sometimes we have to deploy karaf in active/passive but without availability of shared filesystem in datacenter or database for locking.
we develop custom socket based lock system for karaf but it only work for two servers. After searching lot we find one solution GlusterFS. For complete instruction you can find here https://imranrazakh.blogspot.com/2018/08/ -- Sent from: http://karaf.922171.n3.nabble.com/Karaf-User-f930749.html