log

• https://nginx.org/en/docs/http/ngx_http_log_module.html
• 就近原则：location的不会使用http的
• 目录必须手动创建

access_log

• 开启：access_log path [format [buffer=size] [gzip[=level]] [flush=time] [if=condition]];
• 关闭：access_log off;
• 默认：access_log logs/access.log combined;

error_log

• error_log file [level];
• 默认：error_log logs/error.log error;
• level：debug, info, notice, warn, error, crit, alert, or emerg.
  • debug需要以debug配置编译nginx
    • https://nginx.org/en/docs/debugging_log.html