Final answer:
To add a user-defined metric in Amazon CloudWatch, use the PutMetricData API and the AWS CLI.
Step-by-step explanation:
To add a user-defined metric in Amazon CloudWatch, you can use the PutMetricData API, which allows you to publish custom metrics. Here is an example of how to add a user-defined metric using the AWS CLI:
- Open the AWS CLI and run the following command:
aws cloudwatch put-metric-data --namespace your-namespace --metric-name your-metric --value your-value --dimensions key1=value1,key2=value2
Replace your-namespace, your-metric, your-value, key1=value1, and key2=value2 with your desired values.