Docker的推荐项目结构

Question

I'm working on a Go project that has the following structure (schematic):

./lib1
./prog1
    ./...
./prog2
    ./...

Where:

• lib1 is a library
• prog1 and prog2 are executables (both depend on lib1)

In a nutshell: How do I create Dockerfiles for prog1 and prog2?

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I tried several approaches, all to no avail:

Creating a Dockerfile in prog1/

Failed because docker cannot ADD ../lib1 to the container since it is out of the context (see http://docs.docker.com/reference/builder/#add).

Creating a Dockerfile in the root directory

Ignoring the fact that I actually need two Dockerfiles (for prog1, and for prog2), I tried placing the Dockerfile in the root directory of the project.

However, the docker image I need to use (golang:1.4.1-onbuild) fails to find any Go files (since they are in ./prog1, and not in the root):

+ exec go install -v
can't load package: package app: no buildable Go source files in /go/src/app

What is the recommended project structure for the golang:1.4.1-onbuild image?

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Edit: Better asked here: https://stackoverflow.com/questions/29209202/dockerizing-gos-hello-world

Answer 1

Most pull the files in via their VCS or just go get instead of using ADD. You add the the source tree in the same way regardless of what tool your building, since you need the structure of $GOPATH to be the same for each.

Note, you can also name your docker file via docker build -f, so if you want to use ADD, you can have multiple DOCKERFILEs in your root directory.