Mininet SDN teaching tool

Mininet is a Linux-based network emulator which enables the creation of a realistic virtual network, running real kernel, switch and application code, on a single machine (VM, cloud or native), in seconds, with a single command. It is a great way to develop, share, prototype, research, teach and experiment with OpenFlow and Software-Defined Networking systems.

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Defragging the vocational education IT curriculum

Traditionally, vocational education and training (VET) has aimed to equip people with the skills required to perform specific tasks within specific job roles. In Australia’s TAFE system, these skill requirements are defined in consultation with industry to produce the competency based training packages that effectively define the training curriculum for teachers and students.

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Ansible control centre

This post describes one way to configure a computer to centrally manage an IT training lab using Ansible. The control centre computer could be physical or virtual, headless or not, a laptop, a desktop or anything else: the only real requirements are that the device can bring up a CLI (command line interface) in a terminal, that the vi text editor is installed, and that normal SSH infrastructure is in place.

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Advanced open source networking resources

gearsIt is no secret that most corporate and industrial computing resources in the world today have now been migrated from physical infrastructure to a combination of public, private and hybrid cloud environments. A similar trend is now under way in the networking space, with network control logic shifting from proprietary hardware-based platforms to open source software-based platforms (SDN or Software Defined Networking).

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Open source tech education culture at Penn Manor

wowPenn Manor is a short film sponsored by Red Hat as part of the Open Source Stories series. The film tells the story of Penn Manor, a secondary school in the United States in which IT director Charlie Reisinger introduced open source software and culture as part of a 1:1 laptop program. Open source was integral to the program because Reisinger wanted students to become “engineers, inventors, and architects and not technology tourists”.

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CentOS 7 firewalld NAT router

gearsThis post outlines how to build a simple router using firewalld and dnsmasq on CentOS 7.3. The problem this router solves for us at SuniTAFE is that it isolates virtual networks being built or used by students on VMWare ESX hosts from the main college network, while still allowing student access to the college network for DNS forwarding and internet access purposes.

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Update CentOS 7 to Golang 1.6

wowCentOS 7 is a rock-solid development and production platform, but this stability often means that default web-related packages are outdated. It turns out golang is no exception: the default CentOS 7 version is 1.4, whereas I wanted 1.6. There have been some changes in golang project layout between the two versions and I figured I may as well get with the program and update before starting a new API project.

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