tcp-proxy

A small TCP tee proxy written in Go. Idea is to bifurcate every tcp connection to the proxy and send to two remote backends. The response from the second remote is discarded while the response from the first remote is sent back to the client.

Install

$ git clone https://github.com/samitpal/go-tcp-proxy.git

$ go build -o tcp-proxy cmd/tcp-proxy/main.go

Usage

$ ./tcp-proxy --help
Usage of ./tcp-proxy:
  -c	output ansi colors
  -h	output hex
  -k	tcp keepAlive
  -l string
    	local address (default ":9999")
  -n	disable nagles algorithm
  -r1 string
    	first remote address. The client gets response back only from the first remote. (default "localhost:80")
  -r2 string
    	second remote address. The proxy discards the response from this remote (default "localhost:8080")
  -v	display server actions
  -vv
    	display server actions and all tcp data

Simple Example

We can use tcp-proxy to send traffic to two redis backends listening at localhost:6379 and localhost:7379:

$ tcp-proxy -r1 localhost:6379 -r2 localhost:7379
go-tcp-proxy (0.0.1) proxing from :9999 to localhost:6379 and localhost:7379

Then test with redis-cli:

$ redis-cli -p 9999 set test 123