# Environment Variables This is the reference for all environment variables used by umh-core. These variables override or supplement configuration from `config.yaml`. | Name | Values | Description | | ---------------------- | -------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | LOGGING\_LEVEL | PRODUCTION, DEBUG | Controls log verbosity. DEBUG shows detailed internal operations | | AUTH\_TOKEN | (Base64 encoded token) | Management Console authentication token. Overrides auth token from config.yaml | | API\_URL | , | Management Console API endpoint. Use staging for testing environments | | RELEASE\_CHANNEL | enterprise, stable, nightly | Auto-update channel. Enterprise = most stable, nightly = latest features | | ALLOW\_INSECURE\_TLS | true, false | Skip TLS certificate verification. Use for corporate firewalls with MITM proxies | | S6\_PERSIST\_DIRECTORY | true/1/TRUE/True, (unset/false/other) | Controls S6 service directory persistence. Truthy values (true, 1, TRUE, etc.) = /data/services (persist across container restarts for debugging). Default/false = /tmp/umh-core-services (cleared on container restart for fresh state) | | LOCATION\_<0-6> | (string values) | Sets Agent location path levels 0-6. Example: LOCATION\_0=factory, LOCATION\_1=line1 |