- ActivityMonitor now uses /data/activity_samples.sqlite instead of
JupyterHub's main database to avoid SQLite locking conflicts
- Fixes "database is locked" errors that prevented login when both
JupyterHub and ActivityMonitor wrote simultaneously
- Added "Last Active" column to activity table showing relative time
- Add ActivitySample SQLAlchemy model for database persistence
- Add ActivityMonitor singleton with scoring, reset, lifecycle methods
- Add JUPYTERHUB_ACTIVITYMON_INACTIVE_AFTER env var (default 60 min)
- Update defaults: SAMPLE_INTERVAL=600s, RETENTION_DAYS=7
- Fix score calculation to use measured samples only (not theoretical max)
- Add 3-state status: green (active), yellow (inactive), red (offline)
- Add recently_active field in API response
- Add Reset button with confirmation dialog
- Fix green color (explicit #28a745 instead of text-success)
- Add ThreadPoolExecutor for non-blocking Docker stats
- Remove old background sampler code (on-demand sampling now)
- Bump version to 3.7.0
- Truncate requested hours to max available instead of returning error
- Add 'truncated' flag in API response with detailed message
- UI shows warning alert (yellow) when truncated, success (green) otherwise
- Warning displays 4 seconds vs 2 seconds for normal success
- Fixed extend button re-enable after successful extension
Session Extension Feature:
- Add JUPYTERHUB_IDLE_CULLER_MAX_EXTENSION env var (default 24h)
- Add SessionInfoHandler and ExtendSessionHandler API endpoints
- Add Session Status card to home page with countdown timer
- Extension tracking in spawner state (resets on server restart)
- Color-coded warnings (yellow <1h, red <30min)
Environment Settings Harmonization:
- Add all ENV defaults to Dockerfile
- Add idle culler settings to compose.yml
- Standardize logo as JUPYTERHUB_LOGO_URI with file:// prefix
- Update NVIDIA_IMAGE to nvidia/cuda:13.0.2-base-ubuntu24.04
HomeHandler doesn't pass server_version to templates (only AdminHandler does).
Added jupyterhub.__version__ to c.JupyterHub.template_vars for global access.
Add ability to send notifications to selected servers instead of all.
- New ActiveServersHandler at GET /api/notifications/active-servers
- BroadcastNotificationHandler accepts optional recipients array
- UI with "Send to all" checkbox and server selection list
- Select All/Deselect All buttons, dynamic button text
- Backward compatible - sends to all if recipients not specified
- Add JUPYTERHUB_LOGO_FILE config for custom logo (served at /hub/logo)
- Fix CustomAuthorizationAreaHandler with @needs_scope decorator
- Import orm inside get() method to fix NameError
- Simplify page.html logo block (always use base_url/logo)
- Fix Add Users button to use stock btn-light colors (size only)
- Disable hover on expanded card tables via box-shadow override
- Add padding:0 to expanded user detail td cells
- Make collapse buttons more compact (0.2rem 0.3rem)
- Add left padding to username labels
- Add groups page styling (list items, card footer)
- Add notifications page styling (form, textarea, results table)
- Unify button font sizes to 0.8rem across all pages
- Set collapsed user card padding to 0
- Add subtle hover effect on admin user rows (0.015 alpha)
- Style Add Users form panel with dark mode support
- Style authorization and token pages consistently
Removed obsolete 01_nvidia-smi.sh (GPU detection handled in jupyterhub_config.py).
Renamed 02_ensure_groups.py to 01_ensure_groups.py for sequential ordering.
Changed from containrrr/watchtower:latest to nickfedor/watchtower:latest.
New image is actively maintained and compatible with latest Docker versions.
Version bump: 3.2.11 -> 3.3.1
Updated version metadata:
- VERSION_COMMENT reflects key features of v3.2.11
- Added RELEASE_TAG: RELEASE_3.2.11
- Added RELEASE_DATE: 2025-11-09
This marks the official release of version 3.2.11 with configuration-agnostic
volume management, notification broadcast, and privileged access control.
Implemented comprehensive notification broadcast functionality allowing
administrators to send notifications to all active user JupyterLab servers
simultaneously through a dedicated admin panel.
Core Features:
- Admin-only notification panel accessible at /hub/notifications
- Concurrent delivery to all active servers using asyncio with 5s timeout
- Temporary API token generation (5-minute expiry) for authentication
- Support for 6 notification types: default, info, success, warning, error, in-progress
- 140-character message limit with live character counter
- Auto-close toggle and dismiss button in notifications
- Dynamic endpoint URL construction using spawner.server.base_url
- Comprehensive error handling with user-friendly messages
- One-line logging per server with message preview and outcome
Technical Implementation:
- Created BroadcastNotificationHandler in custom_handlers.py
- Created NotificationsPageHandler for admin UI rendering
- Added notifications.html template with Bootstrap 5 form
- Registered handlers in jupyterhub_config.py extra_handlers
- Sends to /jupyterlab-notifications-extension/ingest endpoint
- Payload includes type, message, autoClose, and actions array
- Navigation link added to home.html for admin access
Integration:
- Requires jupyterlab_notifications_extension installed on JupyterLab servers
- Uses correct payload format (type field, not variant)
- Includes Dismiss action button for manual notification closure
Documentation:
- Updated .claude/CLAUDE.md with complete feature documentation
- Updated README.md Features section with notification broadcast details
- Updated .claude/JOURNAL.md with implementation summary
- Removed obsolete FEATURE_PLAN.md
Version: 3.2.0 (bumped from 3.1.2)
