关于mysql:mysql主从配置

① 环境筹备

本地装置两个 mysql，或者应用虚拟机，或者应用 docker 装置，须要筹备两个 mysql，本文应用 docker 装置，具体装置办法详见
https://www.jianshu.com/p/10769f985516

环境
宿主机 centos7
mysql:5.6
mysql1(master): 172.17.0.3:3307
mysql2(slave): 172.17.0.2:3308

② mysql 配置文件配置

mysql1(master): 172.17.0.3 my.cnf 配置文件设置，mysql

#mysql master1 config 
[mysqld]
server-id = 1        # 节点 ID，确保惟一

# log config
log-bin = mysql-bin     #开启 mysql 的 binlog 日志性能
sync_binlog = 1         #管制数据库的 binlog 刷到磁盘下来 , 0 不管制，性能最好，1 每次事物提交都会刷到日志文件中，性能最差，最平安
binlog_format = mixed   #binlog 日志格局，mysql 默认采纳 statement，倡议应用 mixed
expire_logs_days = 7                           #binlog 过期清理工夫
max_binlog_size = 100m                    #binlog 每个日志文件大小
binlog_cache_size = 4m                        #binlog 缓存大小
max_binlog_cache_size= 512m              #最大 binlog 缓存大
binlog-ignore-db=mysql #不生成日志文件的数据库，多个疏忽数据库能够用逗号拼接，或者 复制这句话，写多行

auto-increment-offset = 1     # 自增值的偏移量
auto-increment-increment = 1  # 自增值的自增量
slave-skip-errors = all #跳过从库谬误

mysql2(slave): 172.17.0.2 mysql.cnf 配置

[mysqld]
server-id = 2
log-bin=mysql-bin
relay-log = mysql-relay-bin
replicate-wild-ignore-table=mysql.%
replicate-wild-ignore-table=test.%
replicate-wild-ignore-table=information_schema.%

重启两个 mysql，让配置失效

③ master 数据库，创立复制用户并受权

1. 进入 master 的数据库，为 master 创立复制用户

CREATE USER repl_user IDENTIFIED BY 'repl_passwd';

2. 赋予该用户复制的权力

grant replication slave on *.* to 'repl_user'@'172.17.0.2'  identified by 'repl_passwd';

FLUSH PRIVILEGES;

3. 查看 master 的状态

show master status;
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000005      120|              | mysql            |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

4, 配置从库

mysql> CHANGE MASTER TO 
MASTER_HOST = '172.17.0.3',  
MASTER_USER = 'repl_user', 
MASTER_PASSWORD = 'repl_passwd',
MASTER_PORT = 3307,
MASTER_LOG_FILE='mysql-bin.000005',
MASTER_LOG_POS=120,
MASTER_RETRY_COUNT = 60,
MASTER_HEARTBEAT_PERIOD = 10000; 

# MASTER_LOG_FILE='mysql-bin.000005',# 与主库 File 保持一致
# MASTER_LOG_POS=120 , #与主库 Position 保持一致

启动从库 slave 过程

mysql> start slave;
Query OK, 0 rows affected (0.04 sec)