CTDB and Clustered Samba

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:

• Getting and Building CTDB
• Upgrading a CTDB cluster

Configuring Clusters with CTDB

• Basic CTDB configuration
• Setting up a cluster filesystem
• Configuring the CTDB recovery lock
• Adding public IP addresses
• Configuring clustered Samba
• Setting up CTDB for Clustered NFS
• Setting up CTDB with other services
• Advanced CTDB configuration
• CTDB with GPFS
• CTDB with GFS

Analysing CTDB problems

• Merged logs
• Log file search patterns

Developing CTDB

• CTDB database design
• Running CTDB tests

Historical and Background Information

Note that some of this information is out of date.

• CTDB Project
• Clustered Samba
• Samba & Clustering
• Michael Adam's clustered NAS articles