Administrar mis imágenes de Docker

How to manage Docker images and containers effectively?

Managing images and containers in a Docker environment can be a simple task if you understand the right tools and commands. When creating an image and container, you could accumulate a large number of them over time, which could lead to a management problem. Let's learn how to handle it!

How to use Docker Desktop to manage images?

Docker Desktop is a graphical interface that makes it easy to manage your images and containers. In Docker Desktop, you can quickly see a list of the images you have stored, including their names and versions. Here's how to interact with it and manage your images:

• Viewing images: From Docker Desktop, you can view the images you have, including the Tag that specifies the version of each one.
• Versioning: Using docker build, you can assign custom Tags to your images that allow you to discriminate versions through conventional numbering, such as "2.1.5".

How to manage images from the terminal?

The terminal is a powerful tool to manage your Docker images with greater precision and flexibility. Here some essential commands:

1. List images:

   docker images

   This command will show you a complete list of your current images.

2. Filter images:

   docker images --filter "reference=website:1.0"

   Use the --filter parameter to search for specific images by their reference or tag.

3. Display full image ID:

   docker images --no-trunc

   This will show you the Image ID in its full SHA-256 format.

How to handle image tags?

There are several commands to modify or add tags to your images, which will help you to keep a more organized control:

• Assign a new tag to an existing image:

  docker image tag web_site:current admin/web_site:latest

  This command assigns a new tag to one of your images, updating its reference for better management.

How to delete images safely?

Removing unnecessary images is crucial to maintain a clean and efficient environment. Here's how to do it:

1. Remove image tags:

   docker rmi admin/website_site:latest.

   This will remove the specific tag of the selected image.

2. Remove images based on ID:

   docker rmi <image_id> .

   Before doing this, make sure that no container is using the image, as you will not be able to delete it otherwise.

3. Force image deletion:

   docker rmi -f <image_id>.

   Use -f to force the removal of the image, even if its tags are in use.

It is critical to have all the tools you need to effectively manage your images and containers in Docker. These commands and practices will allow you to keep your environment well organized, avoiding unnecessary clutter and maintaining clarity on the versions and statuses of each image. Keep exploring and improving your Docker skills to optimize your projects!