如何解决Docker推送报错‘标签不存在’？咨询命令行创建标签方法

Let’s walk through exactly what’s going wrong and how to fix it using only the command line—no need to manually create tags via the web interface anymore.

The Root of the Problem #

Your initial command has two key issues:

1. The -t flag isn’t valid for docker push—that flag is meant for assigning tags during docker build or when tagging existing images with docker tag, not for pushing.
2. You’re trying to push a tag that doesn’t exist locally (and hasn’t been linked to your remote repository), which triggers the "tag name does not exist" error.

Step-by-Step Solution #

Here’s the correct workflow to tag your image and push it, which will automatically create the tag in your remote repo without any web interface steps:

1. List your local images to get the name or ID of the image you want to push:

   docker images
   

   You’ll see output like this (note the REPOSITORY/TAG columns, or use the IMAGE ID):

   REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
   my-app       latest    abc123def456   2 hours ago    250MB
   

2. Tag your local image with the remote repository path—this links your local image to the remote repo’s tag structure:

   docker tag <local-image-name-or-id> domain.com/repo/tag_docker_name:latest
   

   For example, using the image ID from the sample output:

   docker tag abc123def456 domain.com/repo/tag_docker_name:latest
   

   This creates a local tag that matches the exact path your remote repository expects.

3. Push the tagged image to your remote repository:

   docker push domain.com/repo/tag_docker_name:latest
   

   This command will send the image to your repo and automatically create the latest tag there—no manual setup required.

Bonus: Don’t Skip Authentication! #

If you haven’t already, make sure you’re logged into your remote repository first:

docker login domain.com

Enter your username and password when prompted to authenticate.

Why This Works #

When you use docker tag, you’re creating a pointer from your local image to the remote repository’s tag path. When you push that tagged image, Docker communicates with the remote repo and creates the tag automatically if it doesn’t exist yet. Your original error came from skipping the tagging step and trying to push a tag that wasn’t linked to any local image.

内容的提问来源于stack exchange，提问作者tensor