added support to application insights

Author: yorek

app.py

@@ -6,15 +6,26 @@
 import pyodbc
 import socket
 from threading import Lock
+from opencensus.ext.azure.trace_exporter import AzureExporter
+from opencensus.ext.flask.flask_middleware import FlaskMiddleware
+from opencensus.trace.samplers import ProbabilitySampler
 
 # Initialize Flask
 app = Flask(__name__)
 
+# Setup Azure Monitor
+middleware = FlaskMiddleware(
+    app,
+    exporter=AzureExporter(connection_string="InstrumentationKey={0}".format(os.environ['APPINSIGHTS_KEY'])),
+    sampler=ProbabilitySampler(rate=1.0),
+)
+
 # Setup Flask Restful framework
 api = Api(app)
 parser = reqparse.RequestParser()
 parser.add_argument('customer')
 
+# Implement manual connection pooling
 class ConnectionManager(object):    
     __instance = None
     __conn_index = 0

azure-deploy.sh

@@ -30,6 +30,16 @@ az appservice plan create \
     --sku B1 \
     --is-linux
 
+echo "Creating Application Insight..."
+az resource create \
+    -g $resourceGroup \
+    -n $appName-ai \
+    --resource-type "Microsoft.Insights/components" \
+    --properties '{"Application_Type":"web"}'
+
+echo "Reading Application Insight Key..."
+aikey=`az resource show -g $resourceGroup -n $appName-ai --resource-type "Microsoft.Insights/components" --query properties.InstrumentationKey -o tsv`
+
 echo "Creating Web Application...";
 az webapp create \
     -g $resourceGroup \
@@ -45,3 +55,11 @@ az webapp config connection-string set \
     -n $appName \
     --settings WWIF="$SQLAZURECONNSTR_WWIF" \
     --connection-string-type=SQLAzure
+
+echo "Configuring Application Insights...";
+az webapp config appsettings set \
+    -g $resourceGroup \
+    -n $appName \
+    --settings APPINSIGHTS_KEY="$aikey"
+
+echo "Done."

requirements.txt

@@ -1,4 +1,4 @@
 pyodbc
 flask
 flask-restful
-applicationinsights
+opencensus-ext-azure