SQL Server範例間同步登入使用者
2023-09-11 18:00:50
SQL Server範例間同步登入使用者
問題痛點：由於AlwaysOn和資料庫映象無法同步資料庫外範例物件，例如 登入使用者、作業、連結伺服器等，導致主庫切換之後，應用連線不上資料庫或者作業不存在導致每晚跑批任務漏跑等
目前來看，作業等其他範例物件的同步還比較難實現，比如作業分為很多步驟，而且作業包含的命令也比較複雜，作業也支援呼叫其他子系統，比如 PowerShell ，ActiveX，CmdExec等資料庫外部程式和命令，用動態SQL方式很難處理
本文主要介紹的是登入使用者的同步，畢竟登入使用者的重要性還是比較高的，應用需要先通過登入使用者登入DB範例才能執行後續的操作
要在SQLServer範例間同步登入使用者，主要有幾種方法
1、建立作業系統域使用者，然後建立基於這個域使用者的登入使用者，因為域使用者在域裡面是同步的，但是這種方法前提是需要有域環境，而且普通開發人員一般也沒有域控機器許可權建立域使用者
2、使用外部第三方工具，比如 sqlcmd，PowerShell
3、使用連結伺服器 和 動態拼接SQL方法
本文主要使用第三種方法，因為第三種方法本人認為有下面幾種優勢
1、保證最低維護成本，純SQL實現，不需要藉助第三方工具
2、通用性，幾乎所有SQL Server版本都能用，也不需要像第三方工具例如 PowerShell那樣有時候需要升級版本
3、相容性，跨作業系統平臺Linux、Windows
4、高可靠性，使用SQLServer自帶原生工具，足夠簡單高效
這個工具指令碼的主要流程如下
具體使用步驟
假設有三個AlwaysOn節點，分別是
node1 ip：192.168.10.10
node2 ip：192.168.10.11
node3 ip：192.168.10.12
step1： 建立連結伺服器，在所有AlwaysOn節點上建立其他節點的連結伺服器，比如在192.168.10.10上建立其他節點連結伺服器，下面指令碼在192.168.10.10伺服器上執行，其他節點以此類推
--create linkedserver USE [master] GO DECLARE @IP NVARCHAR(MAX) DECLARE @Login NVARCHAR(MAX) DECLARE @PWD NVARCHAR(MAX) SET @Login = N'sa' --★Do SET @PWD = N'xxxxxx' --★Do SET @IP ='192.168.10.11,1433' --★Do EXEC master.dbo.sp_addlinkedserver @server = @IP,@srvproduct = N'SQL Server' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'collation compatible', @optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'data access', @optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'dist',@optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'pub',@optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'rpc',@optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'rpc out',@optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'sub',@optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'connect timeout', @optvalue = N'0' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'collation name', @optvalue = NULL EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'lazy schema validation', @optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'query timeout', @optvalue = N'0' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'use remote collation', @optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'connect timeout', @optvalue = N'120' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'query timeout', @optvalue = N'120' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'remote proc transaction promotion',@optvalue = N'true' USE [master] EXEC master.dbo.sp_addlinkedsrvlogin @rmtsrvname = @IP, @locallogin = NULL, @useself = N'False', @rmtuser = @Login, @rmtpassword = @PWD --------------------------------------------------------------------------------------------------------------------------- --create linkedserver USE [master] GO DECLARE @IP NVARCHAR(MAX) DECLARE @Login NVARCHAR(MAX) DECLARE @PWD NVARCHAR(MAX) SET @Login = N'sa' --★Do SET @PWD = N'xxxxxx' --★Do SET @IP ='192.168.10.12,1433' --★Do EXEC master.dbo.sp_addlinkedserver @server = @IP,@srvproduct = N'SQL Server' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'collation compatible', @optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'data access', @optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'dist',@optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'pub',@optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'rpc',@optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'rpc out',@optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP, @optname = N'sub',@optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'connect timeout', @optvalue = N'0' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'collation name', @optvalue = NULL EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'lazy schema validation', @optvalue = N'false' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'query timeout', @optvalue = N'0' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'use remote collation', @optvalue = N'true' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'connect timeout', @optvalue = N'120' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'query timeout', @optvalue = N'120' EXEC master.dbo.sp_serveroption @server = @IP,@optname = N'remote proc transaction promotion',@optvalue = N'true' USE [master] EXEC master.dbo.sp_addlinkedsrvlogin @rmtsrvname = @IP, @locallogin = NULL, @useself = N'False', @rmtuser = @Login, @rmtpassword = @PWD
step2： 建立儲存過程，在所有AlwaysOn節點上建立儲存過程，記住是所有AlwaysOn節點都要執行
USE [master] GO -- ================================================================= -- Author: <steven> -- Create date: <2021-12-26> -- Description: <Synchronize login users between multiple SQLServer Instances> -- ================================================================= create PROCEDURE [dbo].[usp_SyncLoginUserRegularBetweenInstances] AS BEGIN IF EXISTS(SELECT 1 FROM sys.dm_hadr_availability_replica_states hars INNER JOIN sys.availability_groups ag ON ag.group_id = hars.group_id INNER JOIN sys.availability_replicas ar ON ar.replica_id = hars.replica_id WHERE [hars].[is_local] = 1 AND [hars].[role_desc] = 'PRIMARY'AND [hars].[operational_state_desc] = 'ONLINE' AND [hars].[synchronization_health_desc] = 'HEALTHY') BEGIN ----Check for prerequisite, if not present deploy it. IF NOT EXISTS (SELECT id FROM [master].[dbo].[sysobjects] where name='sp_hexadecimal' and xtype='P') BEGIN DECLARE @sp_hexadecimalcreatescript NVARCHAR(3000) SET @sp_hexadecimalcreatescript = N' CREATE PROCEDURE [dbo].[sp_hexadecimal] @binvalue VARBINARY(256) , @hexvalue VARCHAR(514) OUTPUT AS DECLARE @charvalue VARCHAR(514); DECLARE @i INT; DECLARE @length INT; DECLARE @hexstring CHAR(16); SELECT @charvalue = ''0x''; SELECT @i = 1; SELECT @length = DATALENGTH(@binvalue); SELECT @hexstring = ''0123456789ABCDEF''; WHILE ( @i <= @length ) BEGIN DECLARE @tempint INT; DECLARE @firstint INT; DECLARE @secondint INT; SELECT @tempint = CONVERT(INT, SUBSTRING(@binvalue, @i, 1)); SELECT @firstint = FLOOR(@tempint / 16); SELECT @secondint = @tempint - ( @firstint * 16 ); SELECT @charvalue = @charvalue + SUBSTRING(@hexstring, @firstint + 1, 1) + SUBSTRING(@hexstring, @secondint + 1, 1); SELECT @i = @i + 1; END; SELECT @hexvalue = @charvalue;' EXEC [master].[dbo].sp_executesql @sp_hexadecimalcreatescript END DECLARE @TempTable TABLE (id INT IDENTITY ,Script NVARCHAR(MAX)) DECLARE @Login NVARCHAR(MAX) DECLARE CURLOGIN CURSOR FOR SELECT name FROM sys.server_principals WHERE [type] = 'S' AND [is_disabled] =0 AND [name] <> 'sa' --WHERE CONVERT(VARCHAR(24), create_date, 103) = CONVERT(VARCHAR(24), GETDATE(), 103) -- OR CONVERT(VARCHAR(24), modify_date, 103) = CONVERT(VARCHAR(24), GETDATE(), 103) OPEN CURLOGIN FETCH NEXT FROM CURLOGIN INTO @Login WHILE @@FETCH_STATUS = 0 BEGIN SET NOCOUNT ON DECLARE @Script NVARCHAR(MAX) DECLARE @LoginName VARCHAR(1500) = @Login DECLARE @LoginSID VARBINARY(400) DECLARE @SID_String VARCHAR(1514) DECLARE @LoginPWD VARBINARY(1256) DECLARE @PWD_String VARCHAR(1514) DECLARE @LoginType CHAR(1) DECLARE @is_disabled BIT DECLARE @default_database_name SYSNAME DECLARE @default_language_name SYSNAME DECLARE @is_policy_checked BIT DECLARE @is_expiration_checked BIT DECLARE @createdDateTime DATETIME SELECT @LoginSID = P.[sid] , @LoginType = P.[type] , @is_disabled = P.is_disabled , @default_database_name = P.default_database_name , @default_language_name = P.default_language_name , @createdDateTime = P.create_date FROM sys.server_principals P WHERE P.name = @LoginName SET @Script = '' --If the login is a SQL Login, then do a lot of stuff... IF @LoginType = 'S' BEGIN SET @LoginPWD = CAST(LOGINPROPERTY(@LoginName, 'PasswordHash') AS VARBINARY(256)) EXEC [master].[dbo].[sp_hexadecimal] @LoginPWD, @PWD_String OUT EXEC [master].[dbo].[sp_hexadecimal] @LoginSID, @SID_String OUT SELECT @is_policy_checked = S.is_policy_checked , @is_expiration_checked = S.is_expiration_checked FROM sys.sql_logins S WHERE S.[type] = 'S' AND S.[is_disabled] =0 -- Create Script SET @Script = @Script + CHAR(13) + CHAR(13) + '''' + CHAR(13) + 'USE [master];' + CHAR(13) + 'IF EXISTS (SELECT name FROM sys.server_principals WHERE name= ''''' + @LoginName + ''''') ' + CHAR(13) + 'BEGIN ' + CHAR(13) + CHAR(9) + ' DECLARE @CurrentLoginPWD VARBINARY(512)' + CHAR(13) + CHAR(9) + ' DECLARE @CurrentPWD_String VARCHAR(1514)' + CHAR(13) + CHAR(9) + ' DECLARE @CurrentLoginSID VARBINARY(400)' + CHAR(13) + CHAR(9) + ' DECLARE @CurrentSID_String VARCHAR(1514)' + CHAR(13) + CHAR(9) + ' SELECT @CurrentLoginSID = [sid] FROM sys.server_principals WHERE name = '''''+ @LoginName +'''''' + CHAR(13) + CHAR(9) + ' SET @CurrentLoginPWD =CAST(LOGINPROPERTY(''''' + @LoginName + ''''', ' + '''''PasswordHash''''' +') AS VARBINARY(512))' + CHAR(13) + CHAR(9) + ' EXEC [master].[dbo].[sp_hexadecimal] @CurrentLoginPWD , @CurrentPWD_String OUT ' + CHAR(13) + CHAR(9) + ' EXEC [master].[dbo].[sp_hexadecimal] @CurrentLoginSID, @CurrentSID_String OUT ' + CHAR(13) + CHAR(9) + ' --Compare two SID if the same ' + CHAR(13) + CHAR(9) + ' IF ''''' + @SID_String + ''''' = @CurrentSID_String ' + CHAR(13) + CHAR(9) + ' BEGIN' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + ' --Compare two password if the same ' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + ' IF ''''' + @PWD_String + ''''' <> @CurrentPWD_String ' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + ' BEGIN' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + CHAR(9) + '--Just update login user password' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + CHAR(9) + ' ALTER LOGIN ' + QUOTENAME(@LoginName) + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + CHAR(9) + ' WITH PASSWORD = ' + @PWD_String + ' HASHED' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + CHAR(9) + ', DEFAULT_DATABASE = [' + @default_database_name + ']' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + CHAR(9) + ', DEFAULT_LANGUAGE = [' + @default_language_name + ']' + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + CHAR(9) + ', CHECK_POLICY ' + CASE WHEN @is_policy_checked = 0 THEN '=OFF' ELSE '=ON' END + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + CHAR(9) + ', CHECK_EXPIRATION ' + CASE WHEN @is_expiration_checked = 0 THEN '=OFF' ELSE '=ON' END + CHAR(13) + CHAR(9) + CHAR(9) + CHAR(9) + ' END' + CHAR(13) + CHAR(9) + ' END' + CHAR(13) + 'END ' + CHAR(13) + 'ELSE' + CHAR(13) + 'BEGIN ' + CHAR(13) + CHAR(9) + ' --Create new login user ' + CHAR(13) + CHAR(9) + ' CREATE LOGIN ' + QUOTENAME(@LoginName) + CHAR(13) + CHAR(9) + ' WITH PASSWORD = ' + @PWD_String + ' HASHED' + CHAR(13) + CHAR(9) + ', SID = ' + @SID_String + CHAR(13) + CHAR(9) + ', DEFAULT_DATABASE = [' + @default_database_name + ']' + CHAR(13) + CHAR(9) + ', DEFAULT_LANGUAGE = [' + @default_language_name + ']' + CHAR(13) + CHAR(9) + ', CHECK_POLICY ' + CASE WHEN @is_policy_checked = 0 THEN '=OFF' ELSE '=ON' END + CHAR(13) + CHAR(9) + ', CHECK_EXPIRATION ' + CASE WHEN @is_expiration_checked = 0 THEN '=OFF' ELSE '=ON' END + CHAR(13) + 'END ' --SET @Script = @Script + CHAR(13) + CHAR(13) -- + ' ALTER LOGIN [' + @LoginName + ']' -- + CHAR(13) + CHAR(9) + 'WITH DEFAULT_DATABASE = [' + @default_database_name + ']' -- + CHAR(13) + CHAR(9) + ', DEFAULT_LANGUAGE = [' + @default_language_name + ']' END --ELSE --BEGIN -- --The login is a NT login (or group). -- SET @Script = @Script + CHAR(13) + CHAR(13) -- + 'IF NOT EXISTS (SELECT name FROM sys.server_principals WHERE name= ''' + @LoginName + ''') ' -- + CHAR(13) + ' BEGIN ' -- + CHAR(13) + CHAR(9) + ' CREATE LOGIN ' + QUOTENAME(@LoginName) + ' FROM WINDOWS' -- + CHAR(13) + CHAR(9) + 'WITH DEFAULT_DATABASE = [' + @default_database_name + ']' -- + CHAR(13) + ' END ' --END --This section deals with the Server Roles that belong to that login... DECLARE @ServerRoles TABLE ( ServerRole SYSNAME , MemberName SYSNAME , MemberSID VARBINARY(185) ) ----Prevent multiple records from being inserted into the @ServerRoles table IF NOT EXISTS (SELECT 1 FROM @ServerRoles ) BEGIN INSERT INTO @ServerRoles EXEC sp_helpsrvrolemember END ----Remove all Roles --SET @Script = @Script + CHAR(13) --SET @Script = @Script -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''sysadmin''' -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''securityadmin''' -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''serveradmin''' -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''setupadmin''' -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''processadmin''' -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''diskadmin''' -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''dbcreator''' -- + CHAR(13) + 'EXEC sp_dropsrvrolemember ' + QUOTENAME(@LoginName) + ', ''bulkadmin''' /** Output to script... **/ --SET @Script = @Script + CHAR(13) + CHAR(13) --Test if there are any server roles for this login... IF EXISTS(SELECT 1 FROM @ServerRoles WHERE MemberName = @LoginName) BEGIN SET @Script = @Script + CHAR(13) DECLARE @ServerRole SYSNAME DECLARE curRoles CURSOR LOCAL STATIC FORWARD_ONLY FOR SELECT ServerRole FROM @ServerRoles WHERE MemberName = @LoginName OPEN curRoles FETCH NEXT FROM curRoles INTO @ServerRole WHILE @@FETCH_STATUS = 0 BEGIN /** Output to Script **/ SET @Script = @Script + CHAR(13) + 'EXEC sp_addsrvrolemember ' + QUOTENAME(@LoginName) + ', ' + '''''' + @ServerRole + '''''' FETCH NEXT FROM curRoles INTO @ServerRole END --Cleanup. CLOSE curRoles DEALLOCATE curRoles END SET @Script = @Script + CHAR(13) + '''' INSERT INTO @TempTable VALUES(@Script) FETCH NEXT FROM CURLOGIN INTO @Login END CLOSE CURLOGIN; DEALLOCATE CURLOGIN; SELECT id, Script FROM @TempTable ORDER BY id ------------------------------------------------------------------------------------ --Use linked servers to send scripts to remote machines for execution -------------------------------------------------------------------------------- DECLARE @LinkedServerName NVARCHAR(512); DECLARE @DynamicSQL NVARCHAR(MAX); DECLARE @EXISTSSQL NVARCHAR(2000); DECLARE cursor_linked_servers CURSOR FOR SELECT name FROM sys.servers WHERE is_linked = 1 AND [product]='SQL Server' AND [provider]='SQLNCLI' AND [connect_timeout]>0 AND [query_timeout] >0; OPEN cursor_linked_servers; FETCH NEXT FROM cursor_linked_servers INTO @LinkedServerName; WHILE @@FETCH_STATUS = 0 BEGIN --Determine whether the remote machine has the stored procedure call "sp_hexadecimal" --if not have do not execute the scripts CREATE TABLE #EXISTSTB(id BIGINT) SET @EXISTSSQL='SELECT * FROM OPENQUERY('+ QUOTENAME(@LinkedServerName) + ', ''SELECT id FROM [master].[dbo].[sysobjects] WHERE name = ''''sp_hexadecimal'''' AND xtype=''''P'''' '')' INSERT INTO #EXISTSTB EXEC(@EXISTSSQL) IF EXISTS(SELECT * FROM #EXISTSTB) BEGIN DECLARE @RunSQL NVARCHAR(MAX) DECLARE CURSYNC CURSOR FOR SELECT Script FROM @TempTable ORDER BY id OPEN CURSYNC FETCH NEXT FROM CURSYNC INTO @RunSQL WHILE @@FETCH_STATUS = 0 BEGIN SET @DynamicSQL = 'EXEC('+ @RunSQL + ') AT ['+ @LinkedServerName +']' EXEC sp_executesql @DynamicSQL; FETCH NEXT FROM CURSYNC INTO @RunSQL END; CLOSE CURSYNC DEALLOCATE CURSYNC END DROP TABLE #EXISTSTB FETCH NEXT FROM cursor_linked_servers INTO @LinkedServerName; END; -- close cursor CLOSE cursor_linked_servers; DEALLOCATE cursor_linked_servers; END END
step3： 建立作業定時執行上面的儲存過程，在所有AlwaysOn節點上建立作業，記住是所有AlwaysOn節點都要執行，下面指令碼預設是60分鐘執行一次
USE [msdb] GO /****** Object: Job [synchronize_loginusers] Script Date: 2023/9/6 15:46:26 ******/ BEGIN TRANSACTION DECLARE @ReturnCode INT SELECT @ReturnCode = 0 /****** Object: JobCategory [Database Maintenance] Script Date: 2023/9/6 15:46:26 ******/ IF NOT EXISTS (SELECT name FROM msdb.dbo.syscategories WHERE name=N'Database Maintenance' AND category_class=1) BEGIN EXEC @ReturnCode = msdb.dbo.sp_add_category @class=N'JOB', @type=N'LOCAL', @name=N'Database Maintenance' IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback END DECLARE @jobId BINARY(16) EXEC @ReturnCode = msdb.dbo.sp_add_job @job_name=N'synchronize_loginusers', @enabled=1, @notify_level_eventlog=0, @notify_level_email=0, @notify_level_netsend=0, @notify_level_page=0, @delete_level=0, @description=N'Synchronize login users between SQL Server Instances', @category_name=N'Database Maintenance', @owner_login_name=N'sa', @job_id = @jobId OUTPUT IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback /****** Object: Step [execute SyncLoginUsers script] Script Date: 2023/9/6 15:46:26 ******/ EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'execute SyncLoginUsers script', @step_id=1, @cmdexec_success_code=0, @on_success_action=1, @on_success_step_id=0, @on_fail_action=2, @on_fail_step_id=0, @retry_attempts=0, @retry_interval=0, @os_run_priority=0, @subsystem=N'TSQL', @command=N'exec [master].[dbo].[usp_SyncLoginUserRegularBetweenInstances] ', @database_name=N'master', @flags=0 IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback EXEC @ReturnCode = msdb.dbo.sp_update_job @job_id = @jobId, @start_step_id = 1 IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback EXEC @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id=@jobId, @name=N'Schedule SyncLoginUsers', @enabled=1, @freq_type=4, @freq_interval=1, @freq_subday_type=4, @freq_subday_interval=60, @freq_relative_interval=0, @freq_recurrence_factor=0, @active_start_date=20110224, @active_end_date=99991231, @active_start_time=200, @active_end_time=235959, @schedule_uid=N'563258f6-0b3f-47bf-b9b3-2f597038cc38' IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback EXEC @ReturnCode = msdb.dbo.sp_add_jobserver @job_id = @jobId, @server_name = N'(local)' IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback COMMIT TRANSACTION GOTO EndSave QuitWithRollback: IF (@@TRANCOUNT > 0) ROLLBACK TRANSACTION EndSave: GO
所有步驟完畢
對於這個自動定時同步登入使用者指令碼有以下說明
本工具指令碼遵循的思想是，不做減法，只做加法，儘可能減少對線上生產環境影響，主要有下面幾點：
（1）新增使用者：如果從庫不存在同步過來的使用者，就新建使用者
（2）更新使用者：如果從庫存在同步過來的使用者，就會判斷使用者SID和使用者密碼是否一樣，如果使用者SID一樣，密碼不一樣，就更新使用者密碼
（3）刪除使用者：如果從庫存在同名使用者，就不新建使用者，否則新建使用者，為了儘可能減少對線上生產環境影響，不做刪除使用者操作，所以如果從庫存在同名使用者並且使用者SID不同，建議手動刪除使用者由指令碼自動同步主庫使用者過來
無論是新增使用者還是更新使用者，都會執行新增伺服器角色許可權的步驟，如果同名使用者已經存在當前伺服器角色許可權，那麼再次執行新增伺服器角色許可權並不會有任何影響，而且本工具指令碼並不會刪除同名使用者的伺服器角色許可權
最終目的：不做減法，只做加法，儘可能減少對線上生產環境影響
對於這個自動定時同步登入使用者指令碼有下面幾個注意點
1、本工具指令碼使用sa使用者來建立連結伺服器，所以不會同步sa使用者，注意如果更改了sa使用者密碼，也要同步更改連結伺服器密碼，當然您也可以使用其他有足夠許可權的使用者來建立連結伺服器
2、新建登入使用者的時候，一定要確保在主庫上新建登入使用者，否則可能會無法實施資料庫角色許可權或者無法同步該登入使用者
3、新建登入使用者時候，登入使用者名稱不要帶有特殊字元，例如單引號，否則差異指令碼有可能不work
4、這個指令碼是針對AlwaysOn叢集，當然如果你是資料庫映象環境，你可以改一下程式碼，把判斷AlwaysOn主庫的部分改為判斷映象主庫就可以了
5、如果對登入使用者同步延遲有要求，那麼可以修改作業執行頻率，預設是60分鐘執行一次
參考文章
https://maq.guru/synchronizing-sql-server-logins-in-an-always-on-availability-group/
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