PHPackages mt-olympus/metis - PHPackages - PHPackages [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register) 1. [Directory](/) 2. / 3. [HTTP & Networking](/categories/http) 4. / 5. mt-olympus/metis ActiveLibrary[HTTP & Networking](/categories/http) mt-olympus/metis ================ Load Balance implementation in PHP 1.1.1(6y ago)024.3kMITPHPPHP ^7.1 Since Dec 14Pushed 6y ago1 watchersCompare [ Source](https://github.com/mt-olympus/metis)[ Packagist](https://packagist.org/packages/mt-olympus/metis)[ Docs](https://github.com/mt-olympus/metis)[ RSS](/packages/mt-olympus-metis/feed)WikiDiscussions master Synced 4w ago READMEChangelogDependencies (4)Versions (10)Used By (0) Metis ===== [](#metis) Introduction ------------ [](#introduction) This is a Dynamic Routing and Load Balance library made with PHP. It's goal is to "choose" an endpoint to connect to in distributed systems, like in a micro service architeture. You can use this library with [Athena](https://github.com/mt-olympus/athena) server, that can returns more than one server and use this module to choose one of them based on some rules and statistics about the servers. You can inject a Metis instance to a [Hermes](https://github.com/mt-olympus/hermes), and it will automatically choose a server to connect to. More info on the Hermes documentation. Components ---------- [](#components) - Service list - Rule ### Service list [](#service-list) - Static: from a configuration file - Fetched: from a remote server The fetched method is available through one of the following libraries: - [metis-athena](https://github.com/mt-olympus/metis-athena): Fetches the list from a [Athena](https://github.com/mt-olympus/athena) (Service Discovery) service - [metis-demeter](https://github.com/mt-olympus/metis-demeter): Fetches the list from a [Demeter](https://github.com/mt-olympus/demeter) (Distributed Configuration) service #### Static server list [](#static-server-list) The list is an well formed array: ``` return [ 'metis' => [ 'services' => [ 'service1' => [ // a unique service identification [ 'host' => 'server1', 'uri' => 'http://192.168.1.2/v1/service1', ], [ 'host' => 'server2', 'uri' => 'https://server2/v1/service1', ], [ 'host' => 'server3', 'uri' => 'https://server3.mycompany.com:7001/v1/service1', ], ], 'service2' => [ // a unique service identification [ 'host' => 'server1', 'uri' => 'http://192.168.1.2:7002/v1/service2', ], ], ], ], ]; ``` ### Strategy [](#strategy) Regardless the chosen strategy, if there is a [Cerberus](https://github.com/mt-olympus/cerberus) (Circuit Breaker) attached, the unavailable services will be filtered. - RoundRobin: Cycles among the services in a specific order - Random: Each time will select a random service from the list - ResponseTime: Each service has it's response time measured and this time is weighted. The faster service have more probability to be chosen. Installation ------------ [](#installation) ``` composer require mt-olympus/metis ``` ### Zend Expressive [](#zend-expressive) Just copy the `config/metis.global.php.dist` to your expressive project as config/autoload/metis.global.php ### Zend Framework [](#zend-framework) Include the module in your application.config.php ### Health Score 31 — LowBetter than 66% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity20 Limited adoption so far Community7 Small or concentrated contributor base Maturity64 Established project with proven stability Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~220 days Recently: every ~375 days Total 8 Last Release 2307d ago Major Versions 0.9.3 → 1.0.02016-07-22 PHP version history (3 changes)0.9.0PHP ^5.5|^7.0 1.0.0PHP ^5.6 || ^7.0 1.1.0PHP ^7.1 ### Community Maintainers ![](https://www.gravatar.com/avatar/5b54dffc1ebcb317a0cf825a781ab6c5f30980e9abd0d0a3f9c68830cb05c014?d=identicon)[Lansoweb](/maintainers/Lansoweb) --- Top Contributors [![Lansoweb](https://avatars.githubusercontent.com/u/2109813?v=4)](https://github.com/Lansoweb "Lansoweb (21 commits)") ### Embed Badge ![Health badge](/badges/mt-olympus-metis/health.svg) ``` [![Health](https://phpackages.com/badges/mt-olympus-metis/health.svg)](https://phpackages.com/packages/mt-olympus-metis) ``` ### Alternatives [magento/community-edition Magento 2 (Open Source) 12.1k53.0k12](/packages/magento-community-edition)[laminas/laminas-validator Validation classes for a wide range of domains, and the ability to chain validators to create complex validation criteria 16348.2M212](/packages/laminas-laminas-validator)[laminas/laminas-router Flexible routing system for HTTP and console applications 3521.9M74](/packages/laminas-laminas-router)[wheelpros/fitment-platform-api Magento 2 (Open Source) 12.1k1.2k](/packages/wheelpros-fitment-platform-api)[shlinkio/shlink A self-hosted and PHP-based URL shortener application with CLI and REST interfaces 5.1k4.9k](/packages/shlinkio-shlink)[mezzio/mezzio-tooling Migration and development tooling for Mezzio 191.2M22](/packages/mezzio-mezzio-tooling) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)