Red Hat GFS 5.2.1 -, Administrator'S Manual

Page: 53 / 192

Chapter 6.
Creating the Cluster Configuration System Files
The GFS Cluster Configuration System (CCS) requires the following files:
• license.ccs
— The license file accompanies the GFS software and is required to use GFS.
• cluster.ccs
— The cluster file contains the name of the cluster and the names of the nodes where
LOCK_GULM servers are run.
• fence.ccs
— The fence file describes each device used for fencing.
•
nodes.ccs
— The nodes file contains an entry for each GFS node and LOCK_GULM server node.
This file specifies the IP address and fencing parameters of each node.
This chapter describes how to create the CCS files and contains the following sections:
•
Section 6.1 Prerequisite Tasks
•
Section 6.2 CCS File Creation Tasks
•
Section 6.3 Dual Power and Multipath FC Fencing Considerations
•
Section 6.4 GNBD Multipath Considerations
•
Section 6.5 Adding the
license.ccs
File
•
Section 6.6 Creating the
cluster.ccs
File
•
Section 6.7 Creating the
fence.ccs
File
•
Section 6.8 Creating the
nodes.ccs
File
6.1. Prerequisite Tasks
Before creating the CCS files, make sure that you perform the following prerequisite tasks:
•
Choose a cluster name (user variable,
ClusterName
).
•
Create a temporary directory (for example,
/root/alpha/
) in which to place the new CCS files
that are created. Note the temporary directory path; it is used later as a
Directory
parameter
when the CCS files are written to a CCA (Cluster Configuration Archive) device. For more infor-
mation, refer to Section 7.1 Creating a CCS Archive .
•
Identify each node that runs the LOCK_GULM server daemons. Those nodes must have entries in
the
nodes.ccs
file. Refer to Section 8.2 LOCK_GULM .
•
Determine if any GFS node has dual power supplies or multiple paths to FC storage.
•
Determine if you are using GNBD multipath.
•
Determine the type of fencing for each node.
For more information about prerequisite tasks, refer to Section 1.5 Before Configuring GFS