Haproxy Mysql cluster 高可用Mysql集群

Posted 2021-01-09 Travel the world

-----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；

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ulimit-n 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]calhost ~]# 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