Adding an Interface to an OpenStack Instance After Creation
In this post I’ll share a few commands I found for adding a network interface to an OpenStack instance after launching the instance. You could, of course, simply launch the instance with multiple network interfaces from the very beginning, but these commands are handy in case you messed up or in case the requirements for the instance changed after it was launched. Please note there’s nothing revolutionary or ground-breaking in the commands listed here; I’m simply trying to help share information in the event others will find it useful.
I tested these commands using OpenStack “Juno” with VMware NSX providing the networking functionality for Neutron, but (as you can tell if you check the articles in the “References” section) this functionality has been around for a while. These commands should work with any supported Neutron plug-in.
First, create the Neutron network port:
neutron port-create <Neutron network name>
If you want to attach a security group to the port (probably a good idea), then modify the command to look like this:
neutron port-create --security-group <Security group name>
<Neutron network name>
Note that you can add multiple --security-group parameters to the command in order to specify multiple security groups on the Continue reading
VMware Shares Fall 20% on Cloud Concerns
The 'secular shift' of clouds and OpenStack looms.
Where’s the Altbier? Notes from SDN World Congress
A top-down approach to NFV and SDN is what's called for by some at SDN World Congress.
Prayer Time at Tokyo Summit
This is something I’ve had the pleasure of organizing at VMworld over the last couple of years, and I’d like to start doing it at the OpenStack Summits as well. So, next week in Tokyo, I’d like to offer Christians attending the Summit the opportunity to gather together for a brief time of prayer before the day’s activities get started.
If you’re interested in attending, here are the details.
What: A brief time of prayer
Where: The pool outside the Grand Prince Hotel New Takanawa (the pool outside the red building on this map of the Summit campus)
When: Tuesday, October 27 through Thursday, October 29, at 8:00 am each day (this should give you time to grab some breakfast before the keynotes and sessions start at 9:00 am)
Who: All courteous attendees are welcome, but please note that this will be a distinctly Christian-focused and Christ-centric activity. This is not to exclude anyone, but rather to focus on like-minded individuals. (I encourage believers of other faiths/religions to organize equivalent activities.)
Why: To spend a few minutes in prayer over the day, the Summit, and the other attendees gathered there
You don’t need to RSVP to let me know Continue reading
5 Lessons from 5 Years of Building Instagram
Instagram has always been generous in sharing their accumulated wisdom. Just take a look at the Related Articles section of this post to see how generous.
The tradition continues. Mike Krieger, Instagram co-founder, wrote a really good article on lessons learned from milestones achieved during Five Years of Building Instagram. Here's a summary of the lessons, but the article goes into much more of the connective tissue and is well worth reading.
- Do the simple thing first. This is the secret of supporting exponential growth. There's no need to future proof everything you do. That leads to paralysis. For each new challenge find the fastest, simplest fix for each.
- Do fewer things better. Focus on a single platform. This allows you to iterate faster because not everything has to be done twice. When you have to expand create a team explicitly for each platform.
- Upfront work but can pay huge dividends. Create an automated scriptable infrastructure implementing a repeatable server provisioning process. This makes it easier to bring on new hires and handle disasters. Hire engineers with the right stuff who aren't afraid to work through a disaster.
- Don’t reinvent the wheel. Instagram moved to Facebook's infrastructure because Continue reading
Worth Reading: The Value of Strategic Network Design
The post Worth Reading: The Value of Strategic Network Design appeared first on 'net work.
Foundational Packet Pushers Podcasts: A List
New to networking? Or maybe just new to Packet Pushers? Want to know which shows will help you build a foundation? Here you go. These shows cover major networking concepts, take on emerging technologies, and provide context for what we might talk about in other shows.
The post Foundational Packet Pushers Podcasts: A List appeared first on Packet Pushers.
IT/IT: Distributed OpenFlow
If I were a bit more snarky, I’d be tempted to say something like, “well, if you add a small hello protocol to each of the applets to monitor neighbor reachability, and a small protocol that can exchange local reachability information, and then perhaps a local algorithm to determine which path is the shortest, you can reinvent IS-IS.” But I’m not that snarky, of course…
I have come to believe that at least half of what we invent in the networking world is simply a product of not spending the time nor effort to study what’s already been invented, or the perception that what’s already been invented is “too complex,” and hence not stuff anyone wants to spend time learning nor understanding. A full three quarters of what remains is Continue reading