First complete version

obijupyterhub/jupyterhub_config.py

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+import os
+import logging
+from pathlib import Path
+
+
+# Base configuration coucou
+c.JupyterHub.spawner_class = 'dockerspawner.DockerSpawner'
+
+# Enable debug logs
+c.JupyterHub.log_level = 'DEBUG'
+c.Spawner.debug = True
+
+VOLUMES_BASE_PATH = '/volumes'
+
+# Docker image to use for student containers
+c.DockerSpawner.image = 'jupyterhub-student:latest'
+
+# Docker network (create with: docker network create jupyterhub-network)
+c.DockerSpawner.network_name = 'jupyterhub-network'
+
+# Connection to OrbStack Docker socket from the hub container
+c.DockerSpawner.client_kwargs = {'base_url': 'unix:///var/run/docker.sock'}
+
+# IMPORTANT: Internal URL for communication between containers
+# The hub container communicates with user containers via Docker network
+c.JupyterHub.hub_ip = '0.0.0.0'
+c.JupyterHub.hub_connect_ip = 'jupyterhub'
+
+c.DockerSpawner.environment = {
+    # R package library in read-only course directory under work/
+    'R_LIBS_USER': '/home/jovyan/work/R_packages',
+    'R_LIBS_SITE': '/home/jovyan/work/course/R_packages:/usr/local/lib/R/site-library:/usr/lib/R/site-library'
+}
+# Network configuration for student containers
+c.DockerSpawner.use_internal_ip = True
+c.DockerSpawner.network_name = 'jupyterhub-network'
+c.DockerSpawner.extra_host_config = {'network_mode': 'jupyterhub-network'}
+
+# Remove containers after disconnection (optional, set to False to keep containers)
+c.DockerSpawner.remove = True
+
+# Container naming
+c.DockerSpawner.name_template = "jupyter-{username}"
+
+# Volume mounting to persist student data
+# Set root to work/ - everything is persistent
+notebook_dir = '/home/jovyan/work'
+c.DockerSpawner.notebook_dir = notebook_dir
+
+# Personal volume for each student + shared volumes under work/
+# Pre-spawn hook to create user directory
+async def create_user_dir(spawner):
+    """Create user directory if it doesn't exist"""
+    user_dir = os.path.join(VOLUMES_BASE_PATH, spawner.user.name)
+    spawner.log.info(f"Ensured user directory exists: {user_dir}")
+    Path(user_dir).mkdir(parents=True, exist_ok=True)
+    os.chmod(user_dir, 0o755)
+
+c.Spawner.pre_spawn_hook = create_user_dir
+
+c.DockerSpawner.volumes = {
+    # Personal volume (persistent) - root directory
+    'obijupyterhub_shared-{username}' : '/home/jovyan/work',
+    # Shared volume between all students - under work/
+    'obijupyterhub_shared': '/home/jovyan/work/shared',
+    # Shared read-only volume for course files - under work/
+    'obijupyterhub_course': {
+        'bind': '/home/jovyan/work/course',
+        'mode': 'ro'  # read-only
+    }
+}
+
+c.DockerSpawner.volume_driver = 'local'
+c.DockerSpawner.volume_driver_opts = {
+    'type': 'none',
+    'device': '/volumes',
+    'o': 'bind'
+}
+# Memory and CPU configuration (adjust according to your needs)
+c.DockerSpawner.mem_limit = '2G'
+c.DockerSpawner.cpu_limit = 1.0
+
+# User configuration - Simple password authentication for lab
+from jupyterhub.auth import DummyAuthenticator
+
+class SimplePasswordAuthenticator(DummyAuthenticator):
+    """Simple authenticator with a shared password for everyone"""
+    
+    def check_allowed(self, username, authentication=None):
+        """Check if user is allowed"""
+        if authentication is None:
+            return False
+        
+        provided_password = authentication.get('password', '')
+        
+        # Admin user with special password
+        if username == 'admin':
+            admin_password = os.environ.get('JUPYTERHUB_ADMIN_PASSWORD', 'admin2025')
+            return provided_password == admin_password
+        
+        # Regular students with shared password
+        student_password = os.environ.get('JUPYTERHUB_PASSWORD', 'metabar2025')
+        return provided_password == student_password
+
+c.JupyterHub.authenticator_class = SimplePasswordAuthenticator
+
+# To create a list of allowed users, uncomment and modify:
+# c.Authenticator.allowed_users = {'student1', 'student2', 'student3'}
+
+# Or allow any user with the correct password:
+c.Authenticator.allow_all = True
+
+# Admin configuration
+c.Authenticator.admin_users = {'admin'}
+
+# Listening port
+c.JupyterHub.bind_url = 'http://0.0.0.0:8000/jupyter/'
+
+# Timeout
+c.Spawner.start_timeout = 300
+c.Spawner.http_timeout = 120
+
+# Post-start hook to create R_packages directory after volumes are mounted
+c.DockerSpawner.cmd = ['start-notebook.sh']