I am from Wikidot.com (http://www.wikidot.com) - the online service that allows people to set up and run wikis. Actually we are one of the top wiki providers, mostly for individual users and communities.
Anyway, we have been using Chef since 0.7. in September 2012 we have moved 100% to AWS and now we use Chef to manage up to 40 EC2 instances: database servers, web servers, workers, Memcached servers – everything: from assembling RAID arrays, configure logging, installing numerous software dependencies to deploying applications and fine tuning configs.
We use Chef in combination with CloudFormation, which works just great. We include initial DNA in the instance’s metadata in JSON.
Since we are a heavy AWS user (and our project is simply cool) we have been lucky enough and made it to AWS Global Start-Up Challenge semi-finals: http://aws.amazon.com/startupchallenge/2012/
Guys, I wanted to say thanks to Opscode and all Chef contributors. Chef works great for us and we much more enjoy “programming the infrastructure” than configuring individual servers.
I would also like to share some of the solutions we use, but need to figure out how to do it best. If you have any questions about our Chef usage I will be glad to answer.
Thanks and cheers,
CEO of Wikidot Inc.