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Docker Image Validation

Do you publish container images to Docker Hub but have no idea how to test them upfront? Then read on and get to know how you can use goss, docker-compose and Docker Hub to automatically test your images before releasing them.

Goss

So Goss is a tool to validate server configurations. You define your assumption in a yaml-style spec file and validate against them.

goss.yaml

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Parameters

Overview

Name	Mandatory	Default
addClosedIssues	No	false
addDeltaToLastRelease	No	false
apiUrl	Yes	https://api.github.com
assetPath	No	-

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To create a valid .docker/config.json file you first need to base64 encode your username and password:

echo <username>:<password> | base64

The output will look like this:

~ echo hallo:welt | base64