jm + ops + copy-on-write   1

Next Generation Continuous Integration & Deployment with dotCloud’s Docker and Strider
Since Docker treats it’s images as a tree of derivations from a source image, you have the ability to store an image at each stage of a build. This means we can provide full binary images of the environment in which the tests failed. This allows you to run locally bit-for-bit the same container as the CI server ran. Due to the magic of Docker and AUFS Copy-On-Write filesystems, we can store this cheaply.

Often tests pass when built in a CI environment, but when built in another (e.g. production) environment break due to subtle differences. Docker makes it trivial to take exactly the binary environment in which the tests pass, and ship that to production to run it.
docker  strider  continuous-integration  continuous-deployment  deployment  devops  ops  dotcloud  lxc  virtualisation  copy-on-write  images 
july 2013 by jm

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