Building docker images from a source directory using different dockerfiles

Question

My goal is to build several different docker images , from the same source code.

i have my ./src folder (node.js project). inside ./src i have first.dockerfile and second dockerfile.

for building the the project i use this standard command line

sudo docker build -t doronaviugy/myproject . 

This works with no problems using the default Dockerfile

I'm trying to build it from a specific dockerfile using the line

sudo docker build -t doronaviguy/myproject  - <   first.docker 

this line works, but now path doesn't being copy inside the image

#Inside the Dockerfile ADD . /src 

I think i understand how to specify a dockerfile argument, but i need to specify a direcotry argument to be copied inside the docker image.

Thanks a lot.

Answer 1

Since Docker 1.5, you can use the -f argument to select the Dockerfile to use e.g:

docker build -t doronaviugy/myproject -f dockerfiles/first.docker .

If you use stdin to build your image ( the - < first.docker syntax), you won't have a build context so you will be unable to use COPY or ADD instructions that refer to local files.

If you have to use an older version of Docker, you'll need to use some scripting to copy your specific Dockerfiles to Dockerfile at the root of the build context before calling docker build.