architecting your data center (version 2) - part 3 - spacewalk

it was a tough call to make: spacewalk or gitlab; eventually the thought of downloading loads of packages everytime i updated a vm won me over. there is another advantage to having your own spacewalk instance on site that i will talk about in a later article.

you may be wondering why i wanted to install gitlab. well, i want to document my notes in a wiki at the same time i wanted to have a common source code repository, not only for scripts but also for files like /etc/hosts. as i add more VMs i will be adding them to the hosts file.

architecting your data center (version 2) - part 2 - the vm template

welcome back, in this series of articles i am documenting my steps as i build out an infrastructure to support an openstack cloud.

previously, i set up a kvm server. in this article i will briefly describe the steps i took to configure a vm to be a template to clone from

howto: create your own speedtest site

surprise! you too can have your own speedtest site and you dont need much. its already out there. you can use it internally or externally. you can even connect it up to a database to remember past results. but the most important fact to me is that it is open source.

and it is available from here 

first of all, you need to install some dependencies

yum -y install httpd php perl perl-CGI perl-Time-HiRes


bareos/bacula and selinux

so i was experimenting with bareos aka the fork of bacula and i got this error message on the bareos-webui when i attempted to log in

Error: Permission denied, director seems to be down or blocking our request.

after a bit of experimenting, it turns out that the error was caused by selinux blocking access. this page is what gave me the insight and the command is

setsebool -P httpd_can_network_connect on

architecting your data center (version 2) - part 1 - the kvm server

this is the 2nd part of series i am writing about architecting your data center (version 2)

so after a bit of experimentation, i have come to the conclusion that the first step is NOT to setup the rdo-manager's undercloud but in fact to
set up a KVM host. the logic being with a kvm host i can set up a VM for the rdo-manager's undercloud, take snapshots and restore to a previous snapshot if a mistake or 2 is made.

script to identify a cpu's virtualisation capabilities

a while ago i wrote a post called how to setup a nested esx lab at home i wrote a script for that to help me identify if my cpu supported virtualisation and if it did whether it also supported _nested_ virtualisation i then put it up on github over here

architecting your data center (version 2)

sometime around 2007 or 2008 i suddenly had about 200 physical servers dumped in my lap and i had to come up with a complete software infrastructure for these servers. i had to design, implement and maintain them by myself with minimal aid from others.

in this article i wrote down the applications i used back then.

how to upgrade from fedora 22 to f23

well its that time of year again. upgrade time. some ppl look forward to it and some dread it.

if you are of the first group then welcome!.

this is how you upgrade your fedora 22 system to fedora 23now the definitive guide to upgrading your system is over here

create repo release rpm

this post is merely a post it note to be used as a reminder and to list the links to a site that walks through writing and creating an rpm of your repo file.

disable application preview in the kde task bar

this one was bugging me for quite a while. i searched for it in my kde system settings / control panel and couldnt find it. i finally decided to move myself and research a bit and voila! it is solved!first of all, what am i talking about? its when you hover your mouse cursor over the application's name in the task bar. when you do that you get a live preview of the application. and when i say live, i do mean live, if you are watching a video or an animation, the preview will update in real time.

it will also take a few seconds to close once you move your mouse cursor away.


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