Docker配置mysql主从配置

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一： 注意事项

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* 一，mysql版本必须相同
* 二 ，互相ping通
* 三， 同一操作系统

docker 安装mysql
方法一

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创建Dockerfile
首先，创建目录mysql,用于存放后面的相关东西。
	mkdir -p ~/mysql/data ~/mysql/logs ~/mysql/conf
	
	data目录将映射为mysql容器配置的数据文件存放路径
	logs目录将映射为mysql容器的日志目录
	conf目录里的配置文件将映射为mysql容器的配置文件
	进入创建的mysql目录，创建Dockerfile

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Dockerfile示例
FROM debian:jessie
# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r mysql && useradd -r -g mysql mysql
# add gosu for easy step-down from root
ENV GOSU_VERSION 1.7
RUN set -x \
    && apt-get update && apt-get install -y --no-install-recommends ca-certificates wget && rm -rf /var/lib/apt/lists/* \
    && wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
    && wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
    && export GNUPGHOME="$(mktemp -d)" \
    && gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
    && gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
    && rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
    && chmod +x /usr/local/bin/gosu \
    && gosu nobody true \
    && apt-get purge -y --auto-remove ca-certificates wget
RUN mkdir /docker-entrypoint-initdb.d
# FATAL ERROR: please install the following Perl modules before executing /usr/local/mysql/scripts/mysql_install_db:
# File::Basename
# File::Copy
# Sys::Hostname
# Data::Dumper
RUN apt-get update && apt-get install -y perl pwgen --no-install-recommends && rm -rf /var/lib/apt/lists/*
# gpg: key 5072E1F5: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5
ENV MYSQL_MAJOR 5.6
ENV MYSQL_VERSION 5.6.31-1debian8
RUN echo "deb http://repo.mysql.com/apt/debian/ jessie mysql-${MYSQL_MAJOR}" > /etc/apt/sources.list.d/mysql.list
# the "/var/lib/mysql" stuff here is because the mysql-server postinst doesn't have an explicit way to disable the mysql_install_db codepath besides having a database already "configured" (ie, stuff in /var/lib/mysql/mysql)
# also, we set debconf keys to make APT a little quieter
RUN { \
        echo mysql-community-server mysql-community-server/data-dir select ''; \
        echo mysql-community-server mysql-community-server/root-pass password ''; \
        echo mysql-community-server mysql-community-server/re-root-pass password ''; \
        echo mysql-community-server mysql-community-server/remove-test-db select false; \
    } | debconf-set-selections \
    && apt-get update && apt-get install -y mysql-server="${MYSQL_VERSION}" && rm -rf /var/lib/apt/lists/* \
    && rm -rf /var/lib/mysql && mkdir -p /var/lib/mysql /var/run/mysqld \
    && chown -R mysql:mysql /var/lib/mysql /var/run/mysqld \
# ensure that /var/run/mysqld (used for socket and lock files) is writable regardless of the UID our mysqld instance ends up having at runtime
    && chmod 777 /var/run/mysqld
# comment out a few problematic configuration values
# don't reverse lookup hostnames, they are usually another container
RUN sed -Ei 's/^(bind-address|log)/#&/' /etc/mysql/my.cnf \
    && echo 'skip-host-cache\nskip-name-resolve' | awk '{ print } $1 == "[mysqld]" && c == 0 { c = 1; system("cat") }' /etc/mysql/my.cnf > /tmp/my.cnf \
    && mv /tmp/my.cnf /etc/mysql/my.cnf
VOLUME /var/lib/mysql
COPY docker-entrypoint.sh /usr/local/bin/
RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat
ENTRYPOINT ["docker-entrypoint.sh"]
EXPOSE 3306
CMD ["mysqld"]

通过Dockerfile创建一个镜像，替换成你自己的名字

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docker build -t mysql .

创建完成后，我们可以在本地的镜像列表里查找到刚刚创建的镜像

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docker images |grep mysql
mysql               5.6                 2c0964ec182a        3 weeks ago         329 MB

方法二、docker pull mysql

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 docker pull mysql:5.6
 
 docker run -p 3306:3306 --name mymysql -v $PWD/conf/my.cnf:/etc/mysql/my.cnf -v $PWD/logs:/logs -v $PWD/data:/mysql_data -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.6
 
命令说明：
    -p 3306:3306：将容器的3306端口映射到主机的3306端口
    -v $PWD/conf/my.cnf:/etc/mysql/my.cnf：将主机当前目录下的conf/my.cnf挂载到容器的/etc/mysql/my.cnf
    -v $PWD/logs:/logs：将主机当前目录下的logs目录挂载到容器的/logs
    -v $PWD/data:/mysql_data：将主机当前目录下的data目录挂载到容器的/mysql_data
    -e MYSQL_ROOT_PASSWORD=123456：初始化root用户的密码

查看容器启动情况

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docker ps

新建两个文件
my_master.cnf

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 [mysqld]
server_id = 1
log-bin=mysql-bin
server-id=2
binlog-ignore-db=information_schema
binlog-ignore-db=cluster
binlog-ignore-db=mysql
binlog-do-db=test
 
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/

my_slave.cnf

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[mysqld]
log-bin=mysql-bin
server-id=3
binlog-ignore-db=information_schema
binlog-ignore-db=cluster
binlog-ignore-db=mysql
replicate-do-db=test
replicate-ignore-db=mysql
log-slave-updates
slave-skip-errors=all
slave-net-timeout=60
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/

##参数的意义可以查看我之前写的文章

运行

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// master 
docker run   -d -p 3305:3306 -e MYSQL_ROOT_PASSWORD=anech -v my.cnf:/etc/mysql/my.cnf  master_mysql
// salve
docker run   -d -p 3307:3306 -e MYSQL_ROOT_PASSWORD=anech -v /salve/my.cnf:/etc/mysql/my.cnf  slave_mysql

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