Override .dockerignore file when using ADD

docker overriding ignore
J Young picture J Young · Jan 31, 2017 · Viewed 7.4k times · Source

I have one Rockerfile that builds 4 images; I also have one central .dockerignore file. For one of the images I require assets that are blocked by the .dockerignore file -- is there a way when doing ADD or COPY to force add / ignore this list?

It'll be a lot easier to do this in one file as opposed to three separate...!

Answer

Lucas dos Santos Abreu picture Lucas dos Santos Abreu · Jan 31, 2017

In a simple way no.

The .dockerignore file is used to filter what will be used in the build before even reading the Dockerfile.

The docker daemon does not see your build folder, when the build starts, all the files in the context build folder are compressed (or just packed) and send to the daemon and only then it will read your Dockerfile to build the container with the files it received.

More content about .dockerignore: https://docs.docker.com/engine/reference/builder/#/dockerignore-file

Related questions

How to get a Docker container's IP address from the host

Is there a command I can run to get the container's IP address right from the host after a new container is created? Basically, once Docker creates the container, I want to roll my own code deployment and container configuration …

Read More
How to copy files from host to Docker container?

I am trying to build a backup and restore solution for the Docker containers that we work with. I have Docker base image that I have created, ubuntu:base, and do not want have to rebuild it each time with …

Read More
How do I get into a Docker container's shell?

I'm getting started working with Docker. I'm using the WordPress base image and docker-compose. I'm trying to ssh into one of the containers to inspect the files/directories that were created during the initial build. I tried to run docker-compose …

Read More