/**
* 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.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.ambari.server.AmbariException;
import org.apache.ambari.server.controller.PrereqCheckRequest;
import org.apache.ambari.server.state.Cluster;
import org.apache.ambari.server.state.Service;
import org.apache.ambari.server.state.ServiceComponent;
import org.apache.ambari.server.state.ServiceComponentHost;
import org.apache.ambari.server.state.UpgradeState;
import org.apache.ambari.server.state.stack.PrereqCheckStatus;
import org.apache.ambari.server.state.stack.PrerequisiteCheck;
import org.apache.ambari.server.state.stack.upgrade.UpgradeType;
import org.apache.commons.lang.StringUtils;
import com.google.inject.Singleton;
/**
* Warns about host components whose upgrade state is VERSION_MISMATCH. Never triggers
* fail. In failure description, lists actual and expected component versions.
*/
@Singleton
@UpgradeCheck(
group = UpgradeCheckGroup.COMPONENT_VERSION,
order = 7.0f,
required = { UpgradeType.ROLLING, UpgradeType.NON_ROLLING, UpgradeType.HOST_ORDERED })
public class VersionMismatchCheck extends AbstractCheckDescriptor {
public VersionMismatchCheck() {
super(CheckDescription.VERSION_MISMATCH);
}
@Override
public void perform(PrerequisiteCheck prerequisiteCheck, PrereqCheckRequest request) throws AmbariException {
final String clusterName = request.getClusterName();
final Cluster cluster = clustersProvider.get().getCluster(clusterName);
Map<String, Service> services = cluster.getServices();
List<String> errorMessages = new ArrayList<>();
for (Service service : services.values()) {
validateService(service, prerequisiteCheck, errorMessages);
}
if (!prerequisiteCheck.getFailedOn().isEmpty()) {
prerequisiteCheck.setStatus(PrereqCheckStatus.WARNING);
String failReason = getFailReason(prerequisiteCheck, request);
prerequisiteCheck.setFailReason(String.format(failReason, StringUtils.join(errorMessages, "\n")));
prerequisiteCheck.setFailReason(StringUtils.join(errorMessages, "\n"));
}
}
/**
* Iterates over all service components belonging to a service and validates them.
* @param service
* @param prerequisiteCheck
* @param errorMessages
* @throws AmbariException
*/
private void validateService(Service service, PrerequisiteCheck prerequisiteCheck,
List<String> errorMessages) throws AmbariException {
Map<String, ServiceComponent> serviceComponents = service.getServiceComponents();
for (ServiceComponent serviceComponent : serviceComponents.values()) {
validateServiceComponent(serviceComponent, prerequisiteCheck, errorMessages);
}
}
/**
* Iterates over all host components belonging to a service component and validates them.
* @param serviceComponent
* @param prerequisiteCheck
* @param errorMessages
*/
private void validateServiceComponent(ServiceComponent serviceComponent,
PrerequisiteCheck prerequisiteCheck, List<String> errorMessages) {
Map<String, ServiceComponentHost> serviceComponentHosts = serviceComponent.getServiceComponentHosts();
for (ServiceComponentHost serviceComponentHost : serviceComponentHosts.values()) {
validateServiceComponentHost(serviceComponent, serviceComponentHost,
prerequisiteCheck, errorMessages);
}
}
/**
* Validates host component. If upgrade state of host component is VERSION_MISMATCH,
* adds hostname to a Failed On map of prerequisite check, and adds all other
* host component version details to errorMessages
* @param serviceComponent
* @param serviceComponentHost
* @param prerequisiteCheck
* @param errorMessages
*/
private void validateServiceComponentHost(ServiceComponent serviceComponent,
ServiceComponentHost serviceComponentHost,
PrerequisiteCheck prerequisiteCheck,
List<String> errorMessages) {
if (serviceComponentHost.getUpgradeState().equals(UpgradeState.VERSION_MISMATCH)) {
String hostName = serviceComponentHost.getHostName();
String serviceComponentName = serviceComponentHost.getServiceComponentName();
String desiredVersion = serviceComponent.getDesiredVersion();
String actualVersion = serviceComponentHost.getVersion();
String message = hostName + "/" + serviceComponentName
+ " desired version: " + desiredVersion
+ ", actual version: " + actualVersion;
prerequisiteCheck.getFailedOn().add(hostName);
errorMessages.add(message);
}
}
}