Run docker command in Heroku

Question

I have an image that I need to start with special run arguments, i.e: docker run --cap-add=SYS_ADMIN.

How can I achieve this with Heroku?

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Here's what I've tried -

In my package.json I have

"start": "docker run --cap-add=SYS_ADMIN..."

In Dockerfile I have

RUN npm start

But when I start the dyno and run heroku logs --tail I get

docker is not a command

question from:https://stackoverflow.com/questions/65909381/run-docker-command-in-heroku

Answer 1

It is not possible as containers cannot be run with root privileges on Heroku, see Heroku Registry Documentation.
It is safer/better to work locally with non-root user ensuring the same container can run on Heroku.