Openstack: OpenvSwitch Kernel panic

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When starting openvswtich-swtich or quantum-plugin-openvswitch-agent with enable_tunneling = True the network node kernel panics.The kernel version linux 3.5.0-41-genericOpenvswitch version 1.4.6SolutionUpgrade to Openvswitch version to 1.10.2 from the Havana repositories. add-apt-repository -y cloud-archive:Havana && apt-get update && apt-get install openvswitch-switch

Enabling Virtio drivers in kernel for running androidx86 on Openstack

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Guest operating systems running on virtualised systems needs to cooperate with the underlying hypervisors when using virtualised resources. Virtio is a set of standard for disk and network virtualisation that is required to be installed on instances that runs on Openstack. The default Androidx86 kernel does not come with these modules installed. Also, you have to edit the source code ...

Openstack Grizzly slow API and timeouts

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I have come across this issue a while ago on our Openstack testbed that as the amount of API calls increase, the delay when you do API calls increased. Then I discovered that Openstack does not clean the expired tokens automatically when you are using a SQL backend.https://bugs.launchpad.net/ubuntu/+source/keystone/+bug/1032633To delete the expired tokens I have created a script so that I ...

Openstack Folsom cant ping instance/VM

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The most annoying bug that I came across when setting up Openstack Folsom was that, after creating the a virtual machine it was not able to reach the metadata service and I was not able to reach the virtual machine.After days of debugging, I found out that it was not only me that was having the same issue. Finally it ...

Ubuntu Kernel panic when creating Openstack instance

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Currently I am using Openstack Folsom, nova version 2013.1.4, Installed on Ubuntu 12.04. I upgraded my compute and network nodes's kernel to "Linux 3.2.0-58-generic". Since then, when I try to create an instance on a the compute nodes or when I restart the network node, the systems goes to Kernel panic. The only fix for this issue I found, is ...

No sound on Ubuntu 12.04 after upgrading from 11.10

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I have recently upgraded my Ubuntu 11.10 distribution to Ubuntu 12.04 LTS on my HP pavillion dv6 laptop. This is the output from 'aplay -l' command of my system. card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 0/1 Subdevice #0: subdevice #0 card 0: Intel [HDA Intel], device 1: STAC92xx Digital [STAC92xx Digital] Subdevices: 1/1 ...

Intelligent Agents in a simulated environment

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The following video and the description is about a Agent simulation that I have designed and implemented. I would like to give my gratitude to the "Intelligent Agents" module director Dr. Sam Steel at the University Of Essex for his supervision throughout the module. The simulation shows an "Agent-world" represented by a grid of squares. Agents survive in this ...

Bicycle Actuators Artist Edition playing cards

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The new arrival to my playing card collection. Bicycle Actuators Artist Edition deck has been designed by Lance T. Miller. This is a great piece of art work that was hand drawn by the designer. Only 2500 decks have been printed and all of the decks have been individually numbered. For more information follow the link to the kickstarter project. Lance was grateful enough to sign my deck :)

Install and configure trac on Linux/Ubuntu 11.10

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In this blog post I am going to explain about how to install 'trac' on linux. 'trac' is a nice project management tool which is written in python, that can be used to track your projects. And it is open-source :D (Win) I am using 'trec' with 'git' revision control system, for my project. In my next blog post I ...

Bicycle new fan back (white) Limited edition playing cards deck

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This is the new member of my card pack collection. It is Bicycle fan back limited edition white deck, gold sealed, by Zenneth Kok. These are really rare, as there are less than 1000 copies that have been produced, and I have got one of them. The new fan back black and white decks will be officially released in ...

Set up Alpine to work with Gmail

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To set up Alpine with Gmail, You have you to have Alpine installed on your computer. To set up Gmail, click here to go to my previous blog post which explains how to install it. If you have got Alpine installed then, next To receive emails from your gmail account: Go to the Main Menu >> Setup >> collectionLists >> ...

Read/Receive and Send emails on the linux command line - Alpine/pine

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I like to use my command line to do most of the work rather than using GUIs. So I wanted to be able read and send emails using the linux command line. After done much research I have found this free application called "Alpine" developed at the University Of Washington, which the earlier versions of it was called "Pine". To ...

Secure your Gmail/Google Account

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Are you confidant that your email account is secure anymore? You can never make anything 100% secure but, there are things you can do to make it more secure than it is. Gmail has introduced 2-step verification which protects your gmail account little bit more. I recommend that everyone who read this blog, should enable the feature. To enable: ...

Start Dradis in BackTrack 5

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Back Track 5 comes with Dradis pre loaded already But you might not be familiar with the way you start Dradis in BackTrack 5 To start Dradis: Go to the dradis/server directory root@bt:~# cd /pentest/misc/dradis/server Then run start.sh script in the dradis directory root@bt:/pentest/misc/dradis/server# /pentest/misc/dradis/start.sh ...

No Active Driver when you type in db_driver or db_connect?

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Do you get the following error message when you type in db_driver on Metasploit console on BlackTrack5? [*] No Active Driver [*] Available: [*] DB Support: Enable the mysql driver with the following command: [*] $ gem install mysql [*] This gem requires mysqlclient headers, which can be installed on Ubuntu with: [*] $ sudo apt-get install libmysqlclient-dev [*] DB ...

Lunux/Ubuntu not booting up after the kernel update?

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After I have upgraded to 2.6.38-9-generic kernel I got the following message and I have tried many thing but this is how I have solved the problem. Gave up waiting for root device. Common problems: -Boot args (cat /proc/cmdline) -Check rootdelay= (did the system wait long enough?) -Check root= (did the system wait for the right device?) -Missing modules (cat ...