/*
* Licensed to Elasticsearch under one or more contributor
* 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.ec2;
import com.amazonaws.services.ec2.model.Tag;
import org.elasticsearch.Version;
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.TransportAddress;
import org.elasticsearch.common.util.BigArrays;
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.Transport;
import org.elasticsearch.transport.TransportService;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.hasSize;
import static org.hamcrest.Matchers.is;
public class Ec2DiscoveryTests extends ESTestCase {
protected static ThreadPool threadPool;
protected MockTransportService transportService;
private Map<String, TransportAddress> poorMansDNS = new ConcurrentHashMap<>();
@BeforeClass
public static void createThreadPool() {
threadPool = new TestThreadPool(Ec2DiscoveryTests.class.getName());
}
@AfterClass
public static void stopThreadPool() throws InterruptedException {
if (threadPool !=null) {
terminate(threadPool);
threadPool = null;
}
}
@Before
public void createTransportService() {
NamedWriteableRegistry namedWriteableRegistry = new NamedWriteableRegistry(Collections.emptyList());
final Transport transport = new MockTcpTransport(Settings.EMPTY, threadPool, BigArrays.NON_RECYCLING_INSTANCE,
new NoneCircuitBreakerService(), namedWriteableRegistry, new NetworkService(Settings.EMPTY, Collections.emptyList()),
Version.CURRENT) {
@Override
public TransportAddress[] addressesFromString(String address, int perAddressLimit) throws UnknownHostException {
// we just need to ensure we don't resolve DNS here
return new TransportAddress[] {poorMansDNS.getOrDefault(address, buildNewFakeTransportAddress())};
}
};
transportService = new MockTransportService(Settings.EMPTY, transport, threadPool, TransportService.NOOP_TRANSPORT_INTERCEPTOR,
null);
}
protected List<DiscoveryNode> buildDynamicNodes(Settings nodeSettings, int nodes) {
return buildDynamicNodes(nodeSettings, nodes, null);
}
protected List<DiscoveryNode> buildDynamicNodes(Settings nodeSettings, int nodes, List<List<Tag>> tagsList) {
AwsEc2Service awsEc2Service = new AwsEc2ServiceMock(nodeSettings, nodes, tagsList);
AwsEc2UnicastHostsProvider provider = new AwsEc2UnicastHostsProvider(nodeSettings, transportService, awsEc2Service);
List<DiscoveryNode> discoveryNodes = provider.buildDynamicNodes();
logger.debug("--> nodes found: {}", discoveryNodes);
return discoveryNodes;
}
public void testDefaultSettings() throws InterruptedException {
int nodes = randomInt(10);
Settings nodeSettings = Settings.builder()
.build();
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes);
assertThat(discoveryNodes, hasSize(nodes));
}
public void testPrivateIp() throws InterruptedException {
int nodes = randomInt(10);
for (int i = 0; i < nodes; i++) {
poorMansDNS.put(AmazonEC2Mock.PREFIX_PRIVATE_IP + (i+1), buildNewFakeTransportAddress());
}
Settings nodeSettings = Settings.builder()
.put(AwsEc2Service.HOST_TYPE_SETTING.getKey(), "private_ip")
.build();
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes);
assertThat(discoveryNodes, hasSize(nodes));
// We check that we are using here expected address
int node = 1;
for (DiscoveryNode discoveryNode : discoveryNodes) {
TransportAddress address = discoveryNode.getAddress();
TransportAddress expected = poorMansDNS.get(AmazonEC2Mock.PREFIX_PRIVATE_IP + node++);
assertEquals(address, expected);
}
}
public void testPublicIp() throws InterruptedException {
int nodes = randomInt(10);
for (int i = 0; i < nodes; i++) {
poorMansDNS.put(AmazonEC2Mock.PREFIX_PUBLIC_IP + (i+1), buildNewFakeTransportAddress());
}
Settings nodeSettings = Settings.builder()
.put(AwsEc2Service.HOST_TYPE_SETTING.getKey(), "public_ip")
.build();
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes);
assertThat(discoveryNodes, hasSize(nodes));
// We check that we are using here expected address
int node = 1;
for (DiscoveryNode discoveryNode : discoveryNodes) {
TransportAddress address = discoveryNode.getAddress();
TransportAddress expected = poorMansDNS.get(AmazonEC2Mock.PREFIX_PUBLIC_IP + node++);
assertEquals(address, expected);
}
}
public void testPrivateDns() throws InterruptedException {
int nodes = randomInt(10);
for (int i = 0; i < nodes; i++) {
String instanceId = "node" + (i+1);
poorMansDNS.put(AmazonEC2Mock.PREFIX_PRIVATE_DNS + instanceId +
AmazonEC2Mock.SUFFIX_PRIVATE_DNS, buildNewFakeTransportAddress());
}
Settings nodeSettings = Settings.builder()
.put(AwsEc2Service.HOST_TYPE_SETTING.getKey(), "private_dns")
.build();
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes);
assertThat(discoveryNodes, hasSize(nodes));
// We check that we are using here expected address
int node = 1;
for (DiscoveryNode discoveryNode : discoveryNodes) {
String instanceId = "node" + node++;
TransportAddress address = discoveryNode.getAddress();
TransportAddress expected = poorMansDNS.get(
AmazonEC2Mock.PREFIX_PRIVATE_DNS + instanceId + AmazonEC2Mock.SUFFIX_PRIVATE_DNS);
assertEquals(address, expected);
}
}
public void testPublicDns() throws InterruptedException {
int nodes = randomInt(10);
for (int i = 0; i < nodes; i++) {
String instanceId = "node" + (i+1);
poorMansDNS.put(AmazonEC2Mock.PREFIX_PUBLIC_DNS + instanceId
+ AmazonEC2Mock.SUFFIX_PUBLIC_DNS, buildNewFakeTransportAddress());
}
Settings nodeSettings = Settings.builder()
.put(AwsEc2Service.HOST_TYPE_SETTING.getKey(), "public_dns")
.build();
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes);
assertThat(discoveryNodes, hasSize(nodes));
// We check that we are using here expected address
int node = 1;
for (DiscoveryNode discoveryNode : discoveryNodes) {
String instanceId = "node" + node++;
TransportAddress address = discoveryNode.getAddress();
TransportAddress expected = poorMansDNS.get(
AmazonEC2Mock.PREFIX_PUBLIC_DNS + instanceId + AmazonEC2Mock.SUFFIX_PUBLIC_DNS);
assertEquals(address, expected);
}
}
public void testInvalidHostType() throws InterruptedException {
Settings nodeSettings = Settings.builder()
.put(AwsEc2Service.HOST_TYPE_SETTING.getKey(), "does_not_exist")
.build();
IllegalArgumentException exception = expectThrows(IllegalArgumentException.class, () -> {
buildDynamicNodes(nodeSettings, 1);
});
assertThat(exception.getMessage(), containsString("does_not_exist is unknown for discovery.ec2.host_type"));
}
public void testFilterByTags() throws InterruptedException {
int nodes = randomIntBetween(5, 10);
Settings nodeSettings = Settings.builder()
.put(AwsEc2Service.TAG_SETTING.getKey() + "stage", "prod")
.build();
int prodInstances = 0;
List<List<Tag>> tagsList = new ArrayList<>();
for (int node = 0; node < nodes; node++) {
List<Tag> tags = new ArrayList<>();
if (randomBoolean()) {
tags.add(new Tag("stage", "prod"));
prodInstances++;
} else {
tags.add(new Tag("stage", "dev"));
}
tagsList.add(tags);
}
logger.info("started [{}] instances with [{}] stage=prod tag", nodes, prodInstances);
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes, tagsList);
assertThat(discoveryNodes, hasSize(prodInstances));
}
public void testFilterByMultipleTags() throws InterruptedException {
int nodes = randomIntBetween(5, 10);
Settings nodeSettings = Settings.builder()
.putArray(AwsEc2Service.TAG_SETTING.getKey() + "stage", "prod", "preprod")
.build();
int prodInstances = 0;
List<List<Tag>> tagsList = new ArrayList<>();
for (int node = 0; node < nodes; node++) {
List<Tag> tags = new ArrayList<>();
if (randomBoolean()) {
tags.add(new Tag("stage", "prod"));
if (randomBoolean()) {
tags.add(new Tag("stage", "preprod"));
prodInstances++;
}
} else {
tags.add(new Tag("stage", "dev"));
if (randomBoolean()) {
tags.add(new Tag("stage", "preprod"));
}
}
tagsList.add(tags);
}
logger.info("started [{}] instances with [{}] stage=prod tag", nodes, prodInstances);
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes, tagsList);
assertThat(discoveryNodes, hasSize(prodInstances));
}
public void testReadHostFromTag() throws InterruptedException, UnknownHostException {
int nodes = randomIntBetween(5, 10);
String[] addresses = new String[nodes];
for (int node = 0; node < nodes; node++) {
addresses[node] = "192.168.0." + (node + 1);
poorMansDNS.put("node" + (node + 1), new TransportAddress(InetAddress.getByName(addresses[node]), 9300));
}
Settings nodeSettings = Settings.builder()
.put(AwsEc2Service.HOST_TYPE_SETTING.getKey(), "tag:foo")
.build();
List<List<Tag>> tagsList = new ArrayList<>();
for (int node = 0; node < nodes; node++) {
List<Tag> tags = new ArrayList<>();
tags.add(new Tag("foo", "node" + (node + 1)));
tagsList.add(tags);
}
logger.info("started [{}] instances", nodes);
List<DiscoveryNode> discoveryNodes = buildDynamicNodes(nodeSettings, nodes, tagsList);
assertThat(discoveryNodes, hasSize(nodes));
for (DiscoveryNode discoveryNode : discoveryNodes) {
TransportAddress address = discoveryNode.getAddress();
TransportAddress expected = poorMansDNS.get(discoveryNode.getName());
assertEquals(address, expected);
}
}
abstract class DummyEc2HostProvider extends AwsEc2UnicastHostsProvider {
public int fetchCount = 0;
DummyEc2HostProvider(Settings settings, TransportService transportService, AwsEc2Service service) {
super(settings, transportService, service);
}
}
public void testGetNodeListEmptyCache() throws Exception {
AwsEc2Service awsEc2Service = new AwsEc2ServiceMock(Settings.EMPTY, 1, null);
DummyEc2HostProvider provider = new DummyEc2HostProvider(Settings.EMPTY, transportService, awsEc2Service) {
@Override
protected List<DiscoveryNode> fetchDynamicNodes() {
fetchCount++;
return new ArrayList<>();
}
};
for (int i=0; i<3; i++) {
provider.buildDynamicNodes();
}
assertThat(provider.fetchCount, is(3));
}
public void testGetNodeListCached() throws Exception {
Settings.Builder builder = Settings.builder()
.put(AwsEc2Service.NODE_CACHE_TIME_SETTING.getKey(), "500ms");
AwsEc2Service awsEc2Service = new AwsEc2ServiceMock(Settings.EMPTY, 1, null);
DummyEc2HostProvider provider = new DummyEc2HostProvider(builder.build(), transportService, awsEc2Service) {
@Override
protected List<DiscoveryNode> fetchDynamicNodes() {
fetchCount++;
return Ec2DiscoveryTests.this.buildDynamicNodes(Settings.EMPTY, 1);
}
};
for (int i=0; i<3; i++) {
provider.buildDynamicNodes();
}
assertThat(provider.fetchCount, is(1));
Thread.sleep(1_000L); // wait for cache to expire
for (int i=0; i<3; i++) {
provider.buildDynamicNodes();
}
assertThat(provider.fetchCount, is(2));
}
}