feat(config): enable telemetry when SCA is on independently from appsec (#672)

Author: florentinl

datadog_lambda/__init__.py

@@ -1,12 +1,5 @@
+import datadog_lambda.config  # noqa: F401 needs to be imported before `ddtrace`
 from datadog_lambda.cold_start import initialize_cold_start_tracing
-import os
-
-
-if os.environ.get("DD_INSTRUMENTATION_TELEMETRY_ENABLED") is None:
-    # Telemetry is required for Appsec Software Composition Analysis
-    os.environ["DD_INSTRUMENTATION_TELEMETRY_ENABLED"] = os.environ.get(
-        "DD_APPSEC_ENABLED", "false"
-    )
 
 
 initialize_cold_start_tracing()

datadog_lambda/config.py

@@ -82,12 +82,6 @@ def _resolve_env(self, key, default=None, cast=None, depends_on_tracing=False):
     logs_injection = _get_env("DD_LOGS_INJECTION", "true", as_bool)
     merge_xray_traces = _get_env("DD_MERGE_XRAY_TRACES", "false", as_bool)
 
-    telemetry_enabled = _get_env(
-        "DD_INSTRUMENTATION_TELEMETRY_ENABLED",
-        "false",
-        as_bool,
-        depends_on_tracing=True,
-    )
     otel_enabled = _get_env("DD_TRACE_OTEL_ENABLED", "false", as_bool)
     profiling_enabled = _get_env("DD_PROFILING_ENABLED", "false", as_bool)
     llmobs_enabled = _get_env("DD_LLMOBS_ENABLED", "false", as_bool)
@@ -96,6 +90,7 @@ def _resolve_env(self, key, default=None, cast=None, depends_on_tracing=False):
         "DD_DATA_STREAMS_ENABLED", "false", as_bool, depends_on_tracing=True
     )
     appsec_enabled = _get_env("DD_APPSEC_ENABLED", "false", as_bool)
+    sca_enabled = _get_env("DD_APPSEC_SCA_ENABLED", "false", as_bool)
 
     is_gov_region = _get_env("AWS_REGION", "", lambda x: x.startswith("us-gov-"))
 
@@ -144,3 +139,11 @@ def _reset(self):
         "Python Lambda Layer FIPS mode is %s.",
         "enabled" if config.fips_mode_enabled else "not enabled",
     )
+
+
+if (
+    "DD_INSTRUMENTATION_TELEMETRY_ENABLED" not in os.environ
+    and not config.sca_enabled
+    and not config.appsec_enabled
+):
+    os.environ["DD_INSTRUMENTATION_TELEMETRY_ENABLED"] = "false"

datadog_lambda/tracing.py

@@ -55,11 +55,6 @@
 logger = logging.getLogger(__name__)
 
 dd_trace_context = None
-if config.telemetry_enabled:
-    # Enable the telemetry client if the user has opted in
-    from ddtrace.internal.telemetry import telemetry_writer
-
-    telemetry_writer.enable()
 
 propagator = HTTPPropagator()
 

tests/test_config.py

@@ -1,3 +1,6 @@
+import importlib
+import sys
+
 import pytest
 
 from datadog_lambda.config import config, _get_env, Config
@@ -14,6 +17,29 @@ def set_env(key, value):
     return set_env
 
 
+def test_config_import_does_not_import_ddtrace(monkeypatch):
+    import datadog_lambda
+
+    with monkeypatch.context() as mp:
+        for name in list(sys.modules):
+            if name == "ddtrace" or name.startswith("ddtrace."):
+                mp.delitem(sys.modules, name, raising=False)
+
+        class _BlockDdtrace(importlib.abc.MetaPathFinder):
+            def find_spec(self, fullname, path=None, target=None):
+                if fullname == "ddtrace" or fullname.startswith("ddtrace."):
+                    raise ImportError("ddtrace must not be imported during this test")
+                return None
+
+        blocker = _BlockDdtrace()
+        mp.setattr(sys, "meta_path", [blocker] + sys.meta_path, raising=False)
+
+        mp.delattr(datadog_lambda, "config", raising=False)
+        mp.delitem(sys.modules, "datadog_lambda.config", raising=False)
+        importlib.invalidate_caches()
+        importlib.import_module("datadog_lambda.config")
+
+
 def _test_as_bool(env_key, conf_key, default):
     return (
         (env_key, conf_key, None, default),
@@ -72,9 +98,6 @@ def _test_as_list(env_key, conf_key, default):
     *_test_as_bool("DD_INTEGRATION_TEST", "integration_test", default=False),
     *_test_as_bool("DD_BOTOCORE_ADD_SPAN_POINTERS", "add_span_pointers", default=True),
     *_test_as_bool("DD_TRACE_OTEL_ENABLED", "otel_enabled", default=False),
-    *_test_as_bool(
-        "DD_INSTRUMENTATION_TELEMETRY_ENABLED", "telemetry_enabled", default=False
-    ),
     *_test_as_bool("DD_MERGE_XRAY_TRACES", "merge_xray_traces", default=False),
     *_test_as_bool("DD_PROFILING_ENABLED", "profiling_enabled", default=False),
     *_test_as_bool("DD_LLMOBS_ENABLED", "llmobs_enabled", default=False),
@@ -86,6 +109,8 @@ def _test_as_list(env_key, conf_key, default):
     ),
     *_test_as_bool("DD_LOCAL_TEST", "local_test", default=False),
     *_test_as_bool("DD_DATA_STREAMS_ENABLED", "data_streams_enabled", default=False),
+    *_test_as_bool("DD_APPSEC_ENABLED", "appsec_enabled", default=False),
+    *_test_as_bool("DD_APPSEC_SCA_ENABLED", "sca_enabled", default=False),
     *_test_int(
         "DD_CAPTURE_LAMBDA_PAYLOAD_MAX_DEPTH", "capture_payload_max_depth", default=10
     ),
@@ -143,9 +168,6 @@ def test_config_from_environ(env_key, conf_key, env_val, conf_val, setenv):
         "DD_DECODE_AUTHORIZER_CONTEXT", "decode_authorizer_context", default=True
     ),
     *_test_as_bool("DD_DATA_STREAMS_ENABLED", "data_streams_enabled", default=False),
-    *_test_as_bool(
-        "DD_INSTRUMENTATION_TELEMETRY_ENABLED", "telemetry_enabled", default=False
-    ),
 )