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"Dockerfiles Considered Harmful"

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"Dockerfiles Considered Harmful"

Why Dockerfiles should be avoided, especially in testing, for the good of your operations team.

· DevOps Zone ·
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DevOps involves integrating development, testing, deployment and release cycles into a collaborative process. Learn more about the 4 steps to an effective DevSecOps infrastructure.

I found an interesting piece on the Wercker blog from Andy Smith, called "Dockerfiles Considered Harmful." I've been trying to learn more about Docker lately, and I thought this would be an interesting read for you all.

One interesting point I learned about Dockerfiles is that Dockerfiles was created at a time where there weren't many tools designed to work with Docker, but there are still plenty of people testing their code in Dockerfiles. This is a bad idea. 

Instead, Andy suggests using a Bash script instead, which would be more predictable and useful to most developers. 

Andy also goes more in-depth about layers, the registry, and several alternatives to using Dockerfiles, including avoiding registry use, using only one layer, restructuring your deployment lifecycle, and using tools designed for build/test/deploy.

You can read the article in full here. What do you think about it?

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Topics:
devops ,docker ,testing

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