Puppet Docker Rebuild an image with respect to changes in dockerfile

Question

I am building a docker image via a dockerfile that i have specified in the manifest file as shown:

docker::image { 'ubuntu':
  docker_file => '/tmp/Dockerfile'
}

How do i rebuild an image pertaining to changes in the docker file? How can i include this in my manifest?

Answer 1

To rebuild an image, subscribe to external events such as Dockerfile changes by adding the following code to the manifest file:

docker::image { 'ubuntu':
  docker_file => '/tmp/Dockerfile'
  subscribe => File['/tmp/Dockerfile'],
}
file { '/tmp/Dockerfile':
  ensure => file,
  source => 'puppet:///modules/someModule/Dockerfile',
}