List only those hosts matching source host arch in multi-arch zones (apache#10369)

* List only those hosts matching source host arch in multi-arch zones

* remove duplicate import due to merge conflict

* filter only if suitable hosts aren't empty

* get cpu archs only if there are suitable hosts

Author: Pearl1594

server/src/main/java/com/cloud/server/ManagementServerImpl.java

@@ -44,6 +44,7 @@
 import javax.inject.Inject;
 import javax.naming.ConfigurationException;
 
+import com.cloud.cpu.CPU;
 import org.apache.cloudstack.acl.ControlledEntity;
 import org.apache.cloudstack.acl.SecurityChecker;
 import org.apache.cloudstack.affinity.AffinityGroupProcessor;
@@ -1654,6 +1655,14 @@ public Ternary<Pair<List<? extends Host>, Integer>, List<? extends Host>, Map<Ho
             logger.debug("Hosts having capacity and suitable for migration: {}", suitableHosts);
         }
 
+        // Only list hosts of the same architecture as the source Host in a multi-arch zone
+        if (!suitableHosts.isEmpty()) {
+            List<CPU.CPUArch> clusterArchs = ApiDBUtils.listZoneClustersArchs(vm.getDataCenterId());
+            if (CollectionUtils.isNotEmpty(clusterArchs) && clusterArchs.size() > 1) {
+                suitableHosts = suitableHosts.stream().filter(h -> h.getArch() == srcHost.getArch()).collect(Collectors.toList());
+            }
+        }
+
         return new Ternary<>(otherHosts, suitableHosts, requiresStorageMotion);
     }