JSON Convert Values for prometheus collector

* Fixes open-telemetry#2502
Arvind2222 · Apr 7, 2022 · 4883455 · 4883455
1 parent f81381c
commit 4883455
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,7 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased](https://github.com/open-telemetry/opentelemetry-python/compare/v1.10.0-0.29b0...HEAD)
-
+- JSON Based Conversion for native Prometheus Exporter, Default to String
+  ([#2589](https://github.com/open-telemetry/opentelemetry-python/pull/2589))
 - Fix parsing of trace flags when extracting traceparent
   ([#2577](https://github.com/open-telemetry/opentelemetry-python/pull/2577))
 - Add default aggregation

diff --git a/exporter/opentelemetry-exporter-prometheus/src/opentelemetry/exporter/prometheus/__init__.py b/exporter/opentelemetry-exporter-prometheus/src/opentelemetry/exporter/prometheus/__init__.py
@@ -63,6 +63,7 @@
 """
 
 import collections
+import json
 import logging
 import re
 from itertools import chain
@@ -157,7 +158,7 @@ def _translate_to_prometheus(
         label_keys = []
         for key, value in metric.attributes.items():
             label_keys.append(self._sanitize(key))
-            label_values.append(str(value))
+            label_values.append(json.dumps(value, default=str))
 
         metric_name = ""
         if self._prefix != "":