* Add generic unavailable and last_updated metrics for prometheus * Updated with feedback from the code review
Prometheus integration
This integration exposes metrics in a Prometheus compatible format.
Metric naming guidelines
Please follow these guidelines while defining metrics.
- Metric and label names should conform to Prometheus naming guidelines.
- Domain-specific metrics should have the domain (
sensor,switch,climate, etc.) as a metric name prefix. - Enum-like values (e.g. entity state or current mode) should be exported using a "boolean" metric (values of 0 or 1) broken down by state/mode (as a metric label).