| // |
| // 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.hypervisor.kvm.resource.wrapper; |
| |
| import java.util.List; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| |
| import org.apache.log4j.Logger; |
| |
| import com.cloud.agent.api.Answer; |
| import com.cloud.agent.api.FenceAnswer; |
| import com.cloud.agent.api.FenceCommand; |
| import com.cloud.hypervisor.kvm.resource.KVMHABase.NfsStoragePool; |
| import com.cloud.hypervisor.kvm.resource.KVMHAChecker; |
| import com.cloud.hypervisor.kvm.resource.KVMHAMonitor; |
| import com.cloud.hypervisor.kvm.resource.LibvirtComputingResource; |
| import com.cloud.resource.CommandWrapper; |
| import com.cloud.resource.ResourceWrapper; |
| |
| @ResourceWrapper(handles = FenceCommand.class) |
| public final class LibvirtFenceCommandWrapper extends CommandWrapper<FenceCommand, Answer, LibvirtComputingResource> { |
| |
| private static final Logger s_logger = Logger.getLogger(LibvirtFenceCommandWrapper.class); |
| |
| @Override |
| public Answer execute(final FenceCommand command, final LibvirtComputingResource libvirtComputingResource) { |
| final ExecutorService executors = Executors.newSingleThreadExecutor(); |
| final KVMHAMonitor monitor = libvirtComputingResource.getMonitor(); |
| |
| final List<NfsStoragePool> pools = monitor.getStoragePools(); |
| |
| /** |
| * We can only safely fence off hosts when we use NFS |
| * On NFS primary storage pools hosts continuesly write |
| * a heartbeat. Disable Fencing Off for hosts without NFS |
| */ |
| if (pools.size() == 0) { |
| String logline = "No NFS storage pools found. No way to safely fence " + command.getVmName() + " on host " + command.getHostGuid(); |
| s_logger.warn(logline); |
| return new FenceAnswer(command, false, logline); |
| } |
| |
| final KVMHAChecker ha = new KVMHAChecker(pools, command.getHostIp()); |
| |
| final Future<Boolean> future = executors.submit(ha); |
| try { |
| final Boolean result = future.get(); |
| if (result) { |
| return new FenceAnswer(command, false, "Heart is still beating..."); |
| } else { |
| return new FenceAnswer(command); |
| } |
| } catch (final InterruptedException e) { |
| s_logger.warn("Unable to fence", e); |
| return new FenceAnswer(command, false, e.getMessage()); |
| } catch (final ExecutionException e) { |
| s_logger.warn("Unable to fence", e); |
| return new FenceAnswer(command, false, e.getMessage()); |
| } |
| } |
| } |