Red Hat GFS 5.2.1 -, Administrator'S Manual

Page: 167 / 192

Appendix B. Basic GFS Examples 153
B.4.2.1. Kernel Installed
An appropriate kernel must be installed and running on each node. Refer to Section 3.2.1 Installing a
Linux Kernel for more information about installing a Linux kernel.
B.4.2.2. GFS RPM Installed
The GFS RPMs must be installed, and all GFS commands, daemons and fencing agents must be
accessible via root’s search path.
B.4.2.3. Kernel Modules Loaded
Each node must have the following kernel modules loaded:
• ccs.o
• gfs.o
•
lock_harness.o
• lock_gulm.o
• pool.o
Note
The GFS kernel modules must be loaded every time a node is rebooted. If they are not loaded, GFS
will not function.
You can confirm that the modules have been loaded by running the
lsmod
command. If you need to
load the kernel modules, it is recommended that you use the
modprobe
command, using the following
syntax:
modprobe ModuleName
The following example shows the
modprobe
command being used for loading the
ccs.o
module:
#
modprobe ccs
Note
When using
modprobe
, do not specify the
.o
suffix as part of the module name. If the response to
the
modprobe
command displays a message about being unable to find a module, run the
depmod
-a
command and try loading the module again.