Wrong metric types

[IncandescentChrysalis]

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:

1. Run the exporter
2. 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…

[vishwas-sharma2480]

hi @BupycHuk can this bug be replicated in a local env ?