Publishing custom CloudWatch metrics

At this point, we are calculating the appropriate metrics that determine when you need to both scale out or scale in the cluster, and the final task that needs to be performed in the function is to publish custom CloudWatch event metrics, which we can use to trigger auto scaling policies:

......Resources:  ...  ...  EcsCapacityFunction:    Type: AWS::Lambda::Function    DependsOn:      - EcsCapacityLogGroup    Properties:      Role: !Sub ${EcsCapacityRole.Arn}      FunctionName: !Sub ${AWS::StackName}-ecsCapacity      Description: !Sub ${AWS::StackName} ECS Capacity Manager      Code:        ZipFile: |          import json          import boto3          import datetime          ecs = boto3.client('ecs')          cloudwatch = boto3.client('cloudwatch')          # Max memory and CPU - you would typically ...

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