Implement 'process.runtime.*' attributes for resources

Implement support for the the 'process.runtime.name',
'process.runtime.version' and 'process.runtime.description'
as specified in the resource semantic conventions for
processes.

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/open-telemetry/opentelemetry-python/compare/v1.11.1-0.30b1...HEAD)
 
+- Implement 'process.runtime.{name,version,description}' resource attributes
+  ([#2660](https://github.com/open-telemetry/opentelemetry-python/pull/2660))
 - Move Metrics API behind internal package
   ([#2651](https://github.com/open-telemetry/opentelemetry-python/pull/2651))
 

opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py

@@ -43,7 +43,10 @@
     )
     print(trace.get_tracer_provider().resource.attributes)
 
-    {'telemetry.sdk.language': 'python',
+    {'process.runtime.name': 'cpython',
+    'process.runtime.version': '3.8.6',
+    'process.runtime.description': '3.8.6 (default, Sep 30 2020, 04:00:38) [GCC 10.2.0]'
+    'telemetry.sdk.language': 'python',
     'telemetry.sdk.name': 'opentelemetry',
     'telemetry.sdk.version': '0.13.dev0',
     'service.name': 'shoppingcart',
@@ -59,6 +62,7 @@
 import concurrent.futures
 import logging
 import os
+import sys
 import typing
 from json import dumps
 
@@ -243,8 +247,17 @@ def __hash__(self):
 
 
 _EMPTY_RESOURCE = Resource({})
+_runtime_version = ".".join(map(
+    str,
+    sys.version_info[:3]
+    if sys.version_info.releaselevel == "final" and not sys.version_info.serial
+    else sys.version_info
+))
 _DEFAULT_RESOURCE = Resource(
     {
+        PROCESS_RUNTIME_NAME: sys.implementation.name,
+        PROCESS_RUNTIME_VERSION: _runtime_version,
+        PROCESS_RUNTIME_DESCRIPTION: sys.version,
         TELEMETRY_SDK_LANGUAGE: "python",
         TELEMETRY_SDK_NAME: "opentelemetry",
         TELEMETRY_SDK_VERSION: _OPENTELEMETRY_SDK_VERSION,