Mirror of Apache Karaf Cellar

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Apache Karaf Cellar

Apache Karaf Cellar is an Apache Karaf subproject. It provides a clustering solution for Apache Karaf powered by Hazelcast.


Cellar allows you to manage a cluster of several Karaf instances, providing synchronization between instances.

Here is a short list of features:

  • Discovery: when you install Cellar into a Karaf instance, it automatically tries to discover other Cellar instances and join the cluster. There is no configuration required to join the cluster, the discovery is made behind the scene. You can use multicast or unicast for discovery.
  • Cluster group: a Karaf node could be part of one or more cluster group. In Cellar, you can define cluster group depending on your requirements. The resources will be sync between nodes of the same group.
  • Distributed Configuration Admin: Cellar distributes the configuration data. The distribution is event driven and filtered by group. You can tune the configuration replication using blacklist/whitelist on the configuration ID (PID).
  • Distributed Features Service: Cellar distributes the features/repositories info. It's also event-driven.
  • Provisioning: Cellar provides shell commands for basic provisioning. It can also use an OBR backend or another provisioning tool such as Apache ACE.

Getting Started

For an Apache Karaf Cellar source distribution, please read BUILDING for instructions on building Apache Karaf.

To install Apache Karaf Cellar, first you have to register the Cellar features descriptor:

karaf@root()> feature:repo-add mvn:org.apache.karaf.cellar/apache-karaf-cellar/4.0.0/xml/features

Now, you can install the Cellar feature simply by typing:

karaf@root()> feature:install cellar

The PDF manual is the right place to find any information about Karaf Cellar.

Alternatively, you can also find out how to get started here:


If you need more help try talking to us on our mailing lists


If you find any issues with Apache Karaf, please submit reports with JIRA here:


We welcome contributions, and encourage you to get involved in the Karaf community. If you'd like to learn more about how you can contribute, please see:


Thanks for using Apache Karaf Decanter !

The Apache Karaf Team