[NR-120689] disable prometheus normalization feature-gate by default (#57)

* disable prometheus normalization feature-gate by default

* disable prometheus normalize name feature gate in dockerfile

Author: sigilioso

distributions/nr-otel-collector/Dockerfile

@@ -10,5 +10,5 @@ COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certifica
 COPY --chmod=755 nr-otel-collector /nr-otel-collector
 COPY configs/nr-otel-collector-agent-linux.yaml /etc/nr-otel-collector/config.yaml
 ENTRYPOINT ["/nr-otel-collector"]
-CMD ["--config", "/etc/nr-otel-collector/config.yaml"]
+CMD ["--config", "/etc/nr-otel-collector/config.yaml", "--feature-gates=-pkg.translator.prometheus.NormalizeName"]
 EXPOSE 4317 55678 55679

distributions/nr-otel-collector/nr-otel-collector.conf

@@ -6,4 +6,7 @@ NEW_RELIC_MEMORY_LIMIT_MIB=100
 
 # Command-line options for the nr-otel-collector service.
 # Run `/usr/bin/nr-otel-collector --help` to see all available options.
-OTELCOL_OPTIONS="--config=/etc/nr-otel-collector/config.yaml"
+#
+# pkg.translator.prometheus.NormalizeName feature-gate is disabled by default to avoid altering prometheus metrics
+# names when reported through non-prometheus exporters.
+OTELCOL_OPTIONS="--config=/etc/nr-otel-collector/config.yaml --feature-gates=-pkg.translator.prometheus.NormalizeName"