/**
* 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.hadoop.yarn.server.resourcemanager;
import java.io.IOException;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.HostsFileReader;
import org.apache.hadoop.yarn.YarnException;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.service.AbstractService;
public class NodesListManager extends AbstractService{
private static final Log LOG = LogFactory.getLog(NodesListManager.class);
private HostsFileReader hostsReader;
private Configuration conf;
public NodesListManager() {
super(NodesListManager.class.getName());
}
@Override
public void init(Configuration conf) {
this.conf = conf;
// Read the hosts/exclude files to restrict access to the RM
try {
this.hostsReader =
new HostsFileReader(
conf.get(YarnConfiguration.RM_NODES_INCLUDE_FILE_PATH,
YarnConfiguration.DEFAULT_RM_NODES_INCLUDE_FILE_PATH),
conf.get(YarnConfiguration.RM_NODES_EXCLUDE_FILE_PATH,
YarnConfiguration.DEFAULT_RM_NODES_EXCLUDE_FILE_PATH)
);
printConfiguredHosts();
} catch (IOException ioe) {
LOG.warn("Failed to init hostsReader, disabling", ioe);
try {
this.hostsReader =
new HostsFileReader(YarnConfiguration.DEFAULT_RM_NODES_INCLUDE_FILE_PATH,
YarnConfiguration.DEFAULT_RM_NODES_EXCLUDE_FILE_PATH);
} catch (IOException ioe2) {
// Should *never* happen
this.hostsReader = null;
throw new YarnException(ioe2);
}
}
super.init(conf);
}
private void printConfiguredHosts() {
if (!LOG.isDebugEnabled()) {
return;
}
LOG.debug("hostsReader: in=" + conf.get(YarnConfiguration.RM_NODES_INCLUDE_FILE_PATH,
YarnConfiguration.DEFAULT_RM_NODES_INCLUDE_FILE_PATH) + " out=" +
conf.get(YarnConfiguration.RM_NODES_EXCLUDE_FILE_PATH,
YarnConfiguration.DEFAULT_RM_NODES_EXCLUDE_FILE_PATH));
for (String include : hostsReader.getHosts()) {
LOG.debug("include: " + include);
}
for (String exclude : hostsReader.getExcludedHosts()) {
LOG.debug("exclude: " + exclude);
}
}
public void refreshNodes() throws IOException {
synchronized (hostsReader) {
hostsReader.refresh();
printConfiguredHosts();
}
}
public boolean isValidNode(String hostName) {
synchronized (hostsReader) {
Set<String> hostsList = hostsReader.getHosts();
Set<String> excludeList = hostsReader.getExcludedHosts();
return ((hostsList.isEmpty() || hostsList.contains(hostName)) &&
!excludeList.contains(hostName));
}
}
}