本文主要向大家介绍了docker-compose.yml样例（MySQL数据库主从+mycat读写分离） ，通过具体的内容向大家展现，希望对大家学习MySQL数据库有所帮助。

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1、mysql主从复制的docker-compose.yml文件

# cat docker-compose.yml

version: ‘2‘ # 这个version是指dockerfile解析时用的版本,不是给我们自己定义版本号用的.

services:

  m1: # master

    build: ./master # ./master文件下需要有Dockerfile文件,并且build属性和image属性不能一起使用

    container_name: m1 # 容器名

    volumes: # 挂载 下边每行前边的`-`代表这个东西是数组的一个元素.就是说volumes属性的值是一个数组

      - /home/ssab/config/mysql-master/:/etc/mysql/:ro # 注意改下映射关系

      - /etc/localtime:/etc/localtime:ro

      - /home/ssab/config/hosts:/etc/hosts:ro # 注意改下映射关系

    networks: # 网络

      mysql: # 见跟services平级的networks,在最下边

        ipv4_address: 172.18.0.2 # 设置静态ipv4的地址

    ulimits: # 操作系统限制

      nproc: 65535

    hostname: m1 # hostname

    mem_limit: 1024m # 最大内存使用不超过1024m,我在本地机器上测试,才只写了1024m,生产上需要根据自己的服务器配置,以及docker容器数进行调优.

    restart: always # 容器重启策略

    environment: # 设置环境变量

      MYSQL_ROOT_PASSWORD: m1test

  s1: # slave1

      build: ./s1

      container_name: s1

      volumes:

        - /home/ssab/config/mysql-s1/:/etc/mysql/:ro

        - /etc/localtime:/etc/localtime:ro

        - /home/ssab/config/hosts:/etc/hosts:ro

      networks:

        mysql:

          ipv4_address: 172.18.0.3

      links:

        - m1

      ulimits:

        nproc: 65535

      hostname: s1

      mem_limit: 1024m

      restart: always

      environment:

        MYSQL_ROOT_PASSWORD: s1test

  s2:# slave2

    build: ./s2

    container_name: s2

    volumes:

      - /home/ssab/config/mysql-s2/:/etc/mysql/:ro

      - /etc/localtime:/etc/localtime:ro

      - /home/ssab/config/hosts:/etc/hosts:ro

    links:

      - m1

    networks:

      mysql:

        ipv4_address: 172.18.0.4

    ulimits:

      nproc: 65535

    hostname: s2

    mem_limit: 1024m

    restart: always

    environment:

      MYSQL_ROOT_PASSWORD: s2test

networks: # docker网络设置

  mysql: # 自定义网络名称

    driver: bridge # 桥接

    ipam: # 要使用静态ip必须使用ipam插件

      driver: default

      config:

      - subnet: 172.18.0.0/24

        gateway: 172.18.0.1

 

2、mycat+mysql读写分离的docker-compose.yml文件：

# cat dicker-compose.yml

version:‘2‘
services:
  m1:
    build: ./master
    container_name: m1
    volumes:
      - /home/ssab/config/mysql-master/:/etc/mysql/:ro
      - /etc/localtime:/etc/localtime:ro
      - /home/ssab/config/hosts:/etc/hosts:ro
    ports:
      - "3309:3306"#暴露mysql的端口
    networks:
      mysql:
        ipv4_address:172.18.0.2
    ulimits:
      nproc:65535
    hostname: m1
    mem_limit:1024m
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: m1test
  s1:
      build: ./s1
      container_name: s1
      volumes:
        - /home/ssab/config/mysql-s1/:/etc/mysql/:ro
        - /etc/localtime:/etc/localtime:ro
        - /home/ssab/config/hosts:/etc/hosts:ro
      ports:
        - "3307:3306"
      networks:
        mysql:
          ipv4_address:172.18.0.3
      links:
        - m1
     ulimits:
        nproc:65535
      hostname: s1
      mem_limit:1024m
      restart: always
      environment:
        MYSQL_ROOT_PASSWORD: s1test
  s2:
    build: ./s2
    container_name: s2
    volumes:
      - /home/ssab/config/mysql-s2/:/etc/mysql/:ro
      - /etc/localtime:/etc/localtime:ro
      - /home/ssab/config/hosts:/etc/hosts:ro
    ports:
      - "3308:3306"
    links:
      - m1
    networks:
      mysql:
        ipv4_address:172.18.0.4
    ulimits:
      nproc:65535
    hostname: s2
    mem_limit:1024m
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: s2test
  mycat:# 设置mycat
    build: ./mycat
    container_name: mycat
    volumes:
      - /home/ssab/config/mycat/:/mycat/conf/:ro# mycat配置文件
      - /home/ssab/config/mycat-logs/:/mycat/logs/:rw# mycat日志文件
      - /etc/localtime:/etc/localtime:ro
      - /home/ssab/config/hosts:/etc/hosts:ro
    ports:
      - "8066:8066"# 暴露mycat服务端口
      - "9066:9066"# 暴露mycat管理端口
    links:# mycat可以连接m1 s1 s2
      - m1
      - s1
      - s2
    networks:
      mysql:
        ipv4_address:172.18.0.5
    ulimits:
      nproc:65535
    hostname: mycat
    mem_limit:1024m
    restart: always
networks:
  mysql:
    driver: bridge
    ipam:
      driver: default
      config:
      - subnet:172.18.0.0/24
        gateway:172.18.0.1
 

 

 

mysql的Dockerfile样例：

FROMmysql:5.7.17
MAINTAINER <ssabwork_wjj@163.com>
EXPOSE 3306
CMD ["mysqld"]
 

mycat的Dockerfile样例：

FROM java:8-jre
MAINTAINER <ssab work_wjj@163.com>
LABEL Description="使用mycat做mysql数据库的读写分离"
ENV mycat-version Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
USER root
COPY ./Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz /
RUN tar -zxf /Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
ENV MYCAT_HOME=/mycat
ENV PATH=$PATH:$MYCAT_HOME/bin
WORKDIR $MYCAT_HOME/bin
RUN chmod u+x ./mycat
EXPOSE 80669066
CMD ["./mycat","console"]    

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