Apache Karaf Cellar is able to sync the status of OSGi bundles on the cluster.

Thanks to the bundle listener, all actions that you may perform on a bundle are spread onto the cluster. You can also use dedicated cluster commands to manipulate the bundles on the cluster.

For instance, it's possible to see the bundles available on the cluster with their current status using the cluster:bundle-list command as follows:

karaf@node1> cluster:bundle-list default
Bundles in cluster group default
 ID      State     Name
[0   ] [Active] Apache Karaf :: Cellar :: Utils (2.3.1)
[1   ] [Active] Apache Karaf :: JAAS :: Config (2.3.3)
[2   ] [Active] Apache Karaf :: Diagnostic :: Command (2.3.3)
[3   ] [Active] Apache Karaf :: Deployer :: Spring (2.3.3)
[4   ] [Active] Apache Aries Proxy Service (1.0.1)
[5   ] ...