Puppet Build multiple images using a puppet manifest

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I have to build multiple docker images, should i have multiple dockerfiles for all those images that i want to build using puppet? 

I am using Puppetlabs/image_build module from the puppet forge in order to build docker images. How do I build multiple images using a puppet manifest?

Aug 20, 2019 in Puppet by Kim
827 views

1 answer to this question.

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One advantage of using Puppet for building Docker images is you are removed from the need to have a single Dockerfile per image. 

Meaning a single repository of Puppet code can be used to describe multiple images

This makes ensuring all images use (for example) the same repositories or same hardening scripts much easier to enforce. Change code in one place and rebuild multiple images.

Describing multiple images in Puppet is done using the existing node resource in your manifest. For instance:

node 'node1' {
  webserver { 'hello node 1': }
}
node 'node2' {
  webserver { 'hello node 2': }
}

You can then select which image to build when running the build command, by explicitly passing the image-name.

puppet docker build --image-name puppet/node1

The match for the node resource in the Puppet code is done without the repository name, in this case the puppet/before node1.

Note that you may want different metadata for different images. 

image_build will attempt to detect additional metadata in the metadata folder, and will merge items from metadata/metadata.yaml with node specific metadata, for instance from metadata/node1.yaml

answered Aug 20, 2019 by Sirajul
• 59,230 points

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