disbalance

disbalance - automagic load balancer

• Features
• Quick Start
• HTTPS
• How to test
• API
• Install

Created by gh-md-toc

Features

• Minimal required configuration. You are supposed to fire up disbalance and start using it.
• Configuration automatically kept as YAML file. You are not required to edit it by hand.
• Integrated web console. Use the web interface to quickly define load balancing rules.
• REST API. Use the API to dynamically combine the load balancer with other services.

Quick Start

Without Modules, before Go 1.11

# make sure GOPATH is either unset or set to ~/go
go get github.com/udhos/disbalance
cd ~/go/src/github.com/udhos/disbalance
./build-nomodules.sh
disbalance

With Modules, starting from Go 1.11

Warning: gopherjs currently can't build the 'console' application using Modules. See gopherjs/gopherjs#881.

git clone https://github.com/udhos/disbalance ;# clone outside of GOPATH
cd disbalance
./build-modules.sh ;# currently fails because gopherjs does not support Go Modules yet
disbalance

Then open http://localhost:8080/console

HTTPS

If you want to use TLS for the console, you will need a certificate:

openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout run/key.pem -out run/cert.pem

Then start disbalance and open https://localhost:8080/console

How to test

1. Run webservers on ports 8001 and 8002.

Example:

go get github.com/udhos/gowebhello

gowebhello -addr :8001 -disableKeepalive &
gowebhello -addr :8002 -disableKeepalive &

2. Then open the disbalance console http://localhost:8080/console and create a rule with targets for ports 8001 and 8002.

Create the rule with this information:

rule name: rule-1000
listener:  :8000
target:    localhost:8001
target:    localhost:8002

3. Visit http://localhost:8000.

Example:

curl http://localhost:8000

Your web traffic should be distributed between localhost:8001 and localhost:8002.

API

Get rule list:

curl -u admin:admin localhost:8080/api/rule/

Delete rule 'rule1':

curl -u admin:admin -X DELETE localhost:8080/api/rule/rule1

Create/update inline rule 'rule1':

curl -u admin:admin -X POST -d '{rule1: {listener: ":2000", protocol: tcp, targets: {2.2.2.2:80: {}}}}' localhost:8080/api/rule/

Replace inline rule 'rule1':

curl -u admin:admin -X PUT -d '{listener: ":3000", targets: {3.3.3.3:80: {}}}' localhost:8080/api/rule/rule1

Save rule list to file 'rules':

curl -u admin:admin localhost:8080/api/rule/ > rules

Load rule list from file 'rules':

curl -u admin:admin --data-binary @rules -X POST localhost:8080/api/rule/

Install

You can install disbalance as a systemd service by running the install.sh script:

sudo ./install.sh

sudo ./install.sh remove ;# this removes disbalance service from systemd

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