Armand Halbert
Customer Success Engineer

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Assiging an AWS Elastic IP In Place

Posted in: Blog, Friday, March 31, 2017

Often, I find myself starting up an AWS cluster, but have forgotten to assign an Elastic IP. However, you cannot change the IP in the AWS console without shutting down and restoring the cluster(a lengthy process)

$ aws redshift modify-cluster --cluster-identifier CLUSTER --elastic-ip IP

An error occurred (InvalidParameterCombination) when calling the ModifyCluster operation: The request to attach the Elastic IP address must include setting PubliclyAccessible to true.

$ aws redshift modify-cluster --cluster-identifier CLUSTER --elastic-ip IP  --publicly-accessible

An error occurred (InvalidClusterState) when calling the ModifyCluster operation: The cluster is already publicly accessible.

This is quite the Catch-22 - You can’t modify it unless you’re setting it to --publicly-accessible and you can’t set it to --publicly-accessible unless because you’ve already set it! However, there is a hack around it:

$ aws redshift modify-cluster --cluster-identifier CLUSTER --no-publicly-accessible

$ aws redshift modify-cluster --cluster-identifier CLUSTER --elastic-ip IP --publicly-accessible

You reassign the IP by turning off --publicly-accessible, and then assigning the Elastic IP while setting --publicly-accessible​ at the same time.

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Posted in: Reviews, Monday, July 18, 2016

One of the things I like the most about franchised media is how it can continuously be re-invented and reinterpreted for modern times and audiences, while remaining true to its myth. How many times have superheroes been reborn, shakesphere redone, and classic literature retold? However, rebooting a video game franchise is a sign of trouble: a quick look at the wikipedia list of reboots is a graveyard of once great franchises with lackluster sequels. I’m happy to say that DOOM (2016) does not fall into this trap.

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Posted in: Reviews, Monday, January 18, 2016

After a mild equivalent of a space winter post-Apollo, the world is getting excited about space again. Spacex, mars colonization, and fears of extinction have stimulated the public’s imagination for space exploration again.

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Posted in: Reviews, Tuesday, December 29, 2015

Labryinth is one of the few films made for a generation not yet born. It’s supposedly a children’s film, but it bombed in the box office only to become a millennial cult classic. It has most of the things that were successful about 80s pop-cinema, or at least the things we thought we liked about it. The puppetry is done by Jim Henson, music by David Bowie, and liberally uses the tropes of children’s fantasy from the period. And yet, the tropes presented here are cynically reinterpreted through mass media spectacle, capitalism, and Freud. The standard fairy tale is twisted into a teenage girl’s masturbatory fantasy while acknowledging the magic that made us fall in love with the genre in the first place.

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From Bash to Zsh

Posted in: Tech, Thursday, November 19, 2015

This is not the first time I had tried to switch to zsh, but after running into problems with bash that could have been fixed by using zsh, I decided to give it another go. I ended up picking this book since it compared bash and zsh, offering an easy zsh upgrade path by showing you how to duplicate your bash configuration in baby steps.

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Modern Romance

Posted in: Reviews, Friday, October 02, 2015

After hearing Aziz Ansari discuss his book on the Freakonomics podcast a few weeks ago, I decided to get a copy of Modern Romance from Amazon. In his book, Ansari teams up with sociological experts to discuss how technology has changed how we form and maintain romantic relationships. In addition, he set up a subreddit for ordinary people to tell their stories of romance from around the globe. It is a short read, but remarkably empirical, using stories to illustrate data rather than picking the most lurid stories and spinning them - he finds that online dating and texting have their benefits and problems, and suggests ways to improve the modern romance experience.

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Lord Of War

Posted in: Reviews, Sunday, September 06, 2015

Soon there’s gonna be a knock on that door and you will be called outside. In the hall there will be a man who outranks you. First, he’ll compliment you on the fine job you’ve done, that you’re making the world a safer place, that you’re to receive a commendation and a promotion. And then he’s going to tell you that I am to be released. You’re going to protest. You’ll probably threaten to resign. But in the end I will be released. The reason I’ll be released is the same reason you think I’ll be convicted. I do rub shoulders with some of the most vile, sadistic men calling themselves leaders today. But some of those men are the enemies of your enemies. And while the biggest arms dealer in the world is your boss, the President of the United States, who ships more merchandise in a day than I do in a year… sometimes it’s embarrassing to have his fingerprints on the guns. Sometimes he needs a freelancer like me to supply forces he can’t be seen supplying. So… you call me evil. But unfortunately for you, I’m a necessary evil.

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Introducing Vimjects

Posted in: Technology, Saturday, August 29, 2015

I wrote my first amateur vim plugin, vimjects. It’s designed to source project-specific vim configurations, so that you can set options specific to your project.

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Vampire the Masquerade: Bloodlines

Posted in: Reviews, Friday, July 24, 2015

It’s too bad the Vampire mythos has been reduced to the tween paranormal romance genre recently: they are one of the best monsters ever created, far more interesting the zombies of our current pop-zeitgeist; Unlike faceless hordes, Vampires manage to maintain a strong element of tragedy even when breaking our strongest taboos. Despite their threat to us, we ultimately root for the vampires for Vampires need not be monsters by nature. The Camarilla’s traditions that demand Kindred hold on to their humanity prevents the killing of innocent mortals, and the local blood banks are happy to sell to vampires. The reason they hide from is the same reason we reject them - fear. Instead a parallel world is created in image of our own society - the World of Darkness.

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Alfred Baseconverter

Posted in: Technology, Sunday, June 28, 2015

I wrote a small workflow for Alfred 2: A system for converting between various bases in Alfred 2.

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My time at the NIH

Posted in: Blog, Monday, September 01, 2014

Recently, I completed my internship at the NIH. I really enjoyed my work there, as I got an introduction to data science, bioinformatics and developed a lot of practical skills developing software for non-programmers.

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Openhatch Workshop

Posted in: Technology, Tuesday, March 11, 2014

I attended an openhatch session last Sunday. Openhatch is a university workshop to help students start contributing to open source software. At the workshop, we were taught a bit about the open source community, git, IRC and bug trackers. We then learned about contributing on github. Breakfast and lunch was provided by the event.

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Installing Tern for Vim

Posted in: Technology, Sunday, November 03, 2013

Recently, I started working on some javascript projects, and I sorely missed autocompletion provided by PyCharm and WebStorm. I found the tern project, which offers powerful javascript autocompletion in vim with YouCompleteMe. Setting it up however, was painful. For others trying to install tern for vim, here are the instructions:

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Adding the Weather to the tmux status bar

Posted in: Technology, Wednesday, October 30, 2013

I decided to add a weather feature in my tmux status bar. I saw this could be done via powerline, and I initially tried to add it through there. I gave up after a few hours of trying to patch my fonts, although I must say powerline looks nice done right.

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On Sorting Badly

Posted in: Technology, Tuesday, October 29, 2013

Recently, I saw this hilarious StackOverflow post: How bad a sorting algorithm can you make? Apart from the jokes, me and a few friends set out to make the worse algorithm we could in these constraints.

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Interview Retrospective

Posted in: Technology, Friday, October 25, 2013

I had an internship interview today. My thoughts on how it went:

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Her Fearful Symmetry

Posted in: Reviews, Tuesday, October 01, 2013

Often the labels we use to describe ourselves are a prison of our own making. We so closely identify with them that change is impossible, even if the label will kill ourselves. In Her Fearful Symmetry, Audrey Niffenegger tells a story of people defined by labels imposed by the world and themselves.

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Posted in: Reviews, Tuesday, August 13, 2013

We’d like to offer the depressed comfort in the form of a single life-changing pep talk. But in reality, depression eats away at the belief you can be happy again. Perhaps this is why feel-good films are poor fare; If only it were easy to believe that things will be better. Melancholia does not attempt to make anyone feel better, only offering sympathy and understanding. But it offers more solace to the depressed than any happy ending could ever hope to.

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Posted in: Reviews, Friday, April 05, 2013

Netflix has been pushing me to watch Cashback(2006, Sean Ellis) for a long time now, and so on a rainy Monday spent procrastinating, I brought it up. After watching the film, I’m a little hurt that the Netflix algorithm thinks so poorly of me. Never have I seen a film this misogynistic, this objectifying, this disturbing. The film promotes the nerd “nice guy” narrative, features plenty of soft-core nudity, and portrays sexual assault as romantic. All this is done while trying to convince us that the protagonist is still a great guy. As far as adolescent wish-fulfillment fantasies go, it doesn’t get much better than this.

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Hackers and the Politics of Identity

Posted in: Technology, Tuesday, April 02, 2013

The title “hacker” is back in vogue. Once a title that even denizens of Slashdot and Sourceforge reluctantly used, the rise of startup culture 2.0 has inspired a revitalization of the phrase. Hacker News, the leading technology aggregator, is chock full of recruitment ads for “iOS hackers”, “Rails hackers” or just “hackers”. All of them promise the sky to these enlightened individuals.

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