harikrishna-patnala commented on a change in pull request #4758:
URL: https://github.com/apache/cloudstack/pull/4758#discussion_r611354479



##########
File path: 
plugins/hypervisors/vmware/src/main/java/org/apache/cloudstack/storage/motion/VmwareStorageMotionStrategy.java
##########
@@ -138,11 +144,83 @@ private boolean isOnVmware(DataObject srcData, DataObject 
destData) {
                 && 
HypervisorType.VMware.equals(destData.getTO().getHypervisorType());
     }
 
-    private Pair<Long, String> 
getHostIdForVmAndHostGuidInTargetCluster(DataObject srcData, DataObject 
destData) {
-        StoragePool sourcePool = (StoragePool) srcData.getDataStore();
-        ScopeType sourceScopeType = 
srcData.getDataStore().getScope().getScopeType();
-        StoragePool targetPool = (StoragePool) destData.getDataStore();
-        ScopeType targetScopeType = 
destData.getDataStore().getScope().getScopeType();
+    private Pair<Long, Long> findClusterAndHostIdForVm(VirtualMachine vm) {
+        Long hostId = vm.getHostId();
+        Long clusterId = null;
+        // OfflineVmwareMigration: probably this is null when vm is stopped
+        if(hostId == null) {
+            hostId = vm.getLastHostId();
+            if (s_logger.isDebugEnabled()) {
+                s_logger.debug(String.format("host id is null, using last host 
id %d", hostId) );
+            }
+        }
+        if (hostId == null) {
+            List<VolumeVO> volumes = volDao.findByInstanceAndType(vm.getId(), 
Volume.Type.ROOT);
+            if (CollectionUtils.isNotEmpty(volumes)) {
+                for (VolumeVO rootVolume : volumes) {
+                    if (rootVolume.getPoolId() != null) {
+                        StoragePoolVO pool = 
storagePoolDao.findById(rootVolume.getPoolId());
+                        if (pool != null && pool.getClusterId() != null) {
+                            clusterId = pool.getClusterId();
+                            List<HostVO> hosts = 
hostDao.findHypervisorHostInCluster(pool.getClusterId());
+                            if (CollectionUtils.isNotEmpty(hosts)) {
+                                hostId = hosts.get(0).getId();
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        if (clusterId == null && hostId != null) {
+            HostVO host = hostDao.findById(hostId);
+            if (host != null) {
+                clusterId = host.getClusterId();
+            }
+        }
+        return new Pair<>(clusterId, hostId);
+    }

Review comment:
       @shwstppr I think virtualMachineManagerImpl.java is the better place 
since I don't see any hypervisor specific code here and this can be useful 
later for other usecases too.




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