[toc]mysql
Orchestrator是一款開源,對MySQL複製提供高可用、拓撲的可視化管理工具,採用go語言編寫,它可以主動發現當前拓撲結構和主從複製狀態,支持MySQL主從複製拓撲關係的調整、支持MySQL主庫故障自動切換(failover)、手動主從切換(switchover)等功能。git
Orchestrator後臺依賴於MySQL或者SQLite存儲元數據,可以提供Web界面展現MySQL集羣的拓撲關係及實例狀態,經過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。Orchestrator 對MySQL主庫的故障切換分爲自動切換和手動切換。手動切換又分爲recover、force-master-failover、force-master-takeover以及graceful-master-takeover。github
相比於MHA,Orchestrator更加偏重於複製拓撲關係的管理,可以實現MySQL任一複製拓撲關係的調整,並在此基礎上,實現MySQL高可用。另外,Orchestrator自身也能夠部署多個節點,經過raft分佈式一致性協議,保證自身的高可用。web
Orchestrator主要有如下幾個特徵:面試
Orchestrator的GitHub地址:sql
https://github.com/openark/orchestratordocker
https://github.com/outbrain/orchestrator/wiki/Orchestrator-Manual數據庫
https://github.com/github/orchestrator/tree/master/docsjson
Orchestrator的全部參數:後端
https://github.com/github/orchestrator/blob/master/go/config/config.go
官方建議的生產配置示例:
https://github.com/github/orchestrator/blob/master/docs/configuration-sample.md
-- 拉取小麥苗的鏡像 docker pull registry.cn-hangzhou.aliyuncs.com/lhrbest/lhrorchestrator:1.0 -- 建立容器 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 -- 啓動後端存儲MySQL庫 systemctl status mysqld MySQL用戶名和密碼:root/lhr -- 啓動orchestrator systemctl start orchestrator systemctl status orchestrator -- web訪問: http://192.168.66.35:3000 用戶名和密碼:lhr/lhr -- 日誌: tailf /var/log/messages -- 參數文件 /usr/local/orchestrator/orchestrator.conf.json
web界面以下所示:
把配置好的複製實例加入到orchestrator,由於orch能夠自動發現整個拓撲的全部實例,因此只須要添加任意一臺實例便可。
這裏,我有一套1主2從的環境,拓撲圖以下所示:
[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orchestrator中:
添加成功。
咱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Discover操做,添加完成後,刷新頁面以下:
修改完成後,刷新頁面:
注意:集羣別名不支持中文。
手動修改主從關係:
要實現自動failover,須要修改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羣能夠自動failover和recover。
自動failover以前:
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,新主庫變爲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,邊框爲黑色:
接下來啓動172.72.0.2,啓動完成後:
須要咱們手動加入集羣:
[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:
能夠看到,又回到了一主2從的環境。
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