/*
* 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 com.cloud.agent.AgentManager;
import com.cloud.agent.api.Answer;
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;
import com.cloud.resource.ResourceManager;
import com.cloud.utils.component.AdapterBase;
import org.apache.log4j.Logger;
import javax.ejb.Local;
import javax.inject.Inject;
import java.util.List;
@Local(value=Investigator.class)
public class KVMInvestigator extends AdapterBase implements Investigator {
private final static Logger s_logger = Logger.getLogger(KVMInvestigator.class);
@Inject
HostDao _hostDao;
@Inject
AgentManager _agentMgr;
@Inject
ResourceManager _resourceMgr;
@Override
public Boolean isVmAlive(com.cloud.vm.VirtualMachine vm, Host host) {
Status status = isAgentAlive(host);
if (status == null) {
return null;
}
return status == Status.Up ? true : null;
}
@Override
public Status isAgentAlive(Host agent) {
if (agent.getHypervisorType() != Hypervisor.HypervisorType.KVM) {
return null;
}
CheckOnHostCommand cmd = new CheckOnHostCommand(agent);
List<HostVO> neighbors = _resourceMgr.listHostsInClusterByStatus(agent.getClusterId(), Status.Up);
for (HostVO neighbor : neighbors) {
if (neighbor.getId() == agent.getId() || neighbor.getHypervisorType() != Hypervisor.HypervisorType.KVM) {
continue;
}
try {
Answer answer = _agentMgr.easySend(neighbor.getId(), cmd);
if (answer != null) {
return answer.getResult() ? Status.Down : Status.Up;
}
} catch (Exception e) {
s_logger.debug("Failed to send command to host: " + neighbor.getId());
}
}
return null;
}
}