wrong metrics types for fluentd_output_status_num_errors, et al.?

[nhosoi]

Reading the code as well as in my testing, the values of the following keys could go up and down.

fluentd_status_buffer_queue_length
fluentd_status_buffer_total_bytes
fluentd_output_status_buffer_queue_length
fluentd_output_status_buffer_total_bytes
fluentd_output_status_retry_wait

but for the rest, their values do not get reset but constantly incremented.

fluentd_status_retry_count
fluentd_output_status_emit_count
fluentd_output_status_emit_records
fluentd_output_status_num_errors
fluentd_output_status_retry_count
fluentd_output_status_rollback_count
fluentd_output_status_write_count

Considering this definition [1], isn't the type of the latter set "counter", instead of "gauge"? [1] - https://prometheus.io/docs/concepts/metric_types/

Please note that if you scrape, the result comes with these comments.

# TYPE fluentd_status_buffer_queue_length gauge
# TYPE fluentd_status_buffer_total_bytes gauge
# TYPE fluentd_status_retry_count gauge
# TYPE fluentd_output_status_buffer_queue_length gauge
# TYPE fluentd_output_status_buffer_total_bytes gauge
# TYPE fluentd_output_status_retry_count gauge
# TYPE fluentd_output_status_num_errors gauge
# TYPE fluentd_output_status_emit_count gauge
# TYPE fluentd_output_status_emit_records gauge
# TYPE fluentd_output_status_write_count gauge
# TYPE fluentd_output_status_rollback_count gauge
# TYPE fluentd_output_status_retry_wait gauge

Another note: I'm using fluent-plugin-prometheus (1.3.0). Thanks.

[kazegusuri]

The plugin is scraping the results of fluentd's internal metrics and reporting them as prometheus metrics. We cannot observe changes so the metrics use gauge type.

[chrisbra]

so any way to configure those metrics as counter instead?