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Monitoring — EC2 Auto Scaling Group¶
CloudWatch CPU alarm on an Auto Scaling Group. Uses the AutoScalingGroupName dimension so the alarm follows the group rather than individual instances — survives instance refreshes and scale events.
Requirements¶
No requirements.
Providers¶
| Name | Version |
|---|---|
| aws | n/a |
Modules¶
No modules.
Resources¶
| Name | Type |
|---|---|
| aws_cloudwatch_metric_alarm.cpu | resource |
Inputs¶
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| alarm_actions | List of ARNs to notify on alarm transitions. Typically the PagerDuty SNS topic ARN. | list(string) |
n/a | yes |
| auto_scaling_group_name | Name of the EC2 Auto Scaling Group (the AutoScalingGroupName CloudWatch dimension). | string |
n/a | yes |
| base_tags | Base tags applied to all alarms. | map(string) |
{} |
no |
| cpu_threshold | Trigger when average CPUUtilization across the ASG exceeds this percentage. | number |
80 |
no |
| evaluation_periods | Consecutive periods that must breach for the alarm to fire. | number |
3 |
no |
| period | Period in seconds for each evaluation. | number |
300 |
no |
Outputs¶
No outputs.