haproxy+mysql双主

一、安装haproxy

1.找到haproxy的包

http://pkgs.fedoraproject.org/repo/pkgs/haproxy/haproxy-1.7.9.tar.gz

也可以直接用yum安装

yum install -y haproxy

2.解压

tar zxf haproxy-1.7.9.tar.gz

3.编译安装

cd haproxy-1.7.9

make TARGET=linux26 ARCH=x86_64   (查看自己系统是什么)

make install SBINDIR=/usr/sbin/ MANDIR=/usr/share/man/ DOCDIR=/usr/share/doc/

4.编辑启动脚本

vi /etc/init.d/haproxy

#!/bin/sh
#
# haproxy
#
# chkconfig:   - 85 15
# description:  HAProxy is a free, very fast and reliable solution \
#               offering high availability, load balancing, and \
#               proxying for TCP and  HTTP-based applications
# processname: haproxy
# config:      /etc/haproxy/haproxy.cfg
# pidfile:     /var/run/haproxy.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

exec="/usr/sbin/haproxy"
prog=$(basename $exec)

[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

cfgfile=/etc/haproxy/haproxy.cfg
pidfile=/var/run/haproxy.pid
lockfile=/var/lock/subsys/haproxy

check() {
    $exec -c -V -f $cfgfile $OPTIONS
}

start() {
    $exec -c -q -f $cfgfile $OPTIONS
    if [ $? -ne 0 ]; then
        echo "Errors in configuration file, check with $prog check."
        return 1
    fi

    echo -n $"Starting $prog: "
    # start it up here, usually something like "daemon $exec"
    daemon $exec -D -f $cfgfile -p $pidfile $OPTIONS
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    # stop it here, often "killproc $prog"
    killproc $prog
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    $exec -c -q -f $cfgfile $OPTIONS
    if [ $? -ne 0 ]; then
        echo "Errors in configuration file, check with $prog check."
        return 1
    fi
    stop
    start
}

reload() {
    $exec -c -q -f $cfgfile $OPTIONS
    if [ $? -ne 0 ]; then
        echo "Errors in configuration file, check with $prog check."
        return 1
    fi
    echo -n $"Reloading $prog: "
    $exec -D -f $cfgfile -p $pidfile $OPTIONS -sf $(cat $pidfile)
    retval=$?
    echo
    return $retval
}

force_reload() {
    restart
}

fdr_status() {
    status $prog
}

case "$1" in
    start|stop|restart|reload)
        $1
        ;;
    force-reload)
        force_reload
        ;;
    check)
        check
        ;;
    status)
        fdr_status
        ;;
    condrestart|try-restart)
        [ ! -f $lockfile ] || restart
        ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|try-restart|reload|force-reload}"
        exit 2
esac

5.加入自启动

chkconfig --add haproxy

chkconfig haproxy on

chmod +x /etc/init.d/haproxy

 

二、配置haproxy

1.新建目录和用户

mkdir /etc/haproxy

mkdir /var/lib/haproxy

useradd -r haproxy

2.编辑配置文件

vi /etc/haproxy/haproxy.cfg

global
    log         127.0.0.1 local2
    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon
    stats socket /var/lib/haproxy/stats

defaults
        log     global
        log 127.0.0.1 local3
        mode    http
        option  tcplog
        option  dontlognull
        retries 10
        option redispatch
        maxconn         2000
        timeout connect         10s
        timeout client          1m
        timeout server          1m
        timeout http-keep-alive 10s
        timeout check           10s

listen  mysql
        bind 0.0.0.0:7306
        mode tcp
        balance roundrobin
        server mysql1 192.168.1.78:3306
        server mysql2 192.168.1.77:3306

listen stats
        bind 0.0.0.0:1080
        mode http
        option httplog
        maxconn 10
        stats refresh 30s
        stats uri /stats
        stats realm XingCloud\ Haproxy
        stats auth admin:admin #用这个账号登录，可以自己设置
        stats auth Frank:Frank
        stats hide-version
        stats admin if TRUE

3.配置日志

(1).vim /etc/rsyslog.conf 

# Provides UDP syslog reception #去掉下面两行注释，开启UDP监听

$ModLoad imudp

$UDPServerRun 514

local2.*             /var/log/haproxy.log                           #添加日志

(2).vi /etc/sysconfig/rsyslog

SYSLOGD_OPTIONS=""

改为 SYSLOGD_OPTIONS="-r -m 2 -c 2" 

(3).创建日志文件

touch /var/log/haproxy.log

4.启动日志和haproxy

service haproxy start

service rsyslog restart

netstat -plantu | grep 7306 --查看端口7306

 

三、测试haproxy是否成功

1.在两台数据库添加权限

GRANT ALL ON *.* TO 'haproxy'@'192.168.1.%' IDENTIFIED BY '123456';

FLUSH PRIVILEGES;

2.在haproxy这台服务器远程登录到mysql服务器，测试

yum install -y mysql (若没有mysql客户端，安装)

mysql -uhaproxy -p123456 -h 192.168.1.78

mysql -uhaproxy -p123456 -h 192.168.1.77

3.测试haproxy

在其他的服务器上输入(haproxy的服务器地址192.168.88)：

mysql -uhaproxy -p123456 -h 192.168.88 -P 7306

是否能连接到数据库

7306是在配置文件中设置的端口，通过haproxy的7306端口访问mysql的3306端口

4.页面访问

浏览器输入http://192.168.1.88:1080/stats

出现下图所示：

证明成功。