如何在Nginx日志中记录反向代理上游服务器服务请求？

Question

upstream frontends {
  server 127.0.0.1:8000;
  server 127.0.0.1:8001;
  server 127.0.0.1:8002;
  [...]
}

server {
  location / {
    proxy_pass http://frontends;
    [...]
  }
  [...]
}

Answer 1

首先添加新的日志记录格式

log_format upstreamlog '[$time_local] $remote_addr - $remote_user - $server_name $host to: $upstream_addr: $request $status upstream_response_time $upstream_response_time msec $msec request_time $request_time';

输出示例：

[18/Nov/2019:10:08:15 -0700] <request IP> - - - <config host> <request host> to: 127.0.0.1:8000: GET /path/requested HTTP/1.1 200 upstream_response_time 0.000 msec 1574096895.474 request_time 0.001

然后将accesslog重新定义为

access_log /var/log/nginx/access.log upstreamlog;