概述
安装
# tar -xvf haproxy-2.0.14.tar.gz
# uname -r
3.10.0-1062.18.1.el7.x86_64
# cd haproxy-2.0.14
#编译 uname -r #查看系统内核版本号
#make TARGET=linux3100 CPU=x86_64 PREFIX=/usr/local/haprpxy
#安装
# make install PREFIX=/usr/local/haproxy
初始化Haproxy
# mkdir -p /var/lib/haproxy/
#创建配置文件目录
mkdir -p /usr/local/haproxy/conf
#创建配置文件目录
mkdir -p /etc/haproxy
#创建配置文件
touch /usr/local/haproxy/conf/haproxy.cfg
#添加配置文件软连接
ln -s /usr/local/haproxy/conf/haproxy.cfg /etc/haproxy/haproxy.cfg
#创建日志文件目录
mkdir -p /usr/local/haproxy/log
#创建日志文件
touch /usr/local/haproxy/log/haproxy.log
#添加软连接
ln -s /usr/local/haproxy/log/haproxy.log /var/log/haproxy.log
#拷贝开机启动文件
cp /opt/soft/haproxy-2.0.14/examples/haproxy.init /etc/rc.d/init.d/haproxy
#添加脚本执行权限
chmod +x /etc/rc.d/init.d/haproxy
#设置开机启动
chkconfig haproxy on
#添加软连接
ln -s /usr/local/haproxy/sbin/haproxy /usr/sbin
配置haproxy.cnf参数(数据库读写分离)
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /usr/local/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
#user haproxy
#group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode tcp
log global
option tcplog
option dontlognull
option http-server-close
# option forwardfor except 127.0.0.0/8
option redispatch
timeout connect 60s
timeout client 60m
timeout server 60m
maxconn 3000
listen MySQL_READ
bind 0.0.0.0:3306
mode tcp
#option httpchk
balance leastconn
#server node145 172.16.208.145:3306 check port 3306 inter 2000 rise 3 fall 3
server node147 172.16.208.147:3306 check port 3306 weight 1 inter 3000 rise 3 fall 3
server node148 172.16.208.148:3306 check port 3306 weight 1 inter 3000 rise 3 fall 3
listen MySQL_WRITE
bind 0.0.0.0:23306
mode tcp
#option httpchk
balance leastconn
server node145 172.16.208.145:3306 check port 3306 inter 2000 rise 3 fall 3
server node147 172.16.208.147:3306 check port 3306 inter 3000 rise 3 fall 3 backup
server node148 172.16.208.148:3306 check port 3306 inter 3000 rise 3 fall 3 backup
#listen MDB
# bind 0.0.0.0:6379
# option tcp-check
# tcp-check connect
# tcp-check send PINGrn
# tcp-check expect string +PONG
# tcp-check send info replicationrn
# tcp-check expect string role:master
# tcp-check send QUITrn
# tcp-check expect string +OK
# server R10 10.118.36.10:6379 check inter 3s
# server R74 10.118.36.74:6379 check inter 3s
# server R161 10.118.5.161:6379 check inter 3s
listen stats
mode http
bind 0.0.0.0:80
stats enable
stats uri /dbs
stats refresh 30s
stats realm Global statistics
stats auth admin:xxxx
启动服务
chmod 775 /etc/init.d/haproxy
# service haproxy start
# service haproxy reload
页面登录
http://47.114.43.240/dbs
帐号:admin
密码: xxxx
数据库连接测试(查看节点的信息)
[root@redis-server1 conf]# mysql -uroot -p -h 172.16.208.144
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 147
Server version: 10.4.12-MariaDB-log MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
MariaDB [(none)]> show variables like 'wsrep_node_address';
+--------------------+----------------+
| Variable_name | Value |
+--------------------+----------------+
| wsrep_node_address | 172.16.208.145 |
|
|
|
参数优化
server web1 10.1.1.1:80 cookie server1 weight 6 check inter 2000 rise 2 fall 3 表示：
server用于定义多台后端真实服务器，不能用于frontend和listen段
格式如下：
server name address :[port] [param*]
name: 为后端真实服务器指定一个内部名称，随便定义一个即可
address:port : 指定后端服务器的IP地址及端口
param*参数
常用的参数：
check 表示启用对此后端服务器执行健康状态检查
inter 设置健康状态检查的时间间隔，单位是毫秒
rise 检查多少次认为服务器可用
fall 检查多少次认为服务器不可用
weight 设置服务器的权重，默认为1， 最大为256。 设置为0表示不参与负载均衡
backup 设置备份服务器，用于所有后端服务器全部不可用时
cookie 为指定的后端服务器设置cookie值，此处指定的值将在请求入站时被检查，第一次为此值挑选的后端服务器将在后续的请求中一直被选中，其目的在于实现持久连接的功能
最后
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