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), http://ctdb.samba.org/
This documentation was written by David Disseldorp
Copyright © 2016 David Disseldorp
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