sockets - keepalive & fastcgi_keep_conn 开启时 Nginx+php-fpm 出错

Question

我正在尝试将 Nginx + php-fpm 与 nginx 选项“keepalive”和“fastcgi_keep_conn on”一起使用，以保持它们之间的 tcp 连接处于事件状态，但在服务数百个请求后面临错误“104:连接由对等方重置” .

这些错误在 php-fpm 在 tcp 端口 ( 9000 ) 或 unix 套接字 (/var/run/php5-fpm.socket ) 上启动时可见。

这里的意图是尽可能减少Nginx + php-fpm 之间新的tcp/socket 连接开销，并尽可能重用连接。请注意，我将 nginx 'keepalive 20' 设置为 php-fpm 'pm.max_requests = 0' & 'pm.start_servers = 50'。

谁能帮我解决这个错误？

正在使用的软件:

    nginx version: nginx/1.4.7
    php-fpm version: 5.4.25 / 5.6.6

PHP-FPM 错误日志条目:

    WARNING: [pool www] child 15388 exited on signal 15 (SIGTERM) after 2245.557110 seconds from start 
    NOTICE: [pool www] child 18701 started

Nginx 错误:

使用 php-fpm 监听端口 9000

    [error] 32310#0: *765 readv() failed (104: Connection reset by peer) while reading upstream, client: 10.10.133.xx, server: 192.168.28.xxx, request: "GET /test.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "10.10.133.xxx"

使用 php-fpm 监听套接字/var/run/php5-fpm.socket

    [error] 14894#0: *383 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 10.10.133.xx, server: 192.168.28.xxx, request: "GET /test.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.socket:", host: "10.10.133.xxx"

以下是 nginx 虚拟主机配置

    upstream fastcgi_backend {
        server 127.0.0.1:9000;
        #server unix:/var/run/php5-fpm.socket;
        keepalive 30;
    }
    server {
            listen  80;
            server_name 10.10.xxx.xxx;
            access_log /tmp/ngx_access_80.log;
            error_log /tmp/ngx_error_80.log;

            location ~ \.php$ {
                root           /var/www/test/;
                include        fastcgi_params;
                fastcgi_pass   fastcgi_backend; //upstream set above
                fastcgi_keep_conn on; #Test for keepalive connection to php-fpm
                fastcgi_buffer_size 16k;
                fastcgi_buffers 4 16k;
            }
    }

以下是php-fpm.conf

    [global]
    pid = /var/run/php-fpm-9000.pid
    error_log = /var/log/php-fpm-9000.log

    [www]
    listen = 0.0.0.0:9000
    user = daemon
    group = daemon
    rlimit_files = 60000

    pm = dynamic
    pm.max_requests = 0

    pm.max_children = 500
    pm.start_servers = 50
    pm.min_spare_servers = 40
    pm.max_spare_servers = 90 

Answer 1

您必须将 nginx keepalive_requests 和 php-fpm pm.max_requests 设置为相同的值以避免出现此错误

[error] recv() failed (104: Connection reset by peer) while reading response header from upstream

如果这两个值不匹配，则 nginx 或 php-fpm 最终会关闭连接，从而触发错误。