// 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.ejb.Local;
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;
@Local(value = Investigator.class)
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;
}
return ans.isAlive() ? Status.Up : Status.Down;
}
}
return null;
}
@Override
public Boolean isVmAlive(VirtualMachine vm, Host host) {
Status status = isAgentAlive(host);
if (status == null) {
return null;
}
return status == Status.Up ? true : null;
}
}