By default, Docker Desktop for Window will create 2 distros below
- docker-desktop
- docker-desktop-data
If we access the path %LOCALAPPDATA%/Docker/wsl; we can see 2 folders; and inside it is vhdx file. For detail,
- data/ext4.vhdx which is consumed by docker-desktop-data
- distro/ext4.vhdx which is consumed by docker-desktop
In which, docker-desktop-data is used to store images and so on. Therefore, its size will be increased in the future, consequently, our System Drive will be out of space. Below are step-by-step to move docker-desktop-data out of System Drive, for example, E:\docker-desktop\data.
Step 1: Stop Docker
Step 2: Export, unregister then import distro
1- Shutdown all WSL distros
wsl --shutdown
2- Export docker-desktop-data to tar file
wsl --export docker-desktop-data E:\docker-desktop\docker-desktop-data.tar
3- Unregister current docker-desktop-data distro
wsl --unregister docker-desktop-data
4- Import docker-desktop-data distro from tar file
wsl --import docker-desktop-data E:\docker-desktop\data E:\docker-desktop\docker-desktop-data.tar --version 2
Notes:
- In this step, we may meet the error of cannot create a specific network. Just re-run the import command.
Step 3: Start Docker
- Introducing the Docker Desktop WSL 2 Backend: we can get more information about docker-desktop, docker-desktop-data and even the new architecture of Docker Desktop
- Moving Docker wsl files
- Where are Docker volumes located when running Windows and WSL?