Remove gRPC dependency for Docker - temporary (#168)

Temporary PR, will be reverted, merging to quickly test E2E on main
build.

By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice.

Author: thpierce

.github/workflows/main_build.yml

@@ -5,6 +5,10 @@ on:
     branches:
       - main
       - "release/v*"
+  pull_request:
+    branches:
+      - main
+
 env:
   AWS_DEFAULT_REGION: us-east-1
   STAGING_ECR_REGISTRY: 637423224110.dkr.ecr.us-east-1.amazonaws.com

Dockerfile

@@ -16,6 +16,8 @@ WORKDIR /operator-build
 ADD aws-opentelemetry-distro/ ./aws-opentelemetry-distro/
 
 RUN mkdir workspace && pip install --target workspace ./aws-opentelemetry-distro
+RUN pip uninstall opentelemetry-exporter-otlp-proto-grpc -y
+RUN pip uninstall grpcio -y
 
 FROM public.ecr.aws/amazonlinux/amazonlinux:minimal
 

aws-opentelemetry-distro/src/amazon/opentelemetry/distro/aws_opentelemetry_configurator.py

@@ -17,7 +17,6 @@
 )
 from amazon.opentelemetry.distro.aws_span_metrics_processor_builder import AwsSpanMetricsProcessorBuilder
 from amazon.opentelemetry.distro.sampler.aws_xray_remote_sampler import AwsXRayRemoteSampler
-from opentelemetry.exporter.otlp.proto.grpc.metric_exporter import OTLPMetricExporter as OTLPGrpcOTLPMetricExporter
 from opentelemetry.exporter.otlp.proto.http.metric_exporter import OTLPMetricExporter as OTLPHttpOTLPMetricExporter
 from opentelemetry.sdk._configuration import (
     _get_exporter_names,
@@ -302,6 +301,12 @@ def create_exporter(self):
                 endpoint=application_signals_endpoint, preferred_temporality=temporality_dict
             )
         if protocol == "grpc":
+            # pylint: disable=import-outside-toplevel
+            # Delay import to only occur if grpc required.
+            from opentelemetry.exporter.otlp.proto.grpc.metric_exporter import (
+                OTLPMetricExporter as OTLPGrpcOTLPMetricExporter,
+            )
+
             return OTLPGrpcOTLPMetricExporter(
                 endpoint=application_signals_endpoint, preferred_temporality=temporality_dict
             )