SQLSERVER2016 無域控AlwaysOn 實施步驟

步驟：

一、安裝3個windows server 2016系統

1）在3台機器建立具有administrators權限的相同賬號密碼，本例子直接使用administrator；

2）分別修改計算機名稱為 sqldb1,sqldb2,sqldb3；

3）配置dns，如testag.com；

4）在3台服務器上做好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、配置故障轉移群集

1）在3台機器上分別安裝故障轉移群集；

2）建立故障轉移群集 testcluster.testag.com；

三、每台機器單獨安裝SQLSERVER 2016

1）在3台機器上分別安裝SQLSERVER2016，獨立安裝，非群集安裝；

2）給3台服務器的SQLSERVER配置相同的啟動賬號；

3）配置證書；

四、配置Alwayson

1）在另外2台輔助副本機器上恢復要加入alwayson的數據庫；

2）用SSMS的GUI創建alwayson；注：我使用的SSMS按本會丟失兩個關鍵語句，導致創建失敗，https://www.cnblogs.com/double-K/p/5994166.html 該博有說明，這兩個語句是：

------------這部分代碼是圖形化工具中缺失的步驟

:Connect sqldb2

ALTER AVAILABILITY GROUP [sqldbag] JOIN;

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

:Connect sqldb3

ALTER AVAILABILITY GROUP [sqldbag] JOIN;

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

3）創建偵聽器 sqllistner，做好hosts映射；

4）創建只讀路由，讓alwayson支持讀寫分離；

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')));