linstor: Use template's uuid if pool's downloadPath is null as resource-name

Author: ghernadi

plugins/storage/volume/linstor/src/main/java/com/cloud/hypervisor/kvm/storage/LinstorStorageAdaptor.java

@@ -619,7 +619,7 @@ private static boolean isSystemTemplate(KVMPhysicalDisk disk) {
             try {
                 templateProps.load(new FileInputStream(propFile.toFile()));
                 String desc = templateProps.getProperty("description");
-                if (desc.startsWith("SystemVM Template")) {
+                if (desc != null && desc.startsWith("SystemVM Template")) {
                     return true;
                 }
             } catch (IOException e) {

plugins/storage/volume/linstor/src/main/java/org/apache/cloudstack/storage/datastore/driver/LinstorPrimaryDataStoreDriverImpl.java

@@ -74,12 +74,14 @@
 import com.cloud.storage.StoragePool;
 import com.cloud.storage.VMTemplateStoragePoolVO;
 import com.cloud.storage.VMTemplateStorageResourceAssoc;
+import com.cloud.storage.VMTemplateVO;
 import com.cloud.storage.Volume;
 import com.cloud.storage.VolumeDetailVO;
 import com.cloud.storage.VolumeVO;
 import com.cloud.storage.dao.SnapshotDao;
 import com.cloud.storage.dao.SnapshotDetailsDao;
 import com.cloud.storage.dao.SnapshotDetailsVO;
+import com.cloud.storage.dao.VMTemplateDao;
 import com.cloud.storage.dao.VMTemplatePoolDao;
 import com.cloud.storage.dao.VolumeDao;
 import com.cloud.storage.dao.VolumeDetailsDao;
@@ -131,6 +133,7 @@ public class LinstorPrimaryDataStoreDriverImpl implements PrimaryDataStoreDriver
     ConfigurationDao _configDao;
     @Inject
     private HostDao _hostDao;
+    @Inject private VMTemplateDao _vmTemplateDao;
 
     private long volumeStatsLastUpdate = 0L;
     private final Map<String, Pair<Long, Long>> volumeStats = new HashMap<>();
@@ -668,8 +671,15 @@ private String cloneResource(long csCloneId, VolumeInfo volumeInfo, StoragePoolV
             storagePoolVO.getId(), csCloneId, null);
 
         if (tmplPoolRef != null) {
-            final String templateRscName = LinstorUtil.RSC_PREFIX + tmplPoolRef.getLocalDownloadPath();
+            final String templateRscName;
+            if (tmplPoolRef.getLocalDownloadPath() == null) {
+                VMTemplateVO vmTemplateVO = _vmTemplateDao.findById(tmplPoolRef.getTemplateId());
+                templateRscName = LinstorUtil.RSC_PREFIX + vmTemplateVO.getUuid();
+            }else {
+                templateRscName = LinstorUtil.RSC_PREFIX + tmplPoolRef.getLocalDownloadPath();
+            }
             final String rscName = LinstorUtil.RSC_PREFIX + volumeInfo.getUuid();
+
             final DevelopersApi linstorApi = LinstorUtil.getLinstorAPI(storagePoolVO.getHostAddress());
 
             try {