Tasks

A Dockerfile to write or to fix, and a service that has to keep working. Graded on the manifest, on which instructions rebuilt, on what the image weighs, on what is still inside it, and on what the process did when it was asked to stop.

• What an image is

  • Build it twice, get the same imagewarm-up4 min

• The cache

  • Make a commit cheapwarm-up5 min
  • A version argument that costs nothinghard9 min

• Size

  • A secret that is not in the imageroutine8 min
  • Forty megabytes of package listsroutine6 min

• PID 1 and signals

  • A container that stops when it is askedwarm-up5 min
  • The zombies nobody noticedroutine7 min

• Isolation

  • Stop running as rootwarm-up4 min

• Limits

  • Exit 137 and no stack tracehard10 min