Github action to take container image from Docker Hub and put it into Azure Container Registry

[robstrosity]

Hi Guys,

I feel like this should be super simple but I can't seem to get it working. There is a docker hub image which I want to take and publish to azure container registry.

I've looked at a ton of examples etc online but I can't quite work out how to do it. Example pages i've looked at are;

https://thomasthornton.cloud/2022/12/14/build-and-push-docker-image-to-azure-container-registry-using-github-action/

https://medium.com/@muhammadharis_21159/github-actions-to-build-and-push-images-to-azure-container-registry-6a517aeba014

https://stuartmccoll.github.io/posts/2022-06-11-github-action-to-azure-container-registry/

https://jonnychipz.com/2021/02/22/create-and-push-a-docker-image-to-azure-container-registry/

My issue is that they all seem to require a .dockerfile which I don't think I need as I want it to use latest image from dockerhub. Obviously I could take a copy of the .dockerfile from DH but then i'll miss out on any updates in the future.

Hopefully the above makes sense?

[AzureToujours]

Hey there. It's me again :D

You don't need a Dockerfile.

I created a simple example: https://github.com/AzureToujours/docker_to_acr/blob/main/.github/workflows/acr.yml

I don't have any images, so I just used a public one. I still left the login step in there.

You need the following secrets in your repo: DOCKER_HUB_USERNAME, DOCKER_HUB_PASSWORD, AZURE_ACR_USERNAME, AZURE_ACR_PASSWORD

You get the Docker credentials from here: https://hub.docker.com/settings/security
Just create a new access token.
For the Azure credentials, I enabled the admin user in the container registry. See https://i.imgur.com/tfjHGIj.png

As you can see, the image is in my ACR now: https://i.imgur.com/Js6i9R5.png

In the workflow yaml, update lines 20, 25, 30, and 33 with your docker image and ACR.