MYSQL5.7下搭建Orchestrator

环境说明

在主机1,主机2,主机3上安装MySQL服务端和客户端。

 

 

主机1

主机2

主机3

操作系统

CentOS7.4

CentOS7.4

CentOS7.4

主机名

mydb1

mydb2

mydb3

IP

192.168.1.101

192.168.1.102

192.168.1.103

角色

拓扑库

3306主,3307

3306从,3307主,3308

Orchestrator

Orchestrator

Orchestrator

数据库软件版本

mysql5.7.22

mysql5.7.22

mysql5.7.22

MySQL配置文件

/app/mysqldata/3306/ my.cnf

/app/mysqldata/3306/ my.cnf

/app/mysqldata/3306/ my.cnf

Orchestrator配置文件

/usr/local/orchestrator/orchestrator.conf.json

/usr/local/orchestrator/orchestrator.conf.json

/usr/local/orchestrator/orchestrator.conf.json

Orchestrator安装包

orchestrator-3.0.11-1.x86_64.rpm

orchestrator-client-3.0.11-1.x86_64.rpm

orchestrator-3.0.11-1.x86_64.rpm

orchestrator-client-3.0.11-1.x86_64.rpm

orchestrator-3.0.11-1.x86_64.rpm

orchestrator-client-3.0.11-1.x86_64.rpm

 

一. 主从复制配置

Install_CentOS7_MySQL57_multi_instance.sh

MySQL5.7-GTID-mysqldump,xtrabackup搭建.txt

大规模插入数据.txt

做成快照Orchestrator

 

.开始配置Orchestrator

mydb1上操作

https://github.com/github/orchestrator/releases/download/v3.0.11/orchestrator-3.0.11-1.x86_64.rpm

https://github.com/github/orchestrator/releases/download/v3.0.11/orchestrator-client-3.0.11-1.x86_64.rpm

 

安装:

# rpm -ivh orchestrator-3.0.11-1.x86_64.rpm

# rpm -ivh orchestrator-client-3.0.11-1.x86_64.rpm

安装完成后,目录在/usr/local/orchestrator

 

MySQL配置文件加一个report_host参数,report_host为只读参数,必须重启才可生效

report_host=192.168.1.102 //ip为自身的ip

说明:不加report_host show slave hosts 不会显示host,会导致程序报错的

"DiscoverByShowSlaveHosts": false 也可以,这样就不需要设置report_host

 

拓扑库上

CREATE DATABASE IF NOT EXISTS orchestrator;

GRANT ALL PRIVILEGES ON `orchestrator`.* TO 'orche'@'192.168.1.%' IDENTIFIED BY 'msds007';

mydb2,mydb3上操作

主从复制上,33063307上分别操作

GRANT SUPER, PROCESS, REPLICATION SLAVE, RELOAD ON *.* TO 'orche'@'192.168.1.%' IDENTIFIED BY 'msds007';

GRANT SELECT ON mysql.slave_master_info TO 'orche'@'192.168.1.%';

mydb1上操作

配置文件

# cd /usr/local/orchestrator/

# cp orchestrator-sample.conf.json orchestrator.conf.json

"MySQLTopologyUser": "orche",

"MySQLTopologyPassword": "msds007",

  "MySQLOrchestratorHost": "192.168.1.101",

  "MySQLOrchestratorPort": 3306,

  "MySQLOrchestratorDatabase": "orchestrator",

  "MySQLOrchestratorUser": "orche",

  "MySQLOrchestratorPassword": "msds007",

 

启动orchestrator

# cd /usr/local/orchestrator/

# ./orchestrator --debug http &

 

发现实例

# ./orchestrator -c discover -i mydb2:3306

# ./orchestrator -c discover -i mydb3:3306

# ./orchestrator -c discover -i mydb3:3307

# ./orchestrator -c discover -i mydb2:3307

# ./orchestrator -c discover -i mydb3:3308

# ./orchestrator -c clusters

Web页面:http://192.168.1.101:3000

 orchestrator

 orchestrator

 orchestrator

 

打印拓扑树

# ./orchestrator -c topology -i mydb2:3306

# ./orchestrator -c topology -i mydb3:3307

 

使用relocate移动一个副本,如:有A-B-C可以变为 A-BA-C

# ./orchestrator -c relocate -i mydb3:3308 -d mydb2:3307

# ./orchestrator -c relocate -i mydb3:3308 -d mydb3:3307

 

使实例只读或者只写

# ./orchestrator -c set-read-only -i mydb2:3307

# ./orchestrator -c set-writeable -i mydb2:3307

 

Start/stop slave

# ./orchestrator -c stop-slave -i mydb3:3308

# ./orchestrator -c start-slave -i mydb3:3308

 

配置orchestrator-client(mydb1,mydb2,mydb3都可)

配置环境

# export ORCHESTRATOR_API=http://192.168.1.101:3000/api

 

linux下安装json解析工具jq

# wget https://github.com/stedolan/jq/releases/download/jq-1.5/jq-1.5.tar.gz

# tar zxvf jq-1.5.tar.gz

# cd jq-1.5

# ./configure && make && make install

 

基础命令

# orchestrator-client -c help

# orchestrator-client -c which-api

# orchestrator-client -c clusters

# orchestrator-client -c all-clusters-masters

# orchestrator-client -c all-instances

# orchestrator-client -c api -path clusters

# orchestrator-client -c api -path leader-check

故障转移

不管主库是否正常,强制主从切换,-i指定集群中任一实例,-d 指定新主库, 注意切换后旧主库不会指向新主库,需要手动操作

# orchestrator-client -c force-master-takeover -i mydb2:3306 -d mydb3:3306

 

主从切换,旧主库会指向新主库,但是复制线程是停止的,需要人工手动执行start slave,恢复复制。

# orchestrator-client -c graceful-master-takeover -i mydb2:3306 -d mydb3:3306

自动故障切换

Orchestrator能够配置成自动检测主库故障,并完成故障切换。

http方式启动后台Web服务

./orchestrator --config=./orchestrator.conf.json --debug http &

成功启动后,可通过浏览器访问Web页面:

http://192.168.1.101:3000

参数配置

"RecoverMasterClusterFilters": ["*"],

"RecoverIntermediateMasterClusterFilters": ["*"],

"FailureDetectionPeriodBlockMinutes": 60,

"RecoveryPeriodBlockSeconds": 3600

RecoverMasterClusterFilters RecoverIntermediateMasterClusterFilters 必须配置为["*"],否则自动切换不会触发。

FailureDetectionPeriodBlockMinutes RecoveryPeriodBlockSeconds 参数默认值为1个小时,也就是如果发生了故障切换,在1个小时之内,该主库再次出现故障,将不会被监测到,也不会触发故障切换。

 

.高可用Orchestrator

Orchestrator多节点部署,通过raft一致性协议实现自身高可用。

例如在如下3台机器部署Orchestrator节点:

192.168.1.101

192.168.1.102

192.168.1.103                                                                                                                                                                                               

 

在每个节点上修改orchestrator.conf.json配置文件:

"RaftEnabled": true,

"RaftDataDir": "/var/lib/orchestrator",

"RaftBind": "192.168.1.101",

"DefaultRaftPort": 10008,

"RaftNodes": [ "192.168.1.101", "192.168.1.102", "192.168.1.103" ],

 

RaftBind配置为当前节点ip,在每个节点上启动orchestrator服务:

./orchestrator --config=./orchestrator.conf.json --debug http

 

在浏览器中访问:

http://192.168.1.101:3000/api/leader-check

返回 "OK",当前leader192.168.1.101

http://192.168.1.101:3000/api/raft-health

返回 "healthy"

http://192.168.1.102:3000/api/leader-check

返回 "Not leader"

http://192.168.1.102:3000/api/raft-health

返回 "healthy"

关闭192.168.1.101节点上的orchestrator服务,leader自动切换到192.168.1.102或者192.168.1.103,如果192.168.1.101重新启动后,加入集群,它将作为follower

 

 

 

https://segmentfault.com/u/lindaling   可以学很多东西

https://segmentfault.com/a/1190000017838535    很重要

https://riverdba.github.io/            可以学很多东西

https://riverdba.github.io/2019/03/19/orchestrator/  

https://www.jianshu.com/p/62e95a131028      很重要

https://github.com/outbrain/orchestrator/wiki/Orchestrator-Manual 

https://www.cnblogs.com/zhoujinyi/p/10387581.html 

https://www.cnblogs.com/zhoujinyi/p/10394389.html 

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