/why-docker

🐳 Markdown slides about why docker is cool

why should you care about docker?

lots of smaller services

  • bigger operational overhead
  • trickier to run locally

what problems?

(and potential solutions without docker)

it works on my machine

  • you can just get a developer VM
  • needs beefy dev machines
  • slow startup and big VM images

configuration managament

  • Puppet/Chef/etc has to ensure state is correct
  • every single time!

packaging

  • just build a deb/rpm package - fpm
  • you know what f stands for, right?

docker

docker vs VMs

docker images

  • union filesystem and caching
  • immutable (shareable!) layers
  • base images FTW

docker registry

  • docker images to deploy code instead of packages