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

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 com.cloud.utils.security.CertificateHelper;
 import org.apache.cloudstack.acl.ControlledEntity;
 import org.apache.cloudstack.acl.SecurityChecker;
@@ -1612,6 +1613,10 @@ 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
+        CPU.CPUArch hostArch = srcHost.getArch();
+        suitableHosts = suitableHosts.stream().filter(h -> h.getArch() == hostArch).collect(Collectors.toList());
+
         return new Ternary<>(otherHosts, suitableHosts, requiresStorageMotion);
     }