1CTDB-ETCD(7) CTDB - clustered TDB database CTDB-ETCD(7)
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6 ctdb-etcd - CTDB etcd integration
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9 ctdb_etcd_lock
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12 ctdb_etcd_lock is intended to be run as a mutex helper for CTDB. It
13 will try to connect to an existing etcd cluster and grab a lock in that
14 cluster to function as CTDB's cluster lock. Please see
15 ctdb/doc/cluster_mutex_helper.txt for details on the mutex helper API.
16 To use this, include the following line in the [cluster] section of
17 ctdb.conf(5):
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19 cluster lock = !/usr/local/usr/libexec/ctdb/ctdb_etcd_lock
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22 You can also pass "-v", "-vv", or "-vvv" to include verbose output in
23 the CTDB log. Additional "v"s indicate increases in verbosity.
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25 This mutex helper expects the system Python interpreter to have access
26 to the etcd Python module. It also expects an etcd cluster to be
27 configured and running. To integrate with this, there is an optional
28 config file of the following format:
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30 key = value
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33 The following configuration parameters (and their defaults) are defined
34 for use by ctdb_etcd_lock:
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36 port = 2379 # connecting port for the etcd cluster
37 lock_ttl = 9 # seconds for TTL
38 refresh = 2 # seconds between attempts to maintain lock
39 locks_dir = _ctdb # where to store CTDB locks in etcd
40 # The final etcd directory for any given lock looks like:
41 # /_locks/{locks_dir}/{netbios name}/
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44 In addition, any keyword parameter that can be used to configure an
45 etcd client may be specified and modified here. For more documentation
46 on these parameters, see here: https://github.com/jplana/python-etcd/
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49 ctdb(7), ctdbd(1), http://ctdb.samba.org/
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52 This documentation was written by Jose A. Rivera
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55 Copyright © 2016 Jose A. Rivera
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57 This program is free software; you can redistribute it and/or modify it
58 under the terms of the GNU General Public License as published by the
59 Free Software Foundation; either version 3 of the License, or (at your
60 option) any later version.
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62 This program is distributed in the hope that it will be useful, but
63 WITHOUT ANY WARRANTY; without even the implied warranty of
64 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
65 General Public License for more details.
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67 You should have received a copy of the GNU General Public License along
68 with this program; if not, see http://www.gnu.org/licenses.
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73ctdb 06/13/2022 CTDB-ETCD(7)