SERVER-68637 disable cache metrics for static hosts

2 files changed, 20 insertions, 6 deletions

diff --git a/buildscripts/scons_metrics/metrics.py b/buildscripts/scons_metrics/metrics.py
index 1ba1f7825ad..125204dc4ac 100644
--- a/buildscripts/scons_metrics/metrics.py
+++ b/buildscripts/scons_metrics/metrics.py
@@ -105,8 +105,11 @@ class SconsMetrics:  # pylint: disable=too-many-instance-attributes
             self.total_command_execution_time = self._parse_float(
                 TOTAL_COMMAND_EXECUTION_TIME_REGEX, self.raw_report)
 
-        with open(cache_debug_log_file, "r") as fh:
-            self.final_cache_hit_ratio = self._parse_float(CACHE_HIT_RATIO_REGEX, fh.read())
+        if cache_debug_log_file:
+            with open(cache_debug_log_file, "r") as fh:
+                self.final_cache_hit_ratio = self._parse_float(CACHE_HIT_RATIO_REGEX, fh.read())
+        else:
+            self.final_cache_hit_ratio = 0.0
 
     def make_cedar_report(self) -> List[dict]:
         """Format the data to look like a cedar report json."""
diff --git a/buildscripts/scons_metrics/report.py b/buildscripts/scons_metrics/report.py
index 61b60ccc186..cae5e5ef1d0 100644
--- a/buildscripts/scons_metrics/report.py
+++ b/buildscripts/scons_metrics/report.py
@@ -27,14 +27,25 @@ def main(scons_stdout_log_file: str, scons_cache_debug_log_file: str,
     scons_cache_debug_log_file = os.path.abspath(scons_cache_debug_log_file)
     cedar_report_file = os.path.abspath(cedar_report_file)
 
+    # This is a special file which must be available to use scons cache in evergreen. Here
+    # we are assuming that if this file is not present then this a static host which
+    # can not use scons cache in evergreen so therefore we will disable colleting cache metrics.
+    # Otherwise we assume the cache is available and if the cache log file is not found,
+    # something is not right and we exit with failure.
+    if not os.path.exists('/etc/mongodb-build-system-id'):
+        print(
+            "System is a static host and not connected to AWS cache dir. Skipping scons cache metrics."
+        )
+        scons_cache_debug_log_file = None
+    else:
+        if not os.path.exists(scons_cache_debug_log_file):
+            print(f"Could not find SCons cache debug log file '{scons_cache_debug_log_file}'.")
+            sys.exit(1)
+
     if not os.path.exists(scons_stdout_log_file):
         print(f"Could not find SCons stdout log file '{scons_stdout_log_file}'.")
         sys.exit(1)
 
-    if not os.path.exists(scons_cache_debug_log_file):
-        print(f"Could not find SCons cache debug log file '{scons_cache_debug_log_file}'.")
-        sys.exit(1)
-
     scons_metrics = SconsMetrics(scons_stdout_log_file, scons_cache_debug_log_file)
     if not scons_metrics.raw_report:
         print(