gns3-server/docs/gns3-copilot/server-settings-api-roadmap.md

This document is a roadmap/planning document. The described features have not been implemented yet.

Server Settings REST API — Roadmap

Problem

Currently, gns3_server.conf can only be modified by directly editing the file on disk. There is no REST API endpoint to read or write server configuration, which prevents the Web UI from offering a settings page for server parameters.

Proposed API

GET  /v3/settings  →  Return all current server settings
PUT  /v3/settings  →  Update and persist server settings

Implementation Plan

1. Add save_config() to Config class (gns3server/config.py)

The Config class currently only reads configuration (via read_config() / reload()). A save_config() method is needed to serialize the in-memory ServerConfig pydantic model back to INI format and write it to disk.

Serialization details:

• bool → "True" / "False" (configparser convention)
• SecretStr → get_secret_value()
• Enum → .value
• List[str] → semi-colon for additional_images_paths, comma for allowed_interfaces
• None → skip

2. Add a settings getter/setter to Config to allow programmatic updates to the in-memory settings.

3. New route file (gns3server/api/routes/controller/settings.py):

• GET /v3/settings — returns the full ServerConfig as JSON (pydantic automatically masks SecretStr fields as "********")
• PUT /v3/settings — accepts ServerConfig, merges existing secrets when placeholder values ("********") are submitted, calls save_config(), and triggers runtime config update callbacks

Both endpoints require get_current_active_user for authentication.

4. Register the new router in gns3server/api/routes/controller/__init__.py under the /settings prefix.

Security

• All settings endpoints require admin authentication (get_current_active_user)
• SecretStr fields (compute_password, default_admin_password, jwt_secret_key) are masked in responses
• On write, unchanged secrets are preserved via placeholder detection

Related Files

File	Role
gns3server/config.py	Config singleton with read_config() / reload()
gns3server/schemas/config.py	ServerConfig pydantic model with all 9 sub-models
gns3server/api/routes/controller/__init__.py	Controller router mounting
gns3server/controller/__init__.py	Controller._update_config() for runtime credential sync

Status

• gns3server/config.py: add save_config() method
• gns3server/config.py: add settings getter/setter
• gns3server/api/routes/controller/settings.py: new route file with GET and PUT endpoints
• gns3server/api/routes/controller/init.py: register settings router under /settings
• gns3server/api/routes/controller/controller.py: add notification emission on config change