darkhelmet / balance

Simple TCP load balancer in Go

balance

Simple TCP/HTTP/HTTPS load balancer in Go

Install

go get github.com/darkhelmet/balance

Usage

# Simple tcp mode
balance tcp -bind :4000 localhost:4001 localhost:4002

# HTTP mode
balance http -bind :4000 localhost:4001 localhost:4002

# HTTPS mode
balance https -bind :4000 -cert ssl.crt -key ssl.key localhost:4001 localhost:4002

License

GNU AGPL, see LICENSE file.

balance's Issues

Status output, see what's going on with a running balancer

Human readable and JSON

Want to show total number of request to load balancer

I am newbie golang, this project is great.
And I want to reuse this to add a function to show total number of request to load balancer.
How can i do this?

TCP health checks

Make X-Real-Ip optional

pass ip through LB

is it possible to obtain the IP requesting the LB with the api balance server endpoints? currently when i make a request to the LB the ip address being used in the api servers is that of the load balancer. Im using the tcp balancer. Maybe this is something that should be done with curl?

Append string to tcp uri

As per our discussion yesterday, id like to append the ip address to the uri being passed to the server instances in the tcp balancer. How do i accomplish that? I can generate the IP but i need to know how to modify the uri

Virtual host support for HTTP and HTTPS

Allow adding and removing hosts dynamically

JSON RPC or something on a local socket, maybe use http://godoc.org/github.com/hawx/hadfield to do a Cmd type thing

connect: cannot assign requested address

This causes 502 errors to get returned to the client.

The error shows up when too many connections go into TIME_WAIT status. On my 10 core linux server vm, this was happening after 20,000 connections got in TIME_WAIT status.

START load balancer:

./balance https -cert server.crt -key server.key -bind server2:443 server1:8080

$ ./bombardier-linux-amd64 -c 1000 -n 100000 --cert server.crt --key server.key -k 'https://host/rest

Bombarding https://host/rest with 100000 request(s) using 1000 connection(s)
 100000 / 100000 [========================] 100.00% 35s
Done!

Statistics        Avg      Stdev        Max
  Reqs/sec      2952.75    3967.86   49817.90
  Latency      350.55ms   753.03ms      7.84s
  HTTP codes:
    1xx - 0, 2xx - 81879, 3xx - 0, 4xx - 0, 5xx - 18121
    others - 0
  Throughput:     1.13MB/s

ERRORS:

connect: cannot assign requested address

HTTP health checks