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] [Timeout] [-n Namespace]
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
Timeout: Ceph RADOS lock duration in seconds (optional)
Namespace: Ceph RADOS pool namespace (optional)
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.