MySQL Replication一主多从环境搭建

本文详细描述了MySQL Replication(1主2从）搭配MySQL-Router（8.0）中间件实现高可用方案，主要描述MySQL-Router中间件的安装与配置步骤，保证一次成功。

Master configuration Find the my.cnf file Configure under [mysqld] [mysqld] server-id=1 log-bin=master-bin   Restart the service and log in to mysql Create a user to obtain the log file. mysql> CREATE USER 'sree'@'%' IDENTIFIED BY 'sree' Grant relevant permissions (copy permissions) *.* represents all tables in all libraries mysql> grant replication slave on *.* to 'sree'@'%'   Refresh permissions mysql> flush privileges mysql> show master status; | File | Position | master-bin.000004 | 120                      Slave configuration ==================== Modify the configuration file: Configure under [mysqld] [mysqld] server-id=2 #As long as it is different from the above.   Then log in to mysql mysql>  CHANGE MASTER TO  　  MASTER_LOG_FILE='master-bin.000004 ', #above file        MASTER_LOG_POS = 120 ; #The above position        MASTER_HOST='192.168.249.130', #The ip address of the main library         MASTER_USER = 'sree',         MASTER_PASSWORD = 'sree',  Then start slave ============ mysql> show slave status\G; see: ===  Slave_IO_Running: Yes  Slave_SQL_Running: Yes It means that it was successful.     Errors in the whole process: Slave_IO_Running: Connecting 1. Mine is the wrong host ip. 2. There are still some firewalls on the Internet that are not turned off I use centos7 to turn off the firewall: systemctl stop firewalld 3. There is also a mistake in the above-mentioned secret.   Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs This error generally occur when we clone the master to slaver. Delete auto.cnf of mysql, and then restart the service.

MySQL Group Replication官方文档 MGR中文版--京东数据库技术部

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复制演示 建造 构建很容易： git clone mvn package 这将在target/replication-demo--bin.tar.gz生成二进制程序集。 分配 最简单的运行方法是构建二进制程序集，然后解压.tar.gz文件。 然后cd到bin目录，您将在其中找到几个脚本。 单机设置 您需要启动 2 个配置为作为单成员副本集运行的 MongoDB 实例： mongod --replSet east --port 27017 --dbpath /data/db2 --smallfiles mongod --replSet world --port 37017 --smallfiles 两个实例都启动后，通过 mongo shell 登录到每个实例并运行rs.initiate() 。 在您将本地 MongoDB 实例作为副本集运行后，初始化您的复制配置

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