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Red Hat customers can now use rPath

Tuesday, January 5th, 2010

Red Hat customers can now use the rPath release automation platform to manage their systems running Red Hat Enterprise Linux RHEL 4 and RHEL 5.

Posted in rBuilder, rPath, red hat, rhel | No Comments »

Red Hat dump Xen for KVM

Tuesday, November 10th, 2009

The latest announcement from Red Hat about Red Hat Enterprise Virtualization for Servers says Red Hat Enterprise Virtualization features a unique and revolutionary virtualisation technology called KVM and that they have virtualised a workload of 12.5 VM’s per core (ie 400 VM’s) using a 32 core 1TB server ! And unlike Oracle Xen VM Server, Red Hat Enterprise Virtualization, includes SELinux secuirty technology !

Posted in kvm, red hat | No Comments »

Red Hat RHEL 5 KVM & Xen unconfusion !

Friday, September 25th, 2009

Red Hat Enterprise Linux 5.4

now includes full support for the Kernel-based Virtual Machine (KVM) hypervisor on x86_64 based architectures. KVM is integrated into the Linux kernel, providing a virtualization platform that takes advantage of the stability, features, and hardware support inherent in Red Hat Enterprise Linux.

Note
Xen is the default hypervisor that is shipped with Red Hat Enterprise Linux. As such all configuration defaults are tailored for use with the Xen hypervisor. For details on configuring a system for KVM, please refer to the Virtualization Guide.

Important
Xen based virtualization is fully supported. However, Xen-based virtualization requires a different version of the kernel to function. The KVM hypervisor can only be used with the regular (non-Xen) kernel.

Warning
While Xen and KVM may be installed on the same system, the default networking configuration for these are different. Users are strongly recommended to only install one hypervisor on a system.

Posted in kvm, red hat, rhel, xen | No Comments »

Red Hat and M$ sign VM agreement

Tuesday, February 17th, 2009

Red Hat and Microsoft have signed reciprocal agreements to enable increased interoperability for the companies’ virtualization platforms. Each company will join the other’s virtualization validation/certification program and will provide technical support for their mutual server virtualization customers.

Posted in red hat, xen | No Comments »

Red Hat defends replacing Xen with KVM

Thursday, June 26th, 2008

Red Hat defends replacing Xen with KVM

Posted in kvm, red hat, rhel, xen | 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 »