136 lines
3.6 KiB
YAML
136 lines
3.6 KiB
YAML
heat_template_version: '2013-05-23'
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description: AWS CloudFormation Sample Template
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parameters:
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InstanceType:
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type: string
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ImageId:
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type: string
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Subnet:
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type: string
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KeyName:
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type: string
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SecurityGroup:
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type: string
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resources:
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CfnUser:
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type: AWS::IAM::User
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AKeys:
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type: AWS::IAM::AccessKey
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properties:
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UserName: {Ref: CfnUser}
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AGroup:
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type: AWS::AutoScaling::AutoScalingGroup
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properties:
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AvailabilityZones: {'Fn::GetAZs': ""}
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LaunchConfigurationName: {Ref: LaunchConfig}
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MinSize: '1'
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MaxSize: '2'
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VPCZoneIdentifier: [{Ref: Subnet}]
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AScaleUpPolicy:
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type: AWS::AutoScaling::ScalingPolicy
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properties:
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AdjustmentType: ChangeInCapacity
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AutoScalingGroupName: {Ref: AGroup}
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Cooldown: '60'
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ScalingAdjustment: '1'
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AScaleDownPolicy:
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type: AWS::AutoScaling::ScalingPolicy
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properties:
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AdjustmentType: ChangeInCapacity
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AutoScalingGroupName: {Ref: AGroup}
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Cooldown: '60'
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ScalingAdjustment: '-1'
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CPUAlarmHigh:
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type: OS::Heat::CWLiteAlarm
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properties:
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AlarmDescription: Scale-up if CPU > 50% for 1 minute
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MetricName: CPUUtilization
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Namespace: system/linux
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Statistic: Average
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Period: '60'
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EvaluationPeriods: '1'
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Threshold: '50'
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AlarmActions:
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- {Ref: AScaleUpPolicy}
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Dimensions:
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- Name: AutoScalingGroupName
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Value: {Ref: AGroup}
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ComparisonOperator: GreaterThanThreshold
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CPUAlarmLow:
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type: OS::Heat::CWLiteAlarm
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properties:
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AlarmDescription: Scale-down if CPU < 30% for 1 minute
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MetricName: CPUUtilization
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Namespace: system/linux
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Statistic: Average
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Period: '60'
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EvaluationPeriods: '1'
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Threshold: '30'
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AlarmActions:
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- {Ref: AScaleDownPolicy}
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Dimensions:
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- Name: AutoScalingGroupName
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Value: {Ref: AGroup}
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ComparisonOperator: LessThanThreshold
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LaunchConfig:
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type: AWS::AutoScaling::LaunchConfiguration
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metadata:
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AWS::CloudFormation::Init:
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config:
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files:
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/etc/cfn/cfn-credentials:
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content:
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Fn::Join:
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- ''
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- - AWSAccessKeyId=
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- {Ref: AKeys}
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- '
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'
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- AWSSecretKey=
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- get_attr: [AKeys, SecretAccessKey]
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- '
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'
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mode: '000400'
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owner: root
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group: root
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/tmp/stats-crontab.txt:
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content:
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Fn::Join:
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- ''
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- - 'MAIL=""
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'
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- '
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'
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- '* * * * * /opt/aws/bin/cfn-push-stats --watch '
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- {Ref: CPUAlarmHigh}
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- ' --cpu-util
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'
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- '* * * * * /opt/aws/bin/cfn-push-stats --watch '
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- {Ref: CPUAlarmLow}
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- ' --cpu-util
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'
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mode: '000600'
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owner: root
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group: root
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properties:
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ImageId: {Ref: ImageId}
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InstanceType: {Ref: InstanceType}
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KeyName: {Ref: KeyName}
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SecurityGroups: [{Ref: SecurityGroup}]
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UserData:
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str_replace:
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template: |
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#!/bin/bash -v
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/opt/aws/bin/cfn-init -s $stack_id -r LaunchConfig
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# install crontab
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crontab /tmp/stats-crontab.txt
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touch /tmp/vm_ready.txt
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params:
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$stack_id: {get_param: "OS::stack_id"}
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