export-docker

Export a Docker container to a lxc container

How to use

sudo ./export-container.py <container id> <new container name>

Example:

$ sudo ./export-container.py f4e7e632964a registry
Exporting Docker container to a lxc container
Docker container id:  f4e7e632964a
New container name:  registry
Full container id  f4e7e632964a822bbd0e633b8ef8422c341d0b43d3e72a869c1154e461cf2302
Container exists [/var/lib/docker/containers/f4e7e632964a822bbd0e633b8ef8422c341d0b43d3e72a869c1154e461cf2302]? True
Rootfs exists [/var/lib/docker/devicemapper/mnt/f4e7e632964a822bbd0e633b8ef8422c341d0b43d3e72a869c1154e461cf2302/rootfs]? True
Init-rootfs exists [/var/lib/docker/devicemapper/mnt/f4e7e632964a822bbd0e633b8ef8422c341d0b43d3e72a869c1154e461cf2302-init/rootfs]? True
Copying rootfs...
Copying config files...
Creating run script...

It's all done! Now just type:
cd registry && sudo ./run.sh

Check the folder just created:

$ find registry/ -maxdepth 2
registry/
registry/rootfs
registry/rootfs/usr
registry/rootfs/home
...
registry/rootfs/tmp
registry/rootfs/root
registry/config.lxc.template
registry/run.sh

• config.lxc.template: The lxc config file
• run.sh: Script to run the container
• rootfs/: Folder with all container files

To run:

$ sudo ./run.sh
root@f4e7e632964a:/#

Why

• To have a lxc container independent from Docker (docker0 network interface is the only dependency)
• To learn about lxc and Docker
• For fun :)