[Issue #1107] Add gzip compression support for OTLP exporter

exporter/opentelemetry-exporter-otlp/CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+- Add Gzip compression for exporter
+  ([#1107](https://github.com/open-telemetry/opentelemetry-python/pull/1141))
+
 ## Version 0.13b0
 
 Released 2020-09-17

exporter/opentelemetry-exporter-otlp/src/opentelemetry/exporter/otlp/exporter.py

@@ -26,6 +26,7 @@
 from google.rpc.error_details_pb2 import RetryInfo
 from grpc import (
     ChannelCredentials,
+    Compression,
     RpcError,
     StatusCode,
     insecure_channel,
@@ -123,23 +124,29 @@ class OTLPExporterMixin(
         endpoint: OpenTelemetry Collector receiver endpoint
         credentials: ChannelCredentials object for server authentication
         metadata: Metadata to send when exporting
+        compression: Compression algorithm to be used in channel
     """
 
     def __init__(
         self,
         endpoint: str = "localhost:55680",
         credentials: ChannelCredentials = None,
         metadata: Optional[Tuple[Any]] = None,
+        compression: Compression = Compression.NoCompression,
     ):
         super().__init__()
 
         self._metadata = metadata
         self._collector_span_kwargs = None
 
         if credentials is None:
-            self._client = self._stub(insecure_channel(endpoint))
+            self._client = self._stub(
+                insecure_channel(endpoint, compression=compression)
+            )
         else:
-            self._client = self._stub(secure_channel(endpoint, credentials))
+            self._client = self._stub(
+                secure_channel(endpoint, credentials, compression=compression)
+            )
 
     @abstractmethod
     def _translate_data(