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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.solr.core;
import java.io.IOException;
import java.lang.invoke.MethodHandles;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeoutException;
import java.util.function.Predicate;
import org.apache.solr.cloud.CurrentCoreDescriptorProvider;
import org.apache.solr.cloud.SolrZkServer;
import org.apache.solr.cloud.ZkController;
import org.apache.solr.common.AlreadyClosedException;
import org.apache.solr.common.SolrException;
import org.apache.solr.common.cloud.Replica;
import org.apache.solr.common.cloud.ZkConfigManager;
import org.apache.solr.common.cloud.ZooKeeperException;
import org.apache.solr.common.util.ExecutorUtil;
import org.apache.solr.logging.MDCLoggingContext;
import org.apache.solr.util.DefaultSolrThreadFactory;
import org.apache.zookeeper.KeeperException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ZkContainer {
private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
protected ZkController zkController;
private SolrZkServer zkServer;
private ExecutorService coreZkRegister = ExecutorUtil.newMDCAwareCachedThreadPool(
new DefaultSolrThreadFactory("coreZkRegister") );
// see ZkController.zkRunOnly
private boolean zkRunOnly = Boolean.getBoolean("zkRunOnly"); // expert
public ZkContainer() {
}
public void initZooKeeper(final CoreContainer cc, String solrHome, CloudConfig config) {
ZkController zkController = null;
String zkRun = System.getProperty("zkRun");
if (zkRun != null && config == null)
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "Cannot start Solr in cloud mode - no cloud config provided");
if (config == null)
return; // not in zk mode
String zookeeperHost = config.getZkHost();
// zookeeper in quorum mode currently causes a failure when trying to
// register log4j mbeans. See SOLR-2369
// TODO: remove after updating to an slf4j based zookeeper
System.setProperty("zookeeper.jmx.log4j.disable", "true");
if (zkRun != null) {
String zkDataHome = System.getProperty("zkServerDataDir", Paths.get(solrHome).resolve("zoo_data").toString());
String zkConfHome = System.getProperty("zkServerConfDir", solrHome);
zkServer = new SolrZkServer(stripChroot(zkRun), stripChroot(config.getZkHost()), zkDataHome, zkConfHome, config.getSolrHostPort());
zkServer.parseConfig();
zkServer.start();
// set client from server config if not already set
if (zookeeperHost == null) {
zookeeperHost = zkServer.getClientString();
}
}
int zkClientConnectTimeout = 30000;
if (zookeeperHost != null) {
// we are ZooKeeper enabled
try {
// If this is an ensemble, allow for a long connect time for other servers to come up
if (zkRun != null && zkServer.getServers().size() > 1) {
zkClientConnectTimeout = 24 * 60 * 60 * 1000; // 1 day for embedded ensemble
log.info("Zookeeper client=" + zookeeperHost + " Waiting for a quorum.");
} else {
log.info("Zookeeper client=" + zookeeperHost);
}
String confDir = System.getProperty("bootstrap_confdir");
boolean boostrapConf = Boolean.getBoolean("bootstrap_conf");
if(!ZkController.checkChrootPath(zookeeperHost, (confDir!=null) || boostrapConf || zkRunOnly)) {
throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR,
"A chroot was specified in ZkHost but the znode doesn't exist. " + zookeeperHost);
}
zkController = new ZkController(cc, zookeeperHost, zkClientConnectTimeout, config,
new CurrentCoreDescriptorProvider() {
@Override
public List getCurrentDescriptors() {
List descriptors = new ArrayList<>(
cc.getLoadedCoreNames().size());
Collection cores = cc.getCores();
for (SolrCore core : cores) {
descriptors.add(core.getCoreDescriptor());
}
return descriptors;
}
});
if (zkRun != null && zkServer.getServers().size() > 1 && confDir == null && boostrapConf == false) {
// we are part of an ensemble and we are not uploading the config - pause to give the config time
// to get up
Thread.sleep(10000);
}
if(confDir != null) {
Path configPath = Paths.get(confDir);
if (!Files.isDirectory(configPath))
throw new IllegalArgumentException("bootstrap_confdir must be a directory of configuration files");
String confName = System.getProperty(ZkController.COLLECTION_PARAM_PREFIX+ZkController.CONFIGNAME_PROP, "configuration1");
ZkConfigManager configManager = new ZkConfigManager(zkController.getZkClient());
configManager.uploadConfigDir(configPath, confName);
}
if(boostrapConf) {
ZkController.bootstrapConf(zkController.getZkClient(), cc, solrHome);
}
} catch (InterruptedException e) {
// Restore the interrupted status
Thread.currentThread().interrupt();
log.error("", e);
throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR,
"", e);
} catch (TimeoutException e) {
log.error("Could not connect to ZooKeeper", e);
throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR,
"", e);
} catch (IOException | KeeperException e) {
log.error("", e);
throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR,
"", e);
}
}
this.zkController = zkController;
}
private String stripChroot(String zkRun) {
if (zkRun == null || zkRun.trim().length() == 0 || zkRun.lastIndexOf('/') < 0) return zkRun;
return zkRun.substring(0, zkRun.lastIndexOf('/'));
}
public static volatile Predicate testing_beforeRegisterInZk;
public void registerInZk(final SolrCore core, boolean background, boolean skipRecovery) {
CoreDescriptor cd = core.getCoreDescriptor(); // save this here - the core may not have it later
Runnable r = () -> {
MDCLoggingContext.setCore(core);
try {
try {
if (testing_beforeRegisterInZk != null) {
testing_beforeRegisterInZk.test(cd);
}
if (!core.getCoreContainer().isShutDown()) {
zkController.register(core.getName(), cd, skipRecovery);
}
} catch (InterruptedException e) {
// Restore the interrupted status
Thread.currentThread().interrupt();
SolrException.log(log, "", e);
} catch (KeeperException e) {
SolrException.log(log, "", e);
} catch (AlreadyClosedException e) {
} catch (Exception e) {
try {
zkController.publish(cd, Replica.State.DOWN);
} catch (InterruptedException e1) {
Thread.currentThread().interrupt();
log.error("", e1);
} catch (Exception e1) {
log.error("", e1);
}
SolrException.log(log, "", e);
}
} finally {
MDCLoggingContext.clear();
}
};
if (zkController != null) {
if (background) {
coreZkRegister.execute(r);
} else {
MDCLoggingContext.setCore(core);
try {
r.run();
} finally {
MDCLoggingContext.clear();
}
}
}
}
public ZkController getZkController() {
return zkController;
}
public void close() {
try {
if (zkController != null) {
zkController.close();
}
} finally {
try {
if (zkServer != null) {
zkServer.stop();
}
} finally {
ExecutorUtil.shutdownAndAwaitTermination(coreZkRegister);
}
}
}
public ExecutorService getCoreZkRegisterExecutorService() {
return coreZkRegister;
}
}
