mysql 主从设置

Posted 2020-11-11 欢迎来到快乐嘉年华的博客

Slave服务器的版本要等于或者高于master服务器

现在的实例是在mysql 5.7上的主从配置

a) master服务器的my.cnf配置，server_id 推荐用IP的后两位数字

[mysqld]
federated
port=50000
 basedir = /usr/local/mysql
 datadir = /usr/local/mysql/data
 server_id = 43209
log-bin=mysql-bin
expire_logs_days=3
binlog-do-db=dbname
binlog-ignore-db=mysql,information_schema
max_allowed_packet=500M
event_scheduler=1
max_connections=2000
character_set_server=utf8
init_connect=‘SET NAMES utf8‘
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[client]

b) master服务器授权一个可以数据同步的用户（这里的用户是slave,密码123456）

grant replication slave on *.* to ‘repl‘@‘%‘ identified by ‘123456‘;

c) master 服务器重启mysql

service mysqld restart

d) slave服务器的my.cnf配置

[mysqld]
federated
port=50000
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
server_id = 43210
log-bin=mysql-bin
expire_logs_days=3
binlog-do-db=dbname
binlog-ignore-db = mysql,information_schema
max_allowed_packet=500M
max_connections=2000
character_set_server=utf8
init_connect=‘SET NAMES utf8‘
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[client]
default-character-set=utf8

e) salve 服务器测试连接master的同步用户(slave)

mysql -hX.X.X.X -uslave -p123456

f) slave服务器重启

service mysqld restart

 

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1：在master服务器跑

mysqldump --master-data=2 --single-transaction -uroot -p dbname > /root/mysqldump.sql

2：把主服务器产生的mysqldump.sql 做gzip 压缩，上传到从服务器

gzip -9 /root/mysqldump.sql
scp /root/mysqldump.sql.gz root@X.X.X.X:/root/

3：在从服务器上source /root/mysqldump.sql

4：查看 mysqldump.sql中的MASTER_LOG_FILE和MASTER_LOG_POS信息

5：在从服务器运行stop slave，CHANGE MASTER TO master_host=‘192.X.X.X‘, MASTER_LOG_FILE=‘mysql-bin.000028‘, MASTER_LOG_POS=654560631, master_user=‘slave‘, master_password=‘123456‘, master_port=50000; 

6：在从服务器运行 start slave;

7：在从服务器运行show slave status; 查看Slave_IO_Running和Slave_SQL_Running 两列是否都为YES，如果都是YES就正常了