No, we've combined bits & bobs that Heroku has open sourced (check ddollar's repos on github) with our own Ruby/CoffeeScript/Lua/Bash glue on dedicated hosting. There's a single OS image and compiled binaries for software stored in Ceph's S3-compatible distributed storage, and everything else is applications and buildpacks stored in git
The build server takes URLs for an app and a buildpack, runs the buildpack to do any dependency fetching/compilation/etc, bundles up the output into a .tar.gz file that contains everything necessary to boot up on the standard LXC image, and uploads it into the distributed storage. Then when we want to boot 1 or 2 or 10 of that app, we just grab the gzipped "slug" and boot it up on an ephemeral LXC containers (i.e. a single base image + temporary overlay file system)
This system can build a rails web app, a node.js app, other services like mysql/redis/nginx, and even the build server itself
So the bootstrapping is a little tricky, but e.g. the process to run a build may go git -> api -> mysql/redis -> worker -> build server -> ceph/s3, and each of those pieces themselves is built/deployed/managed the same way, which we've found to be a huge win for maintainability
The build server takes URLs for an app and a buildpack, runs the buildpack to do any dependency fetching/compilation/etc, bundles up the output into a .tar.gz file that contains everything necessary to boot up on the standard LXC image, and uploads it into the distributed storage. Then when we want to boot 1 or 2 or 10 of that app, we just grab the gzipped "slug" and boot it up on an ephemeral LXC containers (i.e. a single base image + temporary overlay file system)
This system can build a rails web app, a node.js app, other services like mysql/redis/nginx, and even the build server itself
So the bootstrapping is a little tricky, but e.g. the process to run a build may go git -> api -> mysql/redis -> worker -> build server -> ceph/s3, and each of those pieces themselves is built/deployed/managed the same way, which we've found to be a huge win for maintainability