本篇内容主要讲解“怎么用MySQL+Keepalived+haproxy实现负载均衡”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“怎么用MySQL+Keepalived+haproxy实现负载均衡”吧!
数据库环境：
slave2：192.168.8.59
slave3：192.168.8.61
工具包：
keepalived-1.4.5.tar.gz
haproxy-1.8.9.tar.gz
此次实验中，slave2和slave3利用 keepalived和haproxy实现负载均衡，本文着重讲解负载均衡的搭建过程。
一、修改内核参数
echo "net.ipv4.ip_nonlocal_bind=1" >> /etc/sysctl.conf echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf sysctl -p
net.ipv4.ip_nonlocal_bind=1 意思是启动haproxy的时候，允许忽视VIP的存在
net.ipv4.ip_forward = 1 haproxy代理服务器同时也要打开内核的转发功能
二、安装keepalived和haproxy
mount /dev/cdrom /media yum install kernel-devel openssl-devel popt-devel -y cd /software tar zxvf keepalived-1.4.5.tar.gz cd keepalived-1.4.5 ./configure --prefix=/usr/local/keepalived/ make && make install systemctl enable keepalived
vi /usr/local/keepalived/etc/sysconfig/keepalived
KEEPALIVED_OPTIONS="-D -d -S 0"
vi /etc/rsyslog.conf
local0.* /var/log/keepalived.log
systemctl restart rsyslog
cd /software tar zxvf haproxy-1.8.9.tar.gz cd haproxy-1.8.9 make TARGET=linux2628 PREFIX=/usr/local/haproxy make install PREFIX=/usr/local/haproxy /usr/local/haproxy/sbin/haproxy -v useradd -r -s /sbin/nologin haproxy touch /var/log/haproxy.log chmod 755 /var/log/haproxy.log
修改日志位置
vi /etc/rsyslog.conf local0.* /var/log/haproxy.log vi /etc/sysconfig/rsyslog SYSLOGD_OPTIONS="-r -m 0 -c 2" systemctl restart rsyslog
三、配置keepalived
192.168.8.59
/etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id mysql-slave
notification_email {
zdd5503@163.com
}
notification_email_from zdd5503@163.com
smtp_server stmp.163.com
smtp_connect_timeout 30
}
vrrp_script chk_haproxy {
script "/etc/keepalived/scripts/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance v_mysql_slave_zdd01 {
interface enp0s3
state MASTER
virtual_router_id 98
priority 200
nopreempt
virtual_ipaddress {
192.168.8.98/24
}
track_script {
chk_haproxy
}
notify_master /etc/keepalived/scripts/haproxy_master.sh
notify_backup /etc/keepalived/scripts/haproxy_backup.sh
notify_fault /etc/keepalived/scripts/haproxy_fault.sh
notify_stop /etc/keepalived/scripts/haproxy_stop.sh
}192.168.8.61
/etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id mysql-slave
notification_email {
zdd5503@163.com
}
notification_email_from zdd5503@163.com
smtp_server stmp.163.com
smtp_connect_timeout 30
}
vrrp_script chk_haproxy {
script "/etc/keepalived/scripts/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance v_mysql_slave_zdd01 {
interface enp0s3
state BACKUP
virtual_router_id 98
priority 150
nopreempt
virtual_ipaddress {
192.168.8.98/24
}
track_script {
chk_haproxy
}
notify_master /etc/keepalived/scripts/haproxy_master.sh
notify_backup /etc/keepalived/scripts/haproxy_backup.sh
notify_fault /etc/keepalived/scripts/haproxy_fault.sh
notify_stop /etc/keepalived/scripts/haproxy_stop.sh
}四、配置haproxy
192.168.8.59和192.168.8.61都做如下脚本配置：
mkdir -p /etc/keepalived/scripts
vi /etc/keepalived/scripts/check_haproxy.sh
#!/bin/bash STARTHAPROXY="/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg" #STOPKEEPALIVED="systemctl stop keepalived" LOGFILE="/etc/keepalived/scripts/keepalived-haproxy-state.log" echo "[check_haproxy status]" >> $LOGFILE A=`ps -C haproxy --no-header |wc -l` echo "[check_haproxy status]" >> $LOGFILE date >> $LOGFILE if [ $A -eq 0 ];then echo $STARTHAPROXY >> $LOGFILE $STARTHAPROXY >> $LOGFILE 2>&1 sleep 5 fi if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then exit 0 else exit 1 fi
vi /etc/keepalived/scripts/haproxy_master.sh
#!/bin/bash
STARTHAPROXY=`/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg`
STOPHAPROXY=`ps -ef |grep sbin/haproxy| grep -v grep|awk '{print $2}'|xargs kill -s 9`
LOGFILE="/etc/keepalived/scripts/keepalived-haproxy-state.log"
echo "[master]" >> $LOGFILE
date >> $LOGFILE
echo "Being master...." >> $LOGFILE 2>&1
echo "stop haproxy...." >> $LOGFILE 2>&1
$STOPHAPROXY >> $LOGFILE 2>&1
echo "start haproxy...." >> $LOGFILE 2>&1
$STARTHAPROXY >> $LOGFILE 2>&1
echo "haproxy stared ..." >> $LOGFILEvi /etc/keepalived/scripts/haproxy_backup.sh
#!/bin/bash
STARTHAPROXY=`/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg`
STOPHAPROXY=`ps -ef |grep sbin/haproxy| grep -v grep|awk '{print $2}'|xargs
kill -s 9`
LOGFILE="/etc/keepalived/scripts/keepalived-haproxy-state.log"
echo "[master]" >> $LOGFILE
date >> $LOGFILE
echo "Being master...." >> $LOGFILE 2>&1
echo "stop haproxy...." >> $LOGFILE 2>&1
$STOPHAPROXY >> $LOGFILE 2>&1
echo "start haproxy...." >> $LOGFILE 2>&1
$STARTHAPROXY >> $LOGFILE 2>&1
echo "haproxy stared ..." >> $LOGFILEvi /etc/keepalived/scripts/haproxy_fault.sh
#!/bin/bash LOGFILE=/etc/keepalived/scripts/keepalived-haproxy-state.log echo "[fault]" >> $LOGFILE date >> $LOGFILE
vi /etc/keepalived/scripts/haproxy_stop.sh
#!/bin/bash LOGFILE=/etc/keepalived/scripts/keepalived-haproxy-state.log echo "[stop]" >> $LOGFILE date >> $LOGFILE
更改脚本属性
chmod 755 /etc/keepalived/scripts/*
配置haproxy
192.168.8.59
vi /usr/local/haproxy/haproxy.cfg
global #全局配置参数 log 127.0.0.1 local0 notice #日志 #user haproxy #group haproxy daemon #以后台形式运行haproxy #quiet nbproc 1 # 进程数量，可以设置多个进程提高性能 pidfile /usr/local/haproxy/haproxy.pid #haproxy的pid存放路径 defaults #一些默认参数 log global #全局日志 retries 3 # 3次连接失败就认为服务器不可用 option dontlognull # 保存haproxy不记录上次负载均衡发送过来的用于检测状态没有数据的心跳包 option redispatch # 对应的服务器挂掉后，强制指向到其它正常的服务器 maxconn 2000 #默认最大连接数 timeout queue 1m # 等待最大时长 timeout http-request 10s #客户端建立连接又不请求数据的时候超过10S，就关闭客户端连接 timeout connect 10s # 定义haproxy将客户端请求转发至后端服务器所等待的超时时长 timeout server 1m # 服务端非活动状态的超时时长 timeout client 1m # 客户端非活动状态的超时时长 timeout http-keep-alive 10s # 设置http-keep-alive超时时长 timeout check 10s #健康状态监测时的超时时间 balance roundrobin #负载均衡方式，轮询方式（保持会话session:源地址/cookies,针对web应用服务器） #定义负载均衡的配置 listen mysql_slave_wgpt_lb1 bind 192.168.8.98:3307 #绑定的IP与端口 (建议bind *:3306) mode tcp #模式是TCP，（7层http,4层tcp，如果是mysql用tcp，如果是weblogic/was/tomcat之类的就用http） option mysql-check user haproxy_check #通过mysql连接去检测mysql是否可以访问 stats hide-version #隐藏统计页上的haproxy的版本信息 balance roundrobin #负载均衡方式，轮询方式 server slave2 192.168.8.59:3306 weight 1 check inter 2000 rise 2 fall 5 maxconn 300 server slave3 192.168.8.61:3306 weight 1 check inter 2000 rise 2 fall 5 maxconn 300 #服务器定义,check inter 2000检测心跳频率，rise 2 2次正确认为服务器可用，fall 5 5次失败认为服务器不可用， #maxconn 300 最大连接数300 #自带的监控服务器的配置 listen haproxy_stats mode http bind *:8888 option httplog stats refresh 5s stats uri /haproxy-stat stats realm www.zdd.com monitor stats realm Haproxy Manager stats auth haproxy:haproxy
192.168.8.61
vi /usr/local/haproxy/haproxy.cfg
global #全局配置参数 log 127.0.0.1 local0 notice #日志 #user haproxy #group haproxy daemon #以后台形式运行haproxy #quiet nbproc 1 # 进程数量，可以设置多个进程提高性能 pidfile /usr/local/haproxy/haproxy.pid #haproxy的pid存放路径 defaults #一些默认参数 log global #全局日志 retries 3 # 3次连接失败就认为服务器不可用 option dontlognull # 保存haproxy不记录上次负载均衡发送过来的用于检测状态没有数据的心跳包 option redispatch # 对应的服务器挂掉后，强制指向到其它正常的服务器 maxconn 2000 #默认最大连接数 timeout queue 1m # 等待最大时长 timeout http-request 10s #客户端建立连接又不请求数据的时候超过10S，就关闭客户端连接 timeout connect 10s # 定义haproxy将客户端请求转发至后端服务器所等待的超时时长 timeout server 1m # 服务端非活动状态的超时时长 timeout client 1m # 客户端非活动状态的超时时长 timeout http-keep-alive 10s # 设置http-keep-alive超时时长 timeout check 10s #健康状态监测时的超时时间 balance roundrobin #负载均衡方式，轮询方式（保持会话session:源地址/cookies,针对web应用服务器） #定义负载均衡的配置 listen mysql_slave_wgpt_lb1 bind 192.168.8.98:3307 #绑定的IP与端口 (建议bind *:3306) mode tcp #模式是TCP，（7层http,4层tcp，如果是mysql用tcp，如果是weblogic/was/tomcat之类的就用http） option mysql-check user haproxy_check #通过mysql连接去检测mysql是否可以访问 stats hide-version #隐藏统计页上的haproxy的版本信息 balance roundrobin #负载均衡方式，轮询方式 server slave2 192.168.8.59:3306 weight 1 check inter 2000 rise 2 fall 5 maxconn 300 server slave3 192.168.8.61:3306 weight 1 check inter 2000 rise 2 fall 5 maxconn 300 #服务器定义,check inter 2000检测心跳频率，rise 2 2次正确认为服务器可用，fall 5 5次失败认为服务器不可用， #maxconn 300 最大连接数300 #自带的监控服务器的配置 listen haproxy_stats mode http bind *:8888 option httplog stats refresh 5s stats uri /haproxy-stat stats realm www.zdd.com monitor stats realm Haproxy Manager stats auth haproxy:haproxy
五、添加 haproxy_check 用户
drop user haproxy_check@'%'; create user haproxy_check@'192.168.8.59'; create user haproxy_check@'192.168.8.61'; create user haproxy_check@'192.168.8.98'; grant usage on *.* to haproxy_check@'192.168.8.59'; grant usage on *.* to haproxy_check@'192.168.8.61'; grant usage on *.* to haproxy_check@'192.168.8.98';
mysql> select user,host from mysql.user; +---------------+--------------+ | user | host | +---------------+--------------+ | repl | 192.168.8.% | | root | 192.168.8.% | | haproxy_check | 192.168.8.59 | | haproxy_check | 192.168.8.61 | | haproxy_check | 192.168.8.98 | | mysql.session | localhost | | mysql.sys | localhost | | root | localhost | +---------------+--------------+
六、启动 keepalived
systemctl daemon-reload systemctl enable keepalived systemctl start keepalived
ip a |grep 98 ps -ef |grep keepalived
七、配置keepalived监控脚本
两个节点都做如下配置：
vi /etc/keepalived/keepcheck.sh
#!/bin/bash while : do keepalivedcheck=`ps -C keepalived --no-header | wc -l` if [ $keepalivedcheck -eq 0 ];then systemctl start keepalived else echo "keepalived is running" fi sleep 5 done
chmod +x /etc/keepalived/keepcheck.sh nohup /etc/keepalived/keepcheck.sh & echo "nohup /etc/keepalived/keepcheck.sh &" >> /etc/rc.d/rc.local
八、配置haproxy 启动脚本
vim /etc/rc.d/init.d/haproxy
#! /bin/sh
set -e
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/haproxy/sbin
PROGDIR=/usr/local/haproxy
PROGNAME=haproxy
DAEMON=$PROGDIR/sbin/$PROGNAME
CONFIG=$PROGDIR/$PROGNAME.cfg
PIDFILE=$PROGDIR/$PROGNAME.pid
DESC="HAProxy daemon"
SCRIPTNAME=/etc/init.d/$PROGNAME
# Gracefully exit if the package has been removed.
test -x $DAEMON || exit 0
start()
{
echo -n "Starting $DESC: $PROGNAME"
$DAEMON -f $CONFIG
echo "."
}
stop()
{
echo -n "Stopping $DESC: $PROGNAME"
haproxy_pid=`cat $PIDFILE`
kill -9 $haproxy_pid
echo "."
}
restart()
{
echo -n "Restarting $DESC: $PROGNAME"
$DAEMON -f $CONFIG -p $PIDFILE -sf $(cat $PIDFILE)
echo "."
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
*)
echo "Usage: $SCRIPTNAME {start|stop|restart}" >&2
exit 1
;;
esac
exit 0chmod +x /etc/rc.d/init.d/haproxy echo "nohup /etc/rc.d/init.d/haproxy start &" >> /etc/rc.d/rc.local
systemctl stop keepalived systemctl start keepalived tail -f /var/log/keepalived.log
/etc/rc.d/init.d/haproxy start /etc/rc.d/init.d/haproxy stop tail -f /var/log/haproxy.log
haproxy控制台访问地址：
http://192.168.8.98:8888/haproxy-stat
九、测试负载均衡
[root@slave3 ~]# mysql -uroot -pmysql -h292.168.8.98 -P3307 -e "show variables like 'server_id';" mysql: [Warning] Using a password on the command line interface can be insecure. +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 59 | +---------------+-------+ [root@slave3 ~]# mysql -uroot -pmysql -h292.168.8.98 -P3307 -e "show variables like 'server_id';" mysql: [Warning] Using a password on the command line interface can be insecure. +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 61 | +---------------+-------+ [root@slave3 ~]# mysql -uroot -pmysql -h292.168.8.98 -P3307 -e "show variables like 'server_id';" mysql: [Warning] Using a password on the command line interface can be insecure. +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 59 | +---------------+-------+ [root@slave3 ~]# mysql -uroot -pmysql -h292.168.8.98 -P3307 -e "show variables like 'server_id';" mysql: [Warning] Using a password on the command line interface can be insecure. +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 61 | +---------------+-------+ [root@slave3 ~]# mysql -uroot -pmysql -h292.168.8.98 -P3307 -e "show variables like 'server_id';" mysql: [Warning] Using a password on the command line interface can be insecure. +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 59 | +---------------+-------+ [root@slave3 ~]# mysql -uroot -pmysql -h292.168.8.98 -P3307 -e "show variables like 'server_id';" mysql: [Warning] Using a password on the command line interface can be insecure. +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 61 | +---------------+-------+
因为我们在haproxy配置文件中配置了权重为1：1，所以会话将交替分发到两个节点上边。
到此，相信大家对“怎么用MySQL+Keepalived+haproxy实现负载均衡”有了更深的了解，不妨来实际操作一番吧！这里是亿速云网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
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