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OpenStack PHP and OVH

Posted on August 21, 2016 by cyberx86
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Some time ago I built a setup using Amazon’s S3 and Cloudfront that would allow large file uploads/downloads directly from the an S3 bucket, through a Cloudfront endpoint (which provided both a lower latency and allowed using SSL on a … Continue reading →

Posted in: Systems Admin

MCP9701A Thermistor Requires a Stable Input Voltage

Posted on September 1, 2012 by cyberx86
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I’ve always had a bit of a love/hate relationship with computers, so it is not uncommon for me to go a few months feeling a bit apathetic towards them. Recently, I have been getting more into electronics and microcontrollers (it … Continue reading →

Posted in: Electronics Tagged: 7805, AVR, thermistor, voltage

Adding a Notification to Old WordPress Posts

Posted on April 5, 2012 by cyberx86
20

While some articles may be timeless, depending on the type of content being published, many posts have a definite expiry date. It is the double edged sword of rapidly evolving technologies – they improve swiftly, but articles written about them … Continue reading →

Posted in: Software Tagged: plugin, wordpress

WebSockets – Varnish, Nginx, and Node.js

Posted on March 26, 2012 by cyberx86
13

Like many others I have been drawn in by the appeal of websockets and their use in (near) real-time communication. As such one of my current projects uses Node.js and websockets (via socket.io). To maximize compatibility, I would, of course, … Continue reading →

Posted in: Systems Admin Tagged: nginx, nodejs, varnish, websockets

DRBD on Amazon’s Linux

Posted on March 24, 2012 by cyberx86
1

Note: this was done more as an experiment than for something I intended to use in production – so consider it to be more a compilation of notes than a full out procedure. DRBD – Distributed Replicated Block Device – … Continue reading →

Posted in: Cluster, Systems Admin Tagged: drbd

Varnish – Nothing but 503s

Posted on March 12, 2012 by cyberx86
14

I use Varnish on my production server without any issues – it works quite well, and I have come to consider it an essential component in my server stack. I have recently been having a bit of trouble with a … Continue reading →

Posted in: Systems Admin Tagged: selinux, varnish

Windowless VirtualBox VMs (Windows Host)

Posted on March 11, 2012 by cyberx86
4

Since I haven’t gotten around to playing with VMware or xen yet – VirtualBox is what I am using for virtualization in my test environment. Under Windows I like to use PuTTy to connect to my VMs – even those … Continue reading →

Posted in: Systems Admin Tagged: command prompt, powershell, virtualbox

Directly connecting to PHP-FPM

Posted on February 1, 2012 by cyberx86
13

When it comes to troubleshooting, it is ideal to be able to isolate each component of a system. In the case where multiple connected items are performing correctly, they can sometimes be grouped together – however, if one of these … Continue reading →

Posted in: Systems Admin Tagged: fastcgi, php-fpm

Autoscaling with custom metrics

Posted on January 23, 2012 by cyberx86
6

One of the appeals of cloud computing is the idea of using what you need when you need. One of the ways that Amazon provides for this is through autoscaling. In essence, this allows you to vary the number of … Continue reading →

Posted in: Cluster, Systems Admin Tagged: autoscaling, cloudwatch, EC2

WordPress – SSL login page without SSL admin

Posted on January 1, 2012 by cyberx86
15

In WordPress (v3.3), FORCE_SSL_LOGIN will transmit login credentials over SSL, however, the login page itself may be accessed over HTTP (as opposed to HTTPS). If the login page is accessed via HTTP, the user has no (easy) way of verifying … Continue reading →

Posted in: Systems Admin Tagged: nginx, ssl, wordpress

Easy Windows-Linux File Sharing with a LiveCD

Posted on December 23, 2011 by cyberx86
10

The intent of this article is to address a very specific case – it is not meant as a best practices guide. Scenario: A. You have a windows computer (Computer 1) with files that are remotely accessed from second windows … Continue reading →

Posted in: Software Tagged: file sharing, linux, Samba

Building Ice Cream Sandwich (Android v4) for VirtualBox on EC2

Posted on December 11, 2011 by cyberx86
21

This was completed 2 weeks ago, but I am only now getting around to posting it online. This experiment was purely for the fun of it – I don’t own (or want) a cell phone, and have never used Android. … Continue reading →

Posted in: Multiboot Tagged: Android, EC2, ICS, linux

Installing Corosync on EC2

Posted on December 8, 2011 by cyberx86
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The notes for this have been sitting on my computer for almost 6 months, but a comment from today spurred me onto editing, updating, and posting them. Corosync is a messaging layer used for high-availability. It serves essentially the same … Continue reading →

Posted in: Cluster Tagged: cluster, corosync, ha

Adding Swap Space to an EC2 Instance

Posted on November 28, 2011 by cyberx86
9

The t1.micro instance comes with only 602MB of memory. Especially under high load, it is quite easy to deplete the available memory – and since no swap space is enabled by default, this can quickly lead to a server becoming … Continue reading →

Posted in: Systems Admin Tagged: EC2, Elastic Block Store, swap

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