apache
diff --git a/‎engine/schema/src/main/java/com/cloud/storage/dao/VolumeDao.java‎
Lines changed: 7 additions & 0 deletions b/‎engine/schema/src/main/java/com/cloud/storage/dao/VolumeDao.java‎
Lines changed: 7 additions & 0 deletions
diff --git a/‎engine/schema/src/main/java/com/cloud/storage/dao/VolumeDaoImpl.java‎
Lines changed: 23 additions & 0 deletions b/‎engine/schema/src/main/java/com/cloud/storage/dao/VolumeDaoImpl.java‎
Lines changed: 23 additions & 0 deletions
diff --git a/‎plugins/storage/volume/ontap/pom.xml‎
Lines changed: 5 additions & 0 deletions b/‎plugins/storage/volume/ontap/pom.xml‎
Lines changed: 5 additions & 0 deletions
@@ -182,6 +182,13 @@ public interface VolumeDao extends GenericDao<VolumeVO, Long>, StateDao<Volume.S
 
     boolean existsWithKmsKey(long kmsKeyId);
 
+    /**
+     * Returns true if any VM with a non-destroyed ROOT volume on {@code poolId} also has a
+     * non-destroyed DATADISK on a different primary storage pool. Existence check only
+     * ({@code LIMIT 1}); does not load volumes into memory.
+     */
+    boolean hasMultiPrimaryStoragePoolVm(long poolId);
+
     /**
      *  Retrieves volume by its externalId
      *
 
@@ -96,6 +96,14 @@ public class VolumeDaoImpl extends GenericDaoBase<VolumeVO, Long> implements Vol
     protected static final String SELECT_HYPERTYPE_FROM_CLUSTER_VOLUME = "SELECT c.hypervisor_type from volumes v, storage_pool s, cluster c where v.pool_id = s.id and s.cluster_id = c.id and v.id = ?";
     protected static final String SELECT_HYPERTYPE_FROM_ZONE_VOLUME = "SELECT s.hypervisor from volumes v, storage_pool s where v.pool_id = s.id and v.id = ?";
     protected static final String SELECT_POOLSCOPE = "SELECT s.scope from storage_pool s, volumes v where s.id = v.pool_id and v.id = ?";
+    // Looks for a VM whose root disk is on this pool and whose data disk is on another pool.
+    // LIMIT 1 stops after the first match so we do not load all volumes.
+    private static final String HAS_MULTI_PRIMARY_STORAGE_POOL_VM =
+            "SELECT 1 FROM volumes root INNER JOIN volumes data ON data.instance_id = root.instance_id "
+                    + "WHERE root.pool_id = ? AND root.volume_type = 'ROOT' AND root.instance_id IS NOT NULL "
+                    + "AND root.removed IS NULL AND root.state NOT IN ('Destroy', 'Expunged') "
+                    + "AND data.volume_type = 'DATADISK' AND data.pool_id IS NOT NULL AND data.pool_id <> ? "
+                    + "AND data.removed IS NULL AND data.state NOT IN ('Destroy', 'Expunged') LIMIT 1";
 
     private static final String ORDER_POOLS_NUMBER_OF_VOLUMES_FOR_ACCOUNT_PART1 = "SELECT pool.id, SUM(IF(vol.state='Ready' AND vol.account_id = ?, 1, 0)) FROM `cloud`.`storage_pool` pool LEFT JOIN `cloud`.`volumes` vol ON pool.id = vol.pool_id WHERE pool.data_center_id = ? ";
     private static final String ORDER_POOLS_NUMBER_OF_VOLUMES_FOR_ACCOUNT_PART2 = " GROUP BY pool.id ORDER BY 2 ASC ";
@@ -998,6 +1006,21 @@ public boolean existsWithKmsKey(long kmsKeyId) {
         return findOneBy(sc) != null;
     }
 
+    @Override
+    @DB
+    public boolean hasMultiPrimaryStoragePoolVm(long poolId) {
+        TransactionLegacy txn = TransactionLegacy.currentTxn();
+        try (PreparedStatement pstmt = txn.prepareAutoCloseStatement(HAS_MULTI_PRIMARY_STORAGE_POOL_VM)) {
+            pstmt.setLong(1, poolId);
+            pstmt.setLong(2, poolId);
+            try (ResultSet rs = pstmt.executeQuery()) {
+                return rs.next();
+            }
+        } catch (SQLException e) {
+            throw new CloudRuntimeException("DB Exception on: " + HAS_MULTI_PRIMARY_STORAGE_POOL_VM, e);
+        }
+    }
+
     public VolumeVO findByExternalUuid(String externalUuid) {
         SearchCriteria<VolumeVO> sc = ExternalUuidSearch.create();
         sc.setParameters("externalUuid", externalUuid);
 
@@ -86,6 +86,11 @@
             <artifactId>cloud-engine-storage-volume</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.cloudstack</groupId>
+            <artifactId>cloud-framework-cluster</artifactId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>io.swagger</groupId>
             <artifactId>swagger-annotations</artifactId>