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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.model.provision;
import com.yahoo.config.provision.HostSpec;
import com.yahoo.vespa.model.container.Container;
import org.junit.Test;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* @author hmusum
*/
public class HostsXmlProvisionerTest {
private static final String oneHost = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
"<hosts>\n" +
" <host name=\"test1.yahoo.com\">\n" +
" <alias>node1</alias>\n" +
" <alias>node2</alias>\n" +
" </host>\n" +
"</hosts>";
private static final String threeHosts = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
"<hosts>\n" +
" <host name=\"test1.yahoo.com\">\n" +
" <alias>node1</alias>\n" +
" </host>\n" +
" <host name=\"test2.yahoo.com\">\n" +
" <alias>node2</alias>\n" +
" <alias>node3</alias>\n" +
" </host>\n" +
" <host name=\"test3.yahoo.com\">\n" +
" <alias>node4</alias>\n" +
" </host>\n" +
"</hosts>";
@Test
public void require_basic_works() {
HostsXmlProvisioner hostProvisioner = createProvisioner(threeHosts);
// 4 services, 2 host aliases, mapping to 2 host.
List<String> aliases = createAliases();
Map<String, HostSpec> map = allocate(hostProvisioner, aliases);
assertCorrectNumberOfHosts(map, 2);
for (HostSpec hostSpec : map.values()) {
if (hostSpec.hostname().equals("test2.yahoo.com")) {
assertThat(hostSpec.aliases().size(), is(2));
} else {
assertThat(hostSpec.aliases().size(), is(1));
}
}
assertThat(map.size(), is(2));
assertTrue(map.keySet().containsAll(aliases));
// 5 services, 3 host aliases, mapping to 2 host.
aliases = createAliases(Collections.singletonList("node3"));
map = allocate(hostProvisioner, aliases);
assertCorrectNumberOfHosts(map, 2);
assertThat(map.size(), is(3));
assertTrue(map.keySet().containsAll(aliases));
// 5 services, 3 host aliases, mapping to 3 host.
aliases = createAliases(Collections.singletonList("node4"));
map = allocate(hostProvisioner, aliases);
assertThat(map.size(), is(3));
assertCorrectNumberOfHosts(map, 3);
assertTrue(map.keySet().containsAll(aliases));
assertEquals("", System.getProperty("zookeeper.vespa.clients"));
}
@Test(expected = IllegalArgumentException.class)
public void require_exception_when_unknown_hosts_alias() {
HostsXmlProvisioner hostProvisioner = createProvisioner(oneHost);
hostProvisioner.allocateHost("unknown");
}
private void assertCorrectNumberOfHosts(Map<String, HostSpec> hostToServiceMap, int expectedHostCount) {
Set<String> hostSet = new HashSet<>();
for (HostSpec host : hostToServiceMap.values()) {
hostSet.add(host.hostname());
}
assertThat(hostSet.size(), is(expectedHostCount));
}
private HostsXmlProvisioner createProvisioner(String hosts) {
return new HostsXmlProvisioner(new StringReader(hosts));
}
private List<String> createAliases() {
return createAliases(new ArrayList<>());
}
// Admin services on node1, qrserver on node2 + additional specs
private List<String> createAliases(Collection<String> additionalAliases) {
ArrayList<String> aliases = new ArrayList<>();
aliases.add("node1");
aliases.add("node1");
aliases.add("node1");
aliases.add("node2");
aliases.addAll(additionalAliases);
return aliases;
}
private Map<String, HostSpec> allocate(HostsXmlProvisioner hostProvisioner, List<String> aliases) {
Map<String, HostSpec> map = new LinkedHashMap<>();
for (String alias : aliases) {
map.put(alias, hostProvisioner.allocateHost(alias));
}
return map;
}
@Test
public void require_singlenode_HostAlias_is_used_if_hosts_xml() {
String servicesXml = "<jdisc id='default' version='1.0' />";
HostsXmlProvisioner hostProvisioner = createProvisioner(oneHost);
HostSpec hostSpec = hostProvisioner.allocateHost(Container.SINGLENODE_CONTAINER_SERVICESPEC);
assertThat(hostSpec.hostname(), is("test1.yahoo.com"));
}
}
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