/*
* 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.ambari.server.checks;
import java.util.Arrays;
import org.apache.ambari.server.AmbariException;
import org.apache.ambari.server.controller.PrereqCheckRequest;
import org.apache.ambari.server.state.stack.PrereqCheckStatus;
import org.apache.ambari.server.state.stack.PrerequisiteCheck;
import org.apache.commons.lang.BooleanUtils;
import com.google.inject.Singleton;
/**
* The {@link YarnRMHighAvailabilityCheck} checks that YARN has HA mode enabled
* for ResourceManager..
*/
@Singleton
@UpgradeCheck(group = UpgradeCheckGroup.MULTIPLE_COMPONENT_WARNING, order = 17.2f)
public class YarnRMHighAvailabilityCheck extends AbstractCheckDescriptor {
/**
* Constructor.
*/
public YarnRMHighAvailabilityCheck() {
super(CheckDescription.SERVICES_YARN_RM_HA);
}
/**
* {@inheritDoc}
*/
@Override
public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
return super.isApplicable(request, Arrays.asList("YARN"), true);
}
/**
* {@inheritDoc}
*/
@Override
public void perform(PrerequisiteCheck prerequisiteCheck, PrereqCheckRequest request) throws AmbariException {
// pretty weak sauce here; probably should do a bit more, like query JMX to
// see that there is at least 1 RM active and 1 in standby
String propertyValue = getProperty(request, "yarn-site", "yarn.resourcemanager.ha.enabled");
if (null == propertyValue || !BooleanUtils.toBoolean(propertyValue)) {
prerequisiteCheck.getFailedOn().add("YARN");
prerequisiteCheck.setStatus(PrereqCheckStatus.WARNING);
prerequisiteCheck.setFailReason(getFailReason(prerequisiteCheck, request));
}
}
}