How to create an alert for AWS load balancer 'outofservice'?

There are multiple ways to create an alert for an out-of-service status for an AWS Load Balancer, but one possible method is to use Amazon CloudWatch Alarms.

• Here are the steps of the process:
• Open the Amazon CloudWatch console.
• In the navigation pane, choose Alarms, and then choose to Create alarm.
• In the Alarm details section, enter a name and description for the alarm.
• In the Alarm settings section, choose the LoadBalancer metric, and then choose the appropriate load balancer from the drop-down list.
• In the Conditions section, choose the OutOfService metric, and set the threshold for the alarm. This is the value that when crossed will trigger the alarm.
• In the Actions section, choose the SNS topic or any other action that you want to trigger when the alarm goes into the alarm state.

Once you have set up the alarm, it will monitor the status of your load balancer, and if the number of out-of-service instances exceeds the threshold you set, the alarm will trigger and take the specified actions.