问题痛点：由于AlwaysOn和数据库镜像无法同步数据库外实例对象，例如 登录用户、作业、链接服务器等，导致主库切换之后，应用连接不上数据库或者作业不存在导致每晚跑批任务漏跑等
目前来看，作业等其他实例对象的同步还比较难实现，比如作业分为很多步骤，而且作业包含的命令也比较复杂，作业也支持调用其他子系统，比如 PowerShell ，ActiveX，CmdExec等数据库外部程序和命令，用动态SQL方式很难处理
目前只有升级到SQL Server 2022并使用包含可用性组（支持同步登录用户、SQL代理作业、链接服务器）才能最丝滑的解决这个问题
本文主要介绍的是登录用户的同步，毕竟登录用户的重要性还是比较高的，应用需要先通过登录用户登录DB实例才能执行后续的操作
要在SQLServer实例间同步登录用户，主要有几种方法
1、创建操作系统域用户，然后创建基于这个域用户的登录用户，因为域用户在域里面是同步的，但是这种方法前提是需要有域环境，而且普通开发人员一般也没有域控机器权限创建域用户
2、使用外部第三方工具，比如 sqlcmd，PowerShell，SQLServer自带的SSIS服务
3、使用链接服务器 和 动态拼接SQL方法
本文主要使用第三种方法，因为第三种方法本人认为有下面几种优势
1、保证最低维护成本，纯SQL实现，不需要借助第三方工具
2、通用性，几乎所有SQL Server版本都能用，也不需要像第三方工具例如 PowerShell那样有时候需要升级版本
3、兼容性，跨操作系统平台Linux、Windows
4、高可靠性，使用SQLServer自带原生工具，足够简单高效
这个工具脚本的主要流程如下
这个工具脚本的架构图
具体使用步骤
假设有三个AlwaysOn节点，分别是
node1 ip：192.168.10.10
node2 ip：192.168.10.11
node3 ip：192.168.10.12
step1： 创建链接服务器，在所有AlwaysOn节点上创建其他节点的链接服务器，比如在192.168.10.10上创建其他节点链接服务器，下面脚本在192.168.10.10服务器上执行，其他节点以此类推
--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： 创建存储过程，在所有AlwaysOn节点上创建存储过程，记住是所有AlwaysOn节点都要执行
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)
--The sp_hexadecimal stored procedure is used to generate the user's password hash value and the user's SID
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
--The temporary table below is used to save the generated login user script , user by user, line by line
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 diff 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 cursor traversal loop
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： 创建作业定时执行上面的存储过程，在所有AlwaysOn节点上创建作业，记住是所有AlwaysOn节点都要执行，下面脚本默认是60分钟执行一次
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
所有步骤完毕
对于这个自动定时同步登录用户脚本有以下说明
本工具脚本遵循的思想是，不做减法，只做加法，尽可能减少对线上生产环境影响，主要有下面几点：
（1）新增用户：如果从库不存在同步过来的用户，就新建用户
（2）更新用户：如果从库存在同步过来的用户，就会判断用户SID和用户密码是否一样，如果用户SID一样，密码不一样，就更新用户密码
（3）删除用户：如果从库存在同名用户，就不新建用户，否则新建用户，为了尽可能减少对线上生产环境影响，不做删除用户操作，所以如果从库存在同名用户并且用户SID不同，建议手动删除用户由脚本自动同步主库用户过来
无论是新增用户还是更新用户，都会执行添加服务器角色权限的步骤，如果同名用户已经存在当前服务器角色权限，那么再次执行添加服务器角色权限并不会有任何影响，而且本工具脚本并不会删除同名用户的服务器角色权限
最终目的：不做减法，只做加法，尽可能减少对线上生产环境影响
对于这个自动定时同步登录用户脚本有下面几个注意点
1、本工具脚本使用sa用户来创建链接服务器，所以不会同步sa用户，注意如果更改了sa用户密码，也要同步更改链接服务器密码，当然您也可以使用其他有足够权限的用户来创建链接服务器
2、新建登录用户的时候，一定要确保在主库上新建登录用户，否则可能会无法实施数据库角色权限或者无法同步该登录用户
3、新建登录用户时候，登录用户名不要带有特殊字符，例如单引号，否则差异脚本有可能不work
4、这个脚本是针对AlwaysOn集群，当然如果你是数据库镜像环境，你可以改一下代码，把判断AlwaysOn主库的部分改为判断镜像主库就可以了
5、如果对登录用户同步延迟有要求，那么可以修改作业执行频率，默认是60分钟执行一次
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