Christian Schneider 4943c97963 Add option to enforce strict monotonicy in metrics. ...

This change adds the new option `force_monotonicy` to metric
configurations. It is intended for almost-but-not-really monotinic
sources, such as counters which reset when the sensor is restarted.

When this option is set to `true`, the source metric value is regularly
written to disk. This allows us to detect and compensate counter resets
even between restarts. When a reset is detected, the last value before
the reset becomes the new offset, which is added to the metric value
going forth.  The result is a strictly monotonic time series, like an
ever increasing counter.

2024-02-05 21:04:52 +01:00

..

mqtt2prometheus.go

Add option to enforce strict monotonicy in metrics.

2024-02-05 21:04:52 +01:00