How docker deletes the image of the private image library

Docker is an open source application container engine that allows you to quickly build, package and deploy applications. In the application of Docker, images are one of the indispensable components, because they not only provide the basic environment of the application, but also can seamlessly transplant the application in different environments. When using Docker, we usually use a private image library to store our own images. However, as the number of images increases, we need to delete some images that are no longer needed in order to free up space and improve system performance. This article will discuss how to delete images from private image libraries.

Step 1: Log in to the private image library

First, we need to log in to the private image library using an administrator or a user account with delete permissions. We can log in using the following command:

docker login 更新私有镜像库的URL

The above command will prompt you for your username and password. After entering your credentials, you will be granted access to your private vault.

Step 2: List all available images

Before using Docker to delete the image, we need to confirm the image name and image ID we want to delete. We can use the following command to list all available images:

docker images

This command lists all your available images, including details such as name, version, size, creation date, and image ID. After the images are listed, we can select the image we want to delete.

Step 3: Delete the image

To delete the image you don’t need, please use the following command:

docker rmi <镜像名称>:<镜像版本号>

This command requires you to enter the name and version of the image you want to delete. Number. If you want to delete multiple versions of an image, just use the corresponding version number and separate it from the other version numbers with spaces.

If you don’t know the name and version number of the image you want to delete, you can use the following command:

docker images | grep <关键字>

This command will search all images based on the keywords you provide and output the command as Part of the row is returned.

Summary:

When using Docker to manage a private image library, we need to use the x administrator or user account to log in to the private library, list all available images, and use the Docker rmi command to delete any Required image. In addition, before deleting all images, make sure you have backed up all data on the server and confirm the name and version number of the image you want to delete.

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