Scott's Weblog The weblog of an IT pro specializing in virtualization, networking, open source, and cloud computing

Technology Short Take #52

Welcome to Technology Short Take #52, the latest collection of news, links, and articles from around the web on data center technologies.

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VLAN Trunking with Mikrotik RouterOS

In this post, I’m going to show you how to configure VLAN trunking with Mikrotik RouterOS, and along the way provide a brief introduction to this software and some of the functionality it offers. While it is Linux-based, RouterOS operates quite a bit differently than a lot of the other network operating systems with which I’ve worked, and so I hope that this post will help ease the learning curve a bit for others who decide to take the same path.

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A Fix for Ubuntu Apparently Caching Network Configuration

I’ve been wrestling with an Ubuntu network configuration issue over the last couple of weeks (off and on between working on other projects), and today I finally found a fix for the problem. The issue was that Ubuntu wouldn’t pick up changes to network interfaces. The fix is so simple I’m almost embarrassed to talk about it (it seems like something that I should have known), but I’m posting it here in case others run into the same issue.

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VLAN Trunking with Cumulus Linux

Following up on my earlier post on Cumulus Linux networking concepts, I wanted to build on that information with a guide on configuring VLAN trunking. This would be useful in a number of different scenarios: supporting multiple (VLAN-backed) port groups on vSphere hosts, or connecting an Open vSwitch (OVS) bridge on a KVM or Xen hypervisor to multiple VLANs. You might also need to use a VLAN trunking configuration to connect a Cumulus Linux-powered switch to another switch.

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DockerCon Vendor Briefings

At DockerCon 2015 in San Francisco, I had the opportunity to meet with a few vendors in the Docker ecosystem. Here are some notes from my vendor briefings.

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Liveblog: Scaling New Services

This is a liveblog for the DockerCon 2015 session titled “Scaling New Services: From Container Creation to Automated Deployments”. This session is being led by the Disney Systems Engineering team and will feature a discussion/demo involving Docker, Mesos, Chef, Consul, and HAProxy.

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Liveblog: DockerCon 2015 Day 2 General Session

This is a liveblog from the day 2 general session at DockerCon 2015. I was running late from some early morning meetings (sorry folks), so I wasn’t able to catch the first part of the general session (about the first 15 minutes or so). Here’s what I was able to capture.

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Liveblog: Docker Networking

This is a liveblog of the Docker Networking breakout session. This session is led by Madhu Venugopal and Jana Radhakrishnan, both formerly of Socketplane (and now with Docker following the acquisition). They are introduced by John Willis, also formerly of Socketplane and well-known within the DevOps community.

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Liveblog: Secret Session (Docker Plugins)

This is the “Top Secret Docker Session led by Gordon the Turtle,” which is really a session on Docker Plugins. However, since Docker Plugins were only announced this morning during the general session, the title for this session had to be obscured. On stage are ClusterHQ (Luke Marsden), Glider Labs (Jeff Lindsay), and Weaveworks (Alexis Richardson).

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Liveblog: Resilient Routing and Discovery

This is a liveblog of the DockerCon 2015 session on resilient routing and discovery, part of the “Advanced Tech” track. Simon Eskilden (@Sirupsen on Twitter) from Shopify is the speaker for this session.

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