Fix duplicate dummy templates, and update guest os for dummy template (#12780)

* Fix duplicate dummy template 'kvm-default-vm-import-dummy-template' entries

* Update guest os id of dummy template to 99 (Other Linux (64-bit)) from existing id: 1 (CentOS 4.5 (32-bit))

* update migration path to remove duplicate dummy templates

Author: sureshanaparti

api/src/main/java/org/apache/cloudstack/vm/UnmanagedVMsManager.java

@@ -26,6 +26,8 @@
 
 public interface UnmanagedVMsManager extends VmImportService, UnmanageVMService, PluggableService, Configurable {
 
+    String VM_IMPORT_DEFAULT_TEMPLATE_NAME = "system-default-vm-import-dummy-template.iso";
+    String KVM_VM_IMPORT_DEFAULT_TEMPLATE_NAME = "kvm-default-vm-import-dummy-template";
     ConfigKey<Boolean> UnmanageVMPreserveNic = new ConfigKey<>("Advanced", Boolean.class, "unmanage.vm.preserve.nics", "false",
             "If set to true, do not remove VM nics (and its MAC addresses) when unmanaging a VM, leaving them allocated but not reserved. " +
                     "If set to false, nics are removed and MAC addresses can be reassigned", true, ConfigKey.Scope.Zone);

engine/schema/src/main/java/com/cloud/upgrade/dao/Upgrade42200to42210.java

@@ -16,6 +16,14 @@
 // under the License.
 package com.cloud.upgrade.dao;
 
+import org.apache.cloudstack.vm.UnmanagedVMsManager;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.util.ArrayList;
+import java.util.List;
+
 public class Upgrade42200to42210 extends DbUpgradeAbstractImpl implements DbUpgrade, DbUpgradeSystemVmTemplate {
 
     @Override
@@ -27,4 +35,47 @@ public String[] getUpgradableVersionRange() {
     public String getUpgradedVersion() {
         return "4.22.1.0";
     }
+
+    @Override
+    public void performDataMigration(Connection conn) {
+        removeDuplicateKVMImportTemplates(conn);
+    }
+
+    private void removeDuplicateKVMImportTemplates(Connection conn) {
+        List<Long> templateIds = new ArrayList<>();
+        try (PreparedStatement selectStmt = conn.prepareStatement(String.format("SELECT id FROM cloud.vm_template WHERE name='%s' ORDER BY id ASC", UnmanagedVMsManager.KVM_VM_IMPORT_DEFAULT_TEMPLATE_NAME))) {
+            ResultSet rs = selectStmt.executeQuery();
+            while (rs.next()) {
+                templateIds.add(rs.getLong(1));
+            }
+
+            if (templateIds.size() <= 1) {
+                return;
+            }
+
+            logger.info("Removing duplicate template " + UnmanagedVMsManager.KVM_VM_IMPORT_DEFAULT_TEMPLATE_NAME + " entries");
+            Long firstTemplateId = templateIds.get(0);
+
+            String updateTemplateSql = "UPDATE cloud.vm_instance SET vm_template_id = ? WHERE vm_template_id = ?";
+            String deleteTemplateSql = "DELETE FROM cloud.vm_template WHERE id = ?";
+
+            try (PreparedStatement updateTemplateStmt = conn.prepareStatement(updateTemplateSql);
+                 PreparedStatement deleteTemplateStmt = conn.prepareStatement(deleteTemplateSql)) {
+                for (int i = 1; i < templateIds.size(); i++) {
+                    Long duplicateTemplateId = templateIds.get(i);
+
+                    // Update VM references
+                    updateTemplateStmt.setLong(1, firstTemplateId);
+                    updateTemplateStmt.setLong(2, duplicateTemplateId);
+                    updateTemplateStmt.executeUpdate();
+
+                    // Delete duplicate dummy template
+                    deleteTemplateStmt.setLong(1, duplicateTemplateId);
+                    deleteTemplateStmt.executeUpdate();
+                }
+            }
+        } catch (Exception e) {
+            logger.warn("Failed to remove duplicate template " + UnmanagedVMsManager.KVM_VM_IMPORT_DEFAULT_TEMPLATE_NAME + " entries", e);
+        }
+    }
 }

engine/schema/src/main/resources/META-INF/db/schema-42200to42210.sql

@@ -33,3 +33,5 @@ UPDATE `cloud`.`alert` SET type = 34 WHERE name = 'ALERT.VR.PRIVATE.IFACE.MTU';
 
 -- Update configuration 'kvm.ssh.to.agent' description and is_dynamic fields
 UPDATE `cloud`.`configuration` SET description = 'True if the management server will restart the agent service via SSH into the KVM hosts after or during maintenance operations', is_dynamic = 1 WHERE name = 'kvm.ssh.to.agent';
+
+UPDATE `cloud`.`vm_template` SET guest_os_id = 99 WHERE name = 'kvm-default-vm-import-dummy-template';

engine/storage/datamotion/src/main/java/org/apache/cloudstack/storage/motion/StorageSystemDataMotionStrategy.java

@@ -148,8 +148,8 @@
 import java.util.stream.Collectors;
 import org.apache.commons.collections.CollectionUtils;
 
-import static org.apache.cloudstack.vm.UnmanagedVMsManagerImpl.KVM_VM_IMPORT_DEFAULT_TEMPLATE_NAME;
-import static org.apache.cloudstack.vm.UnmanagedVMsManagerImpl.VM_IMPORT_DEFAULT_TEMPLATE_NAME;
+import static org.apache.cloudstack.vm.UnmanagedVMsManager.KVM_VM_IMPORT_DEFAULT_TEMPLATE_NAME;
+import static org.apache.cloudstack.vm.UnmanagedVMsManager.VM_IMPORT_DEFAULT_TEMPLATE_NAME;
 
 public class StorageSystemDataMotionStrategy implements DataMotionStrategy {
     protected Logger logger = LogManager.getLogger(getClass());