Openstack resize instance no valid host was found
Today I had to resize an instance in my OpenStack and noticed that I couldn’t do that because of an error: “No valid host was found. No valid host found for resize (HTTP 400)“. Soon enough...
Tagged: Linux
Linux 4.2 will enable you to update your firmware
After the jump from 3.19 to 4.0 this year, after the not-so-exciting 4.1 version that introduced EXT4 encryption thanks to Google, the penguin is approaching version 4.2. With that said, this release might be closer than...
LVM: an introductory guide to logical volumes
Logical Volume Management is easily one of the most important and useful tools in storage administration. With LVM you can easily move “partitions” (volumes) around your physical disk, have snapshots, even mirroring or live migrations across...
How to create software RAID in RHEL 7
When it comes to combining solid performance with reliability and recoverability, RAID is sure to show up. RAID is a widely used technology in mission-critical and enterprise environments. Today we’ll talk about software RAID in Linux.
RHEL 6.7 released
Red Hat Enterprise Linux is one of the most popular enterprise-class Linux distributions. With its stability, extended support and reliability it is the fundamental of many mission-critical systems. RHEL 7 was released about one year ago,...
How to install Mageia 5 in 10 easy steps!
Whether you are an old user or a new one willing to try out this Linux Distribution, this guide is for you! Discover how easily you can install Mageia 5 on your computer now! If you’re...
Mageia 5 released, take a look at the new Mandriva
After many years during this May Mandriva, the society behind the homonym Linux Distribution, declared that it was going to cease all the activities. Many tears were shed at its death, however long before the event,...
OpenStack can’t attach cinder volume
Yesterday I was setting up a few things at my home OpenStack server and ran into an ugly problem that took me a while to resolve. I couldn’t attach any volume from the backends I had...
SSH, what is it and how to use it
Few tools are as useful as SSH (Secure SHell). If administering computer is a tower, then SSH is one of the first bricks placed. SSH enables system administrators to remotely control a machine by accessing its...
What is OpenStack?
So, if you haven’t been sleeping under a huge rock in the last few years, you’ve probably heard of Virtualization and Cloud Computing. And chances are you’ve heard of OpenStack. A free and open source framework...
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