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一、簡介
是一款開源,對MySQL復制提供高可用、拓撲的可視化管理工具,采用go語言編寫,它能夠主動發現當前拓撲結構和主從復制狀態,支持MySQL主從復制拓撲關系的調整、支持MySQL主庫故障自動切換()、手動主從切換()等功能。
后臺依賴于MySQL或者存儲元數據,能夠提供Web界面展示MySQL集群的拓撲關系及實例狀態mysql集群高可用方式有哪些,通過Web界面可更改MySQL實例的部分配置信息,同時也提供命令行和api接口,以便更加靈活的自動化運維管理。 對MySQL主庫的故障切換分為自動切換和手動切換。手動切換又分為、force--、force--以及--。
相比于MHA,更加偏重于復制拓撲關系的管理,能夠實現MySQL任一復制拓撲關系的調整,并在此基礎上,實現MySQL高可用。另外,自身也可以部署多個節點,通過raft分布式一致性協議,保證自身的高可用。
主要有以下幾個特征:
的地址:
的所有參數:
官方建議的生產配置示例:
二、快速搭建環境
-- 拉取小麥苗的鏡像 docker pull registry.cn-hangzhou.aliyuncs.com/lhrbest/lhrorchestrator:1.0 -- 創建容器 docker run -d --name lhrorchestrator -h lhrorchestrator \ -p 233:22 -p 3087:3389 -p 3000:3000 \ --privileged=true lhrbest/lhrorchestrator:1.0 \ /usr/sbin/init -- 進入容器 docker exec -it lhrorchestrator bash -- 啟動后端存儲MySQL庫 systemctl status mysqld MySQL用戶名和密碼:root/lhr -- 啟動orchestrator systemctl start orchestrator systemctl status orchestrator -- web訪問: http://192.168.66.35:3000 用戶名和密碼:lhr/lhr-- 日志: tailf /var/log/messages -- 參數文件 /usr/local/orchestrator/orchestrator.conf.json
web界面如下所示:
三、添加主從環境
把配置好的復制實例加入到,因為orch可以自動發現整個拓撲的所有實例mysql集群高可用方式有哪些,所以只需要添加任意一臺實例即可。
這里,我有一套1主2從的環境,拓撲圖如下所示:
[root@docker35 log]# mysqlrplshow --master=root:lhr@172.72.0.2:3306 --discover-slaves-login=root:lhr --verbose WARNING: Using a password on the command line interface can be insecure. # master on 172.72.0.2: ... connected. # Finding slaves for master: 172.72.0.2:3306 # Replication Topology Graph 172.72.0.2:3306 (MASTER) | +--- 172.72.0.3:3306 [IO: Yes, SQL: Yes] - (SLAVE) | +--- 172.72.0.4:3306 [IO: Yes, SQL: Yes] - (SLAVE)
下面開始把這套環境添加到中:
添加成功。
我們再添加一套雙主雙從的環境:
選擇任意一臺MySQL服務器進行操作,添加完成后,刷新頁面如下:
四、修改集群別名
修改完成后,刷新頁面:
注意:集群別名不支持中文。
五、拖動界面修改主從關系
手動修改主從關系:
六、自動
要實現自動,需要修改2個參數:
[root@lhrorchestrator orchestrator]# more orchestrator.conf.json | grep ClusterFilters "RecoverMasterClusterFilters": ["*"], "RecoverIntermediateMasterClusterFilters": ["*"],
這2個參數表示定義哪些集群可以自動和。
自動之前:
宕掉主庫:
[root@lhrorchestrator /]# mysql -uroot -plhr -h172.72.0.2 -P3306 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 11357 Server version: 5.7.30-log MySQL Community Server (GPL) Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> shutdown ; Query OK, 0 rows affected (0.00 sec)
刷新頁面:
172.72.0.2自動被剔除,新主庫變為172.72.0.3。
172.72.0.4指向了新的主庫172.72.0.3。
172.72.0.2已宕機,邊框為黑色:
接下來啟動172.72.0.2,啟動完成后:
需要我們手動加入集群:
[root@docker35 log]# mysql -uroot -plhr -h172.72.0.2 -P3306 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 13 Server version: 5.7.30-log MySQL Community Server (GPL) Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show slave hosts; Empty set (0.00 sec) mysql> show slave status; Empty set (0.00 sec) mysql> change master to -> master_host='172.72.0.3', -> master_port=3306, -> master_user='repl', -> master_password='lhr', -> master_auto_position=1; show slave status \G; Query OK, 0 rows affected, 1 warning (0.02 sec) mysql> mysql> start slave;Query OK, 0 rows affected (0.01 sec) mysql> show slave status \G; *************************** 1. row *************************** Slave_IO_State: Checking master version Master_Host: 172.72.0.3 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: Read_Master_Log_Pos: 4 Relay_Log_File: master-relay-bin.000001 Relay_Log_Pos: 4 Relay_Master_Log_File: Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 0 Relay_Log_Space: 154 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher:
Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 0 Master_UUID: Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: bacfcde8-69dc-11eb-b240-0242ac480002:1-70574, bc6d26f0-69dc-11eb-bfa7-0242ac480003:1-5 Auto_Position: 1 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 1 row in set (0.00 sec) ERROR: No query specified mysql>
刷新頁面:
可以看到,又回到了一主2從的環境。
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