部署nginx+php测试显示404日志报"FastCGI sent in stderr: "Primary script unknown""

故障现象

• 测试页index.php报404
• nginx错误日志

2020/04/17 17:11:09 [error] 4397#0: *3 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: 192.168.137.1, server: localhost, request: "GET /index.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "192.168.137.128"

故障分析

• nginx目录结构

.
├── conf.d
│   └── test.conf
├── fastcgi.conf
├── fastcgi.conf.default
├── fastcgi_params
├── fastcgi_params.default
├── nginx.conf

• nginx.conf配置

user nginx nginx;
worker_processes  auto;
worker_rlimit_nofile 65535;
events {
    worker_connections 65535;
    multi_accept on;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    include       conf.d/*.conf;
}

• test.conf配置

server {
        listen       80;
        server_name  localhost;
  
        location ~ \.php$ {
            root html;
            index index.php;
            fastcgi_pass 127.0.0.1:9000;
            include /home/nginx/nginx/conf/fastcgi.conf;
        }       

        location / {
            root   html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }

• 网上都说nginx配置文件要加

fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name;

• 实际我的配置中include文件fastcgi.conf已经包含了这个变量，此配置不是故障原因

解决方法

• yum方式安装php-fpm默认使用apache用户启动
• nginx使用的nginx用户启动
• 导致php-fpm与nginx权限不一致
• 修改php-fpm配置文件，改为nginx用户启动
• /etc/php-fpm.d/www.conf

user = nginx
group = nginx

• 重启php-fpm和nginx,故障修复