Metrics settings

Every setting below is read from the environment variable in the second column, or from the same key in a YAML configuration file. An unrecognised FANOUT_-prefixed variable is a startup error, so a renamed setting surfaces as a refusal to start rather than as a default nobody chose.

Setting	Environment variable	Type	Default
metrics.public	FANOUT_METRICS_PUBLIC	boolean	false
metrics.token	FANOUT_METRICS_TOKEN	string · secret	—

Secrets

Settings marked secret are redacted from Fanout’s startup configuration log. They are still plain environment variables: anything that can read the process environment can read them.