docker unauthorized: authentication required - upon push with successful login 0 votes While pushing the docker image (after successful login) from my host I am getting "unauthorized: authentication required". We’ll do that, but is there any reason you’re blocking repos with single character names? This is an excellent article unlike anything I found on the web for enabling TLS for a private docker registry, especially the root CA part and making the docker client trust the server cert. unauthorized: authentication required. Complete Solution 1 first. When trying to push an image to DTR even after successfully logging in, I get: unauthorized: authentication required Resolution. A proxy is required when the server running Docker does not have direct access to the Internet. These images are provided by Docker Hub, a centralized public registry that contains many official and unofficial images of almost every software in the world.However, there are situations, when we required to configure our on-premises Private Docker Registry to create and share custom docker images amongst our organizational units. Docker creates containers from images. Super late response but for anyone having trouble with this: Don’t actually docker login to just registry.gitlab.com, you need your full container registry url.Also using sudo might help if your on linux and get permission denied. Overview. Hi all, I implemented the following setup for gitlab-ci, in my gitlab community environment I am using version: 8.12.0 I have a “build” stage in which I build a docker image and pushes it to gitlab registry and I have a “test” stage after the build stage in which I pull the image (I built in previous stage) and test it. Solutions. It is possible that the way … There are 2 ways to configure the proxy for docker : Configuring proxy variables in the /etc/sysconfig/docker file Thanks @kizbitz - that helps a lot!. unauthorized: authentication required (Are you logged in to the docker registry? If it fails, you must complete Solution 2. Configure the Docker daemon to use a proxy server to access images stored on the official Docker Hub Registry or 3rd-party registries. If Solution 1 succeeds, you do not need to complete Solution 2. We really like having kaggle/r, because the language R is just one character and fits nicely with the naming conventions we have with kaggle/python and kaggle/julia. One of the things that makes Docker so useful is how easy it is to pull ready-to-use images from a central location, Docker’s Central Registry.It is just as easy to push your own image (or collection of tagged images as a repository) to the same public registry so that everyone can benefit from your newly Dockerized service.. Solution 1. Log in to Docker again by issuing the following command: