Difference between revisions of "CTDB and Clustered Samba"

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= CTDB and Clustered Samba =
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= Introduction =
  
 
CTDB is a clustered database component in clustered Samba that provides a high-availability load-sharing CIFS server cluster.
 
CTDB is a clustered database component in clustered Samba that provides a high-availability load-sharing CIFS server cluster.
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Samba and CTDB must be installed on all nodes of a cluster.  CTDB is part of Samba (>= 4.2.0), so to get CTDB you need to [https://www.samba.org/samba/download/ get Samba].
 
Samba and CTDB must be installed on all nodes of a cluster.  CTDB is part of Samba (>= 4.2.0), so to get CTDB you need to [https://www.samba.org/samba/download/ get Samba].
  
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== Getting CTDB Source code ==
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More details:
  
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If you [[Obtaining_Samba|download source code for Samba &gt;= 4.2.0]] then CTDB is included in the <code>ctdb</code> subdirectory.
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* [[Getting and Building CTDB]]
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* [[Upgrading a CTDB cluster]]
  
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== Binary packages ==
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= Configuring Clusters with CTDB =
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* Your operating system may include pre-built packages for Samba and CTDB
 
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* If you use pre-built packages then you need to ensure that Samba was built with cluster support
 
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:  You can get information about smbd's clustering features:
 
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  # smbd -b | grep -i 'ctdb\|cluster'
 
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    CLUSTER_SUPPORT
 
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    CTDB_SOCKET
 
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  Cluster support features:
 
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    CLUSTER_SUPPORT
 
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    CTDB_SOCKET: /var/run/ctdb/ctdbd.socket
 
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    CTDB_PROTOCOL: 1
 
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:  Note that output may vary slightly, but the <code>CLUSTER_SUPPORT</code> feature must be present.
 
  
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* CTDB will usually be in a separate package to other Samba components called <code>ctdb</code>
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* [[Basic CTDB configuration]]
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* [[Setting up a cluster filesystem]]
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* [[Configuring the CTDB recovery lock]]
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* [[Adding public IP addresses]]
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* [[Configuring clustered Samba]]
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* [[Setting up CTDB for Clustered NFS]]
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* [[Setting up CTDB with other services]]
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* [[Advanced CTDB configuration]]
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* [[Samba_CTDB_GPFS_Cluster_HowTo|CTDB with GPFS]]
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* [[GFS_CTDB_HowTo|CTDB with GFS]]
  
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== Building from source code ==
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= Analysing CTDB problems =
  
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CTDB should be built with Samba.  Add the following options to the <code>./configure</code> command.
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* [[Merged logs]]
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* [[CTDB log file search patterns]]
  
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; <code>--with-cluster-support</code> : This enables clustering support in Samba and includes CTDB in the build
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= Developing CTDB =
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; <code>--with-shared-modules=idmap_rid,idmap_tdb2,idmap_ad</code> : Clustered Samba needs an IDMAP facility so it is worth building a few
 
  
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Other than that, just [[Build_Samba_from_Source|follow instructions for building Samba]].
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* [[CTDB database design]]
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* [[Running CTDB tests]]
  
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== Legacy CTDB versions ==
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= Historical and Background Information =
  
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You should use a version of CTDB that comes with [[Samba_Release_Planning|a supported Samba version]].
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Note that some of this information is out of date.
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However, [https://download.samba.org/pub/ctdb/ legacy, standalone versions of CTDB are still available] (including [[CTDB2releaseNotes|2.x]]).  These versions were used with Samba versions older than 4.2.0.
 
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The code is also available from the CTDB git repository at git://git.samba.org/ctdb.git.  See also the [https://git.samba.org/?p=ctdb.git;a=summary GIT web interface].
 
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= Configuring Clusters with CTDB =
 
  
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* [[CTDB_Setup|Configuring a Samba Cluster with CTDB]]
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* [[CTDB Project]]
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* [[Clustered Samba]]
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* [[Samba & Clustering]]
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* [http://samba.org/~obnox/presentations/sambaXP-2009/ Michael Adam's clustered NAS articles]

Latest revision as of 05:59, 1 February 2021

Introduction

CTDB is a clustered database component in clustered Samba that provides a high-availability load-sharing CIFS server cluster.

The main functions of CTDB are:

  • Provide a clustered version of the TDB database with automatic rebuild/recovery of the databases upon node failures.
  • Monitor nodes in the cluster and services running on each node.
  • Manage a pool of public IP addresses that are used to provide services to clients. Alternatively, CTDB can be used with LVS.

Combined with a cluster filesystem CTDB provides a full high-availablity (HA) environment for services such as clustered Samba, NFS and other services.

Supported platforms

CTDB is primarily developed and tested on Linux. A subset of features may work on other platforms.

Getting and Building CTDB

Samba and CTDB must be installed on all nodes of a cluster. CTDB is part of Samba (>= 4.2.0), so to get CTDB you need to get Samba.

More details:

Configuring Clusters with CTDB

Analysing CTDB problems

Developing CTDB

Historical and Background Information

Note that some of this information is out of date.

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