Example Load Balancer implementation made with PHP with usage of psr-7 standard.

• PHP 8.1
• Composer

git clone [email protected]:kisztof/Loadbalancer.git

composer install -a --no-dev

As second argument for LoadBalance constructor pass one of two implemented BalanceStrategies

$strategy = new \SlomkaPro\Loadbalancer\BalanceStrategy\RoundRobinStrategy();
$lb = new \SlomkaPro\Loadbalancer\LoadBalancer($hosts, $strategy)
$lb->handleRequest($request);

Available strategies:

\SlomkaPro\Loadbalancer\BalanceStrategy\RoundRobinStrategy::class;
\SlomkaPro\Loadbalancer\BalanceStrategy\LoadLimitStrategy::class;

To implement new strategy simply use interface

\SlomkaPro\Loadbalancer\BalanceStrategy\BalanceStrategy::class

git clone [email protected]:kisztof/Loadbalancer.git

composer install

Before committing changes simply hit

composer build

./vendor/bin/phpunit

or use simply composer script

composer tests

Dynamic load balancing algorithms

• Least connection
• Weighted least connection
• Weighted response time
• Resource-based

Static load balancing algorithms

• Round robin
• Weighted round robin
• IP hash

Example folder contains simulations for both balancing strategies and an implemented simulation process.

php examples/example_RR.php
php examples/example_LL.php