Ceph RADOS Mutex 7 ctdb CTDB - clustered TDB database ctdb_mutex_ceph_rados_helper Ceph RADOS cluster mutex helper ctdb_mutex_ceph_rados_helper can be used as a cluster lock provider for CTDB. When configured, split brain avoidance during CTDB recovery will be handled using locks against an object located in a Ceph RADOS pool. To enable this functionality, include the following line in the [cluster] section of ctdb.conf 5: cluster lock = !ctdb_mutex_ceph_rados_helper [Cluster] [User] [Pool] [Object] Cluster: Ceph cluster name (e.g. ceph) User: Ceph cluster user name (e.g. client.admin) Pool: Ceph RADOS pool name Object: Ceph RADOS object name The Ceph cluster Cluster must be up and running, with a configuration, and keyring file for User located in a librados default search path (e.g. /etc/ceph/). Pool must already exist. For informational purposes, ctdb_mutex_ceph_rados_helper will also register the cluster lock holder in Ceph Manager's service map. ctdb 7, ctdbd 1, This documentation was written by David Disseldorp 2016 David Disseldorp This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see .