Add app insights logging to function code

Author: marvinbuss

code/function/fastapp/core/config.py

@@ -1,6 +1,6 @@
 import logging
 
-from pydantic import BaseSettings
+from pydantic import BaseSettings, Field
 
 
 class Settings(BaseSettings):
@@ -10,6 +10,9 @@ class Settings(BaseSettings):
     API_V1_STR: str = "/v1"
     LOGGING_LEVEL: int = logging.INFO
     DEBUG: bool = False
+    APPLICATIONINSIGHTS_CONNECTION_STRING: str = Field(
+        default="", env="APPLICATIONINSIGHTS_CONNECTION_STRING"
+    )
 
 
 settings = Settings()

code/function/fastapp/utils.py

@@ -2,10 +2,12 @@
 from logging import Logger
 
 from fastapp.core.config import settings
+from opencensus.ext.azure.log_exporter import AzureLogHandler
 
 
 def setup_logging(module) -> Logger:
     """Setup logging and event handler.
+
     RETURNS (Logger): The logger object to log activities.
     """
     logger = logging.getLogger(module)
@@ -17,6 +19,16 @@ def setup_logging(module) -> Logger:
     logger_stream_handler.setFormatter(
         logging.Formatter("[%(asctime)s] [%(levelname)s] [%(module)-8.8s] %(message)s")
     )
-
     logger.addHandler(logger_stream_handler)
+
+    # Add azure event handler
+    if settings.APPLICATIONINSIGHTS_CONNECTION_STRING:
+        azure_log_handler = AzureLogHandler()
+        azure_log_handler.setFormatter(
+            logging.Formatter(
+                "[%(asctime)s] [%(levelname)s] [%(module)-8.8s] %(message)s"
+            )
+        )
+        logger.addHandler(azure_log_handler)
+
     return logger

code/function/requirements.txt

@@ -5,3 +5,6 @@
 azure-functions~=1.14.0
 fastapi~=0.96.1
 aiohttp~=3.8.4
+opencensus~=0.11.0
+opencensus-ext-logging~=0.1.1
+opencensus-ext-azure~=1.1.9