Build & Push to custom registry

In this guide, we will look at how to push an image to a selfhosted docker registry

Requirements:

  • a selfhosted docker registry, example: (cfr-r.divsphere.net)
  • docker
  • custom project with a dockerfile that you want to build and push
Quickstart

Building a project

To build your project, you’ll need to run the following command:

Docker Build Command

sudo docker build -t cfr-r.divsphere.net/myapp:latest -f Dockerfile .

-t: specifies the tag of the image you need to put it in this format [location]/[yourapp]:[version] (the location needs to be added here because otherwise it'll try to push to the dockerhub) -f: specifies the location of the dockerfile the . at the end specifies the context it’ll will run in.

Pushing a project

Next you can push it to the registry like this:

Docker Push Command

sudo docker push cfr-r.divsphere.net/myapp:latest

After the push you'll need to specify the image that you want to push. For windows you dont have to add the sudo