Скачать или смотреть How to Move Your Docker Containers and Images to Another Computer Easily

Learn how to save and transfer your Docker containers and images effortlessly, ensuring a smooth workflow across different machines!
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This video is based on the question https://stackoverflow.com/q/65951412/ asked by the user 'ben-ju' ( https://stackoverflow.com/u/14089257/ ) and on the answer https://stackoverflow.com/a/65951772/ provided by the user 'Syed Mohammad Fahim Abrar' ( https://stackoverflow.com/u/7584160/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Have You Ever Encountered an Empty Docker Containers List?

When you start your journey with Docker, it's common to run into little issues along the way. One common scenario is when you encounter an empty output while checking for your running containers using the docker ps -a command, even though your application continues to work perfectly on localhost. This can be puzzling for new users and leads to the important question:

How Can You Find Your Docker Containers and Transfer Them to Another Computer?

In this guide, we’ll explore a straightforward solution that will help you manage your Docker containers and make it easy to move between different machines.

Understanding Your Docker Setup

Before diving into the solution, let’s quickly recap the setup you've created:

Services Defined in docker-compose.yml:

You're running a MySQL database.

You've set up phpMyAdmin for database management.

You have configured an Apache server to host your PrestaShop project.

Docker Images Status:

Your images appear to be correctly built and exist in your local repository.

Networking:

You've created a dedicated network for your containers to communicate.

Despite everything appearing fine, the docker ps -a command returns an empty list, which means that Docker is not recognizing your active containers.

Solution: Push Your Images to Docker Hub

The easiest solution to retain your work and transfer it to another computer is to push your Docker images to Docker Hub. Here’s how to do it step-by-step:

Step 1: Update Your docker-compose.yml

Make sure to specify your Docker Hub username in the image field of your docker-compose.yml file. Here’s an updated snippet for your Apache service:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Log In to Docker Hub

Open your terminal.

Navigate to the directory where your docker-compose.yml is located.

Enter the following command to log in:

[[See Video to Reveal this Text or Code Snippet]]

Provide your Docker Hub credentials when prompted.

Step 3: Build Your Images

Run this command to build your images based on the updates you made:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Push Images to Docker Hub

Once the build process completes, push your images to Docker Hub using the command:

[[See Video to Reveal this Text or Code Snippet]]

Step 5: Transfer to Another Computer

On the target machine, open your terminal.

Copy your updated docker-compose.yml file to this computer.

Run the following command to start your services:

[[See Video to Reveal this Text or Code Snippet]]

This will automatically pull the images from Docker Hub and start your project as it was on your previous machine.

Conclusion

By following these steps, you can ensure that your Docker containers and images are safely transferred between computers. This not only prevents the hassle of losing your work but also streamlines your development process with Docker.

Remember, keeping your Docker environment organized and utilizing Docker Hub effectively can save you a lot of time and confusion in the long run. Happy Dockering!