CloudWatch-AutoRecover.sh

#!/bin/bash

if [ $# -ne 3 ]; then
    echo "Usage: $0 [AlarmName] [Region] [Profile]"
    echo "Region: ap-northeast-1 ap-southeast-1 ap-southeast-2 eu-central-1 eu-west-1 sa-east-1 us-east-1 us-west-1 us-west-2"
    exit
fi

NAME=$1
METRIC_NAME=StatusCheckFailed_System
NAMESPACE=AWS/EC2
STATISTIC=Maximum
PERIOD=60
EVALUATION_PERIODS=1
THRESHOLD=1
COMPARISON_OPERATOR=GreaterThanOrEqualToThreshold
ALARM_ACTIONS=arn:aws:automate:$2:ec2:recover
AWS="aws --profile $3 --region $2"
INSTANCE_LIST=`${AWS} ec2 describe-instances | jq -r '.Reservations[].Instances[].InstanceId'`
for INSTANCE_ID in $INSTANCE_LIST;
do
        echo $INSTANCE_ID
        ALARM_NAME="$INSTANCE_ID-$NAME"
        $AWS cloudwatch put-metric-alarm \
        --alarm-name $ALARM_NAME \
        --alarm-actions $ALARM_ACTIONS \
        --metric-name $METRIC_NAME \
        --namespace $NAMESPACE \
        --dimensions Name=InstanceId,Value=$INSTANCE_ID \
        --statistic $STATISTIC  \
        --period $PERIOD \
        --evaluation-periods $EVALUATION_PERIODS \
        --threshold $THRESHOLD \
        --comparison-operator $COMPARISON_OPERATOR
done