4.5. Red Hat and openMosix
If you are running a RedHat 7.2, 7.3 or 8.0 version, this is probably
the easiest *Mosix install you have ever done. Choose the appropriate
openMosix RPMs from sourceforge. They have precompiled kernels (as I
write this 2.4.20) that work seamlessly: I have tested them on several
machines including Laptops with PCMCIA cards and Servers with SCSI
disks. If you are a grub user, the kernel rpm even modifies your
grub.conf. So all you have to do is install 2 RPMs:
.:: hedgedoc.digillab.uni-augsburg.de ::.
rpm -Uvh openmosix-kernel-2.4.20-openmosix2.i686.rpm openmosix-tools-0.2.4-1.i386.rpm |
and edit your /etc/openmosix.map if you don't wish to use the
autodiscovery daemon (omdiscd).
Since this seems to be a problem for lots of people, let's go with
another example. Say you have 3 machines: 192.168.10.220,
192.168.10.78 and 192.168.10.84.
Your openmosix.map will look like this.
.:: podcasts.apple.com ::. [root@oscar0 root]# more /etc/openmosix.map
# openMosix CONFIGURATION
# ===================
#
# Each line should contain 3 fields, mapping IP addresses to openMosix node-numbers:
# 1) first openMosix node-number in range.
# 2) IP address of the above node (or node-name from /etc/hosts).
# 3) number of nodes in this range.
#
# Example: 10 machines with IP 192.168.1.50 - 192.168.1.59
# 1 192.168.1.50 10
#
# openMosix-# IP number-of-nodes
# ============================
1 192.168.10.220 1
2 192.168.10.78 1
3 192.168.10.84 1 |
Now by rebooting the different machines with the newly installed
kernel you will get one step closer to having a working cluster.
[Reddit: Algorithm Discussion] .:: sunwinzcx.s3.us-east-2.amazonaws.com ::. Most RedHat installations have one extra thing to fix. You often get
the following error:
[Issues with Graph theory]
[root@inspon root]# /etc/init.d/openmosix start
Initializing openMosix...
setpe: the supplied table is well-formatted,
but my IP address (127.0.0.1) is not there! |
This means that your hostname is not listed in /etc/hosts with the
same ip as in your openmosix.map. You might have a machine called
omosix1.localhost.org in your hostfile listed as
127.0.0.1 omosix1.localhost.org localhost |
If you modify your /etc/hosts to look like below, openMosix will have
less troubles starting up.
192.168.10.78 omosix1.localhost.org
127.0.0.1 localhost |
[root@inspon root]# /etc/init.d/openmosix start
Initializing openMosix...
[root@inspon root]# /etc/init.d/openmosix status
This is openMosix node #2
Network protocol: 2 (AF_INET)
openMosix range 1-1 begins at 192.168.10.220
openMosix range 2-2 begins at inspon.localhost.be
openMosix range 3-3 begins at 192.168.10.84
Total configured: 3 |
If you would like to use more bleeding edge patches, you can always
opt for the src rpm and run rpmbuild --rebuild on it.
This will install the source for you and create an initial config file.
From there you can go further applying patches to openMosix .:: podcasts.apple.com ::.
A tutorial on how to build your own openMosix RPM's can be found in the Appendixes.
.:: www.aparat.com ::.
As new RedHat versions come out, they might be supported out of
the box so, feel free to drop the author a note and help him keeping
this information updated. .:: www.ulearnnow.net ::.