• So you are trying to install *nix OS and during setup you receive an error stating: no /dev/disk/by-id This is due to the new method *nix machines are now using to address hard disks. before each disk was handled as /dev/sd(x)(n) for example /dev/sda1 or /dev/sdb2 Now disks are handled by addressing them UUID for example: […]

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  • During instance deployment you receive the following error [Error: Build of instance GUID aborted: Block Device Mapping is Invalid.] but as most openstack error this means nothing to most people. To understand the full nature of this error we need to check the logs. SSH into the openstack controller or cinder node cd into /var/log/cinder tail volume.log now we need to examine […]

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  • After an Openstack RDO deployment  you may encouter the following error: Error: Unable to retrieve volume limit information. OR Danger: There was an error submitting the form. Please try again. These errors are a result of a miss-configuration within CINDER, to resolve this all you need to do is edit the ‘/etc/cinder/cinder.conf‘ file and make sure the following two […]

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  • While running in instance in openstack you receive: NoValidHost: No valid host was found. There are not enough hosts available. If you would check the ‘/var/log/nova/nova-conductor.log‘ file you would notice the following error: NoValidHost: No valid host was found. There are not enough hosts available. but still there are no additional information. This post assumes you have enough […]

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  • During a recent deployment for Openstack Swift I had followed the installation guide for the Liberty version and after I had finished the guide I was unable to issue any swift commands. While running the basic: ‘swift stat‘ command I was greeted with “(‘Connection aborted.’, error(111, ‘Connection refused’))” after issuing: ‘swift –debug stat‘ command I […]

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  • In this quick post I will go over the steps required to configure sFlow on HP 25xx and 29xx switches (Procurve/Aruba) If you have the need to get full visibility of your network and you are wondering on how to accomplish this. I highly recommend on installing PRTG and using the sFlow sensor to geather data from […]

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  • Hey all, Recently I’ve came across an issue with a weird error while trying to install the NOVA project as a part of an OpenStack install. While following the procedure on the openstack website the nova database update failed with the following basic error: “Command failed, please check log for more info” while looking at […]

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  • How to install KVM qemu virtualization on CentOS: First what is KVM, KVM are the acronyms for: Kernel-Bases Virtual Machine and it is the hottest trend in the virtualization world the development had progressed enough so it is now stable for us in production environments and many enterprises are shifting towards KVM from the generic […]

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  • So you have installed your KVM virtualization and you are about to run your very first VM instance with Virt-Manager but your X11 forward opens up with weird characters as shown below. The solution is actually quite simple simply install the following package via apt-get / yum: dejavu-lgc-sans-fonts   yum (RedHat/CentOS/Fedora): yum install dejavu-lgc-sans-fonts apt (Ubuntu): apt-get […]

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  • Amazon AWS

    April 22, 2015 -

    Amazon AWS Basics

    Introduction to Amazon AWS: The Amazon AWS Basics Everyone are talking about cloud, many companies are looking for DevOPS or SysOPS personal and those are hard to find. In this post I’ll talk about the basics of AWS terminology in the hopes of easing the transition into the AWS world a little more comfortable. AWS […]

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