How to check if I am logged out of Docker Registry?

Checking if You are Logged Out of a Docker Registry

To check if you are logged out of a Docker registry, you can follow these steps:

1. Check the Docker Daemon's Login Status:

   • Open a terminal or command prompt on your system.

   • Run the following command to check the login status of the Docker daemon:

     docker info

   • If you are logged in to a registry, you should see the "Username" field populated with your username. If you are logged out, this field will be empty.

2. Check the Docker Credentials Store:

   • Docker stores your login credentials in a credentials store, which can be located in different places depending on your operating system.

   • You can check the contents of the credentials store by running the following command:

     docker logout

   • If you are logged out, the command will output a message indicating that you have been logged out. If you are still logged in, the command will not output any message.

3. Verify the Docker Configuration File:

   • Docker's configuration file, typically located at ~/.docker/config.json (on Linux and macOS) or %APPDATA%\docker\config.json (on Windows), stores your login credentials and other settings.
   • You can open this file and check if there are any entries for the registry you are interested in. If the file does not contain any entries for the registry, you are logged out.

Here's a Mermaid diagram that summarizes the steps to check if you are logged out of a Docker registry:

By following these steps, you can easily determine if you are logged out of a Docker registry. Remember that being logged out means you will not be able to pull or push images to that registry unless you log in again.