SQLSERVER2016 无域控AlwaysOn 实施步骤

SQLSERVER2016 无域控AlwaysOn 实施步骤

步骤:

一、安装3windows server 2016系统

1)在3台机器建立具有administrators权限的相同账号密码,本例子直接使用administrator

2)分别修改计算机名称为 sqldb1,sqldb2,sqldb3

3)配置dns,如testag.com

4)3台服务器上做好hosts映射,如:

192.168.40.128 sqldb1

192.168.40.128 sqldb1.testag.com

 

192.168.40.129 sqldb2

192.168.40.129 sqldb2.testag.com

 

192.168.40.130 sqldb3

192.168.40.130 sqldb3.testag.com

 

192.168.40.100 testcluster

192.168.40.100 testcluster.testag.com

 

192.168.40.200 sqllistner

192.168.40.200 sqllistner.testag.com

 

二、配置故障转移群集

1)3台机器上分别安装故障转移群集;

2)建立故障转移群集 testcluster.testag.com

三、每台机器单独安装SQLSERVER 2016

1)3台机器上分别安装SQLSERVER2016,独立安装,非群集安装;

2)3台服务器的SQLSERVER配置相同的启动账号;

3)配置证书;

四、配置Alwayson

1)在另外2台辅助副本机器上恢复要加入alwayson的数据库;

2)SSMSGUI创建alwayson;注:我使用的SSMS按本会丢失两个关键语句,导致创建失败https://www.cnblogs.com/double-K/p/5994166.html 该博有说明,这两个语句是:

------------这部分代码是图形化工具中缺失的步骤


:Connect sqldb2

ALTER AVAILABILITY GROUP [sqldbag] JOIN;

Go

ALTER DATABASE [testdb2] SET HADR AVAILABILITY GROUP = [sqldbag];
GO

 

:Connect sqldb3

ALTER AVAILABILITY GROUP [sqldbag] JOIN;

GO

ALTER DATABASE [testdb2] SET HADR AVAILABILITY GROUP = [sqldbag];

GO

 

3)创建侦听器 sqllistner,做好hosts映射;

4)创建只读路由,让alwayson支持读写分离

 

ALTER AVAILABILITY GROUP sqldbag                                                     
MODIFY REPLICA ON N'sqldb1' WITH (SECONDARY_ROLE (ALLOW_CONNECTIONS = READ_ONLY));    
                                                 
ALTER AVAILABILITY GROUP sqldbag                                                    
MODIFY REPLICA ON N'sqldb1' WITH (SECONDARY_ROLE (READ_ONLY_ROUTING_URL = N'tcp://sqldb1.testag.com:1433'));                                                    



ALTER AVAILABILITY GROUP sqldbag                                                    
MODIFY REPLICA ON N'sqldb2' WITH (SECONDARY_ROLE (ALLOW_CONNECTIONS = READ_ONLY));                                                    

ALTER AVAILABILITY GROUP sqldbag                                                     
MODIFY REPLICA ON N'sqldb2' WITH (SECONDARY_ROLE (READ_ONLY_ROUTING_URL = N'tcp://sqldb2.testag.com:1433'));                                                     


ALTER AVAILABILITY GROUP sqldbag                                                    
MODIFY REPLICA ON N'sqldb3' WITH (SECONDARY_ROLE (ALLOW_CONNECTIONS = READ_ONLY));                                                    

ALTER AVAILABILITY GROUP sqldbag                                                     
MODIFY REPLICA ON N'sqldb3' WITH (SECONDARY_ROLE (READ_ONLY_ROUTING_URL = N'tcp://sqldb3.testag.com:1433'));                                                     



ALTER AVAILABILITY GROUP sqldbag                                                     
MODIFY REPLICA ON N'sqldb1' WITH (PRIMARY_ROLE (READ_ONLY_ROUTING_LIST=('sqldb2','sqldb3','sqldb1')));                                                     


ALTER AVAILABILITY GROUP sqldbag                                                     
MODIFY REPLICA ON N'sqldb2' WITH (PRIMARY_ROLE (READ_ONLY_ROUTING_LIST=('sqldb3','sqldb1','sqldb2')));                                                     


ALTER AVAILABILITY GROUP sqldbag                                                     
MODIFY REPLICA ON N'sqldb3' WITH (PRIMARY_ROLE (READ_ONLY_ROUTING_LIST=('sqldb2','sqldb1','sqldb3')));                                                     

 

 ssms要让只读路由生效,必须具备两点:

1)连接到制定数据库,而不是默认;

 

2)增加连接参数 ApplicationIntent=ReadOnly

 

 

 

参考文档:

https://www.cnblogs.com/double-K/p/5994166.html

http://www.cnblogs.com/lyhabc/p/6498712.html

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注意问题和事项:

1)所有sqlserver服务器创建相同密码的administrators权限的windows账号,用作sqlserver的启动账号,避免权限问题;

2)本人使用的ssms2016版本创建alwayson丢失语句,导致创建alwayson失败;

3)无域控,需要对所有资源做hosts映射,包含

     sqldb1, sqldb2, sqldb3,  sqldb1.testag.com,  sqldb2.testag.com,  sqldb3.testag.com, 

     群集服务器 testcluster.testag.com,

     侦听器 sqllistner, sqllistner.testag.com

4)忘记创建只读路由,通过侦听器无法连接到只读副本;

5)当alwayson的辅助副本中的 可读辅助副本 设置为 仅读意向 时,ssms无法打开数据库,需要配置 ApplicationIntent=ReadOnly 连接参数才可打开

 

posted @ 2018-12-24 15:12  鸽子飞扬  阅读(2449)  评论(1编辑  收藏  举报