docker部署
环境准备
卸载旧版本
yum remove -y docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-selinux \
docker-engine-selinux \
docker-engine
安装依赖
yum install -y yum-utils \ device-mapper-persistent-data \ lvm2
下载阿里云仓库
wget http://mirrors.aliyun.com/repo/Centos-7.repo
wget http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y epel-release
mv *.repo /etc/yum.repo.d/
安装docker
yum install -y docker-ce
开启docker
systemctl start docker.service
systemctl enable docker.service
systemctl status docker.service
docker version
安装docker-compose
linux安装docker和docker-compose_linux安装docker-compose_yuanzelin8的博客-CSDN博客
服务器IP:192.168.100.8
文件夹和其他文件如图:
编写docker-compose.yml文件
version: '3'
services:
mysql-slave-lb:
image: nginx:latest
container_name: mysql-slave-lb
ports:
- 3307:3307
volumes:
- /home/docker/mariadb10.7/nginx/nginx.conf:/etc/nginx/nginx.conf
networks:
- mysql
depends_on:
- mysql-master
- mysql-slave1
- mysql-slave2
- mysql-slave3
mysql-master:
image: mariadb:10.7.3
container_name: mysql-master
environment:
MYSQL_ROOT_PASSWORD: "123456"
MASTER_SYNC_USER: "sync_admin" #设置脚本中定义的用于同步的账号
MASTER_SYNC_PASSWORD: "123456" #设置脚本中定义的用于同步的密码
ADMIN_USER: "root" #当前容器用于拥有创建账号功能的数据库账号
ADMIN_PASSWORD: "123456"
ALLOW_HOST: "10.10.%.%" #允许同步账号的host地址
TZ: "Asia/Shanghai" #解决时区问题
ports:
- 3306:3306
networks:
mysql:
ipv4_address: "10.10.10.10" #固定ip,因为从库在连接master的时候,需要设置host
volumes:
- /home/docker/mariadb10.7/master:/docker-entrypoint-initdb.d #挂载master脚本
- /home/docker/mariadb10.7/master/data:/var/lib/mysql
command:
- "--server-id=1"
- "--character-set-server=utf8mb4"
- "--collation-server=utf8mb4_unicode_ci"
- "--log-bin=mysql-bin"
- "--sync_binlog=1"
mysql-slave1:
image: mariadb:10.7.3
container_name: mysql-slave1
environment:
MYSQL_ROOT_PASSWORD: "123456"
SLAVE_SYNC_USER: "sync_admin" #用于同步的账号,由master创建
SLAVE_SYNC_PASSWORD: "123456"
ADMIN_USER: "root"
ADMIN_PASSWORD: "123456"
MASTER_HOST: "10.10.10.10" #master地址,开启主从同步需要连接master
TZ: "Asia/Shanghai" #设置时区
networks:
mysql:
ipv4_address: "10.10.10.20" #固定ip
volumes:
- /home/docker/mariadb10.7/slave1:/docker-entrypoint-initdb.d #挂载slave脚本
- /home/docker/mariadb10.7/slave1/data:/var/lib/mysql
command:
- "--server-id=2"
- "--character-set-server=utf8mb4"
- "--collation-server=utf8mb4_unicode_ci"
mysql-slave2:
image: mariadb:10.7.3
container_name: mysql-slave2
environment:
MYSQL_ROOT_PASSWORD: "123456"
SLAVE_SYNC_USER: "sync_admin"
SLAVE_SYNC_PASSWORD: "123456"
ADMIN_USER: "root"
ADMIN_PASSWORD: "123456"
MASTER_HOST: "10.10.10.10"
TZ: "Asia/Shanghai"
networks:
mysql:
ipv4_address: "10.10.10.30" #固定ip
volumes:
- /home/docker/mariadb10.7/slave2:/docker-entrypoint-initdb.d #挂载slave脚本
- /home/docker/mariadb10.7/slave2/data:/var/lib/mysql
command: #这里需要修改server-id,保证每个mysql容器的server-id都不一样
- "--server-id=3"
- "--character-set-server=utf8mb4"
- "--collation-server=utf8mb4_unicode_ci"
mysql-slave3:
image: mariadb:10.7.3
container_name: mysql-slave3
environment:
MYSQL_ROOT_PASSWORD: "123456"
SLAVE_SYNC_USER: "sync_admin" #用于同步的账号,由master创建
SLAVE_SYNC_PASSWORD: "123456"
ADMIN_USER: "root"
ADMIN_PASSWORD: "123456"
MASTER_HOST: "10.10.10.10" #master地址,开启主从同步需要连接master
TZ: "Asia/Shanghai" #设置时区
networks:
mysql:
ipv4_address: "10.10.10.40" #固定ip
volumes:
- /home/docker/mariadb10.7/slave3:/docker-entrypoint-initdb.d #挂载slave脚本
- /home/docker/mariadb10.7/slave3/data:/var/lib/mysql
command:
- "--server-id=4"
- "--character-set-server=utf8mb4"
- "--collation-server=utf8mb4_unicode_ci"
networks:
mysql:
driver: bridge
ipam:
driver: default
config:
- subnet: "10.10.0.0/16"
编写master用于创建同步账号的脚本create_sync_user.sh
#!/bin/bash
#定义用于同步的用户名
MASTER_SYNC_USER=${MASTER_SYNC_USER:-sync_admin}
#定义用于同步的用户密码
MASTER_SYNC_PASSWORD=${MASTER_SYNC_PASSWORD:-123456}
#定义用于登录mysql的用户名
ADMIN_USER=${ADMIN_USER:-root}
#定义用于登录mysql的用户密码
ADMIN_PASSWORD=${ADMIN_PASSWORD:-123456}
#定义运行登录的host地址
ALLOW_HOST=${ALLOW_HOST:-%}
#定义创建账号的sql语句
CREATE_USER_SQL="CREATE USER '$MASTER_SYNC_USER'@'$ALLOW_HOST' IDENTIFIED BY '$MASTER_SYNC_PASSWORD';"
#定义赋予同步账号权限的sql,这里设置两个权限,REPLICATION SLAVE,属于从节点副本的权限,REPLICATION CLIENT是副本客户端的权限,可以执行show master status语句
GRANT_PRIVILEGES_SQL="GRANT REPLICATION SLAVE,REPLICATION CLIENT ON *.* TO '$MASTER_SYNC_USER'@'$ALLOW_HOST';"
#定义刷新权限的sql
FLUSH_PRIVILEGES_SQL="FLUSH PRIVILEGES;"
#执行sql
mysql -u"$ADMIN_USER" -p"$ADMIN_PASSWORD" -e "$CREATE_USER_SQL $GRANT_PRIVILEGES_SQL $FLUSH_PRIVILEGES_SQL"
编写slave脚本slave.sh
#定义连接master进行同步的账号
SLAVE_SYNC_USER="${SLAVE_SYNC_USER:-sync_admin}"
#定义连接master进行同步的账号密码
SLAVE_SYNC_PASSWORD="${SLAVE_SYNC_PASSWORD:-123456}"
#定义slave数据库账号
ADMIN_USER="${ADMIN_USER:-root}"
#定义slave数据库密码
ADMIN_PASSWORD="${ADMIN_PASSWORD:-123456}"
#定义连接master数据库host地址
MASTER_HOST="${MASTER_HOST:-%}"
#等待10s,保证master数据库启动成功,不然会连接失败
sleep 10
#连接master数据库,查询二进制数据,并解析出logfile和pos,这里同步用户要开启 REPLICATION CLIENT权限,才能使用SHOW MASTER STATUS;
RESULT=`mysql -u"$SLAVE_SYNC_USER" -h$MASTER_HOST -p"$SLAVE_SYNC_PASSWORD" -e "SHOW MASTER STATUS;" | grep -v grep |tail -n +2| awk '{print $1,$2}'`
#解析出logfile
LOG_FILE_NAME=`echo $RESULT | grep -v grep | awk '{print $1}'`
#解析出pos
LOG_FILE_POS=`echo $RESULT | grep -v grep | awk '{print $2}'`
#设置连接master的同步相关信息
SYNC_SQL="change master to master_host='$MASTER_HOST',master_user='$SLAVE_SYNC_USER',master_password='$SLAVE_SYNC_PASSWORD',master_log_file='$LOG_FILE_NAME',master_log_pos=$LOG_FILE_POS;"
#开启同步
START_SYNC_SQL="start slave;"
#查看同步状态
STATUS_SQL="show slave status\G;"
mysql -u"$ADMIN_USER" -p"$ADMIN_PASSWORD" -e "$SYNC_SQL $START_SYNC_SQL $STATUS_SQL"
加入nginx,实现slave的负载均衡
nginx下创建nginx.conf
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
}
# 添加stream模块,实现tcp反向代理
stream {
proxy_timeout 30m;
upstream mysql-slave-cluster{
#docker-compose.yml里面会配置固定mysql-slave的ip地址,这里就填写固定的ip地址
server 10.10.10.20:3306 weight=1;
server 10.10.10.30:3306 weight=1;
server 10.10.10.40:3306 weight=1 backup; #备用数据库,当上面的数据库挂掉之后,才会使用此数据库,也就是如果上面的数据库没有挂,则所有的流量都很转发到上面的主库
}
server {
listen 0.0.0.0:3307;
proxy_pass mysql-slave-cluster;
}
}