String secondaryStoragePoolUrl = cmd.getSecondaryStorageUrl();
String snapshotName = cmd.getSnapshotName();
String snapshotDestPath = null;
String snapshotRelPath = null;
String vmName = cmd.getVmName();
KVMStoragePool secondaryStoragePool = null;
try {
Connect conn = LibvirtConnection.getConnectionByVmName(vmName);
secondaryStoragePool = _storagePoolMgr.getStoragePoolByURI(
secondaryStoragePoolUrl);
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;
KVMStoragePool primaryPool = _storagePoolMgr.getStoragePool(
cmd.getPool().getType(),
cmd.getPrimaryStoragePoolNameLabel());
KVMPhysicalDisk snapshotDisk = primaryPool.getPhysicalDisk(cmd
.getVolumePath());
/**
* 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 {
Rados r = new Rados(primaryPool.getAuthUserName());
r.confSet("mon_host", primaryPool.getSourceHost() + ":" + primaryPool.getSourcePort());
r.confSet("key", primaryPool.getAuthSecret());
r.connect();
s_logger.debug("Succesfully connected to Ceph cluster at " + r.confGet("mon_host"));
IoCTX io = r.ioCtxCreate(primaryPool.getSourceDir());
Rbd rbd = new Rbd(io);
RbdImage image = rbd.open(snapshotDisk.getName(), snapshotName);
File fh = new File(snapshotDestPath);
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(fh));
int chunkSize = 4194304;
long offset = 0;
s_logger.debug("Backuping up RBD snapshot " + snapshotName + " to " + snapshotDestPath);
while(true) {
byte[] buf = new byte[chunkSize];
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);
bos.close();
r.ioCtxDestroy(io);
} catch (RadosException e) {
s_logger.error("A RADOS operation failed. The error was: " + e.getMessage());
return new BackupSnapshotAnswer(cmd, false, e.toString(), null, true);
} catch (RbdException e) {
s_logger.error("A RBD operation on " + snapshotDisk.getName() + " failed. The error was: " + e.getMessage());
return new BackupSnapshotAnswer(cmd, false, e.toString(), null, true);
} catch (FileNotFoundException e) {
s_logger.error("Failed to open " + snapshotDestPath + ". The error was: " + e.getMessage());
return new BackupSnapshotAnswer(cmd, false, e.toString(), null, true);
} catch (IOException e) {
s_logger.debug("An I/O error occured during a snapshot operation on " + snapshotDestPath);
return new BackupSnapshotAnswer(cmd, false, e.toString(), null, true);
}
} else {
Script command = new Script(_manageSnapshotPath, _cmdsTimeout,
s_logger);
command.add("-b", snapshotDisk.getPath());
command.add("-n", snapshotName);
command.add("-p", snapshotDestPath);
command.add("-t", snapshotName);
String result = command.execute();
if (result != null) {
s_logger.debug("Failed to backup snaptshot: " + result);
return new BackupSnapshotAnswer(cmd, false, result, null, true);
}
}
/* Delete the snapshot on primary */
DomainInfo.DomainState state = null;
Domain vm = null;
if (vmName != null) {
try {
vm = getDomain(conn, cmd.getVmName());
state = vm.getInfo().state;
} catch (LibvirtException e) {
s_logger.trace("Ignoring libvirt error.", e);
}
}
KVMStoragePool primaryStorage = _storagePoolMgr.getStoragePool(
cmd.getPool().getType(),
cmd.getPool().getUuid());
if (state == DomainInfo.DomainState.VIR_DOMAIN_RUNNING
&& !primaryStorage.isExternalSnapshot()) {
String vmUuid = vm.getUUIDString();
Object[] args = new Object[] { snapshotName, vmUuid };
String snapshot = SnapshotXML.format(args);
s_logger.debug(snapshot);
DomainSnapshot snap = vm.snapshotLookupByName(snapshotName);