Read the article to know the method to convert a Docker image to a format used by LXD systems. Bobcares, as a part of our Docker Hosting Support Services, offers solutions to every query that comes our way.

How to convert a Docker image to LXD format?

Taking a Docker image, which is used to run containers in the Docker ecosystem, and converting it to a format that the Linux Containers (LXD) system can use is referred to as “converting a Docker image to LXD.” Since the Docker and LXD ecosystems use various image formats and operate containers in various ways, conversion is required. We may benefit from the complex container management and orchestration features offered by LXD through this conversion.

The ability to run containers in a more isolated environment, where the host and container share the same kernel but have separate user spaces, is one benefit of adopting LXD. When opposed to Docker, where containers share the same resources, this offers better security and resource separation. Additionally, LXD provides advanced container management tools like live migration, snapshots, and cloning that make it simpler to deploy and manage containers in expansive production settings.

An image will undergo a format change in order to be converted, which may have an impact on the image’s compatibility and operation with the LXD system. It is advised to verify the image’s compatibility with the LXD system and make any necessary adjustments to ensure correct functionality before converting it.

Steps to convert Docker image to LXD format

1. Get the Docker image from a registry using the below code:

docker pull <image_name>:<image_tag>

2. Also save the Docker image as a tar archive:

docker save -o <image_name>.tar <image_name>:<image_tag>

3. Move the tar archive to the host system where LXD is set up.

4. Then, use the below command to import the tar archive into LXD:

lxc image import <image_name>.tar --alias <image_alias>

5. Next, list the available images to ensure the image was successfully imported:

lxc image list

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Conclusion

To conclude, the article explains the steps to convert a Docker image to a format used by the LXD (Linux container) systems.