在CentOS系统中,实现PHP负载均衡通常涉及以下几个步骤:
安装和配置Web服务器:
安装和配置PHP-FPM:
配置负载均衡器:
sudo yum install epel-release
sudo yum install nginx
sudo systemctl start nginx
sudo systemctl enable nginx
编辑Nginx配置文件(通常位于/etc/nginx/nginx.conf
或/etc/nginx/conf.d/default.conf
),添加负载均衡配置:
http {
upstream php_backend {
server unix:/tmp/php-fpm.sock;
server unix:/tmp/php-fpm2.sock;
# 添加更多PHP-FPM实例
}
server {
listen 80;
location ~ \.php$ {
fastcgi_pass php_backend;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_path_info;
}
}
}
编辑PHP-FPM配置文件(通常位于/etc/php-fpm.d/www.conf
),确保监听Unix套接字:
listen = /tmp/php-fpm.sock
listen.owner = nginx
listen.group = nginx
重启PHP-FPM服务:
sudo systemctl restart php-fpm
sudo yum install haproxy
sudo systemctl start haproxy
sudo systemctl enable haproxy
编辑HAProxy配置文件(通常位于/etc/haproxy/haproxy.cfg
),添加负载均衡配置:
global
log /dev/log local0
log /dev/log local1 notice
daemon
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
frontend http_front
bind *:80
default_backend http_back
backend http_back
balance roundrobin
server php1 unix:/tmp/php-fpm.sock check
server php2 unix:/tmp/php-fpm2.sock check
# 添加更多PHP-FPM实例
与Nginx配置相同,确保PHP-FPM监听Unix套接字。
通过以上步骤,你可以在CentOS系统中使用Nginx或HAProxy实现PHP负载均衡。选择哪种负载均衡器取决于你的具体需求和环境。Nginx通常用于静态内容和反向代理,而HAProxy则更适合复杂的负载均衡场景。