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Signed-off-by: Sky Singh <akashsingh2210670@gmail.com>
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I've analyzed the Python codebase and identified opportunities to add observability instrumentation. Here are my recommendations, sorted by priority:

High Priority:

  1. Add OpenTelemetry tracing to route handlers to track API request flows
  2. Add error handling with proper logging and span status updates
  3. Instrument critical business operations (order creation, refunds, etc.)

Medium Priority:

  1. Add metrics for endpoint latency and error rates
  2. Track user actions via Amplitude events
  3. Add contextual logging for business operations

Low Priority:

  1. Add debug logging for development troubleshooting
  2. Add span attributes for additional context

Here are my specific recommendations:

FILE: test-app/main.py LINE: 4 SUGGESTION: ```diff # app.py from flask import Flask from routes import user_routes, product_routes, order_routes + import logging + from opentelemetry import trace + from opentelemetry.instrumentation.flask import FlaskInstrumentor + from opentelemetry.sdk.trace import TracerProvider + from opentelemetry.sdk.resources import SERVICE_NAME, Resource def create_app(): app = Flask(__name__) + # Configure logging + logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s') + + # Configure OpenTelemetry + trace.set_tracer_provider(TracerProvider(resource=Resource.create({SERVICE_NAME: "test-app"}))) + FlaskInstrumentor().instrument_app(app) app.register_blueprint(user_routes.bp) app.register_blueprint(product_routes.bp) app.register_blueprint(order_routes.bp) + + # Register error handlers + @app.errorhandler(500) + def server_error(e): + logging.error(f"Server error: {str(e)}") + return {"error": "Internal server error"}, 500 return app 
FILE: test-app/routes/order_routes.py LINE: 2 SUGGESTION: ```diff # routes/order_routes.py from flask import Blueprint, jsonify, request from services.order_service import create_order, get_order_by_id, update_order_by_id, delete_order_by_id + import logging + from opentelemetry import trace + import amplitude + tracer = trace.get_tracer(__name__) + logger = logging.getLogger(__name__) bp = Blueprint('order', __name__, url_prefix='/orders') @bp.route('/create', methods=['POST']) def new_order(): + with tracer.start_as_current_span("create_order") as span: + logger.info("Processing order creation request") + span.set_attribute("http.method", "POST") + span.set_attribute("endpoint", "/orders/create") + + try: + data = request.json + span.set_attribute("order.data", str(data)) + result = create_order(data) + + # Track order creation event + amplitude.track({ + "event_type": "order_created", + "user_id": data.get("user_id", "unknown"), + "event_properties": { + "order_id": result.get("order", {}).get("id", "unknown"), + "total_amount": data.get("amount", 0) + } + }) + + logger.info(f"Order created successfully: {result}") + return jsonify(result) + except Exception as e: + logger.error(f"Error creating order: {str(e)}") + span.set_status(trace.StatusCode.ERROR, str(e)) + return jsonify({"error": "Failed to create order"}), 500 - data = request.json - return jsonify(create_order(data)) 
FILE: test-app/routes/order_routes.py LINE: 13 SUGGESTION: ```diff @bp.route('/<id>', methods=['GET']) def get_order(id): + with tracer.start_as_current_span("get_order") as span: + logger.info(f"Retrieving order with ID: {id}") + span.set_attribute("http.method", "GET") + span.set_attribute("endpoint", f"/orders/{id}") + span.set_attribute("order.id", id) + + try: + order = get_order_by_id(id) + if order: + logger.info(f"Order found: {order}") + return jsonify(order) + + logger.warning(f"Order not found with ID: {id}") + span.set_attribute("order.found", False) + return jsonify({"message": "Order not found"}), 404 + except Exception as e: + logger.error(f"Error retrieving order {id}: {str(e)}") + span.set_status(trace.StatusCode.ERROR, str(e)) + return jsonify({"error": "Failed to retrieve order"}), 500 - order = get_order_by_id(id) - if order: - return jsonify(order) - return jsonify({"message": "Order not found"}), 404 
FILE: test-app/routes/order_routes.py LINE: 20 SUGGESTION: ```diff @bp.route('/<id>', methods=['PUT']) def update_order(id): + with tracer.start_as_current_span("update_order") as span: + logger.info(f"Updating order with ID: {id}") + span.set_attribute("http.method", "PUT") + span.set_attribute("endpoint", f"/orders/{id}") + span.set_attribute("order.id", id) + + try: + data = request.json + span.set_attribute("order.update_data", str(data)) + updated_order = update_order_by_id(id, data) + + if updated_order: + logger.info(f"Order updated successfully: {updated_order}") + + # Track order update event + amplitude.track({ + "event_type": "order_updated", + "user_id": data.get("user_id", "unknown"), + "event_properties": { + "order_id": id, + "update_fields": list(data.keys()) + } + }) + + return jsonify(updated_order) + + logger.warning(f"Order not found for update with ID: {id}") + span.set_attribute("order.found", False) + return jsonify({"message": "Order not found"}), 404 + except Exception as e: + logger.error(f"Error updating order {id}: {str(e)}") + span.set_status(trace.StatusCode.ERROR, str(e)) + return jsonify({"error": "Failed to update order"}), 500 - data = request.json - updated_order = update_order_by_id(id, data) - if updated_order: - return jsonify(updated_order) - return jsonify({"message": "Order not found"}), 404 
FILE: test-app/routes/order_routes.py LINE: 27 SUGGESTION: ```diff @bp.route('/<id>', methods=['DELETE']) def delete_order(id): + with tracer.start_as_current_span("delete_order") as span: + logger.info(f"Deleting order with ID: {id}") + span.set_attribute("http.method", "DELETE") + span.set_attribute("endpoint", f"/orders/{id}") + span.set_attribute("order.id", id) + + try: + result = delete_order_by_id(id) + if result: + logger.info(f"Order deleted successfully: {id}") + + # Track order deletion event + amplitude.track({ + "event_type": "order_deleted", + "event_properties": { + "order_id": id + } + }) + + return jsonify({"message": "Order deleted"}) + + logger.warning(f"Order not found for deletion with ID: {id}") + span.set_attribute("order.found", False) + return jsonify({"message": "Order not found"}), 404 + except Exception as e: + logger.error(f"Error deleting order {id}: {str(e)}") + span.set_status(trace.StatusCode.ERROR, str(e)) + return jsonify({"error": "Failed to delete order"}), 500 - if delete_order_by_id(id): - return jsonify({"message": "Order deleted"}) - return jsonify({"message": "Order not found"}), 404 
FILE: test-app/routes/product_routes.py LINE: 2 SUGGESTION: ```diff # routes/product_routes.py from flask import Blueprint, jsonify, request from services.product_service import get_products, create_product, get_product, update_product, delete_product, search_products + import logging + from opentelemetry import trace + import amplitude + tracer = trace.get_tracer(__name__) + logger = logging.getLogger(__name__) bp = Blueprint('product', __name__, url_prefix='/products') 
FILE: test-app/routes/product_routes.py LINE: 8 SUGGESTION: ```diff @bp.route('/', methods=['GET']) def list_products(): + with tracer.start_as_current_span("list_products") as span: + logger.info("Retrieving product list") + span.set_attribute("http.method", "GET") + span.set_attribute("endpoint", "/products/") + + try: + products = get_products() + span.set_attribute("products.count", len(products)) + logger.info(f"Retrieved {len(products)} products") + return jsonify(products) + except Exception as e: + logger.error(f"Error retrieving products: {str(e)}") + span.set_status(trace.StatusCode.ERROR, str(e)) + return jsonify({"error": "Failed to retrieve products"}), 500 - return jsonify(get_products()) 
FILE: test-app/routes/product_routes.py LINE: 12 SUGGESTION: ```diff @bp.route('/<id>', methods=['GET']) def get_product_by_id(id): + with tracer.start_as_current_span("get_product") as span: + logger.info(f"Retrieving product with ID: {id}") + span.set_attribute("http.method", "GET") + span.set_attribute("endpoint", f"/products/{id}") + span.set_attribute("product.id", id) + + try: + product = get_product(id) + if product: + logger.info(f"Product found: {product}") + return jsonify(product) + + logger.warning(f"Product not found with ID: {id}") + span.set_attribute("product.found", False) + return jsonify({'message': 'Product not found'}), 404 + except Exception as e: + logger.error(f"Error retrieving product {id}: {str(e)}") + span.set_status(trace.StatusCode.ERROR, str(e)) + return jsonify({"error": "Failed to retrieve product"}), 500 - product = get_product(id) - if product: - return jsonify(product) - return jsonify({'message': 'Product not found'}), 404 
FILE: test-app/routes/product_routes.py LINE: 19 SUGGESTION: ```diff @bp.route('/', methods=['POST']) def add_product(): + with tracer.start_as_current_span("create_product") as span: + logger.info("Processing product creation request") + span.set_attribute("http.method", "POST") + span.set_attribute("endpoint", "/products/") + + try: + data = request.get_json() + span.set_attribute("product.data", str(data)) + product = create_product(data) + + # Track product creation event + amplitude.track({ + "event_type": "product_created", + "event_properties": { + "product_id": product.get("id", "unknown"), + "product_name": data.get("name", "unknown") + } + }) + + logger.info(f"Product created successfully: {product}") + return jsonify(product), 201 + except Exception as e: + logger.error(f"Error creating product: {str(e)}") + span.set_status(trace.StatusCode.ERROR, str(e)) + return jsonify({"error": "Failed to create product"}), 500 - data = request.get_json() - product = create_product(data) - return jsonify(product), 201 
FILE: test-app/routes/refund_routes.py LINE: 1 SUGGESTION: ```diff from flask import Blueprint, request, jsonify + import logging + from opentelemetry import trace + import amplitude + tracer = trace.get_tracer(__name__) + logger = logging.getLogger(__name__) refund_bp = Blueprint('refund', __name__, url_prefix='/refund') 
FILE: test-app/routes/refund_routes.py LINE: 6 SUGGESTION: ```diff @refund_bp.route('/', methods=['POST']) def create_refund(): + with tracer.start_as_current_span("create_refund") as span: + logger.info("Processing refund creation request") + span.set_attribute("http.method", "POST") + span.set_attribute("endpoint", "/refund/") + + try: + data = request.get_json() + span.set_attribute("refund.data", str(data)) + + # Process the refund creation logic here + # Example: + order_id = data.get('order_id') + amount = data.get('amount') + + span.set_attribute("refund.order_id", order_id) + span.set_attribute("refund.amount", amount) + + if not order_id or not amount: + logger.warning(f"Invalid refund request: missing order_id or amount") + span.set_status(trace.StatusCode.ERROR, "Missing required fields") + return jsonify({'error': 'Order ID and amount are required'}), 400 + + # In a real application, you would interact with a database or payment gateway here + # For this example, we'll just return a success message + + # Track refund creation event + amplitude.track({ + "event_type": "refund_initiated", + "event_properties": { + 
# app.py
from flask import Flask
from routes import user_routes, product_routes, order_routes

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Suggested change
import logging
from opentelemetry import trace
from opentelemetry.instrumentation.flask import FlaskInstrumentor
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.resources import SERVICE_NAME, Resource
# Configure logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
# Configure OpenTelemetry
trace.set_tracer_provider(TracerProvider(resource=Resource.create({SERVICE_NAME: "test-app"})))
FlaskInstrumentor().instrument_app(app)
# Register error handlers
@app.errorhandler(500)
def server_error(e):
logging.error(f"Server error: {str(e)}")
return {"error": "Internal server error"}, 500
@@ -0,0 +1,31 @@
# routes/order_routes.py
from flask import Blueprint, jsonify, request
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from flask import Blueprint, jsonify, request
import logging
from opentelemetry import trace
import amplitude
tracer = trace.get_tracer(__name__)
logger = logging.getLogger(__name__)
with tracer.start_as_current_span("create_order") as span:
logger.info("Processing order creation request")
span.set_attribute("http.method", "POST")
span.set_attribute("endpoint", "/orders/create")
try:
data = request.json
span.set_attribute("order.data", str(data))
result = create_order(data)
# Track order creation event
amplitude.track({
"event_type": "order_created",
"user_id": data.get("user_id", "unknown"),
"event_properties": {
"order_id": result.get("order", {}).get("id", "unknown"),
"total_amount": data.get("amount", 0)
}
})
logger.info(f"Order created successfully: {result}")
return jsonify(result)
except Exception as e:
logger.error(f"Error creating order: {str(e)}")
span.set_status(trace.StatusCode.ERROR, str(e))
return jsonify({"error": "Failed to create order"}), 500
return jsonify(create_order(data))

@bp.route('/<id>', methods=['GET'])
def get_order(id):
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def get_order(id):
with tracer.start_as_current_span("get_order") as span:
logger.info(f"Retrieving order with ID: {id}")
span.set_attribute("http.method", "GET")
span.set_attribute("endpoint", f"/orders/{id}")
span.set_attribute("order.id", id)
try:
order = get_order_by_id(id)
if order:
logger.info(f"Order found: {order}")
return jsonify(order)
logger.warning(f"Order not found with ID: {id}")
span.set_attribute("order.found", False)
return jsonify({"message": "Order not found"}), 404
except Exception as e:
logger.error(f"Error retrieving order {id}: {str(e)}")
span.set_status(trace.StatusCode.ERROR, str(e))
return jsonify({"error": "Failed to retrieve order"}), 500
return jsonify({"message": "Order not found"}), 404

@bp.route('/<id>', methods=['PUT'])
def update_order(id):
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def update_order(id):
with tracer.start_as_current_span("update_order") as span:
logger.info(f"Updating order with ID: {id}")
span.set_attribute("http.method", "PUT")
span.set_attribute("endpoint", f"/orders/{id}")
span.set_attribute("order.id", id)
try:
data = request.json
span.set_attribute("order.update_data", str(data))
updated_order = update_order_by_id(id, data)
if updated_order:
logger.info(f"Order updated successfully: {updated_order}")
# Track order update event
amplitude.track({
"event_type": "order_updated",
"user_id": data.get("user_id", "unknown"),
"event_properties": {
"order_id": id,
"update_fields": list(data.keys())
}
})
return jsonify(updated_order)
logger.warning(f"Order not found for update with ID: {id}")
span.set_attribute("order.found", False)
return jsonify({"message": "Order not found"}), 404
except Exception as e:
logger.error(f"Error updating order {id}: {str(e)}")
span.set_status(trace.StatusCode.ERROR, str(e))
return jsonify({"error": "Failed to update order"}), 500
return jsonify(updated_order)
return jsonify({"message": "Order not found"}), 404

@bp.route('/<id>', methods=['DELETE'])
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Suggested change
@bp.route('/<id>', methods=['DELETE'])
with tracer.start_as_current_span("delete_order") as span:
logger.info(f"Deleting order with ID: {id}")
span.set_attribute("http.method", "DELETE")
span.set_attribute("endpoint", f"/orders/{id}")
span.set_attribute("order.id", id)
try:
result = delete_order_by_id(id)
if result:
logger.info(f"Order deleted successfully: {id}")
# Track order deletion event
amplitude.track({
"event_type": "order_deleted",
"event_properties": {
"order_id": id
}
})
return jsonify({"message": "Order deleted"})
logger.warning(f"Order not found for deletion with ID: {id}")
span.set_attribute("order.found", False)
return jsonify({"message": "Order not found"}), 404
except Exception as e:
logger.error(f"Error deleting order {id}: {str(e)}")
span.set_status(trace.StatusCode.ERROR, str(e))
return jsonify({"error": "Failed to delete order"}), 500
@@ -0,0 +1,44 @@
# routes/product_routes.py
from flask import Blueprint, jsonify, request
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from flask import Blueprint, jsonify, request
import logging
from opentelemetry import trace
import amplitude
tracer = trace.get_tracer(__name__)
logger = logging.getLogger(__name__)
bp = Blueprint('product', __name__, url_prefix='/products')

@bp.route('/', methods=['GET'])
def list_products():
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def list_products():
with tracer.start_as_current_span("list_products") as span:
logger.info("Retrieving product list")
span.set_attribute("http.method", "GET")
span.set_attribute("endpoint", "/products/")
try:
products = get_products()
span.set_attribute("products.count", len(products))
logger.info(f"Retrieved {len(products)} products")
return jsonify(products)
except Exception as e:
logger.error(f"Error retrieving products: {str(e)}")
span.set_status(trace.StatusCode.ERROR, str(e))
return jsonify({"error": "Failed to retrieve products"}), 500
return jsonify(get_products())

@bp.route('/<id>', methods=['GET'])
def get_product_by_id(id):
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def get_product_by_id(id):
with tracer.start_as_current_span("get_product") as span:
logger.info(f"Retrieving product with ID: {id}")
span.set_attribute("http.method", "GET")
span.set_attribute("endpoint", f"/products/{id}")
span.set_attribute("product.id", id)
try:
product = get_product(id)
if product:
logger.info(f"Product found: {product}")
return jsonify(product)
logger.warning(f"Product not found with ID: {id}")
span.set_attribute("product.found", False)
return jsonify({'message': 'Product not found'}), 404
except Exception as e:
logger.error(f"Error retrieving product {id}: {str(e)}")
span.set_status(trace.StatusCode.ERROR, str(e))
return jsonify({"error": "Failed to retrieve product"}), 500
return jsonify({'message': 'Product not found'}), 404

@bp.route('/', methods=['POST'])
def add_product():
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def add_product():
with tracer.start_as_current_span("create_product") as span:
logger.info("Processing product creation request")
span.set_attribute("http.method", "POST")
span.set_attribute("endpoint", "/products/")
try:
data = request.get_json()
span.set_attribute("product.data", str(data))
product = create_product(data)
# Track product creation event
amplitude.track({
"event_type": "product_created",
"event_properties": {
"product_id": product.get("id", "unknown"),
"product_name": data.get("name", "unknown")
}
})
logger.info(f"Product created successfully: {product}")
return jsonify(product), 201
except Exception as e:
logger.error(f"Error creating product: {str(e)}")
span.set_status(trace.StatusCode.ERROR, str(e))
return jsonify({"error": "Failed to create product"}), 500
@@ -0,0 +1,38 @@
from flask import Blueprint, request, jsonify
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from flask import Blueprint, request, jsonify
import logging
from opentelemetry import trace
import amplitude
tracer = trace.get_tracer(__name__)
logger = logging.getLogger(__name__)
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Dashboard Suggestion: Flask API Service Overview

Type: grafana
Priority: High

Queries

[ { "refId": "A", "datasource": "Prometheus", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\"}[5m])) by (route)", "legendFormat": "{{route}}", "interval": "30s" }, { "refId": "B", "datasource": "Prometheus", "expr": "histogram_quantile(0.95, sum(rate(http_server_duration_seconds_bucket{service_name=\"flask-app\"}[5m])) by (route, le))", "legendFormat": "p95 {{route}}", "interval": "30s" }, { "refId": "C", "datasource": "Prometheus", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", status_code=~\"5..\"}[5m])) by (route) / sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\"}[5m])) by (route)", "legendFormat": "Error % {{route}}", "interval": "30s" } ] 

Panels

[ { "title": "Request Rate by Endpoint", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 }, "targets": ["A"] }, { "title": "p95 Latency by Endpoint", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 }, "targets": ["B"] }, { "title": "Error Rate by Endpoint", "type": "timeseries", "gridPos": { "h": 8, "w": 24, "x": 0, "y": 8 }, "targets": ["C"] } ] 

Alerts

[ { "name": "High Error Rate", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", status_code=~\"5..\"}[5m])) / sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\"}[5m])) > 0.05", "for": "5m", "severity": "warning" }, { "name": "High Latency", "expr": "histogram_quantile(0.95, sum(rate(http_server_duration_seconds_bucket{service_name=\"flask-app\"}[5m])) by (le)) > 1", "for": "5m", "severity": "warning" } ] 
Click to create this dashboard

To create this dashboard, comment with:

prism dashboard --create Flask API Service Overview

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Dashboard Suggestion: E-commerce Business Metrics

Type: grafana
Priority: Medium

Queries

[ { "refId": "A", "datasource": "Prometheus", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=\"/orders/create\", status_code=~\"2..\"}[5m]))", "legendFormat": "Order Creation Rate", "interval": "30s" }, { "refId": "B", "datasource": "Prometheus", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=\"/refund\", http_method=\"POST\", status_code=~\"2..\"}[5m]))", "legendFormat": "Refund Rate", "interval": "30s" }, { "refId": "C", "datasource": "Prometheus", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=\"/products/search\", status_code=~\"2..\"}[5m]))", "legendFormat": "Product Search Rate", "interval": "30s" } ] 

Panels

[ { "title": "Order Creation Rate", "type": "timeseries", "gridPos": { "h": 8, "w": 8, "x": 0, "y": 0 }, "targets": ["A"] }, { "title": "Refund Rate", "type": "timeseries", "gridPos": { "h": 8, "w": 8, "x": 8, "y": 0 }, "targets": ["B"] }, { "title": "Product Search Rate", "type": "timeseries", "gridPos": { "h": 8, "w": 8, "x": 16, "y": 0 }, "targets": ["C"] } ] 

Alerts

[ { "name": "Order Creation Drop", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=\"/orders/create\", status_code=~\"2..\"}[30m])) < sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=\"/orders/create\", status_code=~\"2..\"}[30m] offset 1d)) * 0.5", "for": "15m", "severity": "warning" } ] 
Click to create this dashboard

To create this dashboard, comment with:

prism dashboard --create E-commerce Business Metrics

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Dashboard Suggestion: Payment Services Performance

Type: grafana
Priority: High

Queries

[ { "refId": "A", "datasource": "Prometheus", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=~\"/remittance/.*\"}[5m])) by (route)", "legendFormat": "{{route}}", "interval": "30s" }, { "refId": "B", "datasource": "Prometheus", "expr": "histogram_quantile(0.95, sum(rate(http_server_duration_seconds_bucket{service_name=\"flask-app\", route=~\"/remittance/.*\"}[5m])) by (route, le))", "legendFormat": "p95 {{route}}", "interval": "30s" }, { "refId": "C", "datasource": "Prometheus", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=~\"/refund/.*\"}[5m])) by (route)", "legendFormat": "{{route}}", "interval": "30s" }, { "refId": "D", "datasource": "Prometheus", "expr": "histogram_quantile(0.95, sum(rate(http_server_duration_seconds_bucket{service_name=\"flask-app\", route=~\"/refund/.*\"}[5m])) by (route, le))", "legendFormat": "p95 {{route}}", "interval": "30s" } ] 

Panels

[ { "title": "Remittance Request Rate", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 }, "targets": ["A"] }, { "title": "Remittance Latency (p95)", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 }, "targets": ["B"] }, { "title": "Refund Request Rate", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 }, "targets": ["C"] }, { "title": "Refund Latency (p95)", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 12, "y": 8 }, "targets": ["D"] } ] 

Alerts

[ { "name": "Slow Remittance Processing", "expr": "histogram_quantile(0.95, sum(rate(http_server_duration_seconds_bucket{service_name=\"flask-app\", route=\"/remittance/send\"}[5m])) by (le)) > 2", "for": "5m", "severity": "warning" }, { "name": "Refund Service Errors", "expr": "sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=~\"/refund/.*\", status_code=~\"5..\"}[5m])) / sum(rate(http_server_duration_seconds_count{service_name=\"flask-app\", route=~\"/refund/.*\"}[5m])) > 0.05", "for": "5m", "severity": "warning" } ] 
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prism dashboard --create Payment Services Performance

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Dashboard Suggestion: Flask Application Overview

Type: datadog
Priority: High

Queries

[ { "refId": "A", "datasource": "Datadog", "query": "sum:trace.http.server.duration.by.resource_name{service:flask-app}.as_count().rollup(sum, 60)", "aggregator": "sum", "alias": "Request Count by Endpoint" }, { "refId": "B", "datasource": "Datadog", "query": "p95:trace.http.server.duration{service:flask-app} by {resource_name}", "aggregator": "avg", "alias": "p95 Latency by Endpoint" }, { "refId": "C", "datasource": "Datadog", "query": "sum:trace.http.server.duration.by.resource_name{service:flask-app,http.status_code:5xx}.as_count().rollup(sum, 60) / sum:trace.http.server.duration.by.resource_name{service:flask-app}.as_count().rollup(sum, 60) * 100", "aggregator": "avg", "alias": "Error Rate %" } ] 

Panels

[ { "title": "Request Volume by Endpoint", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 }, "targets": ["A"] }, { "title": "p95 Latency by Endpoint", "type": "timeseries", "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 }, "targets": ["B"] }, { "title": "Error Rate %", "type": "timeseries", "gridPos": { "h": 8, "w": 24, "x": 0, "y": 8 }, "targets": ["C"] } ] 

Alerts

[ { "name": "High API Error Rate", "query": "sum:trace.http.server.duration.by.resource_name{service:flask-app,http.status_code:5xx}.as_count().rollup(sum, 300) / sum:trace.http.server.duration.by.resource_name{service:flask-app}.as_count().rollup(sum, 300) * 100 > 5", "warning_threshold": 3, "critical_threshold": 5, "notify_no_data": false, "require_full_window": false }, { "name": "High API Latency", "query": "avg:trace.http.server.duration{service:flask-app} by {resource_name} > 1", "warning_threshold": 0.5, "critical_threshold": 1, "notify_no_data": false, "require_full_window": false } ] 
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prism dashboard --create Flask Application Overview

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Create All Dashboards

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prism dashboard --create-all

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Alert Suggestion: HighErrorRateAcrossAPIs

Type: metric
Priority: P0

Query

sum(rate(http_server_duration_count{status_code=~"5.."}[5m])) / sum(rate(http_server_duration_count[5m])) > 0.05

Description

High rate of 5xx errors across all API endpoints

Threshold

5%

Duration

5m

Notification

slack-sre-channel

Runbook

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prism alert --create HighErrorRateAcrossAPIs

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Alert Suggestion: APILatencySpike

Type: metric
Priority: P1

Query

histogram_quantile(0.95, sum by(le, route) (rate(http_server_duration_bucket[5m]))) > 1.0

Description

95th percentile latency for API endpoints is above 1 second

Threshold

1.0 seconds

Duration

5m

Notification

slack-sre-channel

Runbook

Link to Runbook

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prism alert --create APILatencySpike

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Alert Suggestion: HighNotFoundRate

Type: metric
Priority: P2

Query

sum(rate(http_server_duration_count{status_code="404"}[5m])) / sum(rate(http_server_duration_count[5m])) > 0.10

Description

Unusually high rate of 404 responses, may indicate client issues or missing resources

Threshold

10%

Duration

5m

Notification

slack-sre-channel

Runbook

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prism alert --create HighNotFoundRate

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Alert Suggestion: RefundAPIErrorRate

Type: metric
Priority: P1

Query

sum(rate(http_server_duration_count{route=~"/refund.*", status_code=~"5.."}[5m])) / sum(rate(http_server_duration_count{route=~"/refund.*"}[5m])) > 0.03

Description

Refund API is experiencing a high error rate

Threshold

3%

Duration

5m

Notification

slack-payments-team

Runbook

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prism alert --create RefundAPIErrorRate

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Alert Suggestion: RemittanceProcessingLatency

Type: metric
Priority: P1

Query

histogram_quantile(0.95, sum by(le) (rate(http_server_duration_bucket{route="/remittance/send"}[5m]))) > 2.0

Description

Remittance processing is taking longer than expected

Threshold

2.0 seconds

Duration

5m

Notification

slack-payments-team

Runbook

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prism alert --create RemittanceProcessingLatency

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Alert Suggestion: CriticalApplicationErrors

Type: log
Priority: P0

Query

{app="flask-app"} |= "ERROR" | json | level="error" | count() > 10

Description

High number of error-level log entries

Threshold

10 errors

Duration

5m

Notification

slack-sre-channel

Runbook

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prism alert --create CriticalApplicationErrors

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Alert Suggestion: PaymentProcessingFailures

Type: log
Priority: P0

Query

{app="flask-app"} |= "ERROR" |= "payment" | json | count() > 5

Description

Multiple payment processing failures detected

Threshold

5 errors

Duration

5m

Notification

slack-payments-team

Runbook

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prism alert --create PaymentProcessingFailures

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Alert Suggestion: BadRequestSpike

Type: log
Priority: P2

Query

{app="flask-app"} |= "400 Bad Request" | json | count() > 50

Description

Unusual spike in bad requests, may indicate client integration issues

Threshold

50 bad requests

Duration

5m

Notification

slack-api-team

Runbook

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prism alert --create BadRequestSpike

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Create All Alerts

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prism alert --create-all

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prism check

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The PR introduces a new Python Flask application with multiple endpoints but lacks proper observability. My recommendations focus on:

  1. HIGH PRIORITY: Add OpenTelemetry tracing to all route handlers to track request flow and performance
  2. HIGH PRIORITY: Add structured logging for errors and important operations
  3. MEDIUM PRIORITY: Implement metrics for endpoint latency and error rates
  4. MEDIUM PRIORITY: Add event tracking for key user actions like order creation and refunds
  5. LOW PRIORITY: Add debug logging for complex operations

These changes will provide visibility into application performance, error conditions, and user behavior, replacing the alerting rules that were removed in the PR.

@@ -0,0 +1,16 @@
# app.py
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Suggested change
# app.py
import logging
from flask import Flask, request
from opentelemetry import trace
from opentelemetry.instrumentation.flask import FlaskInstrumentor
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor
from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
# Configure logging
logging.basicConfig(
level=logging.INFO,
format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)
# Configure OpenTelemetry
trace.set_tracer_provider(TracerProvider())
tracer = trace.get_tracer(__name__)
span_processor = BatchSpanProcessor(OTLPSpanExporter())
trace.get_tracer_provider().add_span_processor(span_processor)
# Initialize Flask instrumentation
FlaskInstrumentor().instrument_app(app)
logger.info("Initializing Flask application")
@app.before_request
def before_request():
request_id = request.headers.get('X-Request-ID')
if request_id:
trace.get_current_span().set_attribute("request_id", request_id)
logger.debug(f"Processing request: {request.method} {request.path}")
@app.after_request
def after_request(response):
logger.debug(f"Request completed with status: {response.status_code}")
return response
logger.info("Starting Flask application")
@@ -0,0 +1,31 @@
# routes/order_routes.py
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# routes/order_routes.py
import logging
import time
import json
from opentelemetry import trace
logger = logging.getLogger(__name__)
tracer = trace.get_tracer(__name__)
with tracer.start_as_current_span("create_order") as span:
start_time = time.time()
logger.info("Processing order creation request")
span.set_attribute("http.method", "POST")
span.set_attribute("endpoint", "/orders/create")
try:
data = request.json
span.set_attribute("order.data", json.dumps(data))
result = create_order(data)
# Track order creation event
# amplitude.track(
# event_type="Order Created",
# event_properties={
# "order_data": data,
# "processing_time": time.time() - start_time
# }
# )
logger.info(f"Order created successfully: {result}")
return jsonify(result)
except Exception as e:
span.record_exception(e)
span.set_status(trace.Status(trace.StatusCode.ERROR))
logger.error(f"Error creating order: {str(e)}", exc_info=True)
return jsonify({"error": "Failed to create order"}), 500
with tracer.start_as_current_span("get_order") as span:
span.set_attribute("http.method", "GET")
span.set_attribute("endpoint", f"/orders/{id}")
span.set_attribute("order.id", id)
logger.info(f"Retrieving order with ID: {id}")
try:
order = get_order_by_id(id)
if order:
logger.info(f"Order found: {id}")
return jsonify(order)
logger.warning(f"Order not found: {id}")
span.set_attribute("order.found", False)
return jsonify({"message": "Order not found"}), 404
except Exception as e:
span.record_exception(e)
span.set_status(trace.Status(trace.StatusCode.ERROR))
logger.error(f"Error retrieving order {id}: {str(e)}", exc_info=True)
return jsonify({"error": "Failed to retrieve order"}), 500
with tracer.start_as_current_span("update_order") as span:
start_time = time.time()
span.set_attribute("http.method", "PUT")
span.set_attribute("endpoint", f"/orders/{id}")
span.set_attribute("order.id", id)
logger.info(f"Updating order with ID: {id}")
try:
data = request.json
span.set_attribute("order.update_data", json.dumps(data))
updated_order = update_order_by_id(id, data)
if updated_order:
# Track order update event
# amplitude.track(
# event_type="Order Updated",
# event_properties={
# "order_id": id,
# "update_data": data,
# "processing_time": time.time() - start_time
# }
# )
logger.info(f"Order updated successfully: {id}")
return jsonify(updated_order)
logger.warning(f"Order not found for update: {id}")
span.set_attribute("order.found", False)
return jsonify({"message": "Order not found"}), 404
except Exception as e:
span.record_exception(e)
span.set_status(trace.Status(trace.StatusCode.ERROR))
logger.error(f"Error updating order {id}: {str(e)}", exc_info=True)
return jsonify({"error": "Failed to update order"}), 500
with tracer.start_as_current_span("delete_order") as span:
span.set_attribute("http.method", "DELETE")
span.set_attribute("endpoint", f"/orders/{id}")
span.set_attribute("order.id", id)
logger.info(f"Deleting order with ID: {id}")
try:
result = delete_order_by_id(id)
if result:
# Track order deletion event
# amplitude.track(
# event_type="Order Deleted",
# event_properties={"order_id": id}
# )
logger.info(f"Order deleted successfully: {id}")
return jsonify({"message": "Order deleted"})
logger.warning(f"Order not found for deletion: {id}")
span.set_attribute("order.found", False)
return jsonify({"message": "Order not found"}), 404
except Exception as e:
span.record_exception(e)
span.set_status(trace.Status(trace.StatusCode.ERROR))
logger.error(f"Error deleting order {id}: {str(e)}", exc_info=True)
return jsonify({"error": "Failed to delete order"}), 500
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prism alert --create RefundAPIErrorRate

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✅ Successfully created alert!

@SkySingh04
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prism dashboard --create Payment Services Performance

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✅ Successfully created dashboard!

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