知方可补不足~SQL数据库用户的克隆，SQL集群的用户同步问题

我们知道在为sqlserver建立功能数据库时，通过会为库再建立一个登陆名，而这个登陆名时，只用来管理这个数据库，这是安全的，正确的。

我们在建立一个用户时，通过会把指定的数据库添加到“用户映射”里，这时你的用户与数据库就有了关系，在使用用户登陆时，你只能看到与该用户有映射关系的数据库！

在SQL的集群环境下，假设你有两台服务器，它们之间建立集群，这时，你希望把A服务器的数据库用户同步到B服务器上，你当然可以手动在B上建立一个SQL用户，但这时，你也必须重新建立一个数据库的映射关系，因为这时用户名的SID已经不同了，如果希望在建立用户时同时绑定之前的数据库映射，我们需要使用下载的语句实现

CREATE PROCEDURE #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
GO

DECLARE @name sysname
DECLARE @type varchar (1)
DECLARE @hasaccess int
DECLARE @denylogin int
DECLARE @is_disabled int
DECLARE @PWD_varbinary  varbinary (256)
DECLARE @PWD_string  varchar (514)
DECLARE @Principal_id int
DECLARE @SID_varbinary varbinary (85)
DECLARE @SID_string varchar (514)
DECLARE @tmpstr  varchar (1024)
DECLARE @is_policy_checked varchar (3)
DECLARE @is_expiration_checked varchar (3)
DECLARE @defaultdb sysname
DECLARE @language sysname
DECLARE @rolename sysname
DECLARE login_curs CURSOR FOR SELECT
p.principal_id,
p.sid,
p.name,
p.type,
p.is_disabled,
p.default_database_name,
p.default_language_name,
l.hasaccess,
l.denylogin
FROM
sys.server_principals p
LEFT JOIN
sys.syslogins l ON ( l.name = p.name )
WHERE
p.type IN ( ‘S‘, ‘G‘, ‘U‘ ) AND
p.name <> ‘sa‘

OPEN login_curs

FETCH NEXT FROM login_curs INTO @Principal_id, @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @language, @hasaccess, @denylogin
IF (@@fetch_status = -1)
BEGIN
  PRINT ‘No login(s) found.‘
  CLOSE login_curs
  DEALLOCATE login_curs
  RETURN
END
SET @tmpstr = ‘** Generated ‘ + CONVERT (varchar, GETDATE()) + ‘ on ‘ + @@SERVERNAME + ‘ */‘
PRINT @tmpstr
PRINT ‘‘
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
PRINT ‘‘
SET @tmpstr = ‘-- Login: ‘ + @name
PRINT @tmpstr
IF (@type IN ( ‘G‘, ‘U‘))
BEGIN -- NT authenticated account/group
SET @tmpstr = ‘CREATE LOGIN ‘ + QUOTENAME( @name ) + ‘ FROM WINDOWS WITH DEFAULT_DATABASE = [‘ + @defaultdb + ‘], DEFAULT_LANGUAGE = [‘ + @language + ‘]‘
END
ELSE
BEGIN -- SQL Server authentication
-- obtain password and sid
            SET @PWD_varbinary = CAST( LOGINPROPERTY( @name, ‘PasswordHash‘ ) AS varbinary (256) )
EXEC #sp_hexadecimal @PWD_varbinary, @PWD_string OUT
EXEC #sp_hexadecimal @SID_varbinary,@SID_string OUT

-- obtain password policy state
SELECT @is_policy_checked = CASE is_policy_checked WHEN 1 THEN ‘ON‘ WHEN 0 THEN ‘OFF‘ ELSE NULL END FROM sys.sql_logins WHERE name = @name
SELECT @is_expiration_checked = CASE is_expiration_checked WHEN 1 THEN ‘ON‘ WHEN 0 THEN ‘OFF‘ ELSE NULL END FROM sys.sql_logins WHERE name = @name

            SET @tmpstr = ‘CREATE LOGIN ‘ + QUOTENAME( @name ) + ‘ WITH PASSWORD = ‘ + @PWD_string + ‘ HASHED, SID = ‘ + @SID_string + ‘, DEFAULT_DATABASE = [‘ + @defaultdb + ‘], DEFAULT_LANGUAGE = [‘ + @language + ‘]‘

IF ( @is_policy_checked IS NOT NULL )
BEGIN
SET @tmpstr = @tmpstr + ‘, CHECK_POLICY = ‘ + @is_policy_checked
END
IF ( @is_expiration_checked IS NOT NULL )
BEGIN
SET @tmpstr = @tmpstr + ‘, CHECK_EXPIRATION = ‘ + @is_expiration_checked
END
END
IF (@denylogin = 1)
BEGIN -- login is denied access
SET @tmpstr = @tmpstr + ‘; DENY CONNECT SQL TO ‘ + QUOTENAME( @name )
END
ELSE IF (@hasaccess = 0)
BEGIN -- login exists but does not have access
SET @tmpstr = @tmpstr + ‘; REVOKE CONNECT SQL TO ‘ + QUOTENAME( @name )
END
IF (@is_disabled = 1)
BEGIN -- login is disabled
SET @tmpstr = @tmpstr + ‘; ALTER LOGIN ‘ + QUOTENAME( @name ) + ‘ DISABLE‘
END
PRINT @tmpstr
PRINT ‘GO‘
DECLARE server_role_members_curs CURSOR FOR
SELECT
(SELECT [name] FROM sys.server_principals WHERE principal_id = role_principal_id) AS rolename
FROM
sys.server_role_members
WHERE
member_principal_id = @Principal_id
OPEN server_role_members_curs

FETCH NEXT FROM server_role_members_curs INTO @rolename
WHILE (@@fetch_status <> -1)
BEGIN
SELECT @tmpstr = ‘EXEC master..sp_addsrvrolemember @loginame = N‘‘‘ + @name + ‘‘‘, @rolename = N‘‘‘ + @rolename + ‘‘‘‘
PRINT @tmpstr
PRINT ‘GO‘
FETCH NEXT FROM server_role_members_curs INTO @rolename
END
CLOSE server_role_members_curs
DEALLOCATE server_role_members_curs
END
FETCH NEXT FROM login_curs INTO @Principal_id, @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @language, @hasaccess, @denylogin
END
CLOSE login_curs
DEALLOCATE login_curs
GO

DROP PROCEDURE #sp_hexadecimal
GO

运行的结果可能是这样的

然后我们把希望同步的用户登陆名复制到B服务器，运行脚本，即可完成同步！