Add _total suffix to counter metrics that didn't have it #1208
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For compatibility with the OpenMetrics standard. This is a breaking change, but it shouldn't be painful - the semantics of the
metrics doesn't change, only the names.
While here, I renamed a few metrics to follow common naming conventions:
Admittedly, it's also not super necessary - using plain Prometheus you can scrape and query existing metrics just fine. Maybe there are/will be other systems that are pedantic about the standard, then this change will bring some benefits, but otherwise it's kinda compatibility for its own sake. Please shout if you think it's not worth it, but IMO this change is innocent enough to do it :)
I also removed unused label value constants from the
errormetrics
package. Let me know if I shouldn't do that - these vars are exported, but not used anywhere.