Examples with RbdException com.ceph.rbd.RbdException used on opensource projects

Example 6 with RbdException

use of com.ceph.rbd.RbdException in project cloudstack by apache.

the class LibvirtBackupSnapshotCommandWrapper method execute.

@Override
public Answer execute(final BackupSnapshotCommand command, final LibvirtComputingResource libvirtComputingResource) {
    final Long dcId = command.getDataCenterId();
    final Long accountId = command.getAccountId();
    final Long volumeId = command.getVolumeId();
    final String secondaryStoragePoolUrl = command.getSecondaryStorageUrl();
    final String snapshotName = command.getSnapshotName();
    String snapshotDestPath = null;
    String snapshotRelPath = null;
    final String vmName = command.getVmName();
    KVMStoragePool secondaryStoragePool = null;
    final KVMStoragePoolManager storagePoolMgr = libvirtComputingResource.getStoragePoolMgr();
    try {
        final LibvirtUtilitiesHelper libvirtUtilitiesHelper = libvirtComputingResource.getLibvirtUtilitiesHelper();
        final Connect conn = libvirtUtilitiesHelper.getConnectionByVmName(vmName);
        secondaryStoragePool = storagePoolMgr.getStoragePoolByURI(secondaryStoragePoolUrl);
        final String ssPmountPath = secondaryStoragePool.getLocalPath();
        snapshotRelPath = File.separator + "snapshots" + File.separator + dcId + File.separator + accountId + File.separator + volumeId;
        snapshotDestPath = ssPmountPath + File.separator + "snapshots" + File.separator + dcId + File.separator + accountId + File.separator + volumeId;
        final KVMStoragePool primaryPool = storagePoolMgr.getStoragePool(command.getPool().getType(), command.getPrimaryStoragePoolNameLabel());
        final KVMPhysicalDisk snapshotDisk = primaryPool.getPhysicalDisk(command.getVolumePath());
        final String manageSnapshotPath = libvirtComputingResource.manageSnapshotPath();
        final int cmdsTimeout = libvirtComputingResource.getCmdsTimeout();
        /**
             * RBD snapshots can't be copied using qemu-img, so we have to use
             * the Java bindings for librbd here.
             *
             * These bindings will read the snapshot and write the contents to
             * the secondary storage directly
             *
             * It will stop doing so if the amount of time spend is longer then
             * cmds.timeout
             */
        if (primaryPool.getType() == StoragePoolType.RBD) {
            try {
                final Rados r = new Rados(primaryPool.getAuthUserName());
                r.confSet("mon_host", primaryPool.getSourceHost() + ":" + primaryPool.getSourcePort());
                r.confSet("key", primaryPool.getAuthSecret());
                r.confSet("client_mount_timeout", "30");
                r.connect();
                s_logger.debug("Succesfully connected to Ceph cluster at " + r.confGet("mon_host"));
                final IoCTX io = r.ioCtxCreate(primaryPool.getSourceDir());
                final Rbd rbd = new Rbd(io);
                final RbdImage image = rbd.open(snapshotDisk.getName(), snapshotName);
                final File fh = new File(snapshotDestPath);
                try (BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(fh))) {
                    final int chunkSize = 4194304;
                    long offset = 0;
                    s_logger.debug("Backuping up RBD snapshot " + snapshotName + " to  " + snapshotDestPath);
                    while (true) {
                        final byte[] buf = new byte[chunkSize];
                        final int bytes = image.read(offset, buf, chunkSize);
                        if (bytes <= 0) {
                            break;
                        }
                        bos.write(buf, 0, bytes);
                        offset += bytes;
                    }
                    s_logger.debug("Completed backing up RBD snapshot " + snapshotName + " to  " + snapshotDestPath + ". Bytes written: " + offset);
                } catch (final IOException ex) {
                    s_logger.error("BackupSnapshotAnswer:Exception:" + ex.getMessage());
                }
                r.ioCtxDestroy(io);
            } catch (final RadosException e) {
                s_logger.error("A RADOS operation failed. The error was: " + e.getMessage());
                return new BackupSnapshotAnswer(command, false, e.toString(), null, true);
            } catch (final RbdException e) {
                s_logger.error("A RBD operation on " + snapshotDisk.getName() + " failed. The error was: " + e.getMessage());
                return new BackupSnapshotAnswer(command, false, e.toString(), null, true);
            }
        } else {
            final Script scriptCommand = new Script(manageSnapshotPath, cmdsTimeout, s_logger);
            scriptCommand.add("-b", snapshotDisk.getPath());
            scriptCommand.add("-n", snapshotName);
            scriptCommand.add("-p", snapshotDestPath);
            scriptCommand.add("-t", snapshotName);
            final String result = scriptCommand.execute();
            if (result != null) {
                s_logger.debug("Failed to backup snaptshot: " + result);
                return new BackupSnapshotAnswer(command, false, result, null, true);
            }
        }
        /* Delete the snapshot on primary */
        DomainState state = null;
        Domain vm = null;
        if (vmName != null) {
            try {
                vm = libvirtComputingResource.getDomain(conn, command.getVmName());
                state = vm.getInfo().state;
            } catch (final LibvirtException e) {
                s_logger.trace("Ignoring libvirt error.", e);
            }
        }
        final KVMStoragePool primaryStorage = storagePoolMgr.getStoragePool(command.getPool().getType(), command.getPool().getUuid());
        if (state == DomainState.VIR_DOMAIN_RUNNING && !primaryStorage.isExternalSnapshot()) {
            final MessageFormat snapshotXML = new MessageFormat("   <domainsnapshot>" + "       <name>{0}</name>" + "          <domain>" + "            <uuid>{1}</uuid>" + "        </domain>" + "    </domainsnapshot>");
            final String vmUuid = vm.getUUIDString();
            final Object[] args = new Object[] { snapshotName, vmUuid };
            final String snapshot = snapshotXML.format(args);
            s_logger.debug(snapshot);
            final DomainSnapshot snap = vm.snapshotLookupByName(snapshotName);
            if (snap != null) {
                snap.delete(0);
            } else {
                throw new CloudRuntimeException("Unable to find vm snapshot with name -" + snapshotName);
            }
            /*
                 * libvirt on RHEL6 doesn't handle resume event emitted from
                 * qemu
                 */
            vm = libvirtComputingResource.getDomain(conn, command.getVmName());
            state = vm.getInfo().state;
            if (state == DomainState.VIR_DOMAIN_PAUSED) {
                vm.resume();
            }
        } else {
            final Script scriptCommand = new Script(manageSnapshotPath, cmdsTimeout, s_logger);
            scriptCommand.add("-d", snapshotDisk.getPath());
            scriptCommand.add("-n", snapshotName);
            final String result = scriptCommand.execute();
            if (result != null) {
                s_logger.debug("Failed to backup snapshot: " + result);
                return new BackupSnapshotAnswer(command, false, "Failed to backup snapshot: " + result, null, true);
            }
        }
    } catch (final LibvirtException e) {
        return new BackupSnapshotAnswer(command, false, e.toString(), null, true);
    } catch (final CloudRuntimeException e) {
        return new BackupSnapshotAnswer(command, false, e.toString(), null, true);
    } finally {
        if (secondaryStoragePool != null) {
            storagePoolMgr.deleteStoragePool(secondaryStoragePool.getType(), secondaryStoragePool.getUuid());
        }
    }
    return new BackupSnapshotAnswer(command, true, null, snapshotRelPath + File.separator + snapshotName, true);
}