Version information
released Oct 6th 2020
This version is compatible with:
- Puppet Enterprise 2019.8.x, 2019.7.x, 2019.5.x, 2019.4.x, 2019.3.x, 2019.2.x, 2019.1.x, 2019.0.x, 2018.1.x, 2017.3.x, 2017.2.x, 2016.4.x
- Puppet >= 4.10.0 < 7.0.0
- ,
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Add this module to your Puppetfile:
mod 'bahner-ctdb', '1.0.0'Learn more about managing modules with a PuppetfileDocumentation
bahner/ctdb — version 1.0.0 Oct 6th 2020
ctdb
Table of Contents
- Description
- Setup - The basics of getting started with ctdb
- Usage - Configuration options and additional functionality
- Development - Guide for contributing to the module
Description
Configuring ctdb can be a little daunting at first. When I got it to work I created this module and forgot about it. I see that many have downloaded and figured it could use a brush up.
Setup
It mainly just installs the package and configure the bare necessities. ctdb is a cluster tdb, which is the backend for a local Samba installation without AD integration. So it stores user accounts and what have you. When running you can add users to just one of the servers and have all the Samba servers in the cluster pick up on the change.
Setup Requirements
A shared file system is required. You must have such a filesystem, whether SMB of NFS where the cluster lock can be stored. This is so important the no default is given for the recovery_lock file, which must reside on this shared filesystem, that all cluster members must have access to.
Usage
You need at least to configure where the lock file is stored.
You must provide a list of ip adresses, the nodes_list which the cluster members can use to see each other.
You must provide the public addresses the cluster you create. If one server goes down the others will start answering on these adresses. It's DNS Round Robin all the way. Secundum non datur. ctdb wotks by keeping all of these IPs up and running across the cluster. You then you DNS round robin to spread load between them or something like that.
So either you populate the nodes_list and public_addresses files yourself, or you provide the correct ip/interface pairs and ip list to the module. Using the module is probably the best. Look at the REFERENCE.md for examples.
The following Hiera example demonstrates usage.
---
ctdb::recovery_lock: /Shared/files/system/ctdb.lock
ctdb::nodes:list:
- 10.0.0.2
- 10.0.0.4
- 10.0.0.6
- 10.0.0.8
- 10.0.0.10
ctdb::public_addresses_list:
- '10.0.0.1 eth0'
- '10.0.0.3 eth0'
- '10.0.0.5 eth0'
- '10.0.0.7 eth0'
- '10.0.0.9 eth0'
- '1.2.3.4 eth1'
- '1.2.3.5 eth1'
ctdb::manages_samba: true
ctdb::manages_winbind: true
ctdb::manages_nfs: true
ctdb::max_open_files: 10
ctdb::logging: file:/var/log/log.ctdb
ctdb::debuglevel: ERR
ctdb::set_tdb_mutex_enabled: 1
ctdb::samba_skip_share_check: true
Development
Pull requests are welcome, so are issues.
Release Notes
See CHANGELOG.md
2020-10-07: bahner
Reference
Table of Contents
Classes
ctdb: Configure a cdtb cluster
Classes
ctdb
Using this class the necessities for getting a ctdb cluster up and running should be within grasp. It mostly makes sure the base necessities are met, but some everyday settings are included.
Batteries are not.
Whether or not to check the gluster share. Shares are not system paths, so when using gluster shares this must be set.
Examples
Minimum invocation
class { 'ctdb':
recovery_lock => '/data/glusterfs/ctdb/lock',
}
A mostly full invocation
class { 'ctdb':
recovery_lock => '/gluster/lock/lockfile',
public_addresses => '/usr/local/etc/ctdb.public.adresses',
public_addresses_list => [
'10.0.0.1 eth0',
'10.0.0.3 eth0',
'10.0.0.5 eth0',
'10.0.0.7 eth0',
'10.0.0.9 eth0',
'1.2.3.4 eth1',
'1.2.3.5 eth1',
],
nodes => '/usr/local/etc/ctdb.nodes',
nodes_list => [
'10.0.0.2',
'10.0.0.4,
'10.0.0.6,
'10.0.0.8,
'10.0.0.10,
],
max_open_files => 1000000,
set_tdb_mutex_enabled => 1,
}
Parameters
The following parameters are available in the ctdb class.
recovery_lock
Data type: Stdlib::Absolutepath
Some file path on a shared storage. This is requred. Default for this module is /gluster/locki/lockfile - but this is arbitrary. This needs to rest on a filesystem shared by all cluster nodes.
public_addresses
Data type: Optional[Stdlib::Absolutepath]
File with a list of public addresses this host is willing to hold. One per line in the form of: IPADDR/PREFIX IFNAME eg. 1.2.3.4/24 eth0 1.8.8.8/30 eth0
public_addresses_list
Data type: Optional[Array]
The actual list (contents of public_addresses). An array with one entry for each line in file. If this array is not filled you must populate the file yourself. Example: ["1.2.3.4/24 eth0", "1.8.8.8/30 eth2"]
nodes
Data type: Optional[Stdlib::Absolutepath]
File with simple list on initial cluster members. One per line. Default: /etc/ctdb/nodes
nodes_list
Data type: Optional[Array]
Array with list on initial cluster members. Example: ["192.168.0.1", "192.168.0.2"] These address must not overlap with the public addresses in the sense that no one address can be the same, BUT they can all be in the same subnet.
If this array is not given, you must populate the file by yourself.
manages_samba
Data type: Optional[Boolean]
Whether or not to manage samba service. Default is no.
manages_winbind
Data type: Optional[Boolean]
Whether or not to manage winbind service. Default is no.
manages_nfs
Data type: Optional[Boolean]
Whether or not to manage NFS service. Default is no.
max_open_files
Data type: Optional[Integer]
Maximum number files to hold open.
logging
Data type: Optional[String]
Pseudo URL for where to log. Default is file:/var/log/log.ctdb file:/var/log/log.ctdb syslog:nonblocking syslog:udp-rfc5424 syslog:udp
debuglevel
Data type: Optional[Enum['ERR','WARNING','NOTICE']]
Loglevel. Possible values are:
-
ERR
-
WARNING
-
NOTICE
Default: NOTICE
set_tdb_mutex_enabled
Data type: Optional[Integer]
Enables TDB mutexes which are more efficient than posix locks, if available. Use 0 or 1 as truthy value.
samba_skip_share_check
Data type: Optional[Boolean]
Dependencies
- puppetlabs-stdlib (>= 1.0.0 <7.0.0)
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conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License. You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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 <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.