docker-compose启动mysql双机热备互为主从
1、环境准备
| IP地址 | 名称 |
| 192.168.123.78 | mysql-m |
| 192.168.123.82 | mysql-s |
2、安装mysql-m（192.168.123.78）
创建M主节点，通过下面的docker编排配置创建响应的目录和文件，目录下边创建 docker-compose.yml和my.cnf文件
docker-compose.yml
version: '3.5'
services:
mysql:
image: mysql:8.0.26
restart: always
privileged: True
container_name: mysql
volumes:
- ./mysql/data:/var/lib/mysql
- ./mysql/conf:/etc/mysql/conf.d
- ./mysql/logs:/logs
command:
--character-set-server=utf8mb4
--collation-server=utf8mb4_general_ci
--explicit_defaults_for_timestamp=true
environment:
MYSQL_ROOT_PASSWORD: "123456"
MYSQL_USER: "youxuan"
MYSQL_PASSWORD: "123456"
MYSQL_INITDB_SKIP_TZINFO: "Asia/Shanghai"
ports:
- 3306:3306
network_mode: host
my.cnf
###### [mysql]配置模块 ######
[mysql]
# 设置MySQL客户端默认字符集
default-character-set=utf8mb4
socket=/var/lib/mysql/mysql.sock
###### [mysqld]配置模块 ######
[mysqld]
port=3306
user=mysql
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# MySQL8 的密码认证插件
default_authentication_plugin=mysql_native_password
# 禁用符号链接以防止各种安全风险
symbolic-links=0
# 允许最大连接数
max_connections=1000
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8mb4
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
# 表名存储在磁盘是小写的，但是比较的时候是不区分大小写
lower_case_table_names=0
max_allowed_packet=16M
# 设置时区
default-time_zone='+8:00'
# binlog 配置
binlog_format="ROW"
log-bin = /var/lib/mysql/mysql-bin
expire-logs-days = 90
max-binlog-size = 500M
# server-id 配置
server-id = 1
###### [client]配置模块 ######
[client]
default-character-set=utf8mb43、安装mysql-m（192.168.123.82）
创建S节点，通过下面的docker编排配置创建响应的目录和文件，目录下边创建 docker-compose.yml和my.cnf文件
docker-compose.yml
version: '3.5'
services:
mysql:
image: mysql:8.0.26
restart: always
privileged: True
container_name: mysql
volumes:
- ./mysql/data:/var/lib/mysql
- ./mysql/conf:/etc/mysql/conf.d
- ./mysql/logs:/logs
command:
--character-set-server=utf8mb4
--collation-server=utf8mb4_general_ci
--explicit_defaults_for_timestamp=true
environment:
MYSQL_ROOT_PASSWORD: "123456"
MYSQL_USER: "youxuan"
MYSQL_PASSWORD: "123456"
MYSQL_INITDB_SKIP_TZINFO: "Asia/Shanghai"
ports:
- 3306:3306
network_mode: host
my.cnf
###### [mysql]配置模块 ######
[mysql]
# 设置MySQL客户端默认字符集
default-character-set=utf8mb4
socket=/var/lib/mysql/mysql.sock
###### [mysqld]配置模块 ######
[mysqld]
port=3306
user=mysql
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# MySQL8 的密码认证插件
default_authentication_plugin=mysql_native_password
# 禁用符号链接以防止各种安全风险
symbolic-links=0
# 允许最大连接数
max_connections=1000
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8mb4
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
# 表名存储在磁盘是小写的，但是比较的时候是不区分大小写
lower_case_table_names=0
max_allowed_packet=16M
# 设置时区
default-time_zone='+8:00'
# binlog 配置
binlog_format="ROW"
log-bin = /var/lib/mysql/mysql-bin
expire-logs-days = 90
max-binlog-size = 500M
# server-id 配置
server-id = 2
###### [client]配置模块 ######
[client]
default-character-set=utf8mb44、启动主备
docker-compose up -d
5、配置主从同步
登录192.168.123.78操作
[root@node1 mysql]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
badaf8b53ced mysql:8.0.26 "docker-entrypoint.s…" 25 minutes ago Up 17 minutes mysql
[root@node1 mysql]# docker exec -it mysql /bin/bash
root@node1:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.26 MySQL Community Server - GPL
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000005 | 156 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
登录192.168.123.82操作
[root@node2 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f268cd67cbba mysql:8.0.26 "docker-entrypoint.s…" 23 minutes ago Up 23 minutes mysql
[root@node2 ~]# docker exec -it mysql /bin/bash
root@node2:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.26 MySQL Community Server - GPL
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000003 | 156 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
6、配置主从同步
根据mysql-s 的master 状态拼接mysql-m 设置 slave的命令：（配置82为主节点）
mysql> CHANGE MASTER TO master_host = '192.168.123.82',
-> master_port = 3306,
-> master_user = 'root',
-> master_password = '123456',
-> master_log_file = 'mysql-bin.000003',
-> master_log_pos = 156;
Query OK, 0 rows affected, 9 warnings (0.05 sec)
mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
根据mysql-m 的master 状态拼接mysql-s 设置 slave的命令：（配置78为主节点）
mysql> CHANGE MASTER TO master_host = '192.168.123.78',
-> master_port = 3306,
-> master_user = 'root',
-> master_password = '123456',
-> master_log_file = 'mysql-bin.000005',
-> master_log_pos = 156;
Query OK, 0 rows affected, 9 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.01 sec)
7、查看主从状态
show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: 192.168.123.82
Master_User: root
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 156
Relay_Log_File: node1-relay-bin.000002
Relay_Log_Pos: 324
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 156
Relay_Log_Space: 533
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 2
Master_UUID: 441b96ad-0052-11ee-85ac-000c29dbe8d4
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set, 1 warning (0.01 sec)
8、测试验证
82创建，78同步出现
