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Subject [GitHub] GabrielBrascher commented on a change in pull request #2997: Allow KVM VM live migration with ROOT volume on file storage type
Date Tue, 06 Nov 2018 13:26:29 GMT
GabrielBrascher commented on a change in pull request #2997: Allow KVM VM live migration with
ROOT volume on file storage type
URL: https://github.com/apache/cloudstack/pull/2997#discussion_r231119350
 
 

 ##########
 File path: engine/storage/datamotion/src/main/java/org/apache/cloudstack/storage/motion/KvmNonManagedStorageDataMotionStrategy.java
 ##########
 @@ -0,0 +1,142 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+package org.apache.cloudstack.storage.motion;
+
+import java.util.Map;
+import java.util.Set;
+
+import javax.inject.Inject;
+
+import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
+import org.apache.cloudstack.engine.subsystem.api.storage.StrategyPriority;
+import org.apache.cloudstack.engine.subsystem.api.storage.TemplateDataFactory;
+import org.apache.cloudstack.engine.subsystem.api.storage.TemplateInfo;
+import org.apache.cloudstack.engine.subsystem.api.storage.VolumeInfo;
+import org.apache.cloudstack.storage.datastore.db.StoragePoolVO;
+import org.apache.commons.lang.StringUtils;
+import org.springframework.stereotype.Component;
+
+import com.cloud.agent.api.Answer;
+import com.cloud.agent.api.MigrateCommand;
+import com.cloud.agent.api.MigrateCommand.MigrateDiskInfo;
+import com.cloud.agent.api.storage.CreateAnswer;
+import com.cloud.agent.api.storage.CreateCommand;
+import com.cloud.agent.api.to.VirtualMachineTO;
+import com.cloud.host.Host;
+import com.cloud.hypervisor.Hypervisor.HypervisorType;
+import com.cloud.storage.DataStoreRole;
+import com.cloud.storage.DiskOfferingVO;
+import com.cloud.storage.Storage.StoragePoolType;
+import com.cloud.storage.VolumeVO;
+import com.cloud.utils.exception.CloudRuntimeException;
+import com.cloud.vm.DiskProfile;
+
+/**
+ * Extends {@link StorageSystemDataMotionStrategy}, allowing KVM hosts to migrate VMs with
the ROOT volume on a non managed local storage pool.
+ * As {@link StorageSystemDataMotionStrategy} is considering KVM, this implementation also
migrates only from/to KVM hosts.
+ */
+@Component
+public class KvmNonManagedStorageDataMotionStrategy extends StorageSystemDataMotionStrategy
{
+
+    @Inject
+    private TemplateDataFactory tmplFactory;
+
+    /**
+     * Uses the canHandle from the Super class {@link StorageSystemDataMotionStrategy}. If
the storage pool is of file and the internalCanHandle from {@link StorageSystemDataMotionStrategy}
CANT_HANDLE, returns the HIGHEST strategy priority. otherwise returns CANT_HANDLE.
+     * Note that the super implementation (overrided) is called by {@link #canHandle(Map,
Host, Host)} which ensures that {@link #internalCanHandle(Map)} will be executed only if the
source host is KVM.
+     */
+    @Override
+    protected StrategyPriority internalCanHandle(Map<VolumeInfo, DataStore> volumeMap)
{
+        if (super.internalCanHandle(volumeMap) == StrategyPriority.CANT_HANDLE) {
+            Set<VolumeInfo> volumeInfoSet = volumeMap.keySet();
+
+            for (VolumeInfo volumeInfo : volumeInfoSet) {
+                StoragePoolVO storagePoolVO = _storagePoolDao.findById(volumeInfo.getPoolId());
+                if (storagePoolVO.getPoolType() != StoragePoolType.Filesystem) {
 
 Review comment:
   I agree with you, @wido, thanks for pointing that.

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