| // 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.io.File; |
| import java.io.IOException; |
| |
| import com.cloud.agent.api.to.DataStoreTO; |
| import com.cloud.agent.api.to.NfsTO; |
| import com.cloud.api.storage.LinstorBackupSnapshotCommand; |
| import com.cloud.hypervisor.kvm.resource.LibvirtComputingResource; |
| import com.cloud.hypervisor.kvm.storage.KVMStoragePool; |
| import com.cloud.hypervisor.kvm.storage.KVMStoragePoolManager; |
| import com.cloud.resource.CommandWrapper; |
| import com.cloud.resource.ResourceWrapper; |
| import com.cloud.storage.Storage; |
| import com.cloud.utils.script.Script; |
| import org.apache.cloudstack.storage.command.CopyCmdAnswer; |
| import org.apache.cloudstack.storage.to.SnapshotObjectTO; |
| import org.apache.cloudstack.utils.qemu.QemuImg; |
| import org.apache.cloudstack.utils.qemu.QemuImgException; |
| import org.apache.cloudstack.utils.qemu.QemuImgFile; |
| import org.apache.commons.io.FileUtils; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.joda.time.Duration; |
| import org.libvirt.LibvirtException; |
| |
| @ResourceWrapper(handles = LinstorBackupSnapshotCommand.class) |
| public final class LinstorBackupSnapshotCommandWrapper |
| extends CommandWrapper<LinstorBackupSnapshotCommand, CopyCmdAnswer, LibvirtComputingResource> |
| { |
| protected static Logger LOGGER = LogManager.getLogger(LinstorBackupSnapshotCommandWrapper.class); |
| |
| private String zfsSnapdev(boolean hide, String zfsUrl) { |
| Script script = new Script("/usr/bin/zfs", Duration.millis(5000)); |
| script.add("set"); |
| script.add("snapdev=" + (hide ? "hidden" : "visible")); |
| script.add(zfsUrl.substring(6)); // cutting zfs:// |
| return script.execute(); |
| } |
| |
| private String qemuShrink(String path, long sizeByte, long timeout) { |
| Script qemuImg = new Script("qemu-img", Duration.millis(timeout)); |
| qemuImg.add("resize"); |
| qemuImg.add("--shrink"); |
| qemuImg.add(path); |
| qemuImg.add("" + sizeByte); |
| return qemuImg.execute(); |
| } |
| |
| static void cleanupSecondaryPool(final KVMStoragePool secondaryPool) { |
| if (secondaryPool != null) { |
| try { |
| secondaryPool.delete(); |
| } catch (final Exception e) { |
| LOGGER.debug("Failed to delete secondary storage", e); |
| } |
| } |
| } |
| |
| private String convertImageToQCow2( |
| final String srcPath, |
| final SnapshotObjectTO dst, |
| final KVMStoragePool secondaryPool, |
| int waitMilliSeconds |
| ) |
| throws LibvirtException, QemuImgException, IOException |
| { |
| final String dstDir = secondaryPool.getLocalPath() + File.separator + dst.getPath(); |
| FileUtils.forceMkdir(new File(dstDir)); |
| |
| final String dstPath = dstDir + File.separator + dst.getName(); |
| final QemuImgFile srcFile = new QemuImgFile(srcPath, QemuImg.PhysicalDiskFormat.RAW); |
| final QemuImgFile dstFile = new QemuImgFile(dstPath, QemuImg.PhysicalDiskFormat.QCOW2); |
| |
| // NOTE: the qemu img will also contain the drbd metadata at the end |
| final QemuImg qemu = new QemuImg(waitMilliSeconds); |
| qemu.convert(srcFile, dstFile); |
| LOGGER.info("Backup snapshot " + srcFile + " to " + dstPath); |
| return dstPath; |
| } |
| |
| private SnapshotObjectTO setCorrectSnapshotSize(final SnapshotObjectTO dst, final String dstPath) { |
| final File snapFile = new File(dstPath); |
| final long size = snapFile.exists() ? snapFile.length() : 0; |
| |
| final SnapshotObjectTO snapshot = new SnapshotObjectTO(); |
| snapshot.setPath(dst.getPath() + File.separator + dst.getName()); |
| snapshot.setPhysicalSize(size); |
| return snapshot; |
| } |
| |
| @Override |
| public CopyCmdAnswer execute(LinstorBackupSnapshotCommand cmd, LibvirtComputingResource serverResource) |
| { |
| LOGGER.debug("LinstorBackupSnapshotCommandWrapper: " + cmd.getSrcTO().getPath() + " -> " + cmd.getDestTO().getPath()); |
| final SnapshotObjectTO src = (SnapshotObjectTO) cmd.getSrcTO(); |
| final SnapshotObjectTO dst = (SnapshotObjectTO) cmd.getDestTO(); |
| KVMStoragePool secondaryPool = null; |
| final KVMStoragePoolManager storagePoolMgr = serverResource.getStoragePoolMgr(); |
| KVMStoragePool linstorPool = storagePoolMgr.getStoragePool(Storage.StoragePoolType.Linstor, src.getDataStore().getUuid()); |
| boolean zfsHidden = false; |
| String srcPath = src.getPath(); |
| |
| if (linstorPool == null) { |
| return new CopyCmdAnswer("Unable to get linstor storage pool from destination volume."); |
| } |
| |
| final DataStoreTO dstDataStore = dst.getDataStore(); |
| if (!(dstDataStore instanceof NfsTO)) { |
| return new CopyCmdAnswer("Backup Linstor snapshot: Only NFS secondary supported at present!"); |
| } |
| |
| try |
| { |
| // provide the linstor snapshot block device |
| // on lvm thin this should already be there in /dev/mapper/vg-snapshotname |
| // on zfs we need to unhide the snapshot block device |
| LOGGER.info("Src: " + srcPath + " | " + src.getName()); |
| if (srcPath.startsWith("zfs://")) { |
| zfsHidden = true; |
| if (zfsSnapdev(false, srcPath) != null) { |
| return new CopyCmdAnswer("Unable to unhide zfs snapshot device."); |
| } |
| srcPath = "/dev/" + srcPath.substring(6); |
| } |
| |
| secondaryPool = storagePoolMgr.getStoragePoolByURI(dstDataStore.getUrl()); |
| |
| String dstPath = convertImageToQCow2(srcPath, dst, secondaryPool, cmd.getWaitInMillSeconds()); |
| |
| // resize to real volume size, cutting of drbd metadata |
| String result = qemuShrink(dstPath, src.getVolume().getSize(), cmd.getWaitInMillSeconds()); |
| if (result != null) { |
| return new CopyCmdAnswer("qemu-img shrink failed: " + result); |
| } |
| LOGGER.info("Backup shrunk " + dstPath + " to actual size " + src.getVolume().getSize()); |
| |
| SnapshotObjectTO snapshot = setCorrectSnapshotSize(dst, dstPath); |
| return new CopyCmdAnswer(snapshot); |
| } catch (final Exception e) { |
| final String error = String.format("Failed to backup snapshot with id [%s] with a pool %s, due to %s", |
| cmd.getSrcTO().getId(), cmd.getSrcTO().getDataStore().getUuid(), e.getMessage()); |
| LOGGER.error(error); |
| return new CopyCmdAnswer(cmd, e); |
| } finally { |
| cleanupSecondaryPool(secondaryPool); |
| if (zfsHidden) { |
| zfsSnapdev(true, src.getPath()); |
| } |
| } |
| } |
| } |