1. 背景
当系统的微服务化做的不是很高的时候,部分功能要通过DB LinkServer 来实现跨 Server 查询,当然,有时候BI抽数据、DBA数据库维护可能也会创建LinkServer。
特别是当 DB迁移的时候,我们需要检查、创建 DB LinkServer。
2.脚本实现
下面是我们创建的一个存储过程,通过这个存储过程来实现简单、快速的添加链接服务器。
USE [DBA_Manager] GO /****** Object: StoredProcedure [dbo].[USP_Create_DBLink] Script Date: 2019/7/5 13:52:50 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: <Author,,Carson> -- Create date: <Create Date,2018-06-18,> -- Description: <Description,实现创建DB LinkServer的脚本化,> -- ============================================= CREATE PROCEDURE [dbo].[USP_Create_DBLink] -- Add the parameters for the stored procedure here @ServerIP varchar(20),@SQLUserName varchar(20)='',@PassW varchar(20)='',@DelCurLinks varchar(10)='N', @Result nvarchar(3000)='' output AS BEGIN SET NOCOUNT ON; declare @OriginalSQL nvarchar(3000) declare @sSQL nvarchar(3000) ---------------------------------------------- ---判断指定的ServerIP是否已存在DBLinkServer,结合@DelCurLinks输入参数判断是否删除重建 if @DelCurLinks='Y' and exists(select srvname from master.dbo.sysservers where srvname <> SERVERPROPERTY('servername') and srvname=@ServerIP) begin set @sSQL=' EXEC master.dbo.sp_dropserver @server=N'''+@ServerIP+''', @droplogins=''droplogins''' Print @sSQL exec sp_executesql @sSQL end if not exists(select srvname from master.dbo.sysservers where srvname <> SERVERPROPERTY('servername') and srvname=@ServerIP) or @DelCurLinks='Y' begin --create script set @OriginalSQL='/****** Object: LinkedServer [<ServerIP>] ******/ EXEC master.dbo.sp_addlinkedserver @server = N''<ServerIP>'', @srvproduct=N''SQL Server'' /* For security reasons the linked server remote logins password is changed with ######## */ EXEC master.dbo.sp_addlinkedsrvlogin @rmtsrvname=N''<ServerIP>'',@useself=N''False'',@locallogin=NULL,@rmtuser=N''<UserName>'',@rmtpassword=''<PWD>'' --GO EXEC master.dbo.sp_serveroption @server=N''<ServerIP>'', @optname=N''collation compatible'', @optvalue=N''true'' --GO EXEC master.dbo.sp_serveroption @server=N''<ServerIP>'', @optname=N''data access'', @optvalue=N''true'' --GO EXEC master.dbo.sp_serveroption @server=N''<ServerIP>'', @optname=N''rpc'', @optvalue=N''true'' --GO EXEC master.dbo.sp_serveroption @server=N''<ServerIP>'', @optname=N''rpc out'', @optvalue=N''true'' --GO EXEC master.dbo.sp_serveroption @server=N''<ServerIP>'', @optname=N''use remote collation'', @optvalue=N''true'' --GO EXEC master.dbo.sp_serveroption @server=N''<ServerIP>'', @optname=N''remote proc transaction promotion'', @optvalue=N''true'' --GO ' set @sSQL=REPLACE( @OriginalSQL, '<ServerIP>',@ServerIP ) set @sSQL=REPLACE( @sSQL, '<UserName>',@SQLUserName ) set @sSQL=REPLACE( @sSQL, '<PWD>',@PassW ) begin try exec sp_executesql @sSQL print @sSQL print 'Create Link Server['+ @ServerIP +'] successfully!' end try begin catch print 'Create Link Server ['+ @ServerIP +'] fail! ErrMsg: '+ERROR_MESSAGE() end catch end if @DelCurLinks='N' and exists(select srvname from master.dbo.sysservers where srvname <> SERVERPROPERTY('servername') and srvname=@ServerIP) begin print 'Create Link Server ['+ @ServerIP +'] fail! ErrMsg: Find DBLinkserver of the Same Name ,Please Check it.' end END GO
3.方法使用
方法 1: 只输入IP、UID、PWD三个参数,@DelCurLinks不显示输入【此时,@DelCurLinks默认为 N,指明当存在相同的LinkServer时,不删除直接退出。】
Exec USP_Create_DBLink '172.XXX.XXX.XXX','UID','PWD'
方法 2:输入IP、UID、PWD、DelCurLinks 四个参数,显示指明当存在相同的LinkServer时,不删除直接退出。
Exec USP_Create_DBLink '172.XXX.XXX.XXX','UID','PWD','N'
方法 3:输入IP、UID、PWD、DelCurLinks 四个参数,显示指明当存在相同的LinkServer时,删除重新创建
Exec USP_Create_DBLink '172.XXX.XXX.XXX','UID','PWD','Y'
4. 其它知识
(1) 查询本SQL Server 已创建的所有实例
select srvname as '链接服务器' from master.dbo.sysservers where srvname <> SERVERPROPERTY('servername')
(2)删除已建立的链接服务器(LinkServer)
EXEC master.dbo.sp_dropserver @server=N'172.XXX.XXX.XXX', @droplogins='droplogins'