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* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.discovery.file;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
import org.elasticsearch.common.network.NetworkService;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.BoundTransportAddress;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.common.util.BigArrays;
import org.elasticsearch.env.Environment;
import org.elasticsearch.indices.breaker.NoneCircuitBreakerService;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.transport.MockTransportService;
import org.elasticsearch.threadpool.TestThreadPool;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.MockTcpTransport;
import org.elasticsearch.transport.TransportService;
import org.junit.After;
import org.junit.Before;
import java.io.BufferedWriter;
import java.io.IOException;
import java.net.InetAddress;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import static org.elasticsearch.discovery.file.FileBasedUnicastHostsProvider.UNICAST_HOSTS_FILE;
import static org.elasticsearch.discovery.file.FileBasedUnicastHostsProvider.UNICAST_HOST_PREFIX;
/**
* Tests for {@link FileBasedUnicastHostsProvider}.
*/
public class FileBasedUnicastHostsProviderTests extends ESTestCase {
private ThreadPool threadPool;
private ExecutorService executorService;
private MockTransportService transportService;
@Before
public void setUp() throws Exception {
super.setUp();
threadPool = new TestThreadPool(FileBasedUnicastHostsProviderTests.class.getName());
executorService = Executors.newSingleThreadExecutor();
}
@After
public void tearDown() throws Exception {
try {
terminate(executorService);
} finally {
try {
terminate(threadPool);
} finally {
super.tearDown();
}
}
}
@Before
public void createTransportSvc() {
MockTcpTransport transport =
new MockTcpTransport(Settings.EMPTY,
threadPool,
BigArrays.NON_RECYCLING_INSTANCE,
new NoneCircuitBreakerService(),
new NamedWriteableRegistry(Collections.emptyList()),
new NetworkService(Settings.EMPTY, Collections.emptyList())) {
@Override
public BoundTransportAddress boundAddress() {
return new BoundTransportAddress(
new TransportAddress[]{new TransportAddress(InetAddress.getLoopbackAddress(), 9300)},
new TransportAddress(InetAddress.getLoopbackAddress(), 9300)
);
}
};
transportService = new MockTransportService(Settings.EMPTY, transport, threadPool, TransportService.NOOP_TRANSPORT_INTERCEPTOR,
null);
}
public void testBuildDynamicNodes() throws Exception {
final List<String> hostEntries = Arrays.asList("#comment, should be ignored", "192.168.0.1", "192.168.0.2:9305", "255.255.23.15");
final List<DiscoveryNode> nodes = setupAndRunHostProvider(hostEntries);
assertEquals(hostEntries.size() - 1, nodes.size()); // minus 1 because we are ignoring the first line that's a comment
assertEquals("192.168.0.1", nodes.get(0).getAddress().getAddress());
assertEquals(9300, nodes.get(0).getAddress().getPort());
assertEquals(UNICAST_HOST_PREFIX + "192.168.0.1_0#", nodes.get(0).getId());
assertEquals("192.168.0.2", nodes.get(1).getAddress().getAddress());
assertEquals(9305, nodes.get(1).getAddress().getPort());
assertEquals(UNICAST_HOST_PREFIX + "192.168.0.2:9305_0#", nodes.get(1).getId());
assertEquals("255.255.23.15", nodes.get(2).getAddress().getAddress());
assertEquals(9300, nodes.get(2).getAddress().getPort());
assertEquals(UNICAST_HOST_PREFIX + "255.255.23.15_0#", nodes.get(2).getId());
}
public void testEmptyUnicastHostsFile() throws Exception {
final List<String> hostEntries = Collections.emptyList();
final List<DiscoveryNode> nodes = setupAndRunHostProvider(hostEntries);
assertEquals(0, nodes.size());
}
public void testUnicastHostsDoesNotExist() throws Exception {
final Settings settings = Settings.builder()
.put(Environment.PATH_HOME_SETTING.getKey(), createTempDir())
.build();
final FileBasedUnicastHostsProvider provider = new FileBasedUnicastHostsProvider(settings, transportService, executorService);
final List<DiscoveryNode> nodes = provider.buildDynamicNodes();
assertEquals(0, nodes.size());
}
public void testInvalidHostEntries() throws Exception {
List<String> hostEntries = Arrays.asList("192.168.0.1:9300:9300");
List<DiscoveryNode> nodes = setupAndRunHostProvider(hostEntries);
assertEquals(0, nodes.size());
}
public void testSomeInvalidHostEntries() throws Exception {
List<String> hostEntries = Arrays.asList("192.168.0.1:9300:9300", "192.168.0.1:9301");
List<DiscoveryNode> nodes = setupAndRunHostProvider(hostEntries);
assertEquals(1, nodes.size()); // only one of the two is valid and will be used
assertEquals("192.168.0.1", nodes.get(0).getAddress().getAddress());
assertEquals(9301, nodes.get(0).getAddress().getPort());
}
// sets up the config dir, writes to the unicast hosts file in the config dir,
// and then runs the file-based unicast host provider to get the list of discovery nodes
private List<DiscoveryNode> setupAndRunHostProvider(final List<String> hostEntries) throws IOException {
final Path homeDir = createTempDir();
final Settings settings = Settings.builder()
.put(Environment.PATH_HOME_SETTING.getKey(), homeDir)
.build();
final Path configDir = homeDir.resolve("config").resolve("discovery-file");
Files.createDirectories(configDir);
final Path unicastHostsPath = configDir.resolve(UNICAST_HOSTS_FILE);
try (BufferedWriter writer = Files.newBufferedWriter(unicastHostsPath)) {
writer.write(String.join("\n", hostEntries));
}
return new FileBasedUnicastHostsProvider(settings, transportService, executorService).buildDynamicNodes();
}
}