Mostrar / Ocultar Avisos

Creating A Fully Encrypted Para-Virtualised Xen Guest System Using Debian Lenny

Creating A Fully Encrypted Para-Virtualised Xen Guest System Using Debian Lenny

This document explains how to set up a fully encrypted
para-virtualized XEN instance. In this howto, the host system is
running Debian Etch, while the guest system to be installed will be
using Debian Lenny. If you are concerned about your privacy, you might want to
consider using hard disk encryption to protect your valuable
private data from spying eyes. Usually, the easiest way would be to
use your distribution’s installer to set up a fully encrypted
system; I think most recent Linux distributions support this.
However, when you are using XEN to provide virtualization, there
are situations where you might not want to encrypt your whole
computer with all guest instances, but instead only encrypt one OS
instance. This howto will deal with exactly this situation. It
assumes that the XEN host system is already up and running.

View Original Article

Blogged with the Flock Browser

Generating Website Statistics With Piwik, An Open-Source, Google Analytics-Like Web Analytics Tool

Generating Website Statistics With Piwik, An Open-Source, Google Analytics-Like Web Analytics Tool

This guide explains how you can install and use Piwik
for generating website analytics. The reports generated by Piwik are
similar to the ones generated by Google Analytics. Piwik is an
Open-Source (GPL) tool that you can download and host on your own
servers which means you are in full control over your data. In addition
to that, Piwik’s functionality can be extended by plugins.

View Original Article

Blogged with the Flock Browser

Xen: How to Convert An Image-Based Guest To An LVM-Based Guest

Xen: How to Convert An Image-Based Guest To An LVM-Based Guest

This short article explains how you can move/convert a Xen guest
that uses disk images to LVM volumes. Virtual machines that use disk
images are very slow and heavy on disk IO, therefore it’s often better
to use LVM. Also, LVM-based guests are easier to back up (using LVM snapshots).

View Original Article

Blogged with the Flock Browser

FreeBSD: NIC Bonding / Link Aggregation / Trunking / Link Failover Tutorial

Comparable to nic teaming in linux, this tutorial shows you how to achieve Link Aggregation using the FreeBSD, or rather OpenBSD’s, LAGG driver.
clipped from www.cyberciti.biz

I‘ve two Intel gigabit network card installed in HP server. I know how to setup bounding under CentOS Linux, but I’d like to do same under FreeBSD. How do I setup link aggregation of multiple network interfaces as one virtual trunk interface for the purpose of providing fault-tolerance and high-speed links under FreeBSD 7.x server?

FreeBSD has lagg - link aggregation and link failover interface. The lagg interface allows aggregation of multiple network interfaces as one virtual lagg interface for the purpose of providing fault-tolerance and high-speed links.

  blog it

High-Availability Storage Cluster With GlusterFS On Ubuntu

clipped from www.howtoforge.com

1. Introduction


GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86-64 server with SATA-II RAID and Infiniband HBA.


In this tutorial I will show you how to install GlusterFS in a scalable way to create a storage cluster, starting with 2 servers on Ubuntu 8.04 LTS server. Files will be replicated and splitted accross all servers which is some sort of RAID 10 (raid 1 with < 4 servers). With 4 servers that have each 100GB hard drive, total storage will be 200GB and if one server fails, the data will still be intact and files on the failed server will be replicated on another working server.

  blog it

TimeWarner Fails!

Where to begin, I guess I should just start at the end of my work day and recap until now, 2 hours later.

I signed up for Time Warner “High Speed” internet about a month ago, and from day one I realized the speed was MUCH less than what I am paying for, but due to work and travel, I hadn’t decided to embark on what now turned out to be a very long and frustrating adventure.

Time Warner promises 15mbps download, bursts up to 20mbps. So what did I receive for my $44.98/mo? Nothing but a whopping 5mbps download, just a THIRD of what the minimum is. Needless to say, this speed is hardly adequate for the modern internet as we all know it today.

Today after work, I had some time to spare, so I decided to call Time Warner with all the data that I’ve collected over the past month. The first call, after many “automated menu options”, I encountered a 1st Level tech by the name of Ryan, who asked me all the regular questions a 1st level tech should be expected to ask.

  • Do you have security software installed on your computer?
  • Do you have antivirus or firewall software installed on our computer?
  • Are you plugged directly into your cable modem?

Of course I have ran many tests on my end to insure the problem was not with my equipment. Let me note here that I have several cisco high end commercial routers, a pfSense gateway/ap/router, and a fairly new asus wireless router in place, all have been tested directly connected to the modem.

So after going back and forth with him about these questions, answering them all honestly, I provide him with a traceroute, a speed test from speedtest.net, and a speed test from http://speedtest.peakview.rr.com/ (per his suggestion)

Finally, I think I’m getting somewhere, he’s going to transfer me to level 2, when, of course we get disconnected, beautiful. Now I have to look forward to going through the automated system once again, talking to yet another level 1 tech, and getting nowhere still! Luckily I’ve been in technical support before, and made sure to note reference numbers and names throughout the process.

Here we go, second call, at this point I’m feeling confident he has noted the proper amount of information and I can skip right past the level 1 technician. I get on the phone, finally talking to someone and they see in the notes “Can not connect to the internet” . COME ON!! REALLLLY?? You would think that someone with 10 years experience dealing with all realms of internet technology that they would be able to at least connect to the internet!

Well, believe it or not, we got disconnected. This really has nothing to do with my cell phone, as I use a Sprint AIRAVE connected through this AWESOME Time Warner connection (sarcasm!)

Third call, and what would seem to be my final call before I decided to jot all this down in a fury of aggravation. Same business, call, wait, level 1 technican, etc. Finally I’m being transferred to a Level 2 technician, oh yay!!

So I wait on hold, and I wait, and I wait.. I know, from having done technical support, people are always saying “I was on hold for 30 minutes!!!” , when actually it was about 10 minutes, just waiting seems much longer than it really is, but this time it was ACTUALLY 40 minutes on hold. You can see in the picture of my call log below, that I’ve had several 20 minute long conversations, plus the 40 minutes of listening to their crappy music.

So I get a hold of the guy finally after waiting for 40 minutes, he gets my information ONCE again, phone number, verify address, name, last 4 social, come really.. and guess what, disconnected while he is looking up my “equipment details” <-- last straw

Just be warned, if you buy something from Time Warner, prepare to get ripped off. They over sell their bandwidth, have terrible terrible technical support, and really could care less about their customers. PLEASE for the love of god, research alternate places for high speed internet, because with Time Warner you are bound to be screwed.

Example:

Kirk McKusick’s FreeBSD Kernel Internals course

I was looking at this about a year ago, and tried to find something about it online besides McKusick’s website to see the first course, or any information about it at all and came up empty.

It seems now though that the first lecture from Kirk McKusick’s full length FreeBSD Kernel Internals course has been posted to the BSD Conferences channel on YouTube.

I’m going to watch it tonight when I get home :)

Yet Another Reason To Get Open Source Software

This is a great idea.
clipped from www.cyberciti.biz

The USB Overdrive is a device driver for Mac OS X that handles any USB mouse / trackball / joystick / gamepad and any Bluetooth mouse from any manufacturer and lets you configure them either globally or on a per-application basis. Some one posted a screen shot of USB Overdrive software. If you are a sensitive pirate you might feel guilty (found via Digg). Maybe it is a time to switch to Linux.

  blog it

Updated to the new WP Version

So many improvements with this version of wordpress. I’ve upgraded this thing 100 times never really saw much change but 2.7 is very nice.

LISA ‘08

I’m pretty excited about going to this conference in San Diego this year. I haven’t been before to any LISA conferences. Mostly I will be going to learn more about Virtualization with Xen and VMWare ESXi

Anyway, if you’re going.. hope to see you there!!

I'm going to LISA '08