Technology Stack

The following technologies and tools are used by SPAR.

Technology	Purpose	Version	License
Ubuntu Server	Operating System (cluster nodes)	22.04	Free
Python	Development language	3.11	PSF License
openg2p-fastapi-common	OpenG2P application framework (base for all SPAR services)		MPL 2.0
FastAPI	REST API framework		MIT
Pydantic	Data validation & schemas		MIT
SQLAlchemy	ORM (async)		MIT
Gunicorn	Application server	~22.0	MIT
Uvicorn	ASGI worker		BSD
PostgreSQL	Database (shared commons-postgresql)		PostgreSQL License
Keycloak	Authentication — OIDC / OAuth2		Apache 2.0
Docker	Containerization		Apache 2.0
Helm	Packaging & deployment		Apache 2.0
Kubernetes	Orchestration		Apache 2.0
Istio	Service mesh / ingress		Apache 2.0
Rancher	Cluster management & catalog UI		Apache 2.0
Nginx	Web proxy / ingress		BSD
Prometheus	Monitoring		Apache 2.0
Grafana	Monitoring dashboards		AGPL 3.0
GitHub	Source code management		Commercial (OpenG2P uses Free plan)