CloudWatch - Alert creation problem: EC2 actions are not available for Metric Math monitors.

Question

Trying to create a new Alert based on a CPUUtilization metric with minimum statistics and a period of 1 minute.![Graph](/media/postImages/original/IM5NujwrTvQcCX5SE_cVXuBQ)

The conditions are the following:
Time limit: anomaly detection model.
When CPUUtilization is Major (>).
Anomaly detection limit 5.
![](/media/postImages/original/IMQxnmugjOTtOS-yg0BCu7nw)

Actions
Notification:
When In alarm mode, send notification to "Default_CloudWatch_Alarms_Topic"
EC2 Action:
When In alarm mode, restart this instance (instance ID: )
![](/media/postImages/original/IMOGtOBUrZRLGZ9-F6p7YDvA)

When saving the alarm it throws me the following error:

![Error](/media/postImages/original/IMpgCbLalRQJ2Na1rXhppiIA)

Please if someone can guide me to know what I'm doing wrong

thank you so much

Answer

The graph on the first page appears to have two metrics selected.  
In that case, the EC2 action cannot be set because it may be judged as a formula-based metric.  
Try to have only one metric to select.  
![metric](/media/postImages/original/IMmOcrx1x3SOyP90U1oHIW3w)

CloudWatch - Alert creation problem: EC2 actions are not available for Metric Math monitors.

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