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HOWTO enable RPMForge repository in CentOS
Since I’m working with CloudStack I’m also working with CentOS. As I’ve been working with Debian for over 10 years, it sometimes takes some extra time to get things done. Like when you want to install...
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Building a redundant pair of Linux storage servers using DRBD and Heartbeat
I’ve been building redundant storage solutions for years. At first, I used it for our webcluster storage. Nowadays it’s the base of our CloudStack Cloud-storage. If you ask me, the best way to create a...
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Automating persistent iptables rules on Red Hat, SUSE and Debian
When you create firewall rules with iptables on Linux, you want to make them persistent over reboot, because they are not by default. Different Linux distributions have different methods of achieving...
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Connecting two Open vSwitches to create a L2 connection between sites
Recently I played with Open vSwitch and it’s awesome! Open vSwitch is a multilayer virtual switch and it brings a lot of flexibility in the way you can create interfaces and bridges in Linux. It’s also...
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Adding a KVM cluster with NSX networking to CloudStack
As KVM seems more and more interesting, at work we wanted to do a Proof-of-Concept. The KVM hypervisor cluster had to be controlled by CloudStack and also integrate with NSX (formerly known as Nicira)....
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