Red Hat’s virtualization strategy has redundancy – Quo vadis?

A couple of days there have been some reports that Red Hat will release a commercialized version of deltacloud, an abstraction layer for different kinds of virtualization technologies and clouds such as VMware, RHEV, Amazon EC2 etc. Red Hat puts a lot of resources on virtualization, they maintain and/or sponsor multiple projects in parallel. The most important from my point of view is libvirt which is as well an abstraction layer for different virtulization technologies such as VMware, KVM, Xen ….Read More

A brief test of OTRS::ITSM Changemanagement and the insanity of ITIL compliant software

OTRS is known as best-of-breed in open source incident management systems. Since quite some time, OTRS made its product ITIL V3 compliant. Means: It also comes with a change management module. At work we use a complex and extremely user-unfriedly software. This brought me to the idea to test the OTRS change management module in order to propose OTRS as a replacement for the currently used software for the Change- Incident- and Problem Management. Incident- and Change Management integration I ….Read More

IUS Community RPMs for Red Hats RHEL

I was criticizing that software in RHEL is too outdated for web servers quite soon after release, see my blog post http://blog.delouw.ch/2010/05/02/rhel6-as-a-web-server/. While this is true for a system fully supported by Red Hat, I learned an alternative from a comment on the post. This alternative is the so called IUS community repository. About the IUS Community Project The project was launched in September 2009. In spite of being a young project, it has a history. At Rackspace, a large ….Read More

KVM supports live migration between CPUs with different features

The video is a bit old, it is from November 2008. But it is still quite interesting to see and discuss about it. With KVM you can upgrade your farm of servers easy, it does not matter if the new servers have CPUs with new features or not. I’m not sure if you can do this with ESX, I guess not, you probably need to migrate them shut down. httpvh://www.youtube.com/watch?v=EuhU6jJjpAQ Have fun!

An example why open source software is cool

Recently I have set up an Apache Tomcat. As a replacement for the Tomcat manager I deployed Psi-Probe for easy deployment and access to statistics. Afterwards I installed the production software which needs to add a JVM parameter user.country=CH to have the proper date and time format used in Switzerland. This had a unwanted side-effect to Psi-Probe. The Interface switched to German, no way to switch the language back to English. Since my mother tongue is German, no big deal ….Read More

RHN Inter-Satellite-Sync is kind of tricky and picky

If you try to establish an ISS (Inter Satellite Sync) between two RHN Satellites, do not fully trust the documentation. A slave Satellite must be named by a hostname (IP is not enough) and must have an A and a PTR DNS record or have an /etc/hosts entry. Check it before restarting the satellite by issuing rhn-satellite restart. The check is simply done by entering gethostip rhn.example.com and getent hosts <IP-address> on the commandline. When Quoting the documentaion at Red ….Read More

Apache HTTP server and its further development

The Apache httpd is one of the most stable software pieces which is still in use. The latest huge step forward was with the release of 2.0. Quo vadis Apache httpd? The most current release is 2.2.15. During the 2.2.x release cycle, there have basically been only bug-fix releases (Okay, response header rewrite starting on 2.2.9  is a nice feature). This brings me to the question: What is going on with 2.4? The answer is quite simple: As you can ….Read More

Spacewalk 1.0 released

Spacewalk 1.0 has been released Spacewalk is the upstream project for Red Hat’s RHN Satellite software, one of the best systems management software available for Linux Systems. In the past few weeks one could see a lot of git commits on the source repository of spacewalk. There is no changelog available yet. The road map mentioned compatibility with Apache Tomcat 6.0.x to be able to install spacewalk on Fedora12 and RHEL6. There should have also been several enhancements in the ….Read More