Creating The Cluster Configuration System Files; Prerequisite Tasks; Ccs File Creation Tasks - Red Hat GFS 6.0 Administrator's Manual

Creating the Cluster Configuration System Files
The GFS Cluster Configuration System (CCS) requires the following files:
— The cluster file contains the name of the cluster and the names of the nodes where
• cluster.ccs
LOCK_GULM servers are run.
— The fence file describes each device used for fencing.
•
fence.ccs
— The nodes file contains an entry for each GFS node and LOCK_GULM server node.
• nodes.ccs
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 for CCS Files
•
Section 6.5 Creating the
•
Section 6.6 Creating the
•
Section 6.7 Creating the
•
Note
If you are using GFS with Red Hat Cluster, you can create CCS files with GFS Druid.
For information about configuring and using GFS with Red Hat Cluster Suite, refer to
Appendix A Using Red Hat GFS with Red Hat Cluster Suite.

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,
•
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
•
file. Refer to Section 8.2 LOCK_GULM.
the
nodes.ccs
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
File
cluster.ccs
File
fence.ccs
File
nodes.ccs
/root/alpha/
Chapter 6.
) in which to place the new CCS files