【问题标题】：nginx codeigniter 502 bad gatewaynginx codeigniter 502 网关错误
【发布时间】：2023-04-05 00:54:01
【问题描述】：

nginx的配置如下：

server {
        listen       80;
        server_name  www.example.com;

        root   /home/wwwroot/example.com;
        index index.php  index.html index.htm;

        location / {
                index  index.php index.html index.htm;
        }

        location ~ \.php($|/) {
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_split_path_info ^(.+\.php)(.*)$;
            fastcgi_param   PATH_INFO $fastcgi_path_info;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }

        if (!-e $request_filename) {
            rewrite ^/(.*)$ /index.php/$1 last;
            break;
        }

        location ~ /\.ht {
                deny  all;
        }
}

请给我一些建议，谢谢~

【问题讨论】：

您从哪里获得应用程序根目录上的502 bad gateway？
是的，在应用程序根目录
@RahilWazir 在应用程序根目录
@RahilWazir Centos5.7 X86_64
对于初学者，请确保 php 服务正在运行 ps -ef | grep php 和 sudo netstat -ntlp | grep 9000

标签： codeigniter nginx

【解决方案1】：

我终于自己做对了。

server {
    listen       80;
    server_name  example.com;

    root   /home/wwwroot/example.com;
    index index.php  index.html index.htm;

    location / {
    root /home/wwwroot/example.com;
            index  index.php index.html index.htm;
        if (!-e $request_filename) {
                rewrite ^/(.*)$ /index.php/$1 last;
                break;
        }
    }
    location ~ \.php($|/) {
        fastcgi_pass  unix:/tmp/php-cgi.sock;
        fastcgi_index  index.php;
        fastcgi_split_path_info ^(.+\.php)(.*)$;
        fastcgi_param   PATH_INFO $fastcgi_path_info;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }
    location ~ /\.ht {
            deny  all;
    }
}

【讨论】：

【解决方案2】：

请将下面一行添加到 Nginx 配置文件 /etc/nginx/nginx.conf 中

http {
    ...
    fastcgi_buffers 8 16k;
    fastcgi_buffer_size 32k;
    ...
}

reference

【讨论】：

【解决方案3】：

我在 Codeigniter + nginx 上也遇到了这个错误，但我已经通过更改代码解决了这个问题。问题在于会话。在会话中，我保存了 stdClass 对象。当我更改值或从会话中检索值时，它给了我 502 bad gateway。所以我将会话值更改为 Associative Array 然后我的问题就解决了。我认为会话存储值超过这就是服务器给出错误 502 bad gateway 的原因。

【讨论】：

【解决方案4】：

您在location / 中没有根（这可能没问题）
您缺少一些建议的参数

这是我运行并使用 CI (CentOS 6) 的 nginx 配置。它从 URL 中删除 index.php。它也是 SSL，但如果你不需要，你可以把那个垃圾拿出来。它至少应该为您指明正确的方向。

server {
    listen       80;
    server_name  _;
    access_log   /var/www/https/logs/access.log;
    error_log    /var/www/https/logs/error.log;
    return       301 https://www.example.com$request_uri;
}

server {
    listen 443 default_server ssl;
    server_name *.example.com;
    ssl on;
    ssl_certificate /var/www/ssl/wildcard.example.com.chained.crt;
    ssl_certificate_key /var/www/ssl/wildcard.example.com.key;
    ssl_verify_depth 3;
    access_log /var/www/https/logs/ssl/access.log;
    error_log /var/www/https/logs/ssl/error.log;

    #http://mailman.nginx.org/pipermail/nginx-announce/2013/000125.html
    if ($request_uri ~ " ") {
        return 444;
    }

    location /  {
        root   /var/www/https/;

        # file doesn't exist, let CI handle it
        if (!-f $request_filename) {
                rewrite ^(.*) /index.php?$1 last;
        }
    }

    location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico)$ {
        root              /var/www/https/;
        access_log        on;
        expires           30d;
    }

    location ~ \.php$ {
        include fastcgi.conf;#/etc/nginx/fastcgi.conf
        fastcgi_param SCRIPT_FILENAME /var/www/https$fastcgi_script_name;
    }
}


/etc/nginx/conf.d/fastcgi.conf:

fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_split_path_info ^(.+\.php)(.*)$;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;

fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param PATH_INFO $fastcgi_path_info;
fastcgi_param SERVER_PROTOCOL $server_protocol;

fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx/$nginx_version;

fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param REDIRECT_STATUS 200;

fastcgi_connect_timeout 60;
fastcgi_send_timeout 180;
fastcgi_read_timeout 180;
fastcgi_buffer_size 128k;
fastcgi_buffers 4 256k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_intercept_errors on;

fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

【讨论】：