NGINX Cookbook

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Just like traditional HTTP based configurations, we can also enable access logs for TCP load balancing. We can tailor the logs to suit specific applications, which may include fields such as the client IP address, bytes sent, and bytes received.

This requires NGINX version 1.11.4 or higher.

To use the stream logging, we firstly need to define a log format. Here's a basic configuration:

log_format basic '$remote_addr [$time_local] ' 
                 '$bytes_sent $bytes_received $session_time'; 

Then, we add the access_log directive to our server block:

server { 
    listen     7400; 
    access_log  /var/log/nginx/tcp-access.log  basic; 
    proxy_pass tcpapppool; 
} 

This basic log format then gives us an output like this:

1.2.3.4 [28/Dec/2016:22:17:08 +1000] 18 ...