haproxy配置负载均衡
haproxy介绍
HAProxy 提供高可用性、负载均衡以及基于 TCP 和 HTTP 应用的代理,支持虚拟主机,它是免费、快速并且可靠的一种解决方案.HAProxy 特别适用于那些负载特大的 web 站点, 这些站点通常又需要会话保持或七层处理.HAProxy 运行在当前的硬件上,完全可以支持数以万计的并发连接.并且它的运行模式使得它可以很简单安全的整合进您当前的架构中, 同时可以保护你的 web 服务器不被暴露到网络上.
haproxy安装
在RS配置httpd服务
[root@RS1 ~]# systemctl disable --now firewalld.service
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@RS1 ~]# getenforce
Disabled
[root@RS1 ~]# yum -y install httpd
[root@RS1 ~]# systemctl enable --now httpd
Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service → /usr/lib/systemd/system/httpd.service.
[root@RS1 ~]# echo "123" > /var/www/html/index.html
[root@RS2 ~]# systemctl disable --now firewalld.service
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@RS2 ~]# getenforce
Disabled
[root@RS2 ~]# yum -y install httpd
[root@RS2 ~]# systemctl enable --now httpd
Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service → /usr/lib/systemd/system/httpd.service.
[root@RS2 ~]# echo "456" > /var/www/html/index.html
配置DR
[root@DR ~]# systemctl disable --now firewalld.service
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@DR ~]# getenforce
Disabled
安装服务
[root@DR ~]# yum -y install openssl make gcc pcre-devel bzip2-devel openssl-devel systemd-devel
创建用户
[root@DR ~]# useradd -r -M -s /sbin/nologin haproxy
上传压缩包
[root@DR ~]# ls
公共 视频 文档 音乐 anaconda-ks.cfg initial-setup-ks.cfg
模板 图片 下载 桌面 haproxy-2.4.0.tar.gz
解压压缩包
[root@DR ~]# tar xf haproxy-2.4.0.tar.gz
[root@DR ~]# ls
公共 视频 文档 音乐 anaconda-ks.cfg haproxy-2.4.0.tar.gz
模板 图片 下载 桌面 haproxy-2.4.0 initial-setup-ks.cfg
[root@DR haproxy-2.4.0]# ls
addons CHANGELOG doc include MAINTAINERS reg-tests src VERDATE
admin CONTRIBUTING examples INSTALL Makefile ROADMAP SUBVERS VERSION
BRANCHES dev haproxy LICENSE README scripts tests
[root@DR haproxy-2.4.0]# make clean
[root@DR haproxy-2.4.0]# make -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_PCRE=1 USE_SYSTEMD=1 //过程省略
[root@DR haproxy-2.4.0]# make install PREFIX=/usr/local/haproxy
配置内核参数
[root@DR ~]# echo 'net.ipv4.ip_nonlocal_bind = 1' >> /etc/sysctl.conf
[root@DR ~]# echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
[root@DR ~]# sysctl -p
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
提供配置文件
[root@DR ~]# mkdir /etc/haproxy
[root@DR ~]# cd /etc/haproxy/
[root@DR haproxy]# cat > /etc/haproxy/haproxy.cfg <<EOF
#--------------全局配置----------------
global
log 127.0.0.1 local0 info
#log loghost local0 info
maxconn 20480
#chroot /usr/local/haproxy
pidfile /var/run/haproxy.pid
#maxconn 4000
user haproxy
group haproxy
daemon
#---------------------------------------------------------------------
#common defaults that all the 'listen' and 'backend' sections will
#use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option dontlognull
option httpclose
option httplog
#option forwardfor
option redispatch
balance roundrobin
timeout connect 10s
timeout client 10s
timeout server 10s
timeout check 10s
maxconn 60000
retries 3
#--------------统计页面配置------------------
listen admin_stats
bind 0.0.0.0:8189
stats enable
mode http
log global
stats uri /haproxy_stats
stats realm Haproxy\ Statistics
stats auth admin:admin
#stats hide-version
stats admin if TRUE
stats refresh 30s
#---------------web设置-----------------------
listen webcluster
bind 0.0.0.0:80
mode http
#option httpchk GET /index.html
log global
maxconn 3000
balance roundrobin
cookie SESSION_COOKIE insert indirect nocache
server web01 192.168.145.170:80 check inter 2000 fall 5
#server web02 192.168.145.171:80 cookie web01 check inter 2000 fall 5
EOF
haproxy.service文件编写
[root@DR ~]# cat > /usr/lib/systemd/system/haproxy.service <<EOF
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target
[Service]
ExecStartPre=/usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg -c -q
ExecStart=/usr/local/haproxy/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID
[Install]
WantedBy=multi-user.target
EOF
[root@DR ~]# systemctl daemon-reload
开启日志
[root@DR ~]# vim /etc/rsyslog.conf
local0.* /var/log/haproxy.log 加入此行
设置开机自启
[root@DR ~]# systemctl enable --now haproxy
Created symlink /etc/systemd/system/multi-user.target.wants/haproxy.service → /usr/lib/systemd/system/haproxy.service.
[root@DR ~]# systemctl status haproxy.service
● haproxy.service - HAProxy Load Balancer
Loaded: loaded (/usr/lib/systemd/system/haproxy.service; enabled; vendor preset: >
Active: active (running) since Mon 2021-10-18 02:01:59 CST; 5s ago
Process: 106583 ExecStartPre=/usr/local/haproxy/sbin/haproxy -f /etc/haproxy/hapro>
Main PID: 106585 (haproxy)
Tasks: 2 (limit: 23862)
Memory: 7.7M
CGroup: /system.slice/haproxy.service
├─106585 /usr/local/haproxy/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg >
└─106588 /usr/local/haproxy/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg >
10月 18 02:01:59 DR systemd[1]: Starting HAProxy Load Balancer...
10月 18 02:01:59 DR systemd[1]: Started HAProxy Load Balancer.
10月 18 02:01:59 DR haproxy[106585]: [NOTICE] (106585) : New worker #1 (106588) fo>
[root@DR ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 32 192.168.122.1:53 0.0.0.0:*
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 5 127.0.0.1:631 0.0.0.0:*
LISTEN 0 128 0.0.0.0:8189 0.0.0.0:*
LISTEN 0 128 0.0.0.0:111 0.0.0.0:*
LISTEN 0 128 0.0.0.0:80 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 5 [::1]:631 [::]:*
LISTEN 0 128 [::]:111 [::]:*
