(URI.create("pets-ns"), "pets-module",
 430                 "pets", null, Arrays.asList(MEMBER_1));
 431         leaderNode1.configDataStore().getActorContext().getShardManager().tell(
 432                 new CreateShard(petsModuleConfig, Shard.builder(), null), leaderNode1.kit().getRef());
 433         leaderNode1.kit().expectMsgClass(Success.class);
 434         leaderNode1.kit().waitUntilLeader(leaderNode1.configDataStore().getActorContext(), "pets");
 435
 436         MemberNode newReplicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 437                 moduleShardsConfig(moduleShardsConfig).build();
 438
 439         leaderNode1.waitForMembersUp("member-2");
 440         newReplicaNode2.waitForMembersUp("member-1");
 441
 442         newReplicaNode2.configDataStore().getActorContext().getShardManager().tell(
 443                 new CreateShard(petsModuleConfig, Shard.builder(), null), newReplicaNode2.kit().getRef());
 444         newReplicaNode2.kit().expectMsgClass(Success.class);
 445
 446         newReplicaNode2.operDataStore().getActorContext().getShardManager().tell(
 447                 new CreateShard(new ModuleShardConfiguration(URI.create("no-leader-ns"), "no-leader-module",
 448                         "no-leader", null, Arrays.asList(MEMBER_1)), Shard.builder(), null),
 449                                 newReplicaNode2.kit().getRef());
 450         newReplicaNode2.kit().expectMsgClass(Success.class);
 451
 452         ClusterAdminRpcService service = new ClusterAdminRpcService(newReplicaNode2.configDataStore(),
 453                 newReplicaNode2.operDataStore());
 454
 455         RpcResult<AddReplicasForAllShardsOutput> rpcResult = service.addReplicasForAllShards().get(10, TimeUnit.SECONDS);
 456         AddReplicasForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 457         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 458                 successShardResult("people", DataStoreType.Config),
 459                 successShardResult("pets", DataStoreType.Config),
 460                 successShardResult("cars", DataStoreType.Operational),
 461                 successShardResult("people", DataStoreType.Operational),
 462                 failedShardResult("no-leader", DataStoreType.Operational));
 463
 464         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "cars", "member-1");
 465         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "people", "member-1");
 466         verifyRaftPeersPresent(newReplicaNode2.configDataStore(), "pets", "member-1");
 467         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "cars", "member-1");
 468         verifyRaftPeersPresent(newReplicaNode2.operDataStore(), "people", "member-1");
 469     }
 470
 471     @Test
 472     public void testRemoveAllShardReplicas() throws Exception {
 473         String name = "testRemoveAllShardReplicas";
 474         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 475         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 476                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 477                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 478
 479         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 480                 moduleShardsConfig(moduleShardsConfig).build();
 481
 482         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 483                 moduleShardsConfig(moduleShardsConfig).build();
 484
 485         leaderNode1.configDataStore().waitTillReady();
 486         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 487         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 488         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 489
 490         ModuleShardConfiguration petsModuleConfig = new ModuleShardConfiguration(URI.create("pets-ns"), "pets-module",
 491                 "pets", null, Arrays.asList(MEMBER_1, MEMBER_2, MEMBER_3));
 492         leaderNode1.configDataStore().getActorContext().getShardManager().tell(
 493                 new CreateShard(petsModuleConfig, Shard.builder(), null), leaderNode1.kit().getRef());
 494         leaderNode1.kit().expectMsgClass(Success.class);
 495
 496         replicaNode2.configDataStore().getActorContext().getShardManager().tell(
 497                 new CreateShard(petsModuleConfig, Shard.builder(), null), replicaNode2.kit().getRef());
 498         replicaNode2.kit().expectMsgClass(Success.class);
 499
 500         replicaNode3.configDataStore().getActorContext().getShardManager().tell(
 501                 new CreateShard(petsModuleConfig, Shard.builder(), null), replicaNode3.kit().getRef());
 502         replicaNode3.kit().expectMsgClass(Success.class);
 503
 504         verifyRaftPeersPresent(leaderNode1.configDataStore(), "pets", "member-2", "member-3");
 505         verifyRaftPeersPresent(replicaNode2.configDataStore(), "pets", "member-1", "member-3");
 506         verifyRaftPeersPresent(replicaNode3.configDataStore(), "pets", "member-1", "member-2");
 507
 508         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 509                 replicaNode3.operDataStore());
 510
 511         RpcResult<RemoveAllShardReplicasOutput> rpcResult = service3.removeAllShardReplicas(
 512                 new RemoveAllShardReplicasInputBuilder().setMemberName("member-3").build()).get(10, TimeUnit.SECONDS);
 513         RemoveAllShardReplicasOutput result = verifySuccessfulRpcResult(rpcResult);
 514         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 515                 successShardResult("people", DataStoreType.Config),
 516                 successShardResult("pets", DataStoreType.Config),
 517                 successShardResult("cars", DataStoreType.Operational),
 518                 successShardResult("people", DataStoreType.Operational));
 519
 520         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2");
 521         verifyRaftPeersPresent(leaderNode1.configDataStore(), "people", "member-2");
 522         verifyRaftPeersPresent(leaderNode1.configDataStore(), "pets", "member-2");
 523         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1");
 524         verifyRaftPeersPresent(replicaNode2.configDataStore(), "people", "member-1");
 525         verifyRaftPeersPresent(replicaNode2.configDataStore(), "pets", "member-1");
 526         verifyNoShardPresent(replicaNode3.configDataStore(), "cars");
 527         verifyNoShardPresent(replicaNode3.configDataStore(), "people");
 528         verifyNoShardPresent(replicaNode3.configDataStore(), "pets");
 529     }
 530
 531     @Test
 532     public void testChangeMemberVotingStatesForShard() throws Exception {
 533         String name = "testChangeMemberVotingStatusForShard";
 534         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 535         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 536                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 537                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 538
 539         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 540                 moduleShardsConfig(moduleShardsConfig).build();
 541
 542         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 543                 moduleShardsConfig(moduleShardsConfig).build();
 544
 545         leaderNode1.configDataStore().waitTillReady();
 546         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 547         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 548         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 549
 550         // Invoke RPC service on member-3 to change voting status
 551
 552         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 553                 replicaNode3.operDataStore());
 554
 555         RpcResult<Void> rpcResult = service3.changeMemberVotingStatesForShard(
 556                 new ChangeMemberVotingStatesForShardInputBuilder().setShardName("cars").
 557                     setDataStoreType(DataStoreType.Config).setMemberVotingState(ImmutableList.of(
 558                         new MemberVotingStateBuilder().setMemberName("member-2").setVoting(false).build(),
 559                         new MemberVotingStateBuilder().setMemberName("member-3").setVoting(false).build())).build()).
 560                 get(10, TimeUnit.SECONDS);
 561         verifySuccessfulRpcResult(rpcResult);
 562
 563         verifyVotingStates(leaderNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 564                 new SimpleEntry<>("member-3", false));
 565         verifyVotingStates(replicaNode2.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 566                 new SimpleEntry<>("member-3", false));
 567         verifyVotingStates(replicaNode3.configDataStore(), "cars", new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 568                 new SimpleEntry<>("member-3", false));
 569     }
 570
 571     @Test
 572     public void testChangeMemberVotingStatesForSingleNodeShard() throws Exception {
 573         String name = "testChangeMemberVotingStatesForSingleNodeShard";
 574         String moduleShardsConfig = "module-shards-member1.conf";
 575         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 576                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 577                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 578
 579         leaderNode.configDataStore().waitTillReady();
 580
 581         // Invoke RPC service on member-3 to change voting status
 582
 583         ClusterAdminRpcService service = new ClusterAdminRpcService(leaderNode.configDataStore(),
 584                 leaderNode.operDataStore());
 585
 586         RpcResult<Void> rpcResult = service.changeMemberVotingStatesForShard(
 587                 new ChangeMemberVotingStatesForShardInputBuilder().setShardName("cars").
 588                     setDataStoreType(DataStoreType.Config).setMemberVotingState(ImmutableList.of(
 589                         new MemberVotingStateBuilder().setMemberName("member-1").setVoting(false).build())).build()).
 590                 get(10, TimeUnit.SECONDS);
 591         verifyFailedRpcResult(rpcResult);
 592
 593         verifyVotingStates(leaderNode.configDataStore(), "cars", new SimpleEntry<>("member-1", true));
 594     }
 595
 596     @Test
 597     public void testChangeMemberVotingStatesForAllShards() throws Exception {
 598         String name = "testChangeMemberVotingStatesForAllShards";
 599         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 600         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 601                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 602                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 603
 604         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 605                 moduleShardsConfig(moduleShardsConfig).build();
 606
 607         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 608                 moduleShardsConfig(moduleShardsConfig).build();
 609
 610         leaderNode1.configDataStore().waitTillReady();
 611         leaderNode1.operDataStore().waitTillReady();
 612         verifyRaftPeersPresent(leaderNode1.configDataStore(), "cars", "member-2", "member-3");
 613         verifyRaftPeersPresent(replicaNode2.configDataStore(), "cars", "member-1", "member-3");
 614         verifyRaftPeersPresent(replicaNode3.configDataStore(), "cars", "member-1", "member-2");
 615
 616         // Invoke RPC service on member-3 to change voting status
 617
 618         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 619                 replicaNode3.operDataStore());
 620
 621         RpcResult<ChangeMemberVotingStatesForAllShardsOutput> rpcResult = service3.changeMemberVotingStatesForAllShards(
 622                 new ChangeMemberVotingStatesForAllShardsInputBuilder().setMemberVotingState(ImmutableList.of(
 623                         new MemberVotingStateBuilder().setMemberName("member-2").setVoting(false).build(),
 624                         new MemberVotingStateBuilder().setMemberName("member-3").setVoting(false).build())).build()).
 625                 get(10, TimeUnit.SECONDS);
 626         ChangeMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 627         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 628                 successShardResult("people", DataStoreType.Config),
 629                 successShardResult("cars", DataStoreType.Operational),
 630                 successShardResult("people", DataStoreType.Operational));
 631
 632         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 633                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 634                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 635                 new String[]{"cars", "people"}, new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", false),
 636                 new SimpleEntry<>("member-3", false));
 637     }
 638
 639     @Test
 640     public void testFlipMemberVotingStates() throws Exception {
 641         String name = "testFlipMemberVotingStates";
 642
 643         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
 644                 new ServerInfo("member-1", true), new ServerInfo("member-2", true),
 645                 new ServerInfo("member-3", false)));
 646
 647         setupPersistedServerConfigPayload(persistedServerConfig, "member-1", name, "cars", "people");
 648         setupPersistedServerConfigPayload(persistedServerConfig, "member-2", name, "cars", "people");
 649         setupPersistedServerConfigPayload(persistedServerConfig, "member-3", name, "cars", "people");
 650
 651         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 652         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 653                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 654                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 655
 656         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 657                 moduleShardsConfig(moduleShardsConfig).build();
 658
 659         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 660                 moduleShardsConfig(moduleShardsConfig).build();
 661
 662         leaderNode1.configDataStore().waitTillReady();
 663         leaderNode1.operDataStore().waitTillReady();
 664         verifyVotingStates(leaderNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", true),
 665                 new SimpleEntry<>("member-2", true), new SimpleEntry<>("member-3", false));
 666
 667         ClusterAdminRpcService service3 = new ClusterAdminRpcService(replicaNode3.configDataStore(),
 668                 replicaNode3.operDataStore());
 669
 670         RpcResult<FlipMemberVotingStatesForAllShardsOutput> rpcResult = service3.flipMemberVotingStatesForAllShards().
 671                 get(10, TimeUnit.SECONDS);
 672         FlipMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 673         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 674                 successShardResult("people", DataStoreType.Config),
 675                 successShardResult("cars", DataStoreType.Operational),
 676                 successShardResult("people", DataStoreType.Operational));
 677
 678         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 679                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 680                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 681                 new String[]{"cars", "people"},
 682                 new SimpleEntry<>("member-1", false), new SimpleEntry<>("member-2", false),
 683                 new SimpleEntry<>("member-3", true));
 684
 685         // Leadership should have transferred to member 3 since it is the only remaining voting member.
 686         verifyRaftState(leaderNode1.configDataStore(), "cars", raftState -> {
 687             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 688             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 689                     raftState.getLeader().contains("member-3"));
 690         });
 691
 692         verifyRaftState(leaderNode1.operDataStore(), "cars", raftState -> {
 693             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 694             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 695                     raftState.getLeader().contains("member-3"));
 696         });
 697
 698         // Flip the voting states back to the original states.
 699
 700         rpcResult = service3.flipMemberVotingStatesForAllShards(). get(10, TimeUnit.SECONDS);
 701         result = verifySuccessfulRpcResult(rpcResult);
 702         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 703                 successShardResult("people", DataStoreType.Config),
 704                 successShardResult("cars", DataStoreType.Operational),
 705                 successShardResult("people", DataStoreType.Operational));
 706
 707         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 708                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 709                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 710                 new String[]{"cars", "people"},
 711                 new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", true),
 712                 new SimpleEntry<>("member-3", false));
 713
 714         // Leadership should have transferred to member 1 or 2.
 715         verifyRaftState(leaderNode1.configDataStore(), "cars", raftState -> {
 716             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 717             assertTrue("Expected leader member-1 or member-2. Actual: " + raftState.getLeader(),
 718                     raftState.getLeader().contains("member-1") || raftState.getLeader().contains("member-2"));
 719         });
 720     }
 721
 722     @Test
 723     public void testFlipMemberVotingStatesWithNoInitialLeader() throws Exception {
 724         String name = "testFlipMemberVotingStatesWithNoInitialLeader";
 725
 726         // Members 1, 2, and 3 are initially started up as non-voting. Members 4, 5, and 6 are initially
 727         // non-voting and simulated as down by not starting them up.
 728         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
 729                 new ServerInfo("member-1", false), new ServerInfo("member-2", false),
 730                 new ServerInfo("member-3", false), new ServerInfo("member-4", true),
 731                 new ServerInfo("member-5", true), new ServerInfo("member-6", true)));
 732
 733         setupPersistedServerConfigPayload(persistedServerConfig, "member-1", name, "cars", "people");
 734         setupPersistedServerConfigPayload(persistedServerConfig, "member-2", name, "cars", "people");
 735         setupPersistedServerConfigPayload(persistedServerConfig, "member-3", name, "cars", "people");
 736
 737         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 738         MemberNode replicaNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 739                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 740                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 741
 742         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 743                 moduleShardsConfig(moduleShardsConfig).build();
 744
 745         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 746                 moduleShardsConfig(moduleShardsConfig).build();
 747
 748         // Initially there won't be a leader b/c all the up nodes are non-voting.
 749
 750         replicaNode1.waitForMembersUp("member-2", "member-3");
 751
 752         verifyVotingStates(replicaNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", false),
 753                 new SimpleEntry<>("member-2", false), new SimpleEntry<>("member-3", false),
 754                 new SimpleEntry<>("member-4", true), new SimpleEntry<>("member-5", true),
 755                 new SimpleEntry<>("member-6", true));
 756
 757         verifyRaftState(replicaNode1.configDataStore(), "cars", raftState ->
 758             assertEquals("Expected raft state", RaftState.Follower.toString(), raftState.getRaftState()));
 759
 760         ClusterAdminRpcService service1 = new ClusterAdminRpcService(replicaNode1.configDataStore(),
 761                 replicaNode1.operDataStore());
 762
 763         RpcResult<FlipMemberVotingStatesForAllShardsOutput> rpcResult = service1.flipMemberVotingStatesForAllShards().
 764                 get(10, TimeUnit.SECONDS);
 765         FlipMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 766         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 767                 successShardResult("people", DataStoreType.Config),
 768                 successShardResult("cars", DataStoreType.Operational),
 769                 successShardResult("people", DataStoreType.Operational));
 770
 771         verifyVotingStates(new DistributedDataStore[]{replicaNode1.configDataStore(), replicaNode1.operDataStore(),
 772                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 773                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 774                 new String[]{"cars", "people"},
 775                 new SimpleEntry<>("member-1", true), new SimpleEntry<>("member-2", true),
 776                 new SimpleEntry<>("member-3", true), new SimpleEntry<>("member-4", false),
 777                 new SimpleEntry<>("member-5", false), new SimpleEntry<>("member-6", false));
 778
 779         // Since member 1 was changed to voting and there was no leader, it should've started and election
 780         // and become leader
 781         verifyRaftState(replicaNode1.configDataStore(), "cars", raftState -> {
 782             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 783             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 784                     raftState.getLeader().contains("member-1"));
 785         });
 786
 787         verifyRaftState(replicaNode1.operDataStore(), "cars", raftState -> {
 788             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 789             assertTrue("Expected leader member-1. Actual: " + raftState.getLeader(),
 790                     raftState.getLeader().contains("member-1"));
 791         });
 792     }
 793
 794     @Test
 795     public void testFlipMemberVotingStatesWithVotingMembersDown() throws Exception {
 796         String name = "testFlipMemberVotingStatesWithVotingMembersDown";
 797
 798         // Members 4, 5, and 6 are initially non-voting and simulated as down by not starting them up.
 799         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
 800                 new ServerInfo("member-1", true), new ServerInfo("member-2", true),
 801                 new ServerInfo("member-3", true), new ServerInfo("member-4", false),
 802                 new ServerInfo("member-5", false), new ServerInfo("member-6", false)));
 803
 804         setupPersistedServerConfigPayload(persistedServerConfig, "member-1", name, "cars", "people");
 805         setupPersistedServerConfigPayload(persistedServerConfig, "member-2", name, "cars", "people");
 806         setupPersistedServerConfigPayload(persistedServerConfig, "member-3", name, "cars", "people");
 807
 808         String moduleShardsConfig = "module-shards-member1-and-2-and-3.conf";
 809         MemberNode leaderNode1 = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name ).
 810                 moduleShardsConfig(moduleShardsConfig).datastoreContextBuilder(DatastoreContext.newBuilder().
 811                         shardHeartbeatIntervalInMillis(300).shardElectionTimeoutFactor(1)).build();
 812
 813         MemberNode replicaNode2 = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name).
 814                 moduleShardsConfig(moduleShardsConfig).build();
 815
 816         MemberNode replicaNode3 = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name).
 817                 moduleShardsConfig(moduleShardsConfig).build();
 818
 819         leaderNode1.configDataStore().waitTillReady();
 820         leaderNode1.operDataStore().waitTillReady();
 821         verifyVotingStates(leaderNode1.configDataStore(), "cars", new SimpleEntry<>("member-1", true),
 822                 new SimpleEntry<>("member-2", true), new SimpleEntry<>("member-3", true),
 823                 new SimpleEntry<>("member-4", false), new SimpleEntry<>("member-5", false),
 824                 new SimpleEntry<>("member-6", false));
 825
 826         ClusterAdminRpcService service1 = new ClusterAdminRpcService(leaderNode1.configDataStore(),
 827                 leaderNode1.operDataStore());
 828
 829         RpcResult<FlipMemberVotingStatesForAllShardsOutput> rpcResult = service1.flipMemberVotingStatesForAllShards().
 830                 get(10, TimeUnit.SECONDS);
 831         FlipMemberVotingStatesForAllShardsOutput result = verifySuccessfulRpcResult(rpcResult);
 832         verifyShardResults(result.getShardResult(), successShardResult("cars", DataStoreType.Config),
 833                 successShardResult("people", DataStoreType.Config),
 834                 successShardResult("cars", DataStoreType.Operational),
 835                 successShardResult("people", DataStoreType.Operational));
 836
 837         // Members 2 and 3 are now non-voting but should get replicated with the new new server config.
 838         verifyVotingStates(new DistributedDataStore[]{leaderNode1.configDataStore(), leaderNode1.operDataStore(),
 839                 replicaNode2.configDataStore(), replicaNode2.operDataStore(),
 840                 replicaNode3.configDataStore(), replicaNode3.operDataStore()},
 841                 new String[]{"cars", "people"},
 842                 new SimpleEntry<>("member-1", false), new SimpleEntry<>("member-2", false),
 843                 new SimpleEntry<>("member-3", false), new SimpleEntry<>("member-4", true),
 844                 new SimpleEntry<>("member-5", true), new SimpleEntry<>("member-6", true));
 845
 846         // The leader (member 1) was changed to non-voting but it shouldn't be able to step down as leader yet
 847         // b/c it can't get a majority consensus with all voting members down. So verify it remains the leader.
 848         verifyRaftState(leaderNode1.configDataStore(), "cars", raftState -> {
 849             assertNotNull("Expected non-null leader Id", raftState.getLeader());
 850             assertTrue("Expected leader member-1", raftState.getLeader().contains("member-1"));
 851         });
 852     }
 853
 854     private void setupPersistedServerConfigPayload(ServerConfigurationPayload serverConfig,
 855             String member, String datastoreTypeSuffix, String... shards) {
 856         String[] datastoreTypes = {"config_", "oper_"};
 857         for(String type: datastoreTypes) {
 858             for(String shard: shards) {
 859                 List<ServerInfo> newServerInfo = new ArrayList<>(serverConfig.getServerConfig().size());
 860                 for(ServerInfo info: serverConfig.getServerConfig()) {
 861                     newServerInfo.add(new ServerInfo(ShardIdentifier.create(shard, MemberName.forName(info.getId()),
 862                             type + datastoreTypeSuffix).toString(), info.isVoting()));
 863                 }
 864
 865                 String shardID = ShardIdentifier.create(shard, MemberName.forName(member),
 866                         type + datastoreTypeSuffix).toString();
 867                 InMemoryJournal.addEntry(shardID, 1, new UpdateElectionTerm(1, null));
 868                 InMemoryJournal.addEntry(shardID, 2, new ReplicatedLogImplEntry(0, 1,
 869                         new ServerConfigurationPayload(newServerInfo)));
 870             }
 871         }
 872     }
 873
 874     @SafeVarargs
 875     private static void verifyVotingStates(DistributedDataStore[] datastores, String[] shards,
 876             SimpleEntry<String, Boolean>... expStates) throws Exception {
 877         for(DistributedDataStore datastore: datastores) {
 878             for(String shard: shards) {
 879                 verifyVotingStates(datastore, shard, expStates);
 880             }
 881         }
 882     }
 883
 884     @SafeVarargs
 885     private static void verifyVotingStates(DistributedDataStore datastore, String shardName,
 886             SimpleEntry<String, Boolean>... expStates) throws Exception {
 887         String localMemberName = datastore.getActorContext().getCurrentMemberName().getName();
 888         Map<String, Boolean> expStateMap = new HashMap<>();
 889         for(Entry<String, Boolean> e: expStates) {
 890             expStateMap.put(ShardIdentifier.create(shardName, MemberName.forName(e.getKey()),
 891                     datastore.getActorContext().getDataStoreName()).toString(), e.getValue());
 892         }
 893
 894         verifyRaftState(datastore, shardName, raftState -> {
 895             String localPeerId = ShardIdentifier.create(shardName, MemberName.forName(localMemberName),
 896                     datastore.getActorContext().getDataStoreName()).toString();
 897             assertEquals("Voting state for " + localPeerId, expStateMap.get(localPeerId), raftState.isVoting());
 898             for(Entry<String, Boolean> e: raftState.getPeerVotingStates().entrySet()) {
 899                 assertEquals("Voting state for " + e.getKey(), expStateMap.get(e.getKey()), e.getValue());
 900             }
 901         });
 902     }
 903
 904     private static void verifyShardResults(List<ShardResult> shardResults, ShardResult... expShardResults) {
 905         Map<String, ShardResult> expResultsMap = new HashMap<>();
 906         for(ShardResult r: expShardResults) {
 907             expResultsMap.put(r.getShardName() + "-" + r.getDataStoreType(), r);
 908         }
 909
 910         for(ShardResult result: shardResults) {
 911             ShardResult exp = expResultsMap.remove(result.getShardName() + "-" + result.getDataStoreType());
 912             assertNotNull(String.format("Unexpected result for shard %s, type %s", result.getShardName(),
 913                     result.getDataStoreType()), exp);
 914             assertEquals("isSucceeded", exp.isSucceeded(), result.isSucceeded());
 915             if(exp.isSucceeded()) {
 916                 assertNull("Expected null error message", result.getErrorMessage());
 917             } else {
 918                 assertNotNull("Expected error message", result.getErrorMessage());
 919             }
 920         }
 921
 922         if(!expResultsMap.isEmpty()) {
 923             fail("Missing shard results for " + expResultsMap.keySet());
 924         }
 925     }
 926
 927     private static ShardResult successShardResult(String shardName, DataStoreType type) {
 928         return new ShardResultBuilder().setDataStoreType(type).setShardName(shardName).setSucceeded(true).build();
 929     }
 930
 931     private static ShardResult failedShardResult(String shardName, DataStoreType type) {
 932         return new ShardResultBuilder().setDataStoreType(type).setShardName(shardName).setSucceeded(false).build();
 933     }
 934 }