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The mystery of stale haproxy processes 11 Jul 2013 | 05:24 am
We had the situation with our haproxy-based load balancers where our monitoring alerts were triggered by the fact that several haproxy processes were running, when in fact only one was supposed to be ...
Some gotchas around keepalived and iproute2 (part 1) 31 May 2013 | 11:09 pm
I should have written this blog post a while ago, while these things were still fresh on my mind. Still, better late than never. Scenario: 2 bare-metal servers with 6 network ports each, to serve as ...
Setting up keepalived with Chef on Ubuntu 12.04 20 Apr 2013 | 01:26 am
We have 2 servers running HAProxy on Ubuntu 12.04. We want to set them up in an HA configuration, and for that we chose keepalived. The first thing we did was look for an existing Chef cookbook for k...
Using wrapper cookbooks in Chef 3 Apr 2013 | 03:58 am
Not sure if this is considered a Chef best practice or not -- I would like to get some feedback, hopefully via constructive comments on this blog post. But I've started to see this pattern when creati...
Installing ruby 2.0 on Ubuntu 12.04 18 Mar 2013 | 08:55 pm
I wanted to find a way to install ruby 2.0 on Ubuntu 12.04 via Chef, without going the rvm route, which is harder to automate. After several tries, I finally found a list of .deb packages which are ne...
No snowflakes allowed 7 Mar 2013 | 03:44 am
"Snowflake" is a term I learned from my colleague Jeff Roberts. It is used in the Chef community (maybe in the configuration management community at large as well) to designate a server/node that is '...
Video and slides for 'Five years of EC2 distilled' talk 6 Mar 2013 | 06:49 am
On February 19th I gave a talk at the Silicon Valley Cloud Computing Meetup about my experiences and lessons learned while using EC2 for the past 5 years or so. I posted the slides on Slideshare and t...
A workflow of managing Chef with knife 8 Feb 2013 | 04:10 am
My colleague Jeff Roberts has been trying hard to teach me how to properly manage Chef cookbooks, roles, and nodes using the knife utility. Here is a workflow for doing this in a way that aims to be a...
Some gotchas when installing Octopress on Ubuntu 5 Feb 2013 | 05:54 am
Here are some quick notes I took while trying to install the Octopress blog engine on a box running Ubuntu 12.04. I tried following the official instructions and I chose the RVM method. The first gotc...
IT stories from the trenches #2 2 Feb 2013 | 08:35 am
The year was 1996. I was a graduate student in CS at USC. My first contact with Unix (I had started my career as a programmer in C++ under DOS and later Windows 3.1; yes, I am dating myself big time h...
