centos « vizz.info

CentOS 5 now delivered by rPath

Friday, November 14th, 2008

rPath let you chose rPath, Ubuntu or CentOS 5 as your base distro !

just goto http://www.rpath.org/rbuilder/project/<your-distro>/editVersion and choose

“CentOS 5 delivered by rPath” in the Appliance Platform dropdown !

Tags: centos, platform, rPath
Posted in centos, rPath | No Comments »

VMWare Server, hyper threading CPUs and the SMP kernel

Wednesday, June 18th, 2008

Just noticed an interesting quirk with VMWare Server and hyper threading CPUs

I told my VM to use 1 CPU but CentOS 4 install detected the underlying hardware CPU had hyper threading so installed the SMP kernel !

Linux localhost.localdomain 2.6.9-67.0.15.ELsmp #1 SMP Thu May 8 10:52:19 EDT 2008 i686 i686 i386 GNU/Linux

as opposed to creating a VM where underlying hardware didn’t have hyper threading where CentOS 4 install just installed the basic kernel !

Linux localhost.localdomain 2.6.9-67.0.15.EL #1 Thu May 8 10:39:19 EDT 2008 i686 i686 i386 GNU/Linux

Tags: centos, hyper-threading, kernel, smp, vmwsvr
Posted in centos, vm, vmware | No Comments »

Red Hat RHEL, CentOS, OEL 4 & 5 SAN filesystems go readonly !

Wednesday, June 11th, 2008

Apparently there is a problem in the kernel used in Red Hat RHEL 4&5, CentOS 4&5, OEL 4&5, SUSE, Ubuntu 7 and other GNU/Linux distributions that causes EXT2 EXT3 filesystems that are residing on SANs to randomly go read-only !

However if you are using kernel 2.6.18-53.1.21+ or 2.6.22+ you should be ok !

See Red Hat

See VMware

Posted in centos, oracle enterprise, red hat, rhel, suse, ubuntu, vm, vmware | No Comments »

Howto use yum excludes to prevent kernel updates breaking VMware kernel modules

Friday, February 15th, 2008

If you are using CentOS 5 , Oracle Enterprise 5 or Red Hat Enterprise 5 as a VMware host or guest you can edit /etc/yum.conf and add a line

exclude=kernel*

this should prevent yum updating your kernel and thus breaking vmware services modules in vmware server and vmware services modules in vmware guest tools

also see

http://www.linuxmanpages.com/man5/yum.conf.5.php

http://linux.die.net/man/5/yum.conf

Posted in centos, oracle enterprise, red hat, vm guest, vm host, vmware | No Comments »

OpenVZ (CentOS based) live-CD VM server & VM guests

Sunday, January 6th, 2008

There is an OpenVZ live-CD VZ VM server with VZ VM guests (based on CentOS or KNOPPIX) that you can download from http://wiki.openvz.org/Download_live_CD

And there is a quick start guide to read at http://wiki.openvz.org/Getting_started_with_OpenVZ_live_CD

Tags: centos, guest, host, knoppix, openvz, vm
Posted in centos, download, live-cd, openvz, vm guest, vm host | No Comments »