that is -t for tag, (not -n for name).ī) When you want to push that image to a registry, you need to have the full URL (starting with registryname and ending with a tag-suffix) as a tag:ĭocker tag thisname mylocalregistry:5000/username/repoimagething:1.0 Sorry.)Ī) When you want to name your image while building, you use docker build -t thisname. (I say imagename here, just to illustrate the other main source of confusion. All these are tags (possibly referring to the same image): In reality, the :latest' suffix is technically part of the tag. When somebody says "'latest' is the default tag", then this kind of tag-suffix is meant.
I'd rather call that alphanumeric identifier that you append with a ':' a tag-suffix for now. The confusion starts with this definition of a tag: "An alphanumeric identifier attached to images in a repository" Latest: digest: sha256:eb93c92351bce785aa3ec0de489cfeeaafd55b7d90adf95ecea02629b376e577 size: if you type immediately docker images -digests -a you can confirm that your pushed image tags are now showing new signature against the private repository managed by docker hub registry. An example output when you pushing your image tags are the following: docker push mydockerhub/my-helloworld-repo:my_tag So without any modification, your images will be pushed to your private repository in docker hub. By default you will get a docker hub registry (Open Source) which you can use to keep your private/public repository. Now, your question is, "So where is this repository hosted/who is managing the service"? That is where Docker Registry comes into picture. As long as the repository names match, they will be pushed successfully, and appear under your chosen repository and correctly tagged. You can use docker push command to push each of the above images to your repository. An example is that you might have tagged 5 of ubuntu:latest images: For Java Developers, this is somewhat analogous to Maven Artifactory setup.ĭocker Repository is a set of "Tagged" images.
Registry collection software#
Usually, if your software is commercial, you will have hosted this as a "Private and Trusted" registry. Docker Registry is a service, which you can either host yourself (Trusted and Private) or you can let docker hub be the host for this service.
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