Add the jupyterhub-configurator service

.github/workflows/unit-test.yaml

@@ -12,9 +12,9 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.6
-      - name: Install and setup venv
+      - name: Install venv, git and setup venv
         run: |
-          apt-get update --yes && apt-get install --yes python3-venv
+          apt-get update --yes && apt-get install --yes python3-venv git
           python3 -m venv /srv/venv
           echo '/srv/venv/bin' >> $GITHUB_PATH
       - name: Cache pip deps

docs/topic/index.rst

@@ -17,3 +17,4 @@ Topic guides provide in-depth explanations of specific topics.
    authenticator-configuration
    escape-hatch
    idle-culler
+   jupyterhub-configurator

docs/topic/jupyterhub-configurator.rst

@@ -0,0 +1,28 @@
+.. _topic/jupyterhub-configurator:
+
+=======================
+JupyterHub Configurator
+=======================
+
+The `JupyterHub configurator <https://github.com/yuvipanda/jupyterhub-configurator>`_ allows admins to change a subset of hub settings via a GUI.
+
+.. image:: ../images/jupyterhub-configurator.png
+  :alt: Changing the default JupyterHub interface
+
+Enabling the configurator
+=========================
+
+Because the configurator is under continue development and it might change over time, it is disabled by default in TLJH.
+If you want to experiment with it, it can be enabled using ``tljh-config``:
+
+.. code-block:: bash
+
+    sudo tljh-config set services.configurator.enabled True
+    sudo tljh-config reload
+
+Accessing the Configurator
+==========================
+
+After enabling the configurator using ``tljh-config``, the service will only be available to hub admins, from within the control panel.
+The configurator can be accessed from under ``Services`` in the top navigation bar. It will ask to authenticate, so it knows the user is an admin.
+Once done, the configurator interface will be available.

integration-tests/plugins/simplest/setup.py

@@ -5,5 +5,3 @@
     entry_points={"tljh": ["simplest = tljh_simplest"]},
     py_modules=["tljh_simplest"],
 )
-
-

setup.py

@@ -18,11 +18,11 @@
         'backoff',
         'requests',
         'bcrypt',
-        'jupyterhub-traefik-proxy==0.2.*'
+        'jupyterhub-traefik-proxy==0.2.*',
     ],
     entry_points={
         'console_scripts': [
             'tljh-config = tljh.config:main',
-        ],
+        ]
     },
 )

tljh/configurer.py

@@ -66,6 +66,9 @@
             'concurrency': 5,
             'users': False,
             'max_age': 0
+        },
+        'configurator': {
+            'enabled': False
         }
     }
 }
@@ -175,8 +178,8 @@ def update_userlists(c, config):
     """
     users = config['users']
 
-    c.Authenticator.whitelist = set(users['allowed'])
-    c.Authenticator.blacklist = set(users['banned'])
+    c.Authenticator.allowed_users = set(users['allowed'])
+    c.Authenticator.blocked_users = set(users['banned'])
     c.Authenticator.admin_users = set(users['admin'])
 
 
@@ -249,10 +252,31 @@ def set_cull_idle_service(config):
     return cull_service
 
 
+def set_configurator(config):
+    """
+    Set the JupyterHub Configurator service
+    """
+    HERE = os.path.abspath(os.path.dirname(__file__))
+    configurator_cmd = [
+        sys.executable, "-m", "jupyterhub_configurator.app",
+        f"--Configurator.config_file={HERE}/jupyterhub_configurator_config.py"
+    ]
+    configurator_service = {
+        'name': 'configurator',
+        'url': 'http://127.0.0.1:10101',
+        'command': configurator_cmd,
+    }
+
+    return configurator_service
+
+
 def update_services(c, config):
     c.JupyterHub.services = []
+
     if config['services']['cull']['enabled']:
         c.JupyterHub.services.append(set_cull_idle_service(config))
+    if config['services']['configurator']['enabled']:
+        c.JupyterHub.services.append(set_configurator(config))
 
 
 def _merge_dictionaries(a, b, path=None, update=True):

tljh/installer.py

@@ -141,6 +141,7 @@ def ensure_jupyterhub_package(prefix):
             "oauthenticator==0.10.0",
             "jupyterhub-idle-culler==1.0",
             "chardet==3.0.4",
+            "git+https://github.com/yuvipanda/jupyterhub-configurator@317759e17c8e48de1b1352b836dac2a230536dba"
         ],
     )
     traefik.ensure_traefik_binary(prefix)

tljh/user_creating_spawner.py

@@ -1,9 +1,11 @@
 from tljh.normalize import generate_system_username
 from tljh import user
+from tljh import configurer
 from systemdspawner import SystemdSpawner
 from traitlets import Dict, Unicode, List
+from jupyterhub_configurator.mixins import ConfiguratorSpawnerMixin
 
-class UserCreatingSpawner(SystemdSpawner):
+class CustomSpawner(SystemdSpawner):
     """
     SystemdSpawner with user creation on spawn.
 
@@ -32,3 +34,12 @@ def start(self):
                     user.ensure_user_group(system_username, group)
         return super().start()
 
+cfg = configurer.load_config()
+# Use the jupyterhub-configurator mixin only if configurator is enabled
+# otherwise, any bugs in the configurator backend will stop new user spawns!
+if cfg['services']['configurator']['enabled']:
+    # Dynamically create the Spawner class using `type`(https://docs.python.org/3/library/functions.html?#type),
+    # based on whether or not it should inherit from ConfiguratorSpawnerMixin
+    UserCreatingSpawner = type('UserCreatingSpawner', (ConfiguratorSpawnerMixin, CustomSpawner), {})
+else:
+    UserCreatingSpawner = type('UserCreatingSpawner', (CustomSpawner,), {})