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A JupyterLab extension.

Project description


CircleCI PyPI version

A JupyterLab extension for integrations with Pachyderm.

This extension is composed of a Python package named jupyterlab_pachyderm for the server extension and a NPM package named jupyterlab-pachyderm for the frontend extension.


  • JupyterLab >= 3.0

  • Python >=3.7,<4

    • pyenv is a great way to manage and install different versions of python. You can check which version you are using by running pyenv versions. Our Python extension is built to be compatible with Python versions 3.7 to 3.10. Therefore, it is best to run the lowest version (3.7.x) for highest compatibility.
  • Node

    • If you are using nvm first run nvm install. This will install and switch the version of node to the one defined in the .nvmrc. If you are upgrading the version of node used in the project, please check and make sure that the versions defined in the .nvmrc.

Development Environment

There are two ways you can work on this project. One is setting up a local python virtual environment and the other is using a docker image developing on a virtual machine.

Dev Container Workflow

Building and running the extension in a Docker container allows us to use mount, which is not possible in recent versions of macOS.

Assuming that you are running a Pachyderm instance somewhere, and that you can port-forward pachd

kubectl port-forward service/pachd 30650:30650

Start a bash session in the pachyderm/notebooks-user container from the top-level jupyterlab-pachyderm repo.

docker run --name jupyterlab_pachyderm_frontend_dev \
  -p 8888:8888 \
  -it -e GRANT_SUDO=yes --user root \
  --device /dev/fuse --privileged \
  -v $(pwd):/home/jovyan/extension-wd \
  -w /home/jovyan/extension-wd \
  pachyderm/notebooks-user:<latest master SHA> \

If you are running the frontend container on Linux, and want to be able to talk to pachd in minikube on grpc://localhost:30650, use --net=host at the start of the the docker run command as shown above. If you are on macOS, you will want to remove --net=host as it is not supported. On macOS you can specify grpc://host.docker.internal:30650 to get the same effect.

Install the project in editable mode, and start JupyterLab

pip install -e .
jupyter labextension develop --overwrite

# Server extension must be manually installed in develop mode, for example
jupyter server extension enable jupyterlab_pachyderm

jupyter lab --allow-root

Open another bash inside the same container:

docker exec -it <container-id> bash

Within container run:

npm run watch

Note: Once run above, you can start the dev container again in future sessions using

docker start <container id>

and then running

docker exec -it <container id> bash

Iterating on the mount server, from inside a pachyderm checkout:

CGO_ENABLED=0 make install
docker cp /home/luke/gocode/bin/pachctl jupyterlab_pachyderm_frontend_dev:/usr/local/bin/pachctl
docker exec -ti jupyterlab_pachyderm_frontend_dev pkill -f pachctl

Local Virtual Environment Setup

When developing in python, it is good practice to set up a virtual environment. A simple guid to set up a virtual environment is as follows: create a virtual environment using venv

python -m venv venv

Activate the environment

source venv/bin/activate

When you are done using the environment you can close your shell or deactivate the environment: deactivate

Development install

Note: You will need NodeJS to build the extension package.

# Clone the repo to your local environment
# Change directory to the jupyterlab-pachyderm directory (top level of repo)
# Make sure you are using a virtual environment
# Install package in development mode
pip install -e .
# Link your development version of the extension with JupyterLab
jupyter labextension develop . --overwrite
# Server extension must be manually installed in develop mode
jupyter server extension enable jupyterlab_pachyderm
# Rebuild extension Typescript source after making changes
npm run build

You can watch the source directory and run JupyterLab at the same time in different terminals to watch for changes in the extension's source and automatically rebuild the extension.

# Watch the source directory in one terminal, automatically rebuilding when needed
npm run watch
# Run JupyterLab in another terminal
jupyter lab --allow-root

With the watch command running, every saved change will immediately be built locally and available in your running JupyterLab. Refresh JupyterLab to load the change in your browser (you may need to wait several seconds for the extension to be rebuilt).

By default, the npm run build command generates the source maps for this extension to make it easier to debug using the browser dev tools. To also generate source maps for the JupyterLab core extensions, you can run the following command:

jupyter lab build --minimize=False

Development uninstall

# Server extension must be manually disabled in develop mode
jupyter server extension disable jupyterlab_pachyderm
pip uninstall jupyterlab_pachyderm

In development mode, you will also need to remove the symlink created by jupyter labextension develop command. To find its location, you can run jupyter labextension list to figure out where the labextensions folder is located. Then you can remove the symlink named jupyterlab-pachyderm within that folder.

Locally building the docker image

Useful if iterating on the Dockerfile locally or iterating on changes to a version of mount-server.

Create & activate venv:

python3 -m venv venv
source venv/bin/activate

Build dist directory:

python -m pip install --upgrade pip
python -m pip install -r ci-requirements.txt
python -m build

Build docker image:

export PACHCTL_VERSION=aaa7434c714fab6130c3982ebdaa8f279bd850c2 # or whichever version you want
docker build --build-arg PACHCTL_VERSION=$PACHCTL_VERSION -t pachyderm/notebooks-user:dev .
docker run -ti -p 8888:8888 pachyderm/notebooks-user:dev

Navigate to the URL that's printed out by the docker container, then change tree to lab in your browser's address bar.


To install the extension, execute:

pip install jupyterlab_pachyderm


To remove the extension, execute:

pip uninstall jupyterlab_pachyderm

Server extension

First make sure the server extension is enabled:

jupyter server extension list 2>&1 | grep -ie "jupyterlab_pachyderm.*OK"

Install Jupyterhub locally (Sidecar mode testing)

helm repo add jupyterhub
helm repo update
helm install jhub jupyterhub/jupyterhub --version 2.0.0 --values scripts/jhub-dev-helm-values.yml

Note: Use any username and no password to login

API endpoints

GET /repos # returns a list of all repos/branches
GET /mounts # returns a list of all active mounts and unmounted repos/branches
PUT /_mount # mounts a single repo
PUT /_unmount # unmounts a single repo
PUT /_commit # commits any changes to the repo
PUT /_unmount_all # unmounts all repos
PUT /_mount_datums # mounts first datum of given input spec
PUT /_show_datum # cycles through mounted datums

The servers-side extension extends jupyter server, so it automatically starts as part of jupyter lab.

API endpoints can be accessed via localhost:8888/pachyderm/v2

The frontend can access the endpoints via /v2, for example:

      .then(data => {
      .catch(reason => {

You can also access it via localhost:8888/v2

SVG Images

We are leveraging svgr to simplify the use of non icon svgs in in the project. Svg images that are to be converted live in the svg-images folder and get output to the src/utils/components/Svgs folder. If you want to add a new image to the project simply add the svg to the svg-images folder and run npm run build:svg. We have spent some time trying to get svgr to work through the @svgr/webpack plugin but have not been successful as of yet.

Project Structure

Jupyter extensions are composed of several plugins. These plugins can be selectively enabled or disabled. Because of this we have decided separate the functionality in the extension using plugins. Plugins exported in this extension are as follows.


This plugin contains custom styling and other features only used by hub. By default this extension is disabled.


This plugin contains the mount feature currently under development.

Plugin settings

You can disable certain plugins by specifying the following config data in the <jupyter_config_path>/labconfig/page_config.json:

  "disabledExtensions": {
    "jupyterlab-pachyderm:examples": true

You can check your config paths by running jupyter --paths. Setting this config file is not part of the built extension and needs to be done by the user.

Adding the following to the package.json in the jupyterlab object will disable the examples plugin by default.

"disabledExtensions": ["jupyterlab-pachyderm:examples"]

So we can build the extension with hub features turned off and override the setting for hub.


If you are seeing the frontend extension, but it is not working, check that the server extension is enabled:

jupyter server extension list

If the server extension is installed and enabled, but you are not seeing the frontend extension, check the frontend extension is installed:

jupyter labextension list

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