Red Hat GFS 5.2.1 -, Administrator'S Manual

Page: 174 / 192

160 Appendix B. Basic GFS Examples
B.5.2.3. 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.
B.5.3. Setup Process
The setup process for this example consists of the following steps:
1. Create and export GNBD devices.
Create and export a GNBD device for the storage on the GNBD server (
gnbdsrv
) to be used
for the GFS file systems and CCA device. In the following example,
gfs01
is the GNBD device
used for the pool of the first GFS file system,
gfs02
is the device used for the pool of the second
GFS file system, and
cca
is the device used for the CCA device.
gnbdsrv#
gnbd_export -e cca -d /dev/sda1
gnbdsrv#
gnbd_export -e gfs01 -d /dev/sda2
gnbdsrv#
gnbd_export -e gfs02 -d /dev/sdb1