Crate hotmic_stdout

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Exports metrics by logging them in a textual format.

This exporter utilizes the log crate to log a textual representation of metrics in a given snapshot. Metrics that are scoped are represented using an indented tree structure.

As an example, for a snapshot with two metrics – server.msgs_received and server.msgs_sent – we would expect to see:

root:
  server:
    msgs_received: 42
    msgs_sent: 13

If we added another metric – configuration_reloads – we would expect to see:

root:
  configuration_reloads: 2
  server:
    msgs_received: 42
    msgs_sent: 13

Metrics are sorted alphabetically.

§Histograms

Histograms received a little extra love and care when it comes to formatting. This is the general format of a given histogram when rendered:

root:
  connect_time count: 15
  connect_time min: 1334ns
  connect_time p50: 1934ns
  connect_time p99: 5330ns
  connect_time max: 139389ns

The percentiles shown are based on the percentiles configured for hotmic itself, which are generated for us and can’t be influenced at the exporter level. The count value represents the number of samples in the histogram at the time of measurement.

Structs§