MySQL 雙向備份的實現(xiàn)方法

[mysqld]
# 服務(wù)器唯一標(biāo)識
server-id=1
# 二進(jìn)制日志文件名
log-bin=mysql-bin

# 需要備份的數(shù)據(jù)庫，多個數(shù)據(jù)庫用 , 分隔
binlog-do-db=piumnl
# 需要復(fù)制的數(shù)據(jù)庫，多個數(shù)據(jù)庫用 , 分隔
replicate-do-db=piumnl
# 中繼日志文件名
relay_log=mysqld-relay-bin
# 手動啟動同步服務(wù)，避免突然宕機(jī)導(dǎo)致的數(shù)據(jù)日志不同步
skip-slave-start=ON
# 互為主從需要加入這一行
log-slave-updates=ON
# 禁用符號鏈接，防止安全風(fēng)險，可不加
symbolic-links=0

# 可不加
# resolve - [Warning] Slave SQL: If a crash happens this configuration does not guarantee that the relay log info will be consistent, Error_code: 0
master-info-repository=table
relay-log-info-repository=table
relay-log-recovery=1

# 可不加
# 禁用 dns 解析，會使授權(quán)時使用的域名無效
skip-host-cache
skip-name-resolve

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

# 不再解釋各個配置項
[mysqld]
server-id=2
log-bin=mysql-bin

binlog-do-db=piumnl
replicate-do-db=piumnl
relay_log=mysql-relay-bin
skip-slave-start=ON
log-slave-updates=ON
symbolic-links=0

# resolve - [Warning] Slave SQL: If a crash happens this configuration does not guarantee that the relay log info will be consistent, Error_code: 0
master-info-repository=table
relay-log-info-repository=table
relay-log-recovery=1

skip-host-cache
skip-name-resolve

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

create user 'rep'@'%' identified by 'rep';  # 創(chuàng)建一個賬戶
grant replication slave on *.* to 'rep'@'%'; # 授予該賬戶對任意數(shù)據(jù)庫任意表的主從備份權(quán)限

show master status\G;
# 此處需要關(guān)注 File 和 Position 值

# master_log_file 就是第一步操作的 File 值
# master_log_pos 就是第一步操作的 Position 值
change master to master_host=<master_hostname>, master_user=<rep_username>, master_port=<master_port>, master_password=<rep_password>, master_log_file='mysql-log.000003', master_log_pos=154;
start slave;

show slave status\G;
# 查看最重要的兩項，兩個都必須為 Yes ，有一個為 No 都要去查看錯誤日志文件，看看什么地方存在問題
# Slave_IO_Running: Yes
# Slave_SQL_Running: Yes

stop slave;
flush logs;
start slave;

# 進(jìn)行如下操作重置
# 如果二進(jìn)制日志或中繼日志有其他作用，請勿進(jìn)行如下操作
reset master;
reset slave;
flush logs;