Haproxy代理Mysql服务

Posted 2020-08-27

-----client---------haproxy-------mysql1---------mysql2------

192.168.1.250 192.168.1.1 192.168.1.10 192.168.1.20

一、安装mysql

[[email protected] ~]#tar -zxvf bison-2.5.tar.gz

[[email protected] ~]#./configure && make&& make install

[[email protected] ~]#tar -zxvf cmake-2.8.7.tar.gz

[[email protected] ~]#./bootstrap && gmake && gmake install

[[email protected] ~]#tar -zxvf mysql-5.5.22.tar.gz

[[email protected] ~]#cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -

DSYSCONFDIR=/etc/ -DDEFAULT_CHARSET=utf8 -

DDEFAULT_COLLATION=utf8_general_ci -DWITH_EXTRA_CHARSETS=all

[[email protected] ~]#make && make install

初始化mysql：

[[email protected] ~]# cp support-files/my-medium.cnf /etc/my.cnf

[[email protected] ~]# cd scripts

[[email protected] ~]# ./mysql_install_db --basedir=/usr/local/mysql/ --

datadir=/usr/local/mysql/data/ --user=mysql

[[email protected] ~]# cp ../support-files/mysql.server /etc/init.d/mysqld

[[email protected] ~]# ln -s /usr/local/mysql/bin/* /usr/local/bin/

[[email protected] ~]# mysqladmin -u root password ‘redhat‘

登录测试：

[[email protected] ~]# mysql -u root -p

创建数据库：

[[email protected] ~]# mysql> createdata server1；

当然你也可以使用yum的方式安装mysql

[[email protected] ~]# yum -y install mysql mysql-devel mysql-server

二、安装haproxy

1、安装

[[email protected] ~]# yum -y install pcre-devel zlib-devel

[[email protected] ~]# tar -zxvf haproxy-1.4.24.tar.gz -C /usr/src/

[[email protected] ~]# cd /usr/src/haproxy-1.4.24/

[[email protected] ~]# make TARGET=linux26 PREFIX=/usr/local/haproxy

注意：linux26 是指linux 的内核版本号。

[[email protected] ~]# make install PREFIX=/usr/local/haproxy

2、配置haproxy

[[email protected] ~]# mkdir /etc/haproxy

[[email protected] ~]# cp /usr/src/haproxy-1.4.24/examples/haproxy.cfg /etc/haproxy/

[[email protected] ~]# vim /etc/haproxy/haproxy.cfg

修改：

global

log 127.0.0.1 local0 //配置日志记录，local0 为日志设备，默认存放到系统日志

log 127.0.0.1 local1 notice //notice 为日志级别，通常有7 个级别

#log loghost local0 info

maxconn 4096 //默认最大连接数,需考虑ulimit-n 限制 ：可增加ulimitn

819200 #ulimit 的数量限制

chroot /usr/share/haproxy //运行路径

uid 99

gid 99

#debug

#quiet

defaults

log global //定义日志为global 中的日志

mode tcp //模式为四层

option tcplog //采用http 的日志格式

option dontlognull //不记录健康检查日志信息

retries 3 //三次连接失败就认为是服务器不可用，也可以通过后面设置

#redispatch

maxconn 2000 //最大连接数

contimeout 5000 //连接超时时间

clitimeout 50000 //客户端超时时间

srvtimeout 50000 //服务端超时时间

listen stats

mode http

bind :6677

stats enable

stats hide-version

stats uri /haproxyadmin?stats

stats realm Haproxy\ Statistics

stats auth admin:admin

stats admin if TRUE

listen mysqlcluster 0.0.0.0:3306

balance roundrobin

server m1 192.168.56.202:3306 check port 3306 maxconn 300

server m2 192.168.56.203:3306 check port 3306 maxconn 300

注意：

如果启动时出现报错：/haproxy.main()] Cannot chroot(/usr/share/haproxy)

则手动创建：

[[email protected] ~]# mkdir /usr/share/haproxy

如果启动时出现报错：Starting proxy cacti: cannot bind socket

则执行：

[[email protected] ~]# sysctl -e net.ipv4.ip_nonlocal_bind=1

3、启动haproxy

[[email protected] ~]# ln -s /usr/local/haproxy/sbin/* /usr/sbin/ //注意软链接的目录

[[email protected] ~]# cp /usr/src/haproxy-1.4.24/examples/haproxy.init

/etc/init.d/haproxy

[[email protected] ~]# chmod +x /etc/init.d/haproxy

[[email protected] ~]# /etc/init.d/haproxy start

[[email protected] ~]# /etc/init.d/haproxy status

[[email protected] ~]# netstat -anp | grep haproxy //占用的也是TCP 的80 端口

[[email protected] ~]# chkconfig --add haproxy

[[email protected] ~]# chkconfig haproxy on

http://192.168.56.200:6677/haproxyadmin?stats 查看集群的状态

四、MySql 授权用户登录（集群内的mysql 都要授权）

mysql> GRANT ALL ON *.* TO ‘root‘@‘192.168.56.%‘ IDENTIFIED BY ‘redhat‘;

mysql> flush privileges;

五、测试：

[[email protected] ~]# mysql -u root -h 192.168.56.200 -p

登录两次分别查看

可增加keepalived

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