CentOS 7.2 基于Docker实现MySQL主从架构
环境准备
硬件：IBM 3650 M4
系统：CentOS 7.2 64位
Docker版本：1.13
mysql版本：5.6
1.安装Docker(略）
2.加载mysql镜像
#官方mysql镜像
sudo docker pull mysql ###官方mysql镜像实际上是8.0.11，略坑，不推荐
###直接使用mysql5.6
sudo docker pull mysql5.63.添加主从数据库的配置文件
##新建目录和文件
sudo mkdir -p /usr/local/mysqlData/master/cnf
sudo mkdir -p /usr/local/mysqlData/master/data
sudo mkdir -p /usr/local/mysqlData/slave/cnf
sudo mkdir -p /usr/local/mysqlData/slave/data
sudo touch /usr/local/mysqlData/master/cnf/mysql.cnf
sudo touch /usr/local/mysqlData/slave/cnf/mysql.cnf编辑 /usr/local/mysqlData/master/cnf/mysql.cnf
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
symbolic-links=0
character-set-server = utf8
#skip-networking
innodb_print_all_deadlocks = 1
max_connections = 2000
max_connect_errors = 6000
open_files_limit = 65535
table_open_cache = 128
max_allowed_packet = 4M
binlog_cache_size = 1M
max_heap_table_size = 8M
tmp_table_size = 16M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
sort_buffer_size = 8M
join_buffer_size = 28M
key_buffer_size = 4M
thread_cache_size = 8
query_cache_type = 1
query_cache_size = 8M
query_cache_limit = 2M
ft_min_word_len = 4
log-bin = mysql-bin
server-id = 1
binlog_format = mixed
performance_schema = 0
explicit_defaults_for_timestamp
#lower_case_table_names = 1
interactive_timeout = 28800
wait_timeout = 28800
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER,STRICT_TRANS_TABLES
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M编辑/usr/local/mysqlData/slave/cnf/mysql.cnf
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
symbolic-links=0
character-set-server = utf8
#skip-networking
innodb_print_all_deadlocks = 1
max_connections = 2000
max_connect_errors = 6000
open_files_limit = 65535
table_open_cache = 128
max_allowed_packet = 4M
binlog_cache_size = 1M
max_heap_table_size = 8M
tmp_table_size = 16M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
sort_buffer_size = 8M
join_buffer_size = 28M
key_buffer_size = 4M
thread_cache_size = 8
query_cache_type = 1
query_cache_size = 8M
query_cache_limit = 2M
ft_min_word_len = 4
log-bin = mysql-bin
server-id = 2
binlog_format = mixed
performance_schema = 0
explicit_defaults_for_timestamp
#lower_case_table_names = 1
interactive_timeout = 28800
wait_timeout = 28800
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER,STRICT_TRANS_TABLES
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M4.启用master和slave容器
##master容器启用
sudo docker run -itd -p 3307:3306 --name master -v /usr/local/mysqlData/master/cnf:/etc/mysql/conf.d -v /usr/local/mysqlData/master/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:5.6
##进入master容器
sudo docker exec -it master /bin/bash
root@ebc7017a58ef:/#
##slave容器启用
sudo docker run -itd -p 3308:3306 --name slave -v /usr/local/mysqlData/slave/cnf:/etc/mysql/conf.d -v /usr/local/mysqlData/slave/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:5.6
root@ee3bb51b4d14:/#5.数据库开启远程访问
##防火墙设置允许端口访问
sudo firewall-cmd --add-port=3307/tcp --permanent
sudo firewall-cdm --add-port=3308/tcp --permanent
sudo firewall-cmd --reload
##设置master数据库访问权限
root@ebc7017a58ef:/# mysql -uroot -p123456
mysql>grant all privileges on *.* to reader@'%' identified by 'readerpwd' with grant option;
Query OK, 0 rows affected (0.01 sec)
mysql>flush privileges;
Query OK, 0 rows affected (0.01 sec)
##设置slave数据库访问权限
root@ee3bb51b4d14:/# mysql -uroot -p123456
mysql>grant all privileges on *.* to slave@'%' identified by 'slavepwd' with grant option;
Query OK, 0 rows affected (0.01 sec)
mysql>flush privileges;
Query OK, 0 rows affected (0.01 sec)6.设置主从同步
##登录master数据库查看master状态
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 | 204 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql>
其中mysql-bin.000002为日志文件，后面会用到
##配置slave
mysql> change master to master_host='172.17.0.6',master_user='reader',master_password='readerpwd',master_log_file='mysql-bin.000002',master_log_pos=501;
##参数说明
master_host，master数据库的ip地址
master_user，连接master数据库的用户名
master_password，master_user的密码
master_log_file，日志文件，上一步中，master status对应的文件
##启动slave,slave的操作有几个，start,stop和restart
mysql> start slave;
##查看slave状态
mysql> show slave status;
