| /* |
| * 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.cloudstack.engine.subsystem.api.storage.DataStoreDriver; |
| import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreProvider; |
| import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreProviderManager; |
| import org.apache.cloudstack.engine.subsystem.api.storage.PrimaryDataStoreDriver; |
| import org.apache.cloudstack.ha.HAManager; |
| import org.apache.cloudstack.storage.datastore.db.PrimaryDataStoreDao; |
| import org.apache.cloudstack.storage.datastore.db.StoragePoolVO; |
| import org.apache.log4j.Logger; |
| |
| import javax.inject.Inject; |
| import java.util.List; |
| |
| public class KVMInvestigator extends AdapterBase implements Investigator { |
| private final static Logger s_logger = Logger.getLogger(KVMInvestigator.class); |
| @Inject |
| private HostDao _hostDao; |
| @Inject |
| private AgentManager _agentMgr; |
| @Inject |
| private ResourceManager _resourceMgr; |
| @Inject |
| private PrimaryDataStoreDao _storagePoolDao; |
| @Inject |
| private HAManager haManager; |
| @Inject |
| private DataStoreProviderManager dataStoreProviderMgr; |
| |
| @Override |
| public boolean isVmAlive(com.cloud.vm.VirtualMachine vm, Host host) throws UnknownVM { |
| if (haManager.isHAEligible(host)) { |
| return haManager.isVMAliveOnHost(host); |
| } |
| Status status = isAgentAlive(host); |
| s_logger.debug("HA: HOST is ineligible legacy state " + status + " for host " + host.getId()); |
| if (status == null) { |
| throw new UnknownVM(); |
| } |
| if (status == Status.Up) { |
| return true; |
| } else { |
| throw new UnknownVM(); |
| } |
| } |
| |
| @Override |
| public Status isAgentAlive(Host agent) { |
| if (agent.getHypervisorType() != Hypervisor.HypervisorType.KVM && agent.getHypervisorType() != Hypervisor.HypervisorType.LXC) { |
| return null; |
| } |
| |
| if (haManager.isHAEligible(agent)) { |
| return haManager.getHostStatus(agent); |
| } |
| |
| List<StoragePoolVO> clusterPools = _storagePoolDao.listPoolsByCluster(agent.getClusterId()); |
| boolean storageSupportHA = storageSupportHa(clusterPools); |
| if (!storageSupportHA) { |
| List<StoragePoolVO> zonePools = _storagePoolDao.findZoneWideStoragePoolsByHypervisor(agent.getDataCenterId(), agent.getHypervisorType()); |
| storageSupportHA = storageSupportHa(zonePools); |
| } |
| if (!storageSupportHA) { |
| s_logger.warn( |
| "Agent investigation was requested on host " + agent + ", but host does not support investigation because it has no NFS storage. Skipping investigation."); |
| return Status.Disconnected; |
| } |
| |
| Status hostStatus = null; |
| Status neighbourStatus = null; |
| boolean reportFailureIfOneStorageIsDown = HighAvailabilityManager.KvmHAFenceHostIfHeartbeatFailsOnStorage.value(); |
| CheckOnHostCommand cmd = new CheckOnHostCommand(agent, reportFailureIfOneStorageIsDown); |
| |
| try { |
| Answer answer = _agentMgr.easySend(agent.getId(), cmd); |
| if (answer != null) { |
| hostStatus = answer.getResult() ? Status.Down : Status.Up; |
| } |
| } catch (Exception e) { |
| s_logger.debug("Failed to send command to host: " + agent.getId()); |
| } |
| if (hostStatus == null) { |
| hostStatus = Status.Disconnected; |
| } |
| |
| List<HostVO> neighbors = _resourceMgr.listHostsInClusterByStatus(agent.getClusterId(), Status.Up); |
| for (HostVO neighbor : neighbors) { |
| if (neighbor.getId() == agent.getId() |
| || (neighbor.getHypervisorType() != Hypervisor.HypervisorType.KVM && neighbor.getHypervisorType() != Hypervisor.HypervisorType.LXC)) { |
| continue; |
| } |
| s_logger.debug("Investigating host:" + agent.getId() + " via neighbouring host:" + neighbor.getId()); |
| try { |
| Answer answer = _agentMgr.easySend(neighbor.getId(), cmd); |
| if (answer != null) { |
| neighbourStatus = answer.getResult() ? Status.Down : Status.Up; |
| s_logger.debug("Neighbouring host:" + neighbor.getId() + " returned status:" + neighbourStatus + " for the investigated host:" + agent.getId()); |
| if (neighbourStatus == Status.Up) { |
| break; |
| } |
| } |
| } catch (Exception e) { |
| s_logger.debug("Failed to send command to host: " + neighbor.getId()); |
| } |
| } |
| if (neighbourStatus == Status.Up && (hostStatus == Status.Disconnected || hostStatus == Status.Down)) { |
| hostStatus = Status.Disconnected; |
| } |
| if (neighbourStatus == Status.Down && (hostStatus == Status.Disconnected || hostStatus == Status.Down)) { |
| hostStatus = Status.Down; |
| } |
| s_logger.debug("HA: HOST is ineligible legacy state " + hostStatus + " for host " + agent.getId()); |
| return hostStatus; |
| } |
| |
| private boolean storageSupportHa(List<StoragePoolVO> pools) { |
| boolean storageSupportHA = false; |
| for (StoragePoolVO pool : pools) { |
| DataStoreProvider storeProvider = dataStoreProviderMgr.getDataStoreProvider(pool.getStorageProviderName()); |
| DataStoreDriver storeDriver = storeProvider.getDataStoreDriver(); |
| if (storeDriver instanceof PrimaryDataStoreDriver) { |
| PrimaryDataStoreDriver primaryStoreDriver = (PrimaryDataStoreDriver)storeDriver; |
| if (primaryStoreDriver.isStorageSupportHA(pool.getPoolType())) { |
| storageSupportHA = true; |
| break; |
| } |
| } |
| } |
| return storageSupportHA; |
| } |
| } |