Wrong metric types - Githubissues

Describe the bug The exporter makes arbitrary consideratiosn regarding the type of the exported metrics : https://github.com/percona/mongodb_exporter/blob/v0.40.0/exporter/metrics.go#L163C1-L166C3:

count-suffixed metrics are exported to the Counter type
All other metrics are exported untyped; specifically no Gauge type is ever exporter

For instance, this is incorrect (should be Gauge):

# TYPE mongodb_collstats_storageStats_count counter

To Reproduce Steps to reproduce the behavior:

Run the exporter
Some Counters shall be Gauges but are not exported as such

Expected behavior

Proper types, especially Gauges even when their name is suffixed with count
No untyped metric

Additional context If the MongoDB database offers no hint on the type of the metrics, maybe one way would be to maintain a mapping? Hard to maintain cross-versions, though…

percona / mongodb_exporter

Wrong metric types #803