When running KVM in a nested virtualization you may run into the following error when attempting to launch machines. Example errorsqemu-system-x86_64: error: failed to set MSR 0x38d to 0x0qemu-kvm: error: failed to set MSR 0x48e ... What does this mean?This error is caused by MSRs not being available to the hypervisor, in this case a virtualized hypervisor. The FixTo resolve this...

In this post, I intend to bring new folks into TripleO-Ansible by explaining how TripleO is evolving. We're building a modular set of Ansible roles, playbooks, plugins, and scripts, which are reforming the foundation of enterprise-ready OpenStack environments. While that's awesome in its own right, these tools are also built to provide easy to consume utilities which can make day to day...

Virtual Instance Fails to boot after an upgrade If you have upgraded your installed Linux Virtual Machine, and it no longer boots you may have FooBar'd your boot parameters for your installation. In most cases this can fixed, and in the following lines I will show you how. In this article I am using XenServer 5.6+ as my Hypervisor and Ubuntu...

Basic but Essential Network Monitoring Basic Administration principles state that you, the administrator, should have a strong grasp on what your server is doing at all times. One Major metric that is sometimes missed is overall network activity. The metrics gained by proper network monitoring can reveal your traffic trends which will lead to a better understanding in the trends for your...

As the title states dd is the Mighty Disk Destroyer, though it can also be your savior. Many Admins fear and even cower when the letters DD are mentioned together; fear not, DD can be your best friend. Being that you are a Linux Professional and or want to be a professional, you are sometimes faced with the need to clone, backup...