Yet Another Geek's Blog

A collection of wee snippets salvaged from the server room floor. Dabblings in:

Recent Posts...

PostgreSQL Replication: Failover

2016-03-14T20:30:00Z

I've spent the last few days equipping myself with the knowledge I need to support failover of our data tier from production to disaster recovery and vice-versa. In the lab I built a series of PostgreSQL Servers and set up replication between them. In this article I explore failover. Failover Scenario I'm…

PostgreSQL: Basic Replication with Synchronous and Asynchronous Hot Stand-by

2016-02-11T20:30:00Z

I've spent the last few days equipping myself with the knowledge I need to support failover of our data tier from production to disaster recovery and vice-versa. In the lab I built a a series of PostgreSQL Servers and set them up replication between them. This article describes how. The Desired…

Using the PowerShell Get-DhcpServ4Lease Cmdlet

2016-01-31T12:00:00Z

During the course of normal day-to-day system administration I found on a number of occasions that I had PTR records that would not resolve. I suspected there was an issue with the configuration of the DHCP Server running on our Microsoft AD Domain. My first step was confirming the problem.…

Windows Deployment Services and the Get-WdsDriverPackage Cmdlet

2016-01-27T19:30:00Z

I made the fatal mistake of importing 133 driver packages into a Windows Server 2012 Instance of Windows Deployment Services without adding them to a driver group. Needless to say, when I imaged a machine using WDS dependent on some of those drivers, they were not automatically installed. I wanted to…

Windows Remote Backup using OpenVPN and Robocopy

2016-01-04T20:30:00Z

It's not unusual for friends and relatives to ask for my help and/or advice when it comes to their own laptops, computers and Internet connections. This festive/new year period has been no exception. I took on the responsibility of setting up a laptop for a relative to use in their…

Migrating WSUS from 3.0 SP2 to Server 2012 r2

2015-12-30T20:30:00Z

Migrating Windows Server Update Services from Windows Server 2008 R2 (WSUS 3.0 SP2) to Windows Server 2012 R2. This guide is applicable to WSUS installations using the Windows Internal Database. Pre-requisite Steps Install the WSUS role on the destination server and run through the Windows Server Update Services Configuration Wizard. Backup Binaries and…

Creating an LXC Containerized Selenium Grid

2015-12-08T20:30:00Z

This guide shows you how to build one or more self-contained Selenium grids using: Ubuntu Server 14.04.3 LTS Selenium Server 2.48.2 LXC containers for each grid node - this means we can run more tests in parallel without running into Selenium/Firefox mutex problems vnc4server and Openbox to provide a desktop - sometimes developers like…

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