Cloudwatch

List Alarms and Status

aws cloudwatch describe-alarms | jq -r '.MetricAlarms[] | .AlarmName+" "+.Namespace+" "+.StateValue'

backend-autoscale  AWS/EC2             OK
backend-lb         AWS/ApplicationELB  OK
partner-hk         AWS/ECS             ALARM
partner-vn         AWS/ECS             ALARM
partner-sg         AWS/ECS             ALARM
userdata-read      AWS/DynamoDB        OK
userdata-write     AWS/DynamoDB        OK

Create Alarm on High CPUUtilization

aws cloudwatch put-metric-alarm --alarm-name high-cpu-usage --alarm-description "Alarm when CPU exceeds 70 percent" --metric-name CPUUtilization --namespace AWS/EC2 --statistic Average --period 300 --threshold 70 --comparison-operator GreaterThanThreshold  --dimensions "Name=InstanceId,Value=i-123456789" --evaluation-periods 2 --alarm-actions arn:aws:sns:ap-southeast-1:987654321:System-Alerts --unit Percent

Create Alarm on StatusCheckFailed_Instance

aws cloudwatch put-metric-alarm --alarm-name EC2-StatusCheckFailed-AppServer --alarm-description "EC2 StatusCheckFailed for AppServer" --metric-name StatusCheckFailed_Instance --namespace AWS/EC2 --statistic Average --period 60 --threshold 0 --comparison-operator GreaterThanThreshold  --dimensions "Name=InstanceId,Value=i-123456789" --evaluation-periods 3 --alarm-actions arn:aws:sns:ap-southeast-1:987654321:System-Alerts --unit Count