cloudformation-linux-cloudwatch-alarms

cloudformation-linux-cloudwatch-alarms.yaml

AWSTemplateFormatVersion: '2010-09-09'
Description: Linux CloudWatch Alarms - CPU Memory Instance and System Status
#------------------------------------------------------------------------------
Parameters:
#------------------------------------------------------------------------------
  instanceid:
    Description: "Choose an instance id"
    Type: AWS::EC2::Instance::Id

  instancename:
    Description: "Please provide EC2 instance name"
    Type: "String"
    MinLength: '1'
    MaxLength: '50'

  criticalsnsarn:
    Description: "Please provide an ARN of SNS topic - CRITICAL Type"
    Type: "String"

  warningsnsarn:
    Description: "Please provide an ARN of SNS topic - WARNING Type"
    Type: "String"

#------------------------------------------------------------------------------
Resources:
#------------------------------------------------------------------------------
  CPUAlarmWARNING: 
    Type: AWS::CloudWatch::Alarm
    DeletionPolicy: Retain
    Properties:
      AlarmDescription: !Sub "${instancename} - ${instanceid} - High CPU Usage 90%"
      AlarmActions:
      - !Ref warningsnsarn
      OKActions:
      - !Ref warningsnsarn
      MetricName: CPUUtilization
      Namespace: AWS/EC2
      Statistic: Average
      Period: '900'
      EvaluationPeriods: '1'
      Threshold: '90'
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
      - Name: InstanceId
        Value: !Ref instanceid
#------------------------------------------------------------------------------
  CPUAlarmCRITICAL: 
    Type: AWS::CloudWatch::Alarm
    DeletionPolicy: Retain 
    Properties:
      AlarmDescription: !Sub "${instancename} - ${instanceid} - High CPU Usage 95%"
      AlarmActions:
      - !Ref criticalsnsarn
      OKActions:
      - !Ref criticalsnsarn
      MetricName: CPUUtilization
      Namespace: AWS/EC2
      Statistic: Average
      Period: '900' 
      EvaluationPeriods: '2'
      Threshold: '95'
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
      - Name: InstanceId
        Value: !Ref instanceid
#------------------------------------------------------------------------------
  MemoryAlarmWARNING:
    Type: AWS::CloudWatch::Alarm
    DeletionPolicy: Retain
    Properties:
      AlarmDescription: !Sub "${instancename} - ${instanceid} - High Memory Usage 90%"
      AlarmActions:
      - !Ref warningsnsarn
      OKActions:
      - !Ref warningsnsarn
      MetricName: "mem_used_percent"
      Namespace: CWAgent
      Statistic: Average
      Period: '900'
      EvaluationPeriods: '1'
      Threshold: '90'
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
      - Name: InstanceId
        Value: !Ref instanceid
#------------------------------------------------------------------------------
  MemoryAlarmCRITICAL: 
    Type: AWS::CloudWatch::Alarm
    DeletionPolicy: Retain
    Properties:
      AlarmDescription: !Sub "${instancename} - ${instanceid} - High Memory Usage 95%"
      AlarmActions:
      - !Ref criticalsnsarn
      OKActions:
      - !Ref criticalsnsarn
      MetricName: "mem_used_percent"
      Namespace: CWAgent
      Statistic: Average
      Period: '900' 
      EvaluationPeriods: '2'
      Threshold: '95'
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
      - Name: InstanceId
        Value: !Ref instanceid
#------------------------------------------------------------------------------
  SystemStatusAlarmCRITICAL:
    Type: AWS::CloudWatch::Alarm
    DeletionPolicy: Retain
    Properties:
      AlarmDescription: !Sub "${instancename} - ${instanceid} - instance recovery process has been triggered because of failed System Status Check"
      Namespace: AWS/EC2
      MetricName: StatusCheckFailed_System
      Statistic: Minimum
      Period: '60'
      EvaluationPeriods: '2'
      ComparisonOperator: GreaterThanThreshold
      Threshold: '0'
      AlarmActions:
      - !Sub "arn:aws:automate:${AWS::Region}:ec2:recover"
      - !Ref warningsnsarn
      OKActions:
      - !Ref warningsnsarn
      Dimensions:
      - Name: InstanceId
        Value: !Ref instanceid
#------------------------------------------------------------------------------
  InstanceStatusAlarmCRITICAL: 
    Type: AWS::CloudWatch::Alarm
    DeletionPolicy: Retain
    Properties:
      AlarmDescription: !Sub "${instancename} - ${instanceid} - Instance Status Check Failed - please investigate. Troubleshooting: https://goo.gl/Ea27Gd"
      Namespace: AWS/EC2
      MetricName: StatusCheckFailed_Instance
      Statistic: Minimum
      Period: '60'
      EvaluationPeriods: '3'
      ComparisonOperator: GreaterThanThreshold
      Threshold: '0'
      AlarmActions:
      - !Ref criticalsnsarn
      OKActions:
      - !Ref criticalsnsarn
      Dimensions:
      - Name: InstanceId
        Value: !Ref instanceid
#-----------------------------------------------------------------------------

1. I have 2 instances. How can input as without mentioned instanceid? I did initiate the ec2 instance via ecs launch configuration.
   Can you please assist me