| // 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 com.cloud.ha; |
| |
| import java.util.List; |
| |
| import javax.inject.Inject; |
| |
| import org.apache.log4j.Logger; |
| |
| import com.cloud.agent.AgentManager; |
| import com.cloud.agent.api.Answer; |
| import com.cloud.agent.api.CheckOnHostAnswer; |
| import com.cloud.agent.api.CheckOnHostCommand; |
| import com.cloud.host.Host; |
| import com.cloud.host.HostVO; |
| import com.cloud.host.Status; |
| import com.cloud.host.dao.HostDao; |
| import com.cloud.hypervisor.Hypervisor.HypervisorType; |
| import com.cloud.resource.ResourceManager; |
| import com.cloud.utils.component.AdapterBase; |
| import com.cloud.vm.VirtualMachine; |
| |
| public class XenServerInvestigator extends AdapterBase implements Investigator { |
| private final static Logger s_logger = Logger.getLogger(XenServerInvestigator.class); |
| @Inject |
| HostDao _hostDao; |
| @Inject |
| AgentManager _agentMgr; |
| @Inject |
| ResourceManager _resourceMgr; |
| |
| protected XenServerInvestigator() { |
| } |
| |
| @Override |
| public Status isAgentAlive(Host agent) { |
| if (agent.getHypervisorType() != HypervisorType.XenServer) { |
| return null; |
| } |
| |
| CheckOnHostCommand cmd = new CheckOnHostCommand(agent); |
| List<HostVO> neighbors = _resourceMgr.listAllHostsInCluster(agent.getClusterId()); |
| for (HostVO neighbor : neighbors) { |
| if (neighbor.getId() == agent.getId() || neighbor.getHypervisorType() != HypervisorType.XenServer) { |
| continue; |
| } |
| Answer answer = _agentMgr.easySend(neighbor.getId(), cmd); |
| if (answer != null && answer.getResult()) { |
| CheckOnHostAnswer ans = (CheckOnHostAnswer)answer; |
| if (!ans.isDetermined()) { |
| s_logger.debug("Host " + neighbor + " couldn't determine the status of " + agent); |
| continue; |
| } |
| // even it returns true, that means host is up, but XAPI may not work |
| return ans.isAlive() ? null : Status.Down; |
| } |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public boolean isVmAlive(VirtualMachine vm, Host host) throws UnknownVM { |
| Status status = isAgentAlive(host); |
| if (status == null) { |
| throw new UnknownVM(); |
| } |
| if (status == Status.Up) { |
| return true; |
| } else { |
| throw new UnknownVM(); |
| } |
| } |
| } |