By: variia

March 8, 2010 12:46 pm

4,029 views

REMUS: XEN high availability easy!

Have you heard about the REMUS project? It's a fantastic piece of code maintaining an exact copy of your XEN virtual machines on a backup host. Better yet: it's now incorporated into the XEN hypervisor and expected in the next major release! "The Remus project has just been incorporated into the Xen hypervisor. Developed […]

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By: variia

March 16, 2009 1:44 am

1,654 views

Enterprise Class Virtual Machine Management for FREE!

ConVirt provides enterprise-class management of open source virtualization platforms, making open source virtualization an extremely viable and cost-effective choice for enterprises. ConVirt lets you manage the complete lifecycle of Xen and KVM virtualization platforms from a central, GUI dashboard. With sophisticated template-based provisioning, centralized monitoring, configuration management and administration, IT administrators can now automate the […]

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By: variia

February 24, 2009 9:49 am

9,262 views

Clustering XEN with Heartbeat and Advanced HASI

Contents: About this guide Configuration Operating Hints Testing the cluster Proof of concept Conclusion About this guide This document is focusing on a design where XEN virtual machines (domU) are centrally managed according to a set policy and highly available. What is written here is the real thing not a demo and has been working […]

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By: variia

February 5, 2009 12:45 pm

9,440 views

Create, Convert Disks to Persistent Device Names

Problem description In traditional Linux, disk devices are recognized by the kernel at the boot process and accessed via a “virtual” block device file residing in the /dev directory. These were created as static devices during installation. For example: /dev/sda - first SCSI hard drive or CDROM /dev/hda - first IDE hard drive or […]

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By: variia

January 28, 2009 11:16 am

7,157 views

HP Proliant Support Pack on SLES 10

Overview ProLiant Support Packs (PSP) represent operating system (OS) specific bundles of ProLiant optimized drivers, utilities, and management agents for HP ProLiant hardware and available for SUSE Linux Enterprise Server 10. It includes utilities to query, modify, etc. your BIOS, perhaps your SmartArray configuration or your HP SAN LUNs. Besides these, it includes SNMP agents […]

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By: variia

January 23, 2009 4:35 pm

117,905 views

Remote Desktop on Linux, Managing GUI Displays Remotely

In this guide I'll explain how to manage X displays (GUI) on Linux servers, desktops in best possible way and remotely. I'm still a CLI guy, barely use the GUI but nowadays more and more GUI tools added to many Linux flavors so it's unavoidable to use them every now and then. This guide is […]

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By: variia

January 22, 2009 10:21 am

5,646 views

Unlimited Bash History

The shell history is a very useful tool for system administrators perhaps for any other user as well. I found on some custom systems that I need unlimited history to actually track what was happening on the machine for its lifetime particularly for the root account. The default settings in bash to remember are 500 […]

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By: variia

November 19, 2008 10:33 am

9,653 views

Fixing vpnc disconnect problem above version 0.5.x

"vpnc" on Linux is the best and most popular VPN client for Cisco gateways. Some distributions recently upgraded their stock version to 0.5.x and above which brought up some mysterious connection issues with some Cisco equipment. It affected: OpenSUSE 11 and above SLED10SP2 Ubuntu 8.04 and above for sure and probably […]

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By: variia

August 26, 2008 7:02 pm

2,930 views

Finding missing libraries for building software from source

This quick tip explains how to find "missing" libraries for building software from source. Let's say you want to build and application which requires "Xm" headers to be installed. How do you actually know which package to install? Each SuSE media includes a file in the root directory named ARCHIVES.gz with all […]

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By: variia

August 25, 2008 3:57 pm

4,987 views

Cloning XEN virtual machines

Not many people know that Novell actually now maintains a script to make XEN virtual machine cloning easy. It's located in /etc/xen/scripts/xmclone.sh and part of the xen-tools package. geeko:~ # rpm -qf /etc/xen/scripts/xmclone.sh xen-tools-3.2.0_16718_16-0.3 Try it out, I'm sure you will never waste your time with installing XEN virtual machines […]

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