/**
* This file is part of Graylog2.
*
* Graylog2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog2. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.bindings.providers;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import org.elasticsearch.common.settings.loader.YamlSettingsLoader;
import org.elasticsearch.node.Node;
import org.elasticsearch.node.NodeBuilder;
import org.graylog2.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Map;
import static com.google.common.base.Strings.isNullOrEmpty;
import static org.elasticsearch.node.NodeBuilder.nodeBuilder;
public class EsNodeProvider implements Provider<Node> {
private static final Logger LOG = LoggerFactory.getLogger(EsNodeProvider.class);
private final Configuration configuration;
@Inject
public EsNodeProvider(Configuration configuration) {
this.configuration = configuration;
}
@Override
@Singleton
public Node get() {
final NodeBuilder builder = nodeBuilder().client(true);
Map<String, String> settings = readNodeSettings(configuration);
builder.settings().put(settings);
return builder.build();
}
public static Map<String, String> readNodeSettings(Configuration conf) {
Map<String, String> settings = Maps.newHashMap();
// Standard Configuration.
settings.put("cluster.name", conf.getEsClusterName());
settings.put("node.name", conf.getEsNodeName());
settings.put("node.master", Boolean.toString(conf.isEsIsMasterEligible()));
settings.put("node.data", Boolean.toString(conf.isEsStoreData()));
settings.put("action.auto_create_index", Boolean.toString(false));
settings.put("http.enabled", Boolean.toString(conf.isEsIsHttpEnabled()));
settings.put("transport.tcp.port", String.valueOf(conf.getEsTransportTcpPort()));
settings.put("discovery.initial_state_timeout", conf.getEsInitialStateTimeout());
settings.put("discovery.zen.ping.multicast.enabled", Boolean.toString(conf.isEsMulticastDiscovery()));
if (conf.getEsUnicastHosts() != null && !conf.getEsUnicastHosts().isEmpty()) {
final ImmutableList.Builder<String> trimmedHosts = ImmutableList.builder();
for (String host : conf.getEsUnicastHosts()) {
trimmedHosts.add(host.trim());
}
settings.put("discovery.zen.ping.unicast.hosts", Joiner.on(",").join(trimmedHosts.build()));
}
if (!isNullOrEmpty(conf.getEsNetworkHost())) {
settings.put("network.host", conf.getEsNetworkHost());
}
if (!isNullOrEmpty(conf.getEsNetworkBindHost())) {
settings.put("network.bind_host", conf.getEsNetworkBindHost());
}
if (!isNullOrEmpty(conf.getEsNetworkPublishHost())) {
settings.put("network.publish_host", conf.getEsNetworkPublishHost());
}
// Overwrite from a custom ElasticSearch config file.
final String esConfigFilePath = conf.getElasticSearchConfigFile();
if (esConfigFilePath != null) {
try {
final byte[] esSettings = Files.readAllBytes(Paths.get(esConfigFilePath));
settings.putAll(new YamlSettingsLoader().load(esSettings));
} catch (IOException e) {
LOG.warn("Cannot read Elasticsearch configuration.");
}
}
return settings;
}
}