怎么用MySQL+Keepalived+haproxy实现负载均衡
发布时间：2022-01-19 12:59:42 所属栏目：MySql教程 来源：互联网
导读：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 slave3：192.1
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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 ..." >> $LOGFILE vi /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 ..." >> $LOGFILE vi /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 0 chmod +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。 （编辑：52站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
