How do you increase a KVM guest's disk space?

Tue, 05/01/2012 - 17:02 — Mathew Branwell

How do you go about increasing KVM virtual machine guest's disk space from the command line if you initially set insufficient amount of disk space?

  1. Shutdown the VM
  2. Move the current image
    mv mykvm.img mykvm.img.bak
  3. Create a new image
    qemu-img create -f raw addon.raw 30G
  4. concatenate the 2 images
    cat mykvm.img.bak addon.raw >> mykvm.img
  5. start the VM (using the newly created mykvm.img)
  6. run fdisk inside VM and delete & re-create LVM partition
    % fdisk /dev/vda
...

Partition X does not end on cylinder boundary

Tue, 05/01/2012 - 16:32 — Mathew Branwell

While reviewing the partion layout on one of my hard drives, I noticed a number of “Partition X does not end on cylinder boundary” messages in the fdisk output:

$ fdisk /dev/sda
Command (m for help): p
!REG3XP1!>
Disk /dev/sda: 80.0 GB, 80000000000 bytes
255 heads, 63 sectors/track, 9726 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xac42ac42
 
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          26      204800   83  Linux
Partition 1 does not end on cylinder boundary.

Virt-manager keymap problem on OS X

Sun, 04/29/2012 - 19:42 — Mathew Branwell

virt-manager keymaps on OS X
Published on Wed, 17 Nov 2010 20:12:26 +0000 in Uncategorized. 13 Comments

How to completely remove APF from Ubuntu

Wed, 04/18/2012 - 15:44 — Mathew Branwell

Running 'apt-get remove --purge apf-firewall' often times is not enough, especially if you tried to modify APF's files and paths. So to completely clean up your Ubuntu system form APF (Advanced Policy Firewall) your also need to run the following commands:

root@host:/etc/apt# rm -rf /var/lib/dpkg/info/apf*
root@host:/etc/apt# rm -rf /usr/src/apf*
root@host:/etc/apt# rm -rf /usr/share/man/man1/apf*
root@host:/etc/apt# rm -rf /usr/share/doc/apf*
root@host:/etc/apt# rm -rf /usr/local/sbin/apf
root@host:/etc/apt# rm -rf /usr/sbin/apf
root@host:/etc/apt# rm -rf /etc/rc0.d/K20apf*

How to install XHProf profiler on Ubuntu

Tue, 04/17/2012 - 18:47 — Mathew Branwell

XHProf profiler is developed by Facebook and open sourced in March 2009 under the Apache 2.0 license. XHProf is a function-level hierarchical profiler, with a PHP extension (written in C) to collect the raw data, and a few PHP scripts for the reporting/UI layer.

The easiest way to get it is via the PEAR installer (package home):

install php5-common
pear channel-update pear.php.net
pecl install xhprof

Once you have XHProf installed, you should enable it. Open your /etc/php5/conf.d/xhprof.ini and add

[xhprof]
extension=xhprof.so

Web based virtualization management applications

Sat, 04/14/2012 - 04:08 — Mathew Branwell

openQRM is the next generation, open-source Data-center management platform. Its fully pluggable architecture focuses on automatic, rapid- and appliance-based deployment, monitoring, high-availability, cloud computing and especially on supporting and conforming multiple virtualization technologies. openQRM is a single-management console for the complete IT-infra structure and provides a well defined API which can be used to integrate third-party tools as additional plugins.

http://www.openqrm.com

How to create and clone a KVM virtual machine on Ubuntu Server

Sat, 04/14/2012 - 03:45 — Mathew Branwell

After having KVM installed in your system, you can easily create a guest virtual machine by running the following command:

vmbuilder kvm ubuntu --suite lucid --flavour virtual --iso /opt/iso-images/ubuntu1004.iso --dest=/home/destination --arch amd64 --libvirt qemu:///system --hostname ubuntu --bridge br0 --ip xxx.xxx.xxx.xxx --mask 255.255.255.248 --gw xxx.xxx.xxx.xxx --user ubuntu --name Ubuntu --pass ubuntu --rootsize 110000 --swapsize 1824 --mem 1824 --addpkg acpid --addpkg rsync --addpkg openssh-server --addpkg nano

After having your guest virtual machine up and running you might want to utilize one of the things that's very useful when using virtual machines - the ability to clone them.

Power up Drupal search with Jetty & Apache Solr in Ubuntu 10.04

Thu, 04/12/2012 - 20:31 — Mathew Branwell

If you are running a big site with loads of visitors or just running a
normal site with very minimal resources your basic Drupal search
functionality might slow down your site significantly. And it's not even
very efficient solution to search all the contents of your site. Don't
worry, the help is here. Apache Solr
helps you with your site's search functionality and makes it blazingly
fast! In this first part of Apache Solr walk through we are going to
install and configure Apache Solr + Jetty with Drupal.

GPG error: http://archive.ubuntu.com lucid Release: The following signatures were invalid

Thu, 04/12/2012 - 04:45 — Mathew Branwell

If running 'apt-get update' you get the error:

Reading package lists... Done
W: GPG error: http://archive.ubuntu.com lucid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>

then

cd /var/lib/apt
 mv lists lists.old
 mkdir -p lists/partial
 apt-get clean
 apt-get update

How to remove/turn off/disable Linux KVM virbr0 NAT Interface

Thu, 04/12/2012 - 02:01 — Mathew Branwell

A virtual bridge, can be defined as a device that bridges virtual interfaces. It provides an easy means of networking virtual networking devices such as venet (virtual network) or veth (virtual ethernet).

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