日常抽风系列

• nginx: [emerg] still could not bind()
• nginx: [error] open() "/run/nginx.pid" failed (2: No such file or directory)

处理方式（简单粗暴）：

killall -9 nginx
systemctl restart nginx

报文过短

抽风症状：

后端接口可以访问，网页访问 413.

解决方式：

client_max_body_size 20m;