How to Fix the \'\'import path does not begin with hostname\'\' Error in Docker Build with Local Packages?

Fixing 'import path does not begin with hostname' Error in Docker Build with Local Package

When attempting to build a Docker container incorporating a local package, you may encounter the error "'import path does not begin with hostname,'" indicating that the import path for your dependencies is not recognized.

As suggested in the article "Deploying Go servers with Docker," the following Dockerfile should suffice:

FROM golang:onbuild
EXPOSE 8080

However, to address this issue, it's essential to consider that an application built within a Docker container requires its dependencies to be available during the build process. While "golang:onbuild" simplifies Dockerfiles for basic cases, it doesn't fetch dependencies.

To resolve this issue, you can create a customized Dockerfile outlining the steps required to build your application. Depending on your project's structure, a Dockerfile like this could serve your purpose:

FROM golang:1.6
ADD . /go/src/yourapplication
RUN go get github.com/jadekler/git-go-websiteskeleton
RUN go install yourapplication
ENTRYPOINT /go/bin/yourapplication
EXPOSE 8080

This Dockerfile adds both your source code and its dependency into the container, builds your application, launches it, and exposes it on port 8080. By following this approach, you can effectively build Docker containers with local packages.

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