Run Docker inside a container running in Azure Container Instance?

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Run Docker inside a container running in Azure Container Instance?

admanb-vw 21

I have a worker service that will be running in a container deployed to an Azure Container Instance that needs to run a series of Docker commands to manage incoming and outgoing containers -- specifically an import to a local registry, then push to a remote registry, or a pull from remote then push to remote and I'm wondering how to get that done. Docker-in-Docker in an ACI specifically doesn't seem possible: [43947][1, but it seems like Podman-in-Docker might due to lower requirements? This doesn't seem like an uncommon usecase, so it seems like someone would've figured out how to do it in an ACI.

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Answer 1

Hello @admanb-vw

You are right Azure Container Instances does not expose direct access to the underlying infrastructure that hosts container groups. This includes access to the Docker API running on the container's host and running privileged containers.

You can try to use podman inside Docker container and run it in Azure WebApp, ACI or Container App but you can get an issue ACR login does not work with podman

I would recommend you to use Azure ACR tasks inside Docker

https://learn.microsoft.com/en-us/azure/container-instances/container-instances-troubleshooting#cannot-connect-to-underlying-docker-api-or-run-privileged-containers

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Run Docker inside a container running in Azure Container Instance?

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