What happens if docker push cannot be found?

With the popularity of containerization technology, Docker has become the tool of choice for many companies to build and deploy applications. Docker Hub is a widely used Docker Registry where developers can upload their own Docker images for use by others. However, sometimes we find that the image we uploaded cannot be found on Docker Hub. Why is this?

Possibility 1: The Docker Hub search engine has not indexed your image

After you upload the image, it will take some time for the Docker Hub search engine to index your image. This may take several hours, or even a day. If you look for your image on Docker Hub and get zero results, you need to be patient and wait for search engines to index your image.

Possibility 2: Your image name is not unique

There are thousands of images on Docker Hub, and it is possible that others have uploaded images with the same name. If the image name you use is already used by another user, you will not be able to find your image on Docker Hub.

Recommended way: To avoid this, you can use a unique name. Set your name to a namespace that has a specific namespace, for example you can prefix your image name with your own username. This will ensure that your image has a unique name, making it easier to find and identify.

Possibility three: Your image is being reviewed or there are violations

When you upload the image to Docker Hub, it will automatically enter the review process. If your image has potential violations, it may be temporarily banned from uploading. If the image you upload contains illegal content, the Docker Hub administrator may suspend the image's upload permission until you resolve the issue.

Suggested method: If your image is not searched on Docker Hub, please check whether your image complies with Docker Hub's terms and conditions. You can check Docker Hub's usage policy to make sure your image complies.

Possibility four: Your image has been deleted on Docker Hub

If you decide to delete the image after uploading it, it will no longer be displayed on Docker Hub. Deleted images cannot be found unless you re-upload them.

Possibility five: There is no uploaded image locally

If your image was created locally rather than pulled from Docker Hub, you need to use the Docker command to push it to Your personal or organizational repository on Docker Hub. Otherwise, you won't be able to find your image on Docker Hub.

Recommended method: Use the following command to push the local image to Docker Hub

docker login
docker tag IMAGE REGISTRYHOST/NAME[:TAG]
docker push REGISTRYHOST/NAME[: TAG]

In short, if your image cannot be found on Docker Hub, please check whether your image has been successfully uploaded and use a unique name to ensure that it meets the conditions of Docker Hub.

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