docker-compose部署mysql主从复制

第一步：编写docker-compose.yml文件

version: "3.3"

services:
  
  mysql-master: &mysql
    image: mysql:5.7.21
    container_name: mysql-master
    restart: unless-stopped
    env_file:
      - .env
    environment:
      - MYSQL_ROOT_PASSWORD=${MASTER_MYSQL_ROOT_PASSWORD}
      - TZ=Asia/Shanghai
    ports:
      - "3306:3306"
    expose:
      - "3306"
    volumes:
      - ./mysql-master-data:/var/lib/mysql
      - ./init-db-sql/sakila-schema.sql:/docker-entrypoint-initdb.d/1-schema.sql
      - ./init-db-sql/sakila-data.sql:/docker-entrypoint-initdb.d/2-data.sql
      - ./init-db-sql/init-master.sh:/docker-entrypoint-initdb.d/3-init-master.sh
    command: [
      "--log-bin=mysql-bin",
      "--server-id=${MASTER_SERVER_ID}",
      "--character-set-server=utf8mb4",
      "--collation-server=utf8mb4_unicode_ci",
      "--innodb_flush_log_at_trx_commit=1",
      "--sync_binlog=1"
      ]

  mysql-node-1: &mysql-node
    <<: *mysql
    container_name: mysql-node-1
    environment:
      - MYSQL_ROOT_PASSWORD=${NODE_MYSQL_ROOT_PASSWORD}
      - MASTER_MYSQL_ROOT_PASSWORD=${MASTER_MYSQL_ROOT_PASSWORD}
      - TZ=Asia/Shanghai
    ports:
      - "3307:3306"
    depends_on:
      - mysql-master
    volumes:
      - ./mysql-node-1-data:/var/lib/mysql
      - ./init-db-sql/sakila-schema.sql:/docker-entrypoint-initdb.d/1-schema.sql
      - ./init-db-sql/sakila-data.sql:/docker-entrypoint-initdb.d/2-data.sql
      - ./init-db-sql/init-node.sh:/docker-entrypoint-initdb.d/3-init-node.sh
    command: [
      "--server-id=${NODE_1_SERVER_ID}",
      "--character-set-server=utf8mb4",
      "--collation-server=utf8mb4_unicode_ci",
      ]
  
  mysql-node-2:
    <<: *mysql-node
    container_name: mysql-node-2
    environment:
      - TZ=Asia/Shanghai
    ports:
      - "3308:3306"
    volumes: 
      - ./mysql-node-2-data:/var/lib/mysql
      - ./init-db-sql/sakila-schema.sql:/docker-entrypoint-initdb.d/1-schema.sql
      - ./init-db-sql/sakila-data.sql:/docker-entrypoint-initdb.d/2-data.sql
      - ./init-db-sql/init-node.sh:/docker-entrypoint-initdb.d/3-init-node.sh
    command: [
      "--server-id=${NODE_2_SERVER_ID}",
      "--character-set-server=utf8mb4",
      "--collation-server=utf8mb4_unicode_ci",
      ]

networks:
  default:
    external:
      name: maxcloud

第二步: 编写环境变量配置文件.env（隐藏文件，在目录看不到，用ls -a可看）

# image tag
TAG=5.7.21

MASTER_SERVER_ID=1
NODE_1_SERVER_ID=10
NODE_2_SERVER_ID=20

MASTER_MYSQL_ROOT_PASSWORD=123
NODE_MYSQL_ROOT_PASSWORD=123

第三步：创建init-db-sql文件夹，并在其中编写相应文件

    1.init-master.sh

#!/bin/bash

set -e

# create replication user

mysql_net=$(ip route | awk '$1=="default" {print $3}' | sed "s/\.[0-9]\+$/.%/g")

MYSQL_PWD=${MYSQL_ROOT_PASSWORD} mysql -u root \
-e "CREATE USER '${MYSQL_REPLICATION_USER}'@'${mysql_net}' IDENTIFIED BY '${MYSQL_REPLICATION_PASSWORD}'; \
GRANT REPLICATION SLAVE ON *.* TO '${MYSQL_REPLICATION_USER}'@'${mysql_net}';"

   2.init-node.sh

# set node master

MYSQL_PWD=${MYSQL_ROOT_PASSWORD} mysql -u root \
-e "CHANGE MASTER TO MASTER_HOST='mysql-master', \
MASTER_USER='${MYSQL_REPLICATION_USER}', \
MASTER_PASSWORD='${MYSQL_REPLICATION_PASSWORD}', \
MASTER_LOG_FILE='${LOG_FILE}', \
MASTER_LOG_POS=${LOG_POS};"

# start slave and show slave status

MYSQL_PWD=${MYSQL_ROOT_PASSWORD} mysql -u root -e "START SLAVE;show slave status\G"

    3.sakila-schema.sql、sakila-data.sql文件官网都有

第四步：检查配置

docker-compose config

第五步：启动容器