Build Docker Image From Go Code

Question

I\'m trying to build a Docker image using the Docker API and Docker Go libraries (https://github.com/docker/engine-api/). Code example:

package main
import (         


        

Answer 1

@Mangirdas: staring at a screen long enough DOES help - at least in my case. I have been stuck with the same issue for some time now. You were right to use the tar file (your second example). If you look at the API doc here https://docs.docker.com/engine/reference/api/docker_remote_api_v1.24/#/build-image-from-a-dockerfile you can see that it expects a tar. What really helped me was looking at other implementations of the client, perl and ruby in my case. Both create a tar on the fly when being asked to build an image from a directory. Anyway, you only need to put your dockerBuildContext somewhere else (see the cli.ImageBuild())

dockerBuildContext, err := os.Open("/Path/to/your/docker/tarfile.tar")
defer dockerBuildContext.Close()

buildOptions := types.ImageBuildOptions{
    Dockerfile:   "Dockerfile", // optional, is the default
}

buildResponse, err := cli.ImageBuild(context.Background(), dockerBuildContext, buildOptions)
if err != nil {
    log.Fatal(err)
}
defer buildResponse.Body.Close()

I am not there with naming the images properly yet, but at least I can create them... Hope this helps. Cheers