From 6b33cdfae5334e6e2e2436ad401cda6efb5a1d8e Mon Sep 17 00:00:00 2001
From: tammy-baylis-swi <tammy.baylis@solarwinds.com>
Date: Fri, 4 Apr 2025 17:12:22 -0700
Subject: [PATCH] OTLP exporter compression gzip by default

---
 solarwinds_apm/distro.py  | 3 +++
 tests/unit/test_distro.py | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/solarwinds_apm/distro.py b/solarwinds_apm/distro.py
index fc072d25..6e8477da 100644
--- a/solarwinds_apm/distro.py
+++ b/solarwinds_apm/distro.py
@@ -26,6 +26,7 @@
 from opentelemetry.instrumentation.version import __version__ as inst_version
 from opentelemetry.metrics import NoOpMeterProvider
 from opentelemetry.sdk.environment_variables import (
+    OTEL_EXPORTER_OTLP_COMPRESSION,
     OTEL_EXPORTER_OTLP_LOGS_ENDPOINT,
     OTEL_EXPORTER_OTLP_LOGS_HEADERS,
     OTEL_EXPORTER_OTLP_LOGS_PROTOCOL,
@@ -234,6 +235,8 @@ def _configure(self, **kwargs):
         # Always opt into new semconv for all instrumentors (if supported)
         environ["OTEL_SEMCONV_STABILITY_OPT_IN"] = self.get_semconv_opt_in()
 
+        environ.setdefault(OTEL_EXPORTER_OTLP_COMPRESSION, "gzip")
+
     def load_instrumentor(self, entry_point: EntryPoint, **kwargs):
         """Takes a collection of instrumentation entry points
         and activates them by instantiating and calling instrument()
diff --git a/tests/unit/test_distro.py b/tests/unit/test_distro.py
index 620e76f5..248c17c3 100644
--- a/tests/unit/test_distro.py
+++ b/tests/unit/test_distro.py
@@ -14,6 +14,7 @@
     OTEL_TRACES_EXPORTER
 )
 from opentelemetry.sdk.environment_variables import (
+    OTEL_EXPORTER_OTLP_COMPRESSION,
     OTEL_EXPORTER_OTLP_LOGS_ENDPOINT,
     OTEL_EXPORTER_OTLP_LOGS_HEADERS,
     OTEL_EXPORTER_OTLP_LOGS_PROTOCOL,
@@ -485,6 +486,7 @@ def test_configure_no_env(self, mocker):
         mocker.patch.dict(os.environ, {})
         distro.SolarWindsDistro()._configure()
         assert os.environ[OTEL_PROPAGATORS] == "tracecontext,baggage,solarwinds_propagator"
+        assert os.environ[OTEL_EXPORTER_OTLP_COMPRESSION] == "gzip"
         assert os.environ[OTEL_TRACES_EXPORTER] == "solarwinds_exporter"
         assert os.environ[OTEL_METRICS_EXPORTER] == "otlp_proto_http"
         assert os.environ[OTEL_LOGS_EXPORTER] == "otlp_proto_http"