连接到Unix:/var/run/php5-fpm.sock失败.我的设置有什么问题? [英] Connect to unix:/var/run/php5-fpm.sock failed. What is wrong with my setup?

问题描述

我在DigitalOcean上具有2GB的VPS，并且正在Debian 7下使用NGINX，php-fpm和unix套接字托管WordPress 3.9.1.

I have a 2GB VPS on DigitalOcean and I am hosting WordPress 3.9.1 under Debian 7 with NGINX, php-fpm and unix socket.

运行良好，直到上周它开始显示"502网关错误"错误.我检查了日志，发现:

It was working perfectly until last week it started showing a "502 bad gateway" error. I checked the logs and found that:

php5-fpm日志显示已达到pm.max_children并 nginx日志显示以下内容:

php5-fpm log is showing pm.max_children was reached and nginx log is showing the following:

[错误] 3239#0:* 15188与unix的connect():/var/run/php5-fpm.sock在连接到上游，客户端:xxx.xxx.xxx.xxx时失败(11:资源暂时不可用) ，服务器:my.domain，请求:"POST/xmlrpc.php HTTP/1.0"，上游:"fastcgi://unix:/var/run/php5-fpm.sock:"，主机:"xxx.xxx.xxx" .xxx"

[error] 3239#0: *15188 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: xxx.xxx.xxx.xxx, server: my.domain, request: "POST /xmlrpc.php HTTP/1.0", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "xxx.xxx.xxx.xxx"

我用不同的设置手动更改了pm，但没有运气.每次更改后，我总是重新启动守护程序.

I manually changed pm with different settings with no luck. I always restart the daemons after every change.

pm设置为:

pm = dynamic 
pm.max_children = 100 
pm.start_servers = 10 
pm.min_spare_servers = 10 
pm.max_spare_servers = 10 
pm.max_requests = 200

www.conf启用了listen = /var/run/php5-fpm.sock.

有类似经历的人吗?

推荐答案

第一个问题是您指定100个max_children，这对于2GB来说确实很高.我会把它丢给25个孩子.在这里查看我的帖子，了解如何针对您的设置优化php-fpm配置:

The first problem is you are specifying 100 max_children, that is awfully high for 2GB. I would drop it to 25 children. See my post here on how to optimise your php-fpm configuration for your setup:

此外，使用unix套接字的速度稍快一些，因为它为您提供了直接的网络访问权限，而没有任何TCP/IP开销.不利的一面是，它的可扩展性不如TCP/IP.当套接字耗尽时，Nginx将抛出502错误.在这种情况下，您可以调整OS设置以适应更大的连接池，也可以切换到TCP/IP.

Also, using unix sockets is slightly faster since it provides you direct network access without any TCP/IP overhead. On the down side, it is not as scalable as TCP/IP. Nginx will throw 502 errors when the sockets have been depleted. In such a case you can either tweak the OS settings to accommodate the larger connection pool or just switch to switch to TCP/IP.

在您的fastcgi conf更改中:

In your fastcgi conf change:

fastcgi_pass unix:/var/run/php5-fpm.sock;

收件人:

fastcgi_pass 127.0.0.1:9000;

请注意，端口9000是php-fpm中设置的默认端口，如果您已将php-fpm更改为侦听另一个端口，则用该值交换9000.确保重新启动php-fpm和nginx.

Note that port 9000 is the default port set in php-fpm, if you have changed php-fpm to listen on another port then swap 9000 with that value. Make sure you restart both php-fpm and nginx.

现在，如果完成所有这些操作后，您仍然无法使它正常工作，并且 free -m 返回高内存使用率，那么该是时候向服务器中添加更多ram了.

Now, if after all of this, you still cannot get it to work and free -m returns high memory usage, then it is time to add more ram to your server.

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