Prom compatibility: allow disabling the addition of _total suffixes on prometheus counters #3590
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…n prometheus counters (open-telemetry#3590)
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Part of open-telemetry/opentelemetry-go#4305
Motivation
When migrating from OpenCensus to OpenTelemetry, and using Prometheus exporters, it causes a breaking change in the metric name for counters that were not complying with Prometheus naming recommendations. This is because OpenCensus does not add
_totalsuffixes for counters. For example, the metricmy.metric.foobecamemy_metric_fooin OpenCensus. But in OpenTelemetry, it now becomesmy_metric_foo_total.Changes
Prometheus exporters should allow disabling the addition of
_totalsuffixes through configuration.cc @open-telemetry/wg-prometheus @jmacd @jsuereth