如何生成涉及多个指标的AWS CloudWatch警报

Question

Need to generate CloudWatch Alarm for API Gateway and Lambda functions.

For API Gateway CloudWatch Alarm should be generated if 5XX Error count is 10% of total request count at given period (eg 5 minutes).

Similarly, We need to add a metric if Maximum Latency 6% of total request count > 4 seconds.

For such type of metric looks like we need a combination of metric like Sum of total requests and than need to calculate percentage of errors.

We have Math Expressions/Metric math which might be used. Is there any other way to achieve this?

Any help is appreciated!

Answer 1

EDIT: Its now possible to create alarms on Metric expressions from the CloudWatch Console.

Original Answer below:

Unfortunately its not possible to create alarms based on Metric expressions in CloudWatch. Your best bet may be the M of N thresholds in alarms, for example: If num_of_errors > 5 for 3 datapoints in 5 minutes. Its not exactly what your asking for, but may be a good start. Best of luck!