Instrument the sample application using CWOperator. (#44)

This PR Instrument the sample application using CWOperator by setting up
following:
1. annotation: instrumentation.opentelemetry.io/inject-python: "true"
2. run the server with `--noreload`
3. Add `DJANGO_SETTINGS_MODULE` env variable.
4. Add `PYTHONPATH` env variable, this is required as CWOperator
instrumentation when application is mount in a specific directory
instead of root.
5. Add `OTEL_TRACES_SAMPLER`, this will be removed when Xray remote
sampler is ready.

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copy, and redistribute this contribution, under the terms of your
choice.

Author: zzhlogin

sample-applications/vehicle-dealership-sample-app/docker-compose.yaml

@@ -28,10 +28,13 @@ services:
       context: .
       dockerfile: VehicleInventoryApp/Dockerfile
     container_name: vehicle-inventory-backend
-    command: sh -c "python3 manage.py migrate --noinput && python3 manage.py collectstatic --noinput && python3 manage.py runserver 0.0.0.0:8001"
+    command: sh -c "python3 manage.py migrate --noinput && python3 manage.py collectstatic --noinput && python3 manage.py runserver 0.0.0.0:8001 --noreload"
     restart: always
     volumes:
       - ./VehicleInventoryApp/.:/vehicle-inventory-app
+    environment:
+      DJANGO_SETTINGS_MODULE: "VehicleInventoryApp.settings"
+      OTEL_TRACES_SAMPLER: "always_on"
     ports:
       - "8001:8001"
     depends_on:
@@ -44,11 +47,14 @@ services:
       context: .
       dockerfile: ImageServiceApp/Dockerfile
     container_name: image-service-backend
-    command: sh -c "python3 manage.py runserver 0.0.0.0:8000"
+    command: sh -c "python3 manage.py runserver 0.0.0.0:8000 --noreload"
     restart: always
     volumes:
       - ./ImageServiceApp/.:/image-service-app
       - $HOME/.aws/credentials:/home/app/.aws/credentials:ro
+    environment:
+      DJANGO_SETTINGS_MODULE: "ImageServiceApp.settings"
+      OTEL_TRACES_SAMPLER: "always_on"
     ports:
       - "8000:8000"
     depends_on:

sample-applications/vehicle-dealership-sample-app/eks/backend-deployment.yaml

@@ -22,6 +22,7 @@ spec:
       annotations:
         kompose.cmd: kompose convert -f docker-compose.yaml
         kompose.version: 1.31.2 (HEAD)
+        instrumentation.opentelemetry.io/inject-python: "true"
       creationTimestamp: null
       labels:
         io.kompose.network/vehicleinventoryapp-default: "true"
@@ -31,7 +32,7 @@ spec:
         - args:
             - sh
             - -c
-            - python3 manage.py migrate --noinput && python3 manage.py collectstatic --noinput && python3 manage.py runserver 0.0.0.0:8001
+            - python3 manage.py migrate --noinput && python3 manage.py collectstatic --noinput && python3 manage.py runserver 0.0.0.0:8001 --noreload
           image: ${REPOSITORY_PREFIX}/pythonsampleapp/vehicle-inventory-service:latest
           name: vehicle-inventory-backend
           env:
@@ -41,6 +42,13 @@ spec:
               value: ${POSTGRES_PASSWORD}
             - name: POSTGRES_USER
               value: djangouser
+            - name: PYTHONPATH
+              value: "/vehicle-inventory-app"
+            - name: DJANGO_SETTINGS_MODULE
+              value: "VehicleInventoryApp.settings"
+#              TODO: Remove OTEL_TRACES_SAMPLER when XRay trace sampler is ready
+            - name: OTEL_TRACES_SAMPLER
+              value: "always_on"
           imagePullPolicy: Always
           ports:
             - containerPort: 8001

sample-applications/vehicle-dealership-sample-app/eks/image-backend-deployment.yaml

@@ -22,6 +22,7 @@ spec:
       annotations:
         kompose.cmd: Kompose convert -f docker-compose.yaml
         kompose.version: 1.31.2 (HEAD)
+        instrumentation.opentelemetry.io/inject-python: "true"
       creationTimestamp: null
       labels:
         io.kompose.network/imageserviceapp-default: "true"
@@ -31,7 +32,7 @@ spec:
         - args:
             - sh
             - -c
-            - python3 manage.py runserver 0.0.0.0:8000
+            - python3 manage.py runserver 0.0.0.0:8000 --noreload
           image: ${REPOSITORY_PREFIX}/pythonsampleapp/image-service:latest
           name: image-service-backend
           imagePullPolicy: Always
@@ -49,5 +50,12 @@ spec:
               value: ${POSTGRES_PASSWORD}
             - name: POSTGRES_USER
               value: djangouser
+            - name: PYTHONPATH
+              value: "/image-service-app"
+            - name: DJANGO_SETTINGS_MODULE
+              value: "ImageServiceApp.settings"
+#              TODO: Remove OTEL_TRACES_SAMPLER when XRay trace sampler is ready
+            - name: OTEL_TRACES_SAMPLER
+              value: "always_on"
       restartPolicy: Always
 status: {}