Why I wrote this tool

Installation

$ go install github.com/kevwan/tproxy@latest

$ docker run --rm -it -p<listen-port>:<listen-port> -p<remote-port>:<remote-port> kevinwan/tproxy:v1 tproxy -l 0.0.0.0 -p<listen-port> -r host.docker.internal:<remote-port>

$ docker run --rm -it -p<listen-port>:<listen-port> -p<remote-port>:<remote-port> kevinwan/tproxy:v1-arm64 tproxy -l 0.0.0.0 -p<listen-port> -r host.docker.internal:<remote-port>

$ scoop install tproxy

Usages

$ tproxy --helpUsage of tproxy:  -d duration    the delay to relay packets  -down int    Downward speed limit(bytes/second)  -l string    Local address to listen on (default"localhost")  -p int    Local port to listen on, default to pick a random port  -qQuiet mode, only prints connection open/close and stats, defaultfalse  -r string    Remote address (host:port) to connect  -sEnable statistics  -t string    Thetype of protocol, currently support http2, grpc, redis and mongodb  -up int    Upward speed limit(bytes/second)

Examples

Monitor gRPC connections

$ tproxy -p 8088 -r localhost:8081 -t grpc -d 100ms

Monitor MySQL connections

$ tproxy -p 3307 -r localhost:3306

Check the connection reliability (Retrans rate and RTT)

$ tproxy -p 3307 -r remotehost:3306 -s -q

Learn the connection pool behaviors

$ tproxy -p 3307 -r localhost:3306 -q -s

Give a Star! ⭐