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‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/.gitignore‎ renamed to ‎Monitoring-Debugging/CloudWatch-Custom-Metrics/.gitignore‎

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.aws-sam
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packaged.yaml
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shopping-cart-app/.aws-sam
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shopping-cart-app/packaged.yaml
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results.bin
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# Created by https://www.gitignore.io/api/osx,linux,python,windows,pycharm,visualstudiocode
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‎Monitoring-Debugging/CloudWatch-Custom-Metrics/README.md‎

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## Locate API Gateway Endpoint URLs
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1. Open the AWS CloudFormation console at [https://console\.aws\.amazon\.com/cloudformation](https://console.aws.amazon.com/cloudformation/)\.
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1. Open the AWS CloudFormation console at <https://console.aws.amazon.com/cloudformation>.
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1. Choose the AWS CloudFormation stack that you created in the preceding step from the list shown\.
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1. Under **Outputs**, note the API Gateway endpoint URLs.
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1. Browse each and observe the JSON responses.
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## Generate Traffic
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Using the API Gateway endpoint URLs in the previous step, generate load against each of these endpoints.
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Using the API Gateway endpoint URLs in the previous step, generate traffic against each of these endpoints.
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Run an HTTP testing tool like [vegeta](https://github.com/tsenart/vegeta) to generate traffic to your API gateway endpoints:
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Modify `URLs.txt` to use the endpoint URLs in your account.
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Run [Apache Bench](http://httpd.apache.org/docs/2.4/programs/ab.html) using [parallel](http://www.gnu.org/software/parallel/):
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Run a test for 60 minutes:
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```sh
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cat URLs.txt | parallel 'ab -c 350 -n 20000 {}'
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cat URLS.txt | vegeta attack -duration=60m | tee results.bin | vegeta report
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```
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## View Custom Metrics
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## View Custom Metrics
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You may view custom metric data while a load test is in progress.
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1. Open the CloudWatch console at <https://console.aws.amazon.com/cloudwatch>.
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1. Navigate to **Metrics**.
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1. Under **All metrics**, select **ShoppingCartApp**.
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1. Select **Metrics with no dimensions**.
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1. Select **ItemsAddedToCart**, **OrderTotal**, and **ViewProduct**.

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/URLs.txt‎

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GET https://q4mss37szc.execute-api.us-east-2.amazonaws.com/Prod/cart/add
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GET https://q4mss37szc.execute-api.us-east-2.amazonaws.com/Prod/cart/purchase
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GET https://q4mss37szc.execute-api.us-east-2.amazonaws.com/Prod/products/123456

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/add_to_cart/app.py‎

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import json
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import random
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import boto3
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cloudwatch = boto3.client('cloudwatch')
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def lambda_handler(event, context):
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cloudwatch.put_metric_data(
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MetricData=[
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{
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'MetricName': 'ItemsAddedToCart',
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'Value': random.randint(1, 20)
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},
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],
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Namespace='ShoppingCartApp'
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)
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return {
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"statusCode": 200,
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"body": json.dumps(
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[
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{"itemID": "123456"},
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{"itemID": "234567"},
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{"itemID": "345678"}
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]
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),
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}

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/add_to_cart/requirements.txt‎

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boto3

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/purchase/app.py‎

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import json
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import decimal
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import random
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import boto3
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cloudwatch = boto3.client('cloudwatch')
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def lambda_handler(event, context):
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cloudwatch.put_metric_data(
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MetricData=[
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{
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'MetricName': 'OrderTotal',
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'Value': decimal.Decimal(random.randrange(100, 50000))/100
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},
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],
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Namespace='ShoppingCartApp'
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)
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return {
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"statusCode": 200,
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"body": json.dumps({
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"OrderID": "123456",
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"OrderTotal": "543.21",
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}),
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}

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/purchase/requirements.txt‎

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boto3

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/template.yaml‎

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AWSTemplateFormatVersion: '2010-09-09'
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Transform: AWS::Serverless-2016-10-31
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Description: Shopping cart app
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Globals:
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Function:
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Handler: app.lambda_handler
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Runtime: python3.7
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Tracing: Active
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Timeout: 3
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Resources:
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AddToCartFunction:
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Type: AWS::Serverless::Function
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Properties:
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CodeUri: add_to_cart/
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Events:
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AddToCart:
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Type: Api
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Properties:
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Path: /cart/add
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Method: get
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Policies:
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- Statement:
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- Sid: CloudWatchPutMetricDataPolicy
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Effect: Allow
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Action:
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- cloudwatch:PutMetricData
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Resource: '*'
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PurchaseFunction:
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Type: AWS::Serverless::Function
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Properties:
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CodeUri: purchase/
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Events:
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Purchase:
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Type: Api
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Properties:
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Path: /cart/purchase
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Method: get
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Policies:
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- Statement:
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- Sid: CloudWatchPutMetricDataPolicy
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Effect: Allow
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Action:
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- cloudwatch:PutMetricData
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Resource: '*'
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ViewProductFunction:
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Type: AWS::Serverless::Function
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Properties:
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CodeUri: view_product/
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Events:
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ViewProduct:
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Type: Api
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Properties:
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Path: /products/123456
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Method: get
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Policies:
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- Statement:
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- Sid: CloudWatchPutMetricDataPolicy
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Effect: Allow
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Action:
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- cloudwatch:PutMetricData
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Resource: '*'
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Outputs:
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AddToCartApi:
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Description: "API Gateway endpoint URL for Prod stage for AddToCart function"
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Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/cart/add"
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AddToCartFunction:
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Description: "AddToCart Lambda Function ARN"
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Value: !GetAtt AddToCartFunction.Arn
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AddToCartFunctionIamRole:
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Description: "Implicit IAM Role created for AddToCart function"
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Value: !GetAtt AddToCartFunctionRole.Arn
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PurchaseApi:
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Description: "API Gateway endpoint URL for Prod stage for Purchase function"
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Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/cart/purchase"
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PurchaseFunction:
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Description: "Purchase Lambda Function ARN"
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Value: !GetAtt PurchaseFunction.Arn
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PurchaseFunctionIamRole:
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Description: "Implicit IAM Role created for Purchase function"
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Value: !GetAtt PurchaseFunctionRole.Arn
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ViewProductApi:
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Description: "API Gateway endpoint URL for Prod stage for ViewProduct function"
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Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/products/123456"
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ViewProductFunction:
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Description: "ViewProduct Lambda Function ARN"
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Value: !GetAtt ViewProductFunction.Arn
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ViewProductFunctionIamRole:
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Description: "Implicit IAM Role created for ViewProduct function"
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Value: !GetAtt ViewProductFunctionRole.Arn

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/view_product/app.py‎

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import json
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import boto3
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cloudwatch = boto3.client('cloudwatch')
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def lambda_handler(event, context):
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cloudwatch.put_metric_data(
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MetricData=[
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{
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'MetricName': 'ViewProduct',
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'Value': 1
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},
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],
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Namespace='ShoppingCartApp'
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)
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return {
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"statusCode": 200,
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"body": json.dumps({
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"ProductID": "123456",
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}),
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}

‎Monitoring-Debugging/CloudWatch-Custom-Metrics/shopping-cart-app/view_product/requirements.txt‎

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boto3

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