Observability and relations

The 12-factor framework support in Charmcraft comes with enabled observability and relations depending on the extension. The following table contains links to the relevant Charmcraft documentation for each web app framework:

Web app framework	Metrics and tracing	Supported integrations
Django	Django extension | Grafana dashboard graphs	Django extension | Relations
Express	Express extension | Grafana dashboard graphs	Express extension | Relations
FastAPI	FastAPI extension | Grafana dashboard graphs	FastAPI extension | Relations
Flask	Flask extension | Grafana dashboard graphs	Flask extension | Relations
Go	Go extension | Grafana dashboard graphs	Go extension | Relations
Spring Boot	Spring Boot extension | Grafana dashboard graphs	Spring Boot extension | Relations

Logging recommendations

For production deployments, prefer this logging setup:

• Write application logs to standard output and standard error. Avoid writing logs to local files.

• Pebble log forwarding is enabled automatically by the logging relation endpoint. Users do not need to configure it manually. See the Pebble documentation.

• For structured framework server logs, see Structured logging configuration.