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 recovery 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: recovery 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. 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 .