Implement Customer Facing Statsbeat #41669

rads-1996 · 2025-06-19T19:38:46Z

Description

Implement customer facing statsbeat as a preview feature.

Packages impacted by this PR

@azure/monitor-opentelemetry-exporter

All SDK Contribution checklist:

The pull request does not introduce [breaking changes]
CHANGELOG is updated for new features, bug fixes or other significant changes.
I have read the contribution guidelines.

General Guidelines and Best Practices

Title of the pull request is clear and informative.
There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

Pull request includes test coverage for the included changes.

Copilot

Pull Request Overview

Implements preview support for customer-facing Statsbeat by integrating metric tracking into the exporter and local storage, and adding unit/integration tests.

Hooks CustomerStatsbeatMetrics into the base exporter to count successful, dropped, and retried items.
Enhances LocalFileStorage.put and get_items to emit Statsbeat metrics on storage errors, capacity, and expiry.
Adds comprehensive tests for metrics collection and backend integration, plus updates constants and changelog.

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
azure/monitor/opentelemetry/exporter/export/_base.py	Integrated customer statsbeat initialization and tracking in the transmission flow.
azure/monitor/opentelemetry/exporter/_storage.py	Extended storage to set and use `customer_statsbeat_metrics` for recording storage-related drops.
tests/statsbeat/test_customer_statsbeat_metrics.py	New unit tests covering success, drop, and retry counting methods.
tests/statsbeat/test_customer_statsbeat_integration.py	New integration tests verifying end-to-end metric export and failure handling.
tests/statsbeat/test_customer_statsbeat.py	Simplified initialization tests and disabled-mode behavior.
azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py	Defined new types and counters for customer Statsbeat.
azure/monitor/opentelemetry/exporter/statsbeat/init.py	Lazy-import setup for `CustomerStatsbeatMetrics`.
azure/monitor/opentelemetry/exporter/_constants.py	Added environment variable constant for enabling preview.
CHANGELOG.md	Documented the preview feature under 1.0.0b36.

github-actions · 2025-06-19T20:04:19Z

API Change Check

APIView identified API level changes in this PR and created the following API reviews

azure-monitor-opentelemetry-exporter

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

lzchen · 2025-06-23T14:12:29Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

-        if not self._enabled:
+        # Create path if it doesn't exist
+        metrics = self._customer_statsbeat_metrics
+        try:


I don't believe you need a try: catch here. Can simply just record the metric if put is called and self._enabled is false.

lzchen · 2025-06-23T14:12:55Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+                        1, 
+                        DropCode.CLIENT_READONLY,
+                        telemetry_type,
+                        exception_message[:100]  # Truncate to avoid high cardinality


No exception message is needed for DropCode.CLIENT_READONLY.

lzchen · 2025-06-23T14:16:20Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

@@ -197,7 +229,20 @@ def put(self, data, lease_period=None):
        )
        if lease_period is None:
            lease_period = self._lease_period
-        return blob.put(data, lease_period=lease_period)
+        result = blob.put(data, lease_period=lease_period)


Can you add a comment here saying blob.put should return a None if an exception was thrown within it.

lzchen · 2025-06-23T14:21:46Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+    def __init__(self):
+        self.total_item_success_count: List[Dict[str, Any]] = []
+        self.total_item_drop_count: List[Dict[str, Any]] = []
+        self.total_item_retry_count: List[Dict[str, Any]] = []


Nit: Add new line at end of file.

lzchen · 2025-06-23T14:22:49Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+            logger.warning("Error getting items from local storage: %s", ex)
+            return []
+
+    def _get_telemetry_type(self, item):


This can probably be put in a common place like utils instead of here.

lzchen · 2025-06-23T14:23:59Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+# Language constant for customer statsbeat
+STATSBEAT_LANGUAGE = "python"
+class TelemetryType(str, Enum):
+    AVAILABILITY = "AVAILABILITY"


These types are not just specific to statsbeat so you can probably put them under _constants.py.

lzchen · 2025-06-23T14:25:45Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+        try:
+            # Map from Azure Monitor envelope types to TelemetryType enum
+            type_map = {
+                "Microsoft.ApplicationInsights.Event": TelemetryType.CUSTOM_EVENT,


Constants like "Microsoft.ApplicationInsights.Metric" are already defined in _constants.py that you can use. I recommend adding to that and then using those symbols here.

lzchen · 2025-06-23T14:26:40Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+    def _get_telemetry_type(self, item):
+        try:
+            # Map from Azure Monitor envelope types to TelemetryType enum
+            type_map = {


You should have the type map defined only once in _constants or _utils instead of defining this everytime this function is called.

lzchen · 2025-06-23T14:27:36Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+            logger.warning("Error getting items from local storage: %s", ex)
+            return []
+
+    def _get_telemetry_type(self, item):


Please add typing to the function signature so we know what type of parameter item to expect (should be TelemetryItem).

lzchen · 2025-06-23T14:29:34Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+                "Microsoft.ApplicationInsights.Availability": TelemetryType.AVAILABILITY,
+            }
+
+            base_type = item.get("data", {}).get("baseType")


I'm surprised TelemetryItem.get() works. Does it actually store the fields as a dict?

lzchen · 2025-06-23T14:30:35Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+
+            base_type = item.get("data", {}).get("baseType")
+            return type_map.get(base_type, TelemetryType.UNKNOWN)
+        except (AttributeError, KeyError):


We shouldn't be try: catching attribute errors like this an instead use the proper getters and field checking in the actual code.

lzchen · 2025-06-23T14:31:39Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

@@ -275,3 +320,81 @@ def _get_current_user(self):
        else:
            user = os.getlogin()
        return user
+
+    def get_items(self, batch_size=50, customer_statsbeat_metrics=None):


Where is this function being used? I'm not sure what it is doing.

lzchen · 2025-06-23T14:33:55Z

...onitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/_storage.py

+                    expired_items.append(item)
+
+            # Track expired items
+            if metrics and expired_items:


Checking expiration is not needed anymore since https://github.com/aep-health-and-standards/Telemetry-Collection-Spec/pull/559

lzchen · 2025-06-23T14:43:31Z

...or/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/export/_base.py

+        """
+        # Check environment variable
+        env_value = os.environ.get("APPLICATIONINSIGHTS_STATSBEAT_ENABLED_PREVIEW", "")
+        is_enabled = env_value.lower() in ("true", "1", "yes")


Let's only accept "true"

lzchen · 2025-06-23T14:53:47Z

...or/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/export/_base.py

+            and not self._instrumentation_collection
+        )
+
+    def _get_telemetry_type(self, envelope: TelemetryItem) -> TelemetryType:


Same comments apply from the above implementation of get_telemetry_type in storage.py. Also, if these functions do the same thing, you should abstract it out to util so you don't have to define it multiple times.

lzchen · 2025-06-23T14:56:56Z

...or/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/export/_base.py

@@ -162,6 +173,24 @@ def __init__(self, **kwargs: Any) -> None:

            collect_statsbeat_metrics(self)

+        # Initialize customer statsbeat if enabled
+        self._customer_statsbeat_metrics = None


Customers can define multiple exporters possibly with different instrumentation keys. We should probably support multiple instrumentation keys in the future but for now we can simply use the first one that we see that is instantiated. With that being said, CustomerStatsbeatMetricsClass should then be a singleton so we don't instantiate it multiple times across exporters (there should be only one global instance of it that is keep track of stats metrics).

lzchen · 2025-06-23T15:09:22Z

...or/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/export/_base.py

+                                    1,
+                                    telemetry_type
+                                )
+                        except Exception as track_ex:


lzchen · 2025-06-23T15:11:06Z

...or/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/export/_base.py

                        envelopes_to_store = [x.as_dict() for x in resend_envelopes]
-                        self.storage.put(envelopes_to_store, 0)
+                        self.storage.put(envelopes_to_store, customer_statsbeat_metrics=self._customer_statsbeat_metrics, lease_period=0)


I believe this would fail as storage.put is not expecting to accept param customer_statsbeat_metrics

lzchen · 2025-06-23T15:11:57Z

...re-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/__init__.py

+# The class will be available via the lazy import below
+
+# Define CustomerStatsbeatMetrics for type checking only
+CustomerStatsbeatMetrics: Any = None


Not sure if we need all this logic? We can just to lazy importing just like how we are doing with regular statsbeat.

lzchen · 2025-06-23T15:12:19Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+    REQUEST = "REQUEST"
+    TRACE = "TRACE"
+    UNKNOWN = "UNKNOWN"
+class DropCode(str, Enum):


Nit: Please add new lines between classes.

lzchen · 2025-06-23T15:12:37Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+    CLIENT_READONLY = "CLIENT_READONLY"
+    CLIENT_STALE_DATA = "CLIENT_STALE_DATA"
+    CLIENT_PERSISTENCE_CAPACITY = "CLIENT_PERSISTENCE_CAPACITY"
+    NON_RETRYABLE_STATUS_CODE = "NON_RETRYABLE_STATUS_CODE"


This and RETRYABLE_STATUS_CODE are not actual constants.

lzchen · 2025-06-23T15:13:02Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+    UNKNOWN = "UNKNOWN"
+class RetryCode(str, Enum):
+    CLIENT_EXCEPTION = "CLIENT_EXCEPTION"
+    CLIENT_STORAGE_DISABLED = "CLIENT_STORAGE_DISABLED"


Remove this due to https://github.com/aep-health-and-standards/Telemetry-Collection-Spec/pull/559

lzchen · 2025-06-23T15:13:09Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+    UNKNOWN = "UNKNOWN"
+class DropCode(str, Enum):
+    CLIENT_EXCEPTION = "CLIENT_EXCEPTION"
+    CLIENT_EXPIRED_DATA = "CLIENT_EXPIRED_DATA"


Remove this due to https://github.com/aep-health-and-standards/Telemetry-Collection-Spec/pull/559

lzchen · 2025-06-23T15:14:57Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+    CLIENT_TIMEOUT = "CLIENT_TIMEOUT"
+    RETRYABLE_STATUS_CODE = "RETRYABLE_STATUS_CODE"
+    UNKNOWN = "UNKNOWN"
+class CustomStatsbeatCounter(str, Enum):


Suggested change

class CustomStatsbeatCounter(str, Enum):

class CustomerStatsbeatMetricName(str, Enum):

lzchen · 2025-06-23T15:16:12Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+    from azure.monitor.opentelemetry.exporter import VERSION
+except ImportError:
+    # Fallback if import fails
+    VERSION = "unknown"


Not sure if this is needed.

lzchen · 2025-06-23T15:16:31Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+
+# Import get_attach_type from _utils if available
+try:
+    from azure.monitor.opentelemetry.exporter._utils.metric_utils import get_attach_type


Not needed.

lzchen · 2025-06-23T15:17:53Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+    - Retried telemetry items (with reasons)
+    """
+
+    def _is_customer_statsbeat_enabled(self) -> bool:


No need for this check if CustomerStatsbeatMetrics is never instantiated when we check in _base.

lzchen · 2025-06-23T15:20:39Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            "connection_string": f"InstrumentationKey={options.instrumentation_key};"
+                                 f"IngestionEndpoint={options.endpoint_url}"
+        }
+        self._customer_statsbeat_exporter = AzureMonitorStatsbeatExporter(**exporter_config)


We cannot use AzureMonitorStatsbeatExporter since it has custom name mappings for regular statsbeat.

lzchen · 2025-06-23T15:21:58Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+        )
+
+        # Initialize base class with required parameters
+        super().__init__(


We should not be reusing this base class as it is specific to regular statsbeat.

lzchen · 2025-06-23T15:22:34Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+        )
+
+        self._customer_statsbeat_meter = self._customer_statsbeat_meter_provider.get_meter(
+            "Azure Monitor Customer Statsbeat"


Not need for custom name, just use __name__

lzchen · 2025-06-23T15:24:00Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+        self.version = version
+        self.compute_type = compute_type
+
+class CustomerStatsbeat:


This is doesn't really belong in a types file. You should define this where this is going to be used instead.

lzchen · 2025-06-23T15:25:09Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            return
+
+        try:
+            counter = getattr(self, "_customer_statsbeat_counter", None)


No need for these checks since self._customer_statsbeat_counter is hard defined by us.

lzchen · 2025-06-23T15:25:56Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            # Check if there's an existing entry for this telemetry type
+            existing_entry = None
+            for entry in counter.total_item_success_count:
+                if entry["telemetry_type"] == telemetry_type:


Use a Dict instead of a List so you can do existence checks in O(1).

lzchen · 2025-06-23T15:26:25Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+                counter.total_item_success_count.append(
+                    {"telemetry_type": telemetry_type, "count": count}
+                )
+        except (TypeError, KeyError) as exc:


These try catchs are unneeded.

lzchen · 2025-06-23T15:28:51Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+
+            # Check if there's an existing entry for this drop code and telemetry type
+            existing_entry = None
+            for entry in counter.total_item_drop_count:


We should be using a nested Dict instead of a List of all possible combinations of drop_code and telemetry_type. A list is not efficient because we have to iterate through the entire list every time we get a new drop code or telemetry type.

lzchen · 2025-06-23T15:29:41Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            drop_code: The reason/code for the drop (enum or string)
+            telemetry_type: The type of telemetry (e.g., REQUEST, DEPENDENCY)
+            exception_message: Optional exception message for logging
+            drop_reason: Optional additional reason for the drop


Drop reason should not be optional.

lzchen · 2025-06-23T15:30:39Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            count: Number of dropped items
+            drop_code: The reason/code for the drop (enum or string)
+            telemetry_type: The type of telemetry (e.g., REQUEST, DEPENDENCY)
+            exception_message: Optional exception message for logging


Nit: Exception message is not for logging, it is needed for drop.reason CLIENT_EXCEPTION or if reason is a status code to explain WHY the telemetry was dropped.

lzchen · 2025-06-23T15:30:52Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+                    new_entry["drop_reason"] = drop_reason
+
+                counter.total_item_drop_count.append(new_entry)
+        except (TypeError, KeyError, AttributeError) as exc:


No need for these try catches.

lzchen · 2025-06-23T15:31:20Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            # This is acceptable in statsbeat since it should never crash the host app
+            logger.warning("Failed to count dropped items: %s", str(exc))
+
+    def count_retry_items(


Everything above applies for this function as well.

lzchen · 2025-06-23T15:31:53Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            # This is acceptable in statsbeat since it should never crash the host app
+            logger.warning("Failed to count retry items: %s", str(exc))
+
+    def shutdown(self) -> None:


No need for a shutdown method as of right now.

lzchen · 2025-06-23T15:33:19Z

...lemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat_types.py

+    ITEM_SUCCESS_COUNT = "preview.item.success.count"
+    ITEM_DROP_COUNT = "preview.item.dropped.count"
+    ITEM_RETRY_COUNT = "preview.item.retry.count"
+class ItemSuccessCount(TypedDict, total=False):


Where are these classes (TypedDicts) being use? I can't seem to find usage.

lzchen · 2025-06-23T15:36:14Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+                return []
+
+            # Create observations for each unique entry
+            for entry in counter.total_item_success_count:


This is too inefficient when using a List. Use a Dict[telemetry_type, count] instead.

lzchen · 2025-06-23T15:36:39Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+            # Create observations for each unique entry
+            for entry in counter.total_item_success_count:
+                if entry.get("count", 0) > 0:
+                    attributes = {


Can define this at the top level since this will never change.

lzchen · 2025-06-23T15:36:51Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+                    entry["count"] = 0
+
+            return observations
+        except (KeyError, AttributeError) as exc:


No need for try except.

lzchen · 2025-06-23T15:38:04Z

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py

+                return []
+
+            # Create observations for each unique entry
+            for entry in counter.total_item_drop_count:


This is too inefficient when using a List. Use a Dict[telemetry_type, Dict[drop_code, Dict[drop.reason, count]]] instead.

lzchen · 2025-06-23T15:40:15Z

This PR is quite big a complex. I suggest implementing this feature in different parts to ensure easier manual testing of each part.

rads-1996 added 2 commits June 19, 2025 12:31

Implementation for customer facing statsbeat

ef7deef

Updated test cases

7755f99

Copilot AI review requested due to automatic review settings June 19, 2025 19:38

rads-1996 requested review from lzchen, jeremydvoss, hectorhdzg, Karlie-777, MSNev and JacksonWeber as code owners June 19, 2025 19:38

github-actions bot added the Monitor - Exporter Monitor OpenTelemetry Exporter label Jun 19, 2025

Copilot AI reviewed Jun 19, 2025

View reviewed changes

Updated CHANGELOG with PR number

8c861ea

JacksonWeber reviewed Jun 20, 2025

View reviewed changes

...opentelemetry-exporter/azure/monitor/opentelemetry/exporter/statsbeat/_customer_statsbeat.py Show resolved Hide resolved

lzchen reviewed Jun 23, 2025

View reviewed changes

	class CustomStatsbeatCounter(str, Enum):
	class CustomerStatsbeatMetricName(str, Enum):

Implement Customer Facing Statsbeat #41669

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Implement Customer Facing Statsbeat #41669

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rads-1996 commented Jun 19, 2025

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lzchen Jun 23, 2025 •

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