Question

how to find the load balancer log

I setup a load balancer with 1-click and attached 3 droplets to it. I want to know when a client made a request to the load balancer, which droplet it is connected to. I cannot find it when ssh into the droplet because the tcp connections only show the connection is from 127.0.0.1:[port].

Is there any way I can find out which droplet and which port the client is related?

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Hi there,

What you could do is to enable PROXY Protocol for the Load balancer.

The PROXY protocol is a way to send client connection information (like origin IP addresses and port numbers) to the final backend server rather than discarding it at the load balancer.

This information can be helpful for use cases like analyzing traffic logs or changing application functionality based on geographical IP.

You can do that by following the steps here:

https://www.digitalocean.com/docs/networking/load-balancers/#proxy-protocol

And then configure your Nginx or Apache services to accept PROXY protocol headers as described here:

https://www.digitalocean.com/docs/networking/load-balancers/resources/#proxy-protocol

Hope that this helps. Regards, Bobby