// Licensed to the Apache Software Foundation (ASF) under one
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// 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.ArrayList;
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.PingTestCommand;
import com.cloud.host.Host;
import com.cloud.host.Status;
import com.cloud.hypervisor.Hypervisor.HypervisorType;
import com.cloud.network.NetworkModel;
import com.cloud.network.Networks.TrafficType;
import com.cloud.network.router.VirtualRouter;
import com.cloud.network.router.VpcVirtualNetworkApplianceManager;
import com.cloud.vm.Nic;
import com.cloud.vm.UserVmVO;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.dao.UserVmDao;
public class UserVmDomRInvestigator extends AbstractInvestigatorImpl {
private static final Logger s_logger = Logger.getLogger(UserVmDomRInvestigator.class);
@Inject
private final UserVmDao _userVmDao = null;
@Inject
private final AgentManager _agentMgr = null;
@Inject
private final NetworkModel _networkMgr = null;
@Inject
private final VpcVirtualNetworkApplianceManager _vnaMgr = null;
@Override
public boolean isVmAlive(VirtualMachine vm, Host host) throws UnknownVM {
if (vm.getType() != VirtualMachine.Type.User) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Not a User Vm, unable to determine state of " + vm + " returning null");
}
throw new UnknownVM();
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("testing if " + vm + " is alive");
}
// to verify that the VM is alive, we ask the domR (router) to ping the VM (private IP)
UserVmVO userVm = _userVmDao.findById(vm.getId());
List<? extends Nic> nics = _networkMgr.getNicsForTraffic(userVm.getId(), TrafficType.Guest);
for (Nic nic : nics) {
if (nic.getIPv4Address() == null) {
continue;
}
List<VirtualRouter> routers = _vnaMgr.getRoutersForNetwork(nic.getNetworkId());
if (routers == null || routers.isEmpty()) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Unable to find a router in network " + nic.getNetworkId() + " to ping " + vm);
}
continue;
}
Boolean result = null;
for (VirtualRouter router : routers) {
result = testUserVM(vm, nic, router);
if (result != null) {
break;
}
}
if (result == null) {
continue;
}
return result;
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("Returning null since we're unable to determine state of " + vm);
}
throw new UnknownVM();
}
@Override
public Status isAgentAlive(Host agent) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("checking if agent (" + agent.getId() + ") is alive");
}
if (agent.getPodId() == null) {
return null;
}
List<Long> otherHosts = findHostByPod(agent.getPodId(), agent.getId());
for (Long hostId : otherHosts) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("sending ping from (" + hostId + ") to agent's host ip address (" + agent.getPrivateIpAddress() + ")");
}
Status hostState = testIpAddress(hostId, agent.getPrivateIpAddress());
assert hostState != null;
// In case of Status.Unknown, next host will be tried
if (hostState == Status.Up) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("ping from (" + hostId + ") to agent's host ip address (" + agent.getPrivateIpAddress() +
") successful, returning that agent is disconnected");
}
return Status.Disconnected; // the computing host ip is ping-able, but the computing agent is down, report that the agent is disconnected
} else if (hostState == Status.Down) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("returning host state: " + hostState);
}
return Status.Down;
}
}
// could not reach agent, could not reach agent's host, unclear what the problem is but it'll require more investigation...
if (s_logger.isDebugEnabled()) {
s_logger.debug("could not reach agent, could not reach agent's host, returning that we don't have enough information");
}
return null;
}
@Override
public boolean start() {
return true;
}
@Override
public boolean stop() {
return true;
}
private Boolean testUserVM(VirtualMachine vm, Nic nic, VirtualRouter router) {
String privateIp = nic.getIPv4Address();
String routerPrivateIp = router.getPrivateIpAddress();
List<Long> otherHosts = new ArrayList<Long>();
if (vm.getHypervisorType() == HypervisorType.XenServer || vm.getHypervisorType() == HypervisorType.KVM) {
otherHosts.add(router.getHostId());
} else {
otherHosts = findHostByPod(router.getPodIdToDeployIn(), null);
}
for (Long hostId : otherHosts) {
try {
Answer pingTestAnswer = _agentMgr.easySend(hostId, new PingTestCommand(routerPrivateIp, privateIp));
if (pingTestAnswer != null && pingTestAnswer.getResult()) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("user vm's " + vm.getHostName() + " ip address " + privateIp + " has been successfully pinged from the Virtual Router " +
router.getHostName() + ", returning that vm is alive");
}
return Boolean.TRUE;
}
} catch (Exception e) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Couldn't reach due to", e);
}
continue;
}
}
if (s_logger.isDebugEnabled()) {
s_logger.debug(vm + " could not be pinged, returning that it is unknown");
}
return null;
}
}