public VolumeInfo createVolumeFromSnapshot(Volume volume, Snapshot snapshot, UserVm vm)
throws StorageUnavailableException {
Account account = _entityMgr.findById(Account.class, volume.getAccountId());
final HashSet<StoragePool> poolsToAvoid = new HashSet<StoragePool>();
StoragePool pool = null;
Set<Long> podsToAvoid = new HashSet<Long>();
Pair<Pod, Long> pod = null;
DiskOffering diskOffering = _entityMgr.findById(DiskOffering.class, volume.getDiskOfferingId());
DataCenter dc = _entityMgr.findById(DataCenter.class, volume.getDataCenterId());
DiskProfile dskCh = new DiskProfile(volume, diskOffering, snapshot.getHypervisorType());
String msg = "There are no available storage pools to store the volume in";
if(vm != null){
Pod podofVM = _entityMgr.findById(Pod.class, vm.getPodIdToDeployIn());
if(podofVM != null){
pod = new Pair<Pod, Long>(podofVM, podofVM.getId());
}
}
if(vm != null && pod != null){
//if VM is running use the hostId to find the clusterID. If it is stopped, refer the cluster where the ROOT volume of the VM exists.
Long hostId = null;
Long clusterId = null;
if(vm.getState() == State.Running){
hostId = vm.getHostId();
if(hostId != null){
Host vmHost = _entityMgr.findById(Host.class, hostId);
clusterId = vmHost.getClusterId();
}
}else{
List<VolumeVO> rootVolumesOfVm = _volsDao.findByInstanceAndType(vm.getId(), Volume.Type.ROOT);
if (rootVolumesOfVm.size() != 1) {
throw new CloudRuntimeException("The VM " + vm.getHostName() + " has more than one ROOT volume and is in an invalid state. Please contact Cloud Support.");
} else {
VolumeVO rootVolumeOfVm = rootVolumesOfVm.get(0);
StoragePoolVO rootDiskPool = _storagePoolDao.findById(rootVolumeOfVm.getPoolId());
clusterId = (rootDiskPool == null ? null : rootDiskPool.getClusterId());
}
}
// Determine what storage pool to store the volume in
while ((pool = findStoragePool(dskCh, dc, pod.first(), clusterId, hostId, vm, poolsToAvoid)) != null) {
break;
}
if (pool == null) {
//pool could not be found in the VM's pod/cluster.
if(s_logger.isDebugEnabled()){
s_logger.debug("Could not find any storage pool to create Volume in the pod/cluster of the provided VM "+vm.getUuid());
}
StringBuilder addDetails = new StringBuilder(msg);
addDetails.append(", Could not find any storage pool to create Volume in the pod/cluster of the VM ");
addDetails.append(vm.getUuid());
msg = addDetails.toString();
}
}else{
// Determine what pod to store the volume in
while ((pod = findPod(null, null, dc, account.getId(), podsToAvoid)) != null) {
podsToAvoid.add(pod.first().getId());
// Determine what storage pool to store the volume in
while ((pool = findStoragePool(dskCh, dc, pod.first(), null, null, null, poolsToAvoid)) != null) {
break;
}
if (pool != null) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Found a suitable pool for create volume: " + pool.getId());
}
break;
}
}
}
if (pool == null) {
s_logger.info(msg);
throw new StorageUnavailableException(msg, -1);
}
VolumeInfo vol = volFactory.getVolume(volume.getId());
DataStore store = dataStoreMgr.getDataStore(pool.getId(), DataStoreRole.Primary);
SnapshotInfo snapInfo = snapshotFactory.getSnapshot(snapshot.getId(), DataStoreRole.Image);
// sync snapshot to region store if necessary
DataStore snapStore = snapInfo.getDataStore();
long snapVolId = snapInfo.getVolumeId();
try {