/**
* Copyright 2016 Yahoo Inc.
*
* 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 com.yahoo.pulsar.zookeeper;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.fail;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.bookkeeper.client.BKException.BKNotEnoughBookiesException;
import org.apache.bookkeeper.conf.ClientConfiguration;
import org.apache.bookkeeper.net.BookieSocketAddress;
import org.apache.bookkeeper.test.PortManager;
import org.apache.bookkeeper.util.ZkUtils;
import org.apache.bookkeeper.zookeeper.ZooKeeperWatcherBase;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.ZooDefs;
import org.apache.zookeeper.ZooKeeper;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.yahoo.pulsar.common.util.ObjectMapperFactory;
public class ZkIsolatedBookieEnsemblePlacementPolicyTest {
private static final String BOOKIE1 = "127.0.0.1:3181";
private static final String BOOKIE2 = "127.0.0.2:3181";
private static final String BOOKIE3 = "127.0.0.3:3181";
private static final String BOOKIE4 = "127.0.0.4:3181";
private static final String BOOKIE5 = "127.0.0.5:3181";
private ZookeeperServerTest localZkS;
private ZooKeeper localZkc;
private final int LOCAL_ZOOKEEPER_PORT = PortManager.nextFreePort();
private final ObjectMapper jsonMapper = ObjectMapperFactory.create();
Set<BookieSocketAddress> writableBookies = new HashSet<>();
Set<BookieSocketAddress> readOnlyBookies = new HashSet<>();
List<String> isolationGroups = new ArrayList<>();
@BeforeMethod
public void setUp() throws Exception {
localZkS = new ZookeeperServerTest(LOCAL_ZOOKEEPER_PORT);
localZkS.start();
ZooKeeperWatcherBase zkWatcherBase = new ZooKeeperWatcherBase(10000);
localZkc = ZkUtils.createConnectedZookeeperClient("127.0.0.1" + ":" + LOCAL_ZOOKEEPER_PORT, zkWatcherBase);
writableBookies.add(new BookieSocketAddress(BOOKIE1));
writableBookies.add(new BookieSocketAddress(BOOKIE2));
writableBookies.add(new BookieSocketAddress(BOOKIE3));
writableBookies.add(new BookieSocketAddress(BOOKIE4));
isolationGroups.add("group1");
}
@AfterMethod
void teardown() throws Exception {
writableBookies.clear();
isolationGroups.clear();
localZkS.close();
}
@Test
public void testBasic() throws Exception {
Map<String, Map<String, BookieInfo>> bookieMapping = new HashMap<>();
Map<String, BookieInfo> mainBookieGroup = new HashMap<>();
BookieInfo bookieInfo0 = new BookieInfo();
bookieInfo0.setRack("rack0");
mainBookieGroup.put(BOOKIE1, bookieInfo0);
BookieInfo bookieInfo1 = new BookieInfo();
bookieInfo1.setRack("rack1");
mainBookieGroup.put(BOOKIE2, bookieInfo1);
Map<String, BookieInfo> secondaryBookieGroup = new HashMap<>();
BookieInfo bookieInfo2 = new BookieInfo();
bookieInfo2.setRack("rack0");
secondaryBookieGroup.put(BOOKIE3, bookieInfo2);
bookieMapping.put("group1", mainBookieGroup);
bookieMapping.put("group2", secondaryBookieGroup);
ZkUtils.createFullPathOptimistic(localZkc, ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH,
jsonMapper.writeValueAsBytes(bookieMapping), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
Thread.sleep(100);
ZkIsolatedBookieEnsemblePlacementPolicy isolationPolicy = new ZkIsolatedBookieEnsemblePlacementPolicy();
ClientConfiguration bkClientConf = new ClientConfiguration();
bkClientConf.setProperty(ZooKeeperCache.ZK_CACHE_INSTANCE, new ZooKeeperCache(localZkc) {
});
bkClientConf.setProperty(ZkIsolatedBookieEnsemblePlacementPolicy.ISOLATION_BOOKIE_GROUPS, isolationGroups);
isolationPolicy.initialize(bkClientConf);
isolationPolicy.onClusterChanged(writableBookies, readOnlyBookies);
ArrayList<BookieSocketAddress> ensemble = isolationPolicy.newEnsemble(3, 3, new HashSet<>());
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE1)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE2)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE4)));
ensemble = isolationPolicy.newEnsemble(1, 1, new HashSet<>());
assertFalse(ensemble.contains(new BookieSocketAddress(BOOKIE3)));
try {
isolationPolicy.newEnsemble(4, 4, new HashSet<>());
fail("should not pass");
} catch (BKNotEnoughBookiesException e) {
// ok
}
Set<BookieSocketAddress> bookieToExclude = new HashSet<>();
bookieToExclude.add(new BookieSocketAddress(BOOKIE1));
ensemble = isolationPolicy.newEnsemble(2, 2, bookieToExclude);
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE4)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE2)));
BookieInfo bookieInfo3 = new BookieInfo();
bookieInfo3.setRack("rack0");
secondaryBookieGroup.put(BOOKIE4, bookieInfo3);
bookieMapping.put("group2", secondaryBookieGroup);
localZkc.setData(ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH, jsonMapper.writeValueAsBytes(bookieMapping),
-1);
Thread.sleep(100);
ensemble = isolationPolicy.newEnsemble(2, 2, null);
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE1)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE2)));
try {
isolationPolicy.newEnsemble(3, 3, new HashSet<>());
fail("should not pass");
} catch (BKNotEnoughBookiesException e) {
// ok
}
try {
isolationPolicy.replaceBookie(new BookieSocketAddress(BOOKIE5), new HashSet<>(ensemble), new HashSet<>());
fail("should not pass");
} catch (BKNotEnoughBookiesException e) {
// ok
}
bookieToExclude = new HashSet<>();
bookieToExclude.add(new BookieSocketAddress(BOOKIE1));
ensemble = isolationPolicy.newEnsemble(1, 1, bookieToExclude);
BookieSocketAddress chosenBookie = isolationPolicy.replaceBookie(new BookieSocketAddress(BOOKIE5),
new HashSet<>(ensemble), null);
assertTrue(chosenBookie.equals(new BookieSocketAddress(BOOKIE1)));
localZkc.delete(ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH, -1);
}
@Test
public void testNoBookieInfo() throws Exception {
ZkIsolatedBookieEnsemblePlacementPolicy isolationPolicy = new ZkIsolatedBookieEnsemblePlacementPolicy();
ClientConfiguration bkClientConf = new ClientConfiguration();
bkClientConf.setProperty(ZooKeeperCache.ZK_CACHE_INSTANCE, new ZooKeeperCache(localZkc) {
});
bkClientConf.setProperty(ZkIsolatedBookieEnsemblePlacementPolicy.ISOLATION_BOOKIE_GROUPS, isolationGroups);
isolationPolicy.initialize(bkClientConf);
isolationPolicy.onClusterChanged(writableBookies, readOnlyBookies);
isolationPolicy.newEnsemble(4, 4, new HashSet<>());
String data = "{\"group1\": {\"" + BOOKIE1
+ "\": {\"rack\": \"rack0\", \"hostname\": \"bookie1.example.com\"}, \"" + BOOKIE2
+ "\": {\"rack\": \"rack1\", \"hostname\": \"bookie2.example.com\"}}, \"group2\": {\"" + BOOKIE3
+ "\": {\"rack\": \"rack0\", \"hostname\": \"bookie3.example.com\"}, \"" + BOOKIE4
+ "\": {\"rack\": \"rack2\", \"hostname\": \"bookie4.example.com\"}}}";
ZkUtils.createFullPathOptimistic(localZkc, ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH, data.getBytes(),
ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
Thread.sleep(100);
ArrayList<BookieSocketAddress> ensemble = isolationPolicy.newEnsemble(2, 2, new HashSet<>());
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE1)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE2)));
try {
isolationPolicy.newEnsemble(3, 3, new HashSet<>());
fail("should not pass");
} catch (BKNotEnoughBookiesException e) {
// ok
}
localZkc.delete(ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH, -1);
}
@Test
public void testBookieInfoChange() throws Exception {
Map<String, Map<String, BookieInfo>> bookieMapping = new HashMap<>();
Map<String, BookieInfo> mainBookieGroup = new HashMap<>();
Map<String, BookieInfo> secondaryBookieGroup = new HashMap<>();
BookieInfo bookieInfo0 = new BookieInfo();
bookieInfo0.setRack("rack0");
mainBookieGroup.put(BOOKIE1, bookieInfo0);
BookieInfo bookieInfo1 = new BookieInfo();
bookieInfo1.setRack("rack1");
mainBookieGroup.put(BOOKIE2, bookieInfo1);
BookieInfo bookieInfo2 = new BookieInfo();
bookieInfo2.setRack("rack0");
secondaryBookieGroup.put(BOOKIE3, bookieInfo2);
BookieInfo bookieInfo3 = new BookieInfo();
bookieInfo3.setRack("rack2");
secondaryBookieGroup.put(BOOKIE4, bookieInfo3);
bookieMapping.put("group1", mainBookieGroup);
bookieMapping.put("group2", secondaryBookieGroup);
ZkUtils.createFullPathOptimistic(localZkc, ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH,
jsonMapper.writeValueAsBytes(bookieMapping), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
Thread.sleep(100);
ZkIsolatedBookieEnsemblePlacementPolicy isolationPolicy = new ZkIsolatedBookieEnsemblePlacementPolicy();
ClientConfiguration bkClientConf = new ClientConfiguration();
bkClientConf.setZkServers("127.0.0.1" + ":" + LOCAL_ZOOKEEPER_PORT);
bkClientConf.setZkTimeout(1000);
bkClientConf.setProperty(ZkIsolatedBookieEnsemblePlacementPolicy.ISOLATION_BOOKIE_GROUPS, isolationGroups);
isolationPolicy.initialize(bkClientConf);
isolationPolicy.onClusterChanged(writableBookies, readOnlyBookies);
ArrayList<BookieSocketAddress> ensemble = isolationPolicy.newEnsemble(2, 2, new HashSet<>());
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE1)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE2)));
try {
isolationPolicy.newEnsemble(3, 3, new HashSet<>());
fail("should not pass");
} catch (BKNotEnoughBookiesException e) {
// ok
}
mainBookieGroup.put(BOOKIE3, bookieInfo2);
secondaryBookieGroup.remove(BOOKIE3);
bookieMapping.put("group1", mainBookieGroup);
bookieMapping.put("group2", secondaryBookieGroup);
localZkc.setData(ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH, jsonMapper.writeValueAsBytes(bookieMapping),
-1);
// wait for the zk to notify and update the mappings
Thread.sleep(100);
ensemble = isolationPolicy.newEnsemble(3, 3, new HashSet<>());
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE1)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE2)));
assertTrue(ensemble.contains(new BookieSocketAddress(BOOKIE3)));
localZkc.delete(ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH, -1);
Thread.sleep(100);
isolationPolicy.newEnsemble(1, 1, new HashSet<>());
}
@Test
public void testNoIsolationGroup() throws Exception {
String data = "{\"group1\": {\"" + BOOKIE1
+ "\": {\"rack\": \"rack0\", \"hostname\": \"bookie1.example.com\"}, \"" + BOOKIE2
+ "\": {\"rack\": \"rack1\", \"hostname\": \"bookie2.example.com\"}}, \"group2\": {\"" + BOOKIE3
+ "\": {\"rack\": \"rack0\", \"hostname\": \"bookie3.example.com\"}, \"" + BOOKIE4
+ "\": {\"rack\": \"rack2\", \"hostname\": \"bookie4.example.com\"}}}";
ZkUtils.createFullPathOptimistic(localZkc, ZkBookieRackAffinityMapping.BOOKIE_INFO_ROOT_PATH, data.getBytes(),
ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
Thread.sleep(100);
ZkIsolatedBookieEnsemblePlacementPolicy isolationPolicy = new ZkIsolatedBookieEnsemblePlacementPolicy();
ClientConfiguration bkClientConf = new ClientConfiguration();
bkClientConf.setProperty(ZooKeeperCache.ZK_CACHE_INSTANCE, new ZooKeeperCache(localZkc) {
});
isolationPolicy.initialize(bkClientConf);
isolationPolicy.onClusterChanged(writableBookies, readOnlyBookies);
isolationPolicy.newEnsemble(4, 4, new HashSet<>());
}
}