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1,882 symbols 5,530 edges 320 files 473 documented · 25% ● updated 4mo agocellar-4.4.8 · 2025-09-12★ 51

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README

Apache Karaf Cellar

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

Overview

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/4.4.8/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:

https://karaf.apache.org/projects.html

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

https://karaf.apache.org/community.html

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

http://issues.apache.org/jira/browse/KARAF

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:

https://karaf.apache.org/community.html

Thanks for using Apache Karaf Decanter !

The Apache Karaf Team

Extension points exported contracts — how you extend this code

Handler (Interface)

Generic handler. [20 implementers]

core/src/main/java/org/apache/karaf/cellar/core/Handler.java

Greeter (Interface)

Interface describing the Greeter service. [2 implementers]

samples/dosgi-greeter/api/src/main/java/org/apache/karaf/cellar/samples/dosgi/greeter/api/Greeter.java

ServiceMBean (Interface)

Describe the attributes and operations on the Cellar service MBean. [2 implementers]

dosgi/src/main/java/org/apache/karaf/cellar/dosgi/management/ServiceMBean.java

CellarFeaturesMBean (Interface)

Describe the operations and attributes on the Cellar Features MBean. [2 implementers]

features/src/main/java/org/apache/karaf/cellar/features/management/CellarFeaturesMBean.java

CellarLogMBean (Interface)

Describe the operations and attributes on the CellarLogMBean. [2 implementers]

log/src/main/java/org/apache/karaf/cellar/log/management/CellarLogMBean.java

CellarOBRMBean (Interface)

Describe the operations and attributes of the Cellar OBR MBean. [2 implementers]

obr/src/main/java/org/apache/karaf/cellar/obr/management/CellarOBRMBean.java

CellarBundleMBean (Interface)

Describe the operations and attributes on the Cellar bundle MBean. [2 implementers]

bundle/src/main/java/org/apache/karaf/cellar/bundle/management/CellarBundleMBean.java

CellarConfigMBean (Interface)

Describe the operations and attributes available on the Cellar configuration MBean. [2 implementers]

config/src/main/java/org/apache/karaf/cellar/config/management/CellarConfigMBean.java

Core symbols most depended-on inside this repo

get

called by 218

etcd/src/main/java/org/apache/karaf/cellar/etcd/internal/EtcdService.java

getName

called by 181

core/src/main/java/org/apache/karaf/cellar/core/control/Switch.java

getNode

called by 111

core/src/main/java/org/apache/karaf/cellar/core/GroupManager.java

equals

called by 107

core/src/main/java/org/apache/karaf/cellar/core/Group.java

getStatus

called by 85

core/src/main/java/org/apache/karaf/cellar/core/control/Switch.java

getId

called by 81

core/src/main/java/org/apache/karaf/cellar/core/Node.java

getMap

called by 80

core/src/main/java/org/apache/karaf/cellar/core/ClusterManager.java

getLogger

called by 70

log/src/main/java/org/apache/karaf/cellar/log/GetLogCommand.java

Shape

Method 1,526

Class 290

Interface 33

Function 27

Enum 6

Languages

Java99%

TypeScript1%

Modules by API surface

kubernetes/src/main/java/org/apache/karaf/cellar/kubernetes/KubernetesDiscoveryService.java61 symbols

hazelcast/src/main/java/org/apache/karaf/cellar/hazelcast/HazelcastGroupManager.java42 symbols

bundle/src/main/java/org/apache/karaf/cellar/bundle/management/internal/CellarBundleMBeanImpl.java29 symbols

features/src/main/java/org/apache/karaf/cellar/features/management/internal/CellarFeaturesMBeanImpl.java26 symbols

cloud/src/main/java/org/apache/karaf/cellar/cloud/BlobStoreDiscoveryService.java23 symbols

http/balancer/src/main/java/org/apache/karaf/cellar/http/balancer/CellarBalancerProxyServlet.java22 symbols

hazelcast/src/main/java/org/apache/karaf/cellar/hazelcast/QueueConsumer.java22 symbols

hazelcast/src/main/java/org/apache/karaf/cellar/hazelcast/management/internal/CellarMBeanImpl.java21 symbols

hazelcast/src/main/java/org/apache/karaf/cellar/hazelcast/TopicConsumer.java19 symbols

config/src/main/java/org/apache/karaf/cellar/config/management/internal/CellarConfigMBeanImpl.java19 symbols

config/src/main/java/org/apache/karaf/cellar/config/ConfigurationSupport.java19 symbols

obr/src/main/java/org/apache/karaf/cellar/obr/management/internal/CellarOBRMBeanImpl.java17 symbols

For agents

$ claude mcp add karaf-cellar \
  -- python -m otcore.mcp_server <graph>

⬇ download graph artifact