1. haproxy 官网
http://www.haproxy.org/#doc1.8
2. 最新稳定版下载：
http://www.haproxy.org/download/1.8/src/haproxy-1.8.14.tar.gz
3. 安装
tar -zxvf haproxy-1.8.14.tar.gz
cd haproxy-1.8.14
uname -r 查看内核版本
cat README 可以查看安装说明，系统版本支持等参数
make TARGET=linux2628 PREFIX=/usr/local/haproxy #指定操作系统内核类型和安装的路径。也可以直接修改Makefile配置文件中这两个变量的值。如下：
vim Makefile
make install PREFIX=/usr/local/haproxy
vim /usr/local/haproxy/etc/haproxy.cfg #手动创建配置文件
关于负载均衡算法
#source 根据请求源IP
#static-rr 根据权重
#leastconn 最少连接者先处理
#uri 根据请求的uri
#url_param 根据请求的url参数
#rdp-cookie 据据cookie(name)来锁定并哈希每一次请求
#hdr(name) 根据HTTP请求头来锁定每一次HTTP请求
#roundrobin 轮询方式
使用nobody用户运行haproxy
# id nobody
uid=99(nobody) gid=99(nobody) groups=99(nobody) #id 为99
复制haproxy启动脚本，到/etc/init.d下
# cp ./haproxy-1.7.9/examples/haproxy.init /etc/init.d/haproxy
# chmod 755 /etc/init.d/haproxy
# vim /etc/init.d/haproxy #修改后的脚本
#!/bin/sh
# chkconfig: - 85 15
# description: HA-Proxy server
# processname: haproxy
# config: /usr/local/haproxy/etc/haproxy.cfg
# pidfile: /usr/local/haproxy/run/haproxy.pid
# Source function library.
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ] ; then
. /etc/rc.d/init.d/functions
else
exit 0
fi
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
# This is our service name
BASENAME=`haproxy`
BIN=/usr/sbin/haproxy
CFG=/usr/local/haproxy/etc/haproxy.cfg
[ -f $CFG ] || exit 1
PIDFILE=/usr/local/haproxy/run/haproxy.pid
LOCKFILE=/usr/local/haproxy/run/haproxy
RETVAL=0
start() {
quiet_check
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with '$BASENAME check'."
return 1
fi
echo -n "Starting $BASENAME: "
daemon $BIN -D -f $CFG -p $PIDFILE
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch $LOCKFILE
return $RETVAL
}
stop() {
echo -n "Shutting down $BASENAME: "
killproc $BASENAME -USR1
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $LOCKFILE
[ $RETVAL -eq 0 ] && rm -f $PIDFILE
return $RETVAL
}
restart() {
quiet_check
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with '$BASENAME check'."
return 1
fi
stop
start
}
reload() {
if ! [ -s $PIDFILE ]; then
return 0
fi
quiet_check
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with '$BASENAME check'."
return 1
fi
$BIN -D -f $CFG -p $PIDFILE -sf $(cat $PIDFILE)
}
check() {
$BIN -c -q -V -f $CFG
}
quiet_check() {
$BIN -c -q -f $CFG
}
rhstatus() {
status $BASENAME
}
condrestart() {
[ -e $LOCKFILE ] && restart || :
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reload)
reload
;;
condrestart)
condrestart
;;
status)
rhstatus
;;
check)
check
;;
*)
echo $"Usage: $BASENAME {start|stop|restart|reload|condrestart|status|check}"
exit 1
esac
exit $?
复制haproxy文件到/usr/sbin下
因为上面的haproxy.init启动脚本默认会去/usr/sbin下找
#cp /usr/local/haproxy/sbin/haproxy /usr/sbin/
创建目录和权限
# mkdir -p /usr/local/haproxy/run
# chown nobody /usr/local/haproxy/ -R
配置日志收集
# vim /etc/rsyslog.conf #打开以下两行的注释，不打开收不到日志
$ModLoad imudp #取消注释
$UDPServerRun 514 #取消注释
local7.* /var/log/boot.log #下面添加两行
local3.* /var/log/haproxy.log
local0.* /var/log/haproxy.log
# systemctl restart rsyslog
3. 启动和停止服务
特殊启动方法1
# /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/etc/haproxy.cfg
查看状态：
# ps -axu | grep haproxy
nobody 3871 0.0 0.0 12228 1036 ? Ss 21:53 0:00 /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/etc/haproxy.cfg
# netstat -antup | grep 80
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 3871/haproxy
##停止
# killall haproxy #没有killall命令？安装yum -y install psmisc
HAproxy脚本启动方法2
# /etc/init.d/haproxy start 或 systemctl restart haproxy
