Remove experimental worker logs setting

docs/3.0/deploy/infrastructure-concepts/workers.mdx

@@ -103,17 +103,8 @@ If a worker misses three heartbeats, it is considered offline. By default, a wor
 after it stopped sending heartbeats, but you can configure the threshold with the `PREFECT_WORKER_HEARTBEAT_SECONDS` setting.
 
 ### Worker logs
-<Warning>This feature is experimental as of Prefect version 3.1.1</Warning>
+<span class="badge cloud"></span> Workers send logs to the Prefect Cloud API if you're connected to Prefect Cloud.
 
-<span class="badge cloud"></span> Workers can now send logs directly to Prefect Cloud.
-
-To enable this feature, run the command:
-```bash
-prefect config set PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED=true
-```
-See our [profile settings](/3.0/manage/settings-and-profiles/) documentation for more information about changing settings.
-
-Once enabled:
 - All worker logs are automatically sent to the Prefect Cloud API
 - Logs are accessible through both the Prefect Cloud UI and API
 - Each flow run will include a link to its associated worker's logs
@@ -126,8 +117,6 @@ Once enabled:
 - Installed Prefect integrations (e.g., `prefect-aws`, `prefect-gcp`)
 - Live worker logs (if worker logging is enabled)
 
-<Warning>Worker logging is an experimental feature as of Prefect version 3.1.1.</Warning> If your worker is using an earlier version of Prefect or you have not opted in to the experiment, this page will not show worker logs.
-
 Access a worker's details by clicking on the worker's name in the Work Pool list.
 
 ### Start a worker

docs/3.0/develop/settings-ref.mdx

@@ -455,18 +455,6 @@ If `True`, warn on usage of experimental features.
 **Supported environment variables**:
 `PREFECT_EXPERIMENTS_WARN`, `PREFECT_EXPERIMENTAL_WARN`
 
-### `worker_logging_to_api_enabled`
-Enables the logging of worker logs to Prefect Cloud.
-
-**Type**: `boolean`
-
-**Default**: `False`
-
-**TOML dotted key path**: `experiments.worker_logging_to_api_enabled`
-
-**Supported environment variables**:
-`PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED`
-
 ### `telemetry_enabled`
 Enables sending telemetry to Prefect Cloud.
 

schemas/settings.schema.json

@@ -319,15 +319,6 @@
                     "title": "Warn",
                     "type": "boolean"
                 },
-                "worker_logging_to_api_enabled": {
-                    "default": false,
-                    "description": "Enables the logging of worker logs to Prefect Cloud.",
-                    "supported_environment_variables": [
-                        "PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED"
-                    ],
-                    "title": "Worker Logging To Api Enabled",
-                    "type": "boolean"
-                },
                 "telemetry_enabled": {
                     "default": false,
                     "description": "Enables sending telemetry to Prefect Cloud.",

src/prefect/logging/handlers.py

@@ -32,7 +32,6 @@
     PREFECT_LOGGING_TO_API_BATCH_SIZE,
     PREFECT_LOGGING_TO_API_MAX_LOG_SIZE,
     PREFECT_LOGGING_TO_API_WHEN_MISSING_FLOW,
-    get_current_settings,
 )
 
 
@@ -241,10 +240,12 @@ def _get_payload_size(self, log: Dict[str, Any]) -> int:
 
 class WorkerAPILogHandler(APILogHandler):
     def emit(self, record: logging.LogRecord):
-        if get_current_settings().experiments.worker_logging_to_api_enabled:
-            super().emit(record)
-        else:
+        # Open-source API servers do not currently support worker logs, and
+        # worker logs only have an associated worker ID when connected to Cloud,
+        # so we won't send worker logs to the API unless they have a worker ID.
+        if not getattr(record, "worker_id", None):
             return
+        super().emit(record)
 
     def prepare(self, record: logging.LogRecord) -> Dict[str, Any]:
         """

src/prefect/settings/models/experiments.py

@@ -18,11 +18,6 @@ class ExperimentsSettings(PrefectBaseSettings):
         ),
     )
 
-    worker_logging_to_api_enabled: bool = Field(
-        default=False,
-        description="Enables the logging of worker logs to Prefect Cloud.",
-    )
-
     telemetry_enabled: bool = Field(
         default=False,
         description="Enables sending telemetry to Prefect Cloud.",

src/prefect/utilities/urls.py

@@ -3,7 +3,7 @@
 import socket
 import urllib.parse
 from string import Formatter
-from typing import TYPE_CHECKING, Any, Dict, Literal, Optional, Union
+from typing import TYPE_CHECKING, Any, Literal, Optional, Union
 from urllib.parse import urlparse
 from uuid import UUID
 
@@ -135,7 +135,7 @@ def url_for(
     obj_id: Optional[Union[str, UUID]] = None,
     url_type: URLType = "ui",
     default_base_url: Optional[str] = None,
-    **additional_format_kwargs: Optional[Dict[str, Any]],
+    **additional_format_kwargs: Any,
 ) -> Optional[str]:
     """
     Returns the URL for a Prefect object.

src/prefect/workers/base.py

@@ -821,14 +821,14 @@ async def sync_with_backend(self):
             self._logger = get_worker_logger(self)
 
         self._logger.debug(
-            f"Worker synchronized with the Prefect API server. Remote ID: {self.backend_id}"
+            "Worker synchronized with the Prefect API server. "
+            + (f"Remote ID: {self.backend_id}" if self.backend_id else "")
         )
 
     def _should_get_worker_id(self):
         """Determines if the worker should request an ID from the API server."""
         return (
-            get_current_settings().experiments.worker_logging_to_api_enabled
-            and self._client
+            self._client
             and self._client.server_type == ServerType.CLOUD
             and self.backend_id is None
         )
@@ -886,10 +886,7 @@ async def _submit_scheduled_flow_runs(
                 run_logger.info(
                     f"Worker '{self.name}' submitting flow run '{flow_run.id}'"
                 )
-                if (
-                    get_current_settings().experiments.worker_logging_to_api_enabled
-                    and self.backend_id
-                ):
+                if self.backend_id:
                     try:
                         worker_url = url_for(
                             "worker",

tests/test_logging.py

@@ -53,7 +53,6 @@
 from prefect.server.schemas.actions import LogCreate
 from prefect.settings import (
     PREFECT_API_KEY,
-    PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED,
     PREFECT_LOGGING_COLORS,
     PREFECT_LOGGING_LEVEL,
     PREFECT_LOGGING_MARKUP,
@@ -637,23 +636,37 @@ def test_handler_knows_how_large_logs_are(self):
         assert handler._get_payload_size(dict_log) == log_size
 
 
+WORKER_ID = uuid.uuid4()
+
+
 class TestWorkerLogging:
-    class WorkerTestImpl(BaseWorker):
-        type: str = "logging_test"
+    class CloudWorkerTestImpl(BaseWorker):
+        type: str = "cloud_logging_test"
         job_configuration: Type[BaseJobConfiguration] = BaseJobConfiguration
 
         async def _send_worker_heartbeat(self, *_, **__):
-            return "test_backend_id"
+            """
+            Workers only return an ID here if they're connected to Cloud,
+            so this simulates the worker being connected to Cloud.
+            """
+            return WORKER_ID
 
         async def run(self, *_, **__):
             pass
 
-    @pytest.fixture
-    def experiment_enabled(self):
-        with temporary_settings(
-            updates={PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED: True}
-        ):
-            yield
+    class ServerWorkerTestImpl(BaseWorker):
+        type: str = "server_logging_test"
+        job_configuration: Type[BaseJobConfiguration] = BaseJobConfiguration
+
+        async def run(self, *_, **__):
+            pass
+
+        async def _send_worker_heartbeat(self, *_, **__):
+            """
+            Workers only return an ID here if they're connected to Cloud,
+            so this simulates the worker not being connected to Cloud.
+            """
+            return None
 
     @pytest.fixture
     def logging_to_api_enabled(self):
@@ -672,24 +685,24 @@ def logger(self, worker_handler):
         yield logger
         logger.removeHandler(worker_handler)
 
-    async def test_get_worker_logger_works_with_no_backend_id(self, experiment_enabled):
-        async with self.WorkerTestImpl(
+    async def test_get_worker_logger_works_with_no_backend_id(self):
+        async with self.CloudWorkerTestImpl(
             name="test", work_pool_name="test-work-pool"
         ) as worker:
             logger = get_worker_logger(worker)
-            assert logger.name == "prefect.workers.logging_test.test"
+            assert logger.name == "prefect.workers.cloud_logging_test.test"
 
-    async def test_get_worker_logger_works_with_backend_id(self, experiment_enabled):
-        async with self.WorkerTestImpl(
+    async def test_get_worker_logger_works_with_backend_id(self):
+        async with self.CloudWorkerTestImpl(
             name="test", work_pool_name="test-work-pool"
         ) as worker:
             await worker.sync_with_backend()
             logger = get_worker_logger(worker)
-            assert logger.name == "prefect.workers.logging_test.test"
-            assert logger.extra["worker_id"] == "test_backend_id"
+            assert logger.name == "prefect.workers.cloud_logging_test.test"
+            assert logger.extra["worker_id"] == str(WORKER_ID)
 
-    async def test_worker_emits_logs_with_worker_id(self, caplog, experiment_enabled):
-        async with self.WorkerTestImpl(
+    async def test_worker_emits_logs_with_worker_id(self, caplog):
+        async with self.CloudWorkerTestImpl(
             name="test", work_pool_name="test-work-pool"
         ) as worker:
             await worker.sync_with_backend()
@@ -700,21 +713,39 @@ async def test_worker_emits_logs_with_worker_id(self, caplog, experiment_enabled
             ]
 
             assert "testing_with_extras" in caplog.text
-            assert record_with_extras[0].worker_id == worker.backend_id
-            assert worker._logger.extra["worker_id"] == worker.backend_id
+            assert record_with_extras[0].worker_id == str(worker.backend_id)
+            assert worker._logger.extra["worker_id"] == str(worker.backend_id)
 
-    def test_worker_logger_sends_log_to_api_worker(
-        self, logger, mock_log_worker, experiment_enabled, logging_to_api_enabled
+    async def test_worker_logger_sends_log_to_api_worker_when_connected_to_cloud(
+        self, mock_log_worker, worker_handler, logging_to_api_enabled
     ):
-        logger.info("test-worker-log")
+        async with self.CloudWorkerTestImpl(
+            name="test", work_pool_name="test-work-pool"
+        ) as worker:
+            await worker.sync_with_backend()
+            worker._logger.debug("test-worker-log")
+
+        log_statement = [
+            log
+            for call in mock_log_worker.instance().send.call_args_list
+            for log in call.args
+            if log["name"] == worker._logger.name
+            and log["message"] == "test-worker-log"
+        ]
 
-        mock_log_worker.instance().send.assert_called_once()
-        assert len(mock_log_worker.instance().send.call_args_list) == 1
+        assert len(log_statement) == 1
+        assert log_statement[0]["worker_id"] == str(worker.backend_id)
 
-        log_statement = mock_log_worker.instance().send.call_args.args[0]
-        assert log_statement["name"] == logger.name
-        assert log_statement["level"] == 20
-        assert log_statement["message"] == "test-worker-log"
+    async def test_worker_logger_does_not_send_logs_when_not_connected_to_cloud(
+        self, mock_log_worker, worker_handler, logging_to_api_enabled
+    ):
+        async with self.ServerWorkerTestImpl(
+            name="test", work_pool_name="test-work-pool"
+        ) as worker:
+            assert isinstance(worker._logger, logging.Logger)
+            worker._logger.debug("test-worker-log")
+
+        mock_log_worker.instance().send.assert_not_called()
 
 
 class TestAPILogWorker:

tests/test_settings.py

@@ -231,7 +231,6 @@
     "PREFECT_EXPERIMENTAL_WARN": {"test_value": True, "legacy": True},
     "PREFECT_EXPERIMENTS_TELEMETRY_ENABLED": {"test_value": False},
     "PREFECT_EXPERIMENTS_WARN": {"test_value": True},
-    "PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED": {"test_value": False},
     "PREFECT_FLOW_DEFAULT_RETRIES": {"test_value": 10, "legacy": True},
     "PREFECT_FLOWS_DEFAULT_RETRIES": {"test_value": 10},
     "PREFECT_FLOW_DEFAULT_RETRY_DELAY_SECONDS": {"test_value": 10, "legacy": True},

tests/workers/test_base_worker.py

@@ -28,7 +28,6 @@
 from prefect.server.schemas.responses import DeploymentResponse
 from prefect.settings import (
     PREFECT_API_URL,
-    PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED,
     PREFECT_TEST_MODE,
     PREFECT_WORKER_PREFETCH_SECONDS,
     get_current_settings,
@@ -86,14 +85,6 @@ def no_api_url():
         yield
 
 
-@pytest.fixture
-def experimental_logging_enabled():
-    with temporary_settings(
-        updates={PREFECT_EXPERIMENTS_WORKER_LOGGING_TO_API_ENABLED: True}
-    ):
-        yield
-
-
 async def test_worker_requires_api_url_when_not_in_test_mode(no_api_url):
     with pytest.raises(ValueError, match="PREFECT_API_URL"):
         async with WorkerTestImpl(
@@ -197,7 +188,7 @@ async def test_worker_sends_heartbeat_gets_id(respx_mock):
         assert worker.backend_id == test_worker_id
 
 
-async def test_worker_sends_heartbeat_only_gets_id_once(experimental_logging_enabled):
+async def test_worker_sends_heartbeat_only_gets_id_once():
     async with WorkerTestImpl(name="test", work_pool_name="test-work-pool") as worker:
         worker._client.server_type = ServerType.CLOUD
         mock = AsyncMock(return_value="test")
@@ -1567,7 +1558,6 @@ async def test_get_flow_run_logger_with_worker_id_set(
     prefect_client: PrefectClient,
     worker_deployment_wq1,
     work_pool,
-    experimental_logging_enabled,
 ):
     flow_run = await prefect_client.create_flow_run_from_deployment(
         worker_deployment_wq1.id
@@ -1883,7 +1873,7 @@ async def test_env_merge_logic_is_deep(
 
 class TestBaseWorkerHeartbeat:
     async def test_worker_heartbeat_sends_integrations(
-        self, work_pool, hosted_api_server, experimental_logging_enabled
+        self, work_pool, hosted_api_server
     ):
         async with WorkerTestImpl(work_pool_name=work_pool.name) as worker:
             await worker.start(run_once=True)
@@ -1926,7 +1916,7 @@ async def test_worker_heartbeat_sends_integrations(
             assert worker._worker_metadata_sent
 
     async def test_custom_worker_can_send_arbitrary_metadata(
-        self, work_pool, hosted_api_server, experimental_logging_enabled
+        self, work_pool, hosted_api_server
     ):
         class CustomWorker(BaseWorker):
             type: str = "test-custom-metadata"