When using a Docker Registry, like hub.docker.com, you will not often want to delete a published version of an image. You cannot know if someone, somewhere in the world is using that specific version. But when using a repository as part of your CI/CD pipeline, you might have lots of versions that are not used by anyone anymore. So, what if you want to clean the repository automatically? In this article, I will show how the delete images by tag, using PowerShell and the Docker Registry HTTP API V2.

Using Docker images for your Azure web app is not brand-new functionality. But if you want to deploy your container-based web app using ARM templates and use your own Azure container registry, you might discover it's not as straightforward as you might think. In this article we will walk through the steps how we can make a connection to the container registry. In the end we will also make sure we do not have to pass along the password during the deployment.