MySQL5.7主从添加新从库的办法
发布时间：2022-01-19 09:48:18 所属栏目：MySql教程 来源：互联网
导读：本篇内容介绍了MySQL5.7主从添加新从库的方法的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！ MySQL 主从复制，不停机添加新从节点： 1、主库创建账号
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本篇内容介绍了“MySQL5.7主从添加新从库的方法”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！ MySQL 主从复制，不停机添加新从节点： 1、主库创建账号： 修改主库repl密码： show master status; alter user repl@'%' identified by '123456'; grant replication slave,replication client on *.* to 'repl'@'%'; flush privilegs; 2、从库配置（创建从库数据库过程简略）： 开启binlog [root@centos_TP data1]# cat /etc/my.cnf [mysqld] #datadir=/var/lib/mysql #socket=/var/lib/mysql/mysql.sock #user=mysql # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 basedir=/usr/local/mysql datadir=/data1/data socket=/tmp/mysql.sock port=3306 server-id =60182 replicate-wild-ignore-table=mysql.% replicate-wild-ignore-table=performance_schema.% replicate-wild-ignore-table=information_schema.% replicate-wild-ignore-table=sys.% log-bin = /data1/log/mysql-bin binlog_format = MIXED skip-slave-start = 1 expire_logs_days=3 #validate_password_policy=0 #validate_password_length=3 relay-log-index=/data1/log/mysql-relay relay-log=/data1/log/mysql-relay log-bin=/data1/log/mysql-bin #log-error=log.err explicit_defaults_for_timestamp=true [mysqld_safe] log-error=/data1/log/mysql.err pid-file=/data1/tmp/mysqld.pid 初始化数据库： 正常初始化： [root@centos_TP bin]# ./mysqld --defaults-file=/etc/my.cnf --initialize --user=mysql 2020-01-14T08:48:27.965207Z 0 [Warning] InnoDB: New log files created, LSN=45790 2020-01-14T08:48:28.175008Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2020-01-14T08:48:28.270192Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: a2408f8d-36aa-11ea-a1c6-00505695cefc. 2020-01-14T08:48:28.273709Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2020-01-14T08:48:28.278708Z 1 [Note] A temporary password is generated for root@localhost: (,%E6LnwWrrq 指定初始化配置文件： /usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf --initialize --user=mysql #开启数据库 /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf & #登录数据库，修改root密码 mysql -p 之前初始化的密码 set sql_log_bin=0; mysql> alter user root@'localhost' identified by '123456'; mysql>flush privileges; set sql_log_bin=1; 增加root远程登录用户： mysql> create user root@'%' identified by '123456'; Query OK, 0 rows affected (0.01 sec) mysql> grant all privileges on *.* to root@'%'; mysql> flush privileges; #创建slave账号 mysql> grant replication slave,replication client on *.* to 'repl'@'%' identified by '123456'; #在slave节点上执行 mysql> set global read_only=1; #由于从库随时会提升成主库，不能写在配置文件里。 （编辑：拼字网 - 核心网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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