Add 10 second timeout to VM Resource Detector (#2119)

Author: jeremydvoss

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- `opentelemetry-resource-detector-azure` Added 10s timeout to VM Resource Detector
+  ([#2119](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2119))
+
 ## Version 1.22.0/0.43b0 (2023-12-14)
 
 ### Added

resource/opentelemetry-resource-detector-azure/src/opentelemetry/resource/detector/azure/vm.py

@@ -68,8 +68,8 @@ def get_azure_vm_metadata(self):  # pylint: disable=no-self-use
         request = Request(_AZURE_VM_METADATA_ENDPOINT)
         request.add_header("Metadata", "True")
         try:
-            with urlopen(request).read() as response:
-                return loads(response)
+            with urlopen(request, timeout=10) as response:
+                return loads(response.read())
         except URLError:
             # Not on Azure VM
             return None

resource/opentelemetry-resource-detector-azure/tests/test_vm.py

@@ -363,18 +363,18 @@
 class TestAzureVMResourceDetector(unittest.TestCase):
     @patch("opentelemetry.resource.detector.azure.vm.urlopen")
     def test_linux(self, mock_urlopen):
-        mock_open = Mock()
-        mock_urlopen.return_value = mock_open
-        mock_open.read.return_value = LINUX_JSON
+        mock_response = Mock()
+        mock_urlopen.return_value = mock_response
+        mock_response.read.return_value = LINUX_JSON
         attributes = AzureVMResourceDetector().detect().attributes
         for attribute_key, attribute_value in LINUX_ATTRIBUTES.items():
             self.assertEqual(attributes[attribute_key], attribute_value)
 
     @patch("opentelemetry.resource.detector.azure.vm.urlopen")
     def test_windows(self, mock_urlopen):
-        mock_open = Mock()
-        mock_urlopen.return_value = mock_open
-        mock_open.read.return_value = WINDOWS_JSON
+        mock_response = Mock()
+        mock_urlopen.return_value = mock_response
+        mock_response.read.return_value = WINDOWS_JSON
         attributes = AzureVMResourceDetector().detect().attributes
         for attribute_key, attribute_value in LINUX_ATTRIBUTES.items():
             self.assertEqual(attributes[attribute_key], attribute_value)