| /** |
| * 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.serveraction.upgrades; |
| |
| import java.util.Collection; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeSet; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.stream.Collectors; |
| |
| import org.apache.ambari.server.AmbariException; |
| import org.apache.ambari.server.ServiceComponentNotFoundException; |
| import org.apache.ambari.server.ServiceNotFoundException; |
| import org.apache.ambari.server.actionmanager.HostRoleStatus; |
| import org.apache.ambari.server.agent.CommandReport; |
| import org.apache.ambari.server.events.listeners.upgrade.StackVersionListener; |
| import org.apache.ambari.server.stack.MasterHostResolver; |
| import org.apache.ambari.server.state.Cluster; |
| import org.apache.ambari.server.state.Host; |
| 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.State; |
| import org.apache.ambari.server.state.UpgradeContext; |
| import org.apache.ambari.server.state.stack.upgrade.AddComponentTask; |
| |
| import com.google.gson.Gson; |
| |
| /** |
| * The {@link AddComponentAction} is used to add a component during an upgrade. |
| */ |
| public class AddComponentAction extends AbstractUpgradeServerAction { |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public CommandReport execute(ConcurrentMap<String, Object> requestSharedDataContext) |
| throws AmbariException, InterruptedException { |
| |
| Map<String, String> commandParameters = getCommandParameters(); |
| if (null == commandParameters || commandParameters.isEmpty()) { |
| return createCommandReport(0, HostRoleStatus.FAILED, "{}", "", |
| "Unable to add a new component to the cluster as there is no information on what to add."); |
| } |
| |
| String clusterName = commandParameters.get("clusterName"); |
| Cluster cluster = getClusters().getCluster(clusterName); |
| UpgradeContext upgradeContext = getUpgradeContext(cluster); |
| |
| // guard against downgrade until there is such a thing as removal of a |
| // component on downgrade |
| if (upgradeContext.isDowngradeAllowed() || upgradeContext.isPatchRevert()) { |
| return createCommandReport(0, HostRoleStatus.SKIPPED_FAILED, "{}", "", |
| "Unable to add a component during an upgrade which can be downgraded."); |
| } |
| |
| String serializedJson = commandParameters.get( |
| AddComponentTask.PARAMETER_SERIALIZED_ADD_COMPONENT_TASK); |
| |
| Gson gson = getGson(); |
| AddComponentTask task = gson.fromJson(serializedJson, AddComponentTask.class); |
| |
| final Service service; |
| try { |
| service = cluster.getService(task.service); |
| } catch (ServiceNotFoundException snfe) { |
| return createCommandReport(0, HostRoleStatus.COMPLETED, "{}", "", |
| String.format( |
| "%s was not installed in this cluster since %s is not an installed service.", |
| task.component, task.service)); |
| } |
| |
| |
| // build the list of candidate hosts |
| Collection<Host> candidates = MasterHostResolver.getCandidateHosts(cluster, task.hosts, |
| task.hostService, task.hostComponent); |
| |
| if (candidates.isEmpty()) { |
| return createCommandReport(0, HostRoleStatus.FAILED, "{}", "", String.format( |
| "Unable to add a new component to the cluster as there are no hosts which contain %s's %s", |
| task.hostService, task.hostComponent)); |
| } |
| |
| // create the component if it doesn't exist in the service yet |
| ServiceComponent serviceComponent; |
| try { |
| serviceComponent = service.getServiceComponent(task.component); |
| } catch (ServiceComponentNotFoundException scnfe) { |
| serviceComponent = service.addServiceComponent(task.component); |
| serviceComponent.setDesiredState(State.INSTALLED); |
| } |
| |
| StringBuilder buffer = new StringBuilder(String.format( |
| "Successfully added %s's %s to the cluster", task.service, task.component)).append( |
| System.lineSeparator()); |
| |
| Map<String, ServiceComponentHost> existingSCHs = serviceComponent.getServiceComponentHosts(); |
| |
| for (Host host : candidates) { |
| if (existingSCHs.containsKey(host.getHostName())) { |
| buffer.append(" ") |
| .append(host.getHostName()) |
| .append(": ") |
| .append("Already Installed") |
| .append(System.lineSeparator()); |
| |
| continue; |
| } |
| |
| ServiceComponentHost sch = serviceComponent.addServiceComponentHost(host.getHostName()); |
| sch.setDesiredState(State.INSTALLED); |
| sch.setState(State.INSTALLED); |
| |
| // for now, this is the easiest way to fire a topology event which |
| // refreshes the information about the cluster (needed for restart |
| // commands) |
| sch.setVersion(StackVersionListener.UNKNOWN_VERSION); |
| |
| buffer.append(" ") |
| .append(host.getHostName()) |
| .append(": ") |
| .append("Installed") |
| .append(System.lineSeparator()); |
| } |
| |
| Set<String> sortedHosts = candidates.stream().map(host -> host.getHostName()).collect( |
| Collectors.toCollection(() -> new TreeSet<>())); |
| |
| Map<String, Object> structureOutMap = new LinkedHashMap<>(); |
| structureOutMap.put("service", task.service); |
| structureOutMap.put("component", task.component); |
| structureOutMap.put("hosts", sortedHosts); |
| |
| return createCommandReport(0, HostRoleStatus.COMPLETED, gson.toJson(structureOutMap), |
| buffer.toString(), ""); |
| } |
| } |