Save Changes in Containers
If you make changes within a container, you can save the container to a new container image for later use. These changes include:
Saving files or data sets inside containers
Installing updates, additional toolboxes, or add-ons to MATLAB® inside the container
You can then deploy the updated version of the container without making the changes again.
To save changes, perform these steps after you make your changes in the container and while the container is still running.
Get Container ID
If you are using a remote Docker® host, on your client machine, open another connection to the Docker host, the machine running the container, using PuTTY or the same method you access the Docker host and launch the container. If you are using a local Docker host, open a new shell.
In the new shell or connection, get the container ID of the running container using this command. This command displays the details of all containers currently running. Identify the container that you want to save and take a note of the container ID.
docker ps -a
For example, suppose you are using MATLAB R2020a in a MATLAB Container. You have updated MATLAB in the container you are running, and you want to save it for later
use. Find the container ID of the running container using the
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3d555451f07a nvcr.io/partners/matlab:r2020a "/bin/run.sh" 24 minutes ago Up 24 minutes 0.0.0.0:5901->5901/tcp, 0.0.0.0:6080->6080/tcp relaxed_pasteur
To save the container to a new container image, use the
docker commit <containerID> <repository>:<tag>
docker commit command locally saves a new container image
based on the specified container ID. In this case, the command saves the container
image based on the currently running container. You can view the images available
locally using the
docker images command.
Commit the container image and save it with the name
mymatlab:r2020a. This command also commits the VNC option.
When you next run the saved container, it defaults to using the VNC mode.
docker commit 3d555451f07a mymatlab:r2020a
To open the same container using different modes next time, use the
docker commit --change 'ENTRYPOINT ["/bin/run.sh"]' 3d555451f07a mymatlab:r2020a
The previous command saves the container on a Linux® operating system. For other operating systems, use the appropriate quotes. For example, for a Microsoft® Windows® operating system, use this command:
docker commit --change "ENTRYPOINT [\"/bin/run.sh\"]" 3d555451f07a mymatlab:r2020a
You can now launch the updated container image by specifying the tag of the
updated container in the
docker run command.