Karaf

Apache Karaf is a lightweight, modular, and dynamic runtime environment for OSGi-based applications, implemented in Java. It provides a robust and extensible container that simplifies the deployment, management, and hot-swapping of enterprise-grade Java components and services.

Key facts

First appeared: 2009
Category: technology
Problem solved: Karaf was created to simplify the development, deployment, and operational management of complex, modular Java applications built on the OSGi framework. It addressed the pain points of managing dependencies, classloading, configuration, and dynamic updates inherent in raw OSGi environments.
Platforms: Linux, Java Virtual Machine (JVM), Any OS supporting Java, Windows, macOS

Related technologies

Java EE (various components)
Apache CXF
Apache ServiceMix
OSGi Bundles
Apache Camel
Blueprint Container (OSGi standard)
Maven
Spring DM (now Spring OSGi)
Apache ActiveMQ

Notable users

Companies in aerospace and defense
Companies in telecommunications (e.g., Ericsson, Nokia for network elements)
Integrators leveraging Apache Camel and CXF
Financial services institutions