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# Enable autoscaling for the service | |
ScalableTarget: | |
Type: AWS::ApplicationAutoScaling::ScalableTarget | |
DependsOn: Service | |
Properties: | |
ServiceNamespace: 'ecs' | |
ScalableDimension: 'ecs:service:DesiredCount' | |
ResourceId: | |
Fn::Join: | |
- '/' | |
- - service | |
- Fn::ImportValue: !Join [':', [!Ref 'EnvironmentName', 'ClusterName']] | |
- !Ref 'ServiceName' | |
MinCapacity: 2 | |
MaxCapacity: 10 | |
RoleARN: | |
Fn::ImportValue: | |
!Join [':', [!Ref 'EnvironmentName', 'AutoscalingRole']] | |
# Create scaling policies for the service | |
ScaleDownPolicy: | |
Type: AWS::ApplicationAutoScaling::ScalingPolicy | |
DependsOn: ScalableTarget | |
Properties: | |
PolicyName: | |
Fn::Join: | |
- '/' | |
- - scale | |
- !Ref 'EnvironmentName' | |
- !Ref 'ServiceName' | |
- down | |
PolicyType: StepScaling | |
ResourceId: | |
Fn::Join: | |
- '/' | |
- - service | |
- Fn::ImportValue: !Join [':', [!Ref 'EnvironmentName', 'ClusterName']] | |
- !Ref 'ServiceName' | |
ScalableDimension: 'ecs:service:DesiredCount' | |
ServiceNamespace: 'ecs' | |
StepScalingPolicyConfiguration: | |
AdjustmentType: 'ChangeInCapacity' | |
StepAdjustments: | |
- MetricIntervalUpperBound: 0 | |
ScalingAdjustment: -1 | |
MetricAggregationType: 'Average' | |
Cooldown: 60 | |
ScaleUpPolicy: | |
Type: AWS::ApplicationAutoScaling::ScalingPolicy | |
DependsOn: ScalableTarget | |
Properties: | |
PolicyName: | |
Fn::Join: | |
- '/' | |
- - scale | |
- !Ref 'EnvironmentName' | |
- !Ref 'ServiceName' | |
- up | |
PolicyType: StepScaling | |
ResourceId: | |
Fn::Join: | |
- '/' | |
- - service | |
- Fn::ImportValue: !Join [':', [!Ref 'EnvironmentName', 'ClusterName']] | |
- !Ref 'ServiceName' | |
ScalableDimension: 'ecs:service:DesiredCount' | |
ServiceNamespace: 'ecs' | |
StepScalingPolicyConfiguration: | |
AdjustmentType: 'ChangeInCapacity' | |
StepAdjustments: | |
- MetricIntervalLowerBound: 0 | |
MetricIntervalUpperBound: 15 | |
ScalingAdjustment: 1 | |
- MetricIntervalLowerBound: 15 | |
MetricIntervalUpperBound: 25 | |
ScalingAdjustment: 2 | |
- MetricIntervalLowerBound: 25 | |
ScalingAdjustment: 3 | |
MetricAggregationType: 'Average' | |
Cooldown: 60 | |
# Create alarms to trigger these policies | |
LowCpuUsageAlarm: | |
Type: AWS::CloudWatch::Alarm | |
Properties: | |
AlarmName: | |
Fn::Join: | |
- '-' | |
- - low-cpu | |
- !Ref 'EnvironmentName' | |
- !Ref 'ServiceName' | |
AlarmDescription: | |
Fn::Join: | |
- ' ' | |
- - "Low CPU utilization for service" | |
- !Ref 'ServiceName' | |
- "in stack" | |
- !Ref 'EnvironmentName' | |
MetricName: CPUUtilization | |
Namespace: AWS/ECS | |
Dimensions: | |
- Name: ServiceName | |
Value: !Ref 'ServiceName' | |
- Name: ClusterName | |
Value: | |
Fn::ImportValue: !Join [':', [!Ref 'EnvironmentName', 'ClusterName']] | |
Statistic: Average | |
Period: 60 | |
EvaluationPeriods: 1 | |
Threshold: 20 | |
ComparisonOperator: LessThanOrEqualToThreshold | |
AlarmActions: | |
- !Ref ScaleDownPolicy | |
HighCpuUsageAlarm: | |
Type: AWS::CloudWatch::Alarm | |
Properties: | |
AlarmName: | |
Fn::Join: | |
- '-' | |
- - high-cpu | |
- !Ref 'EnvironmentName' | |
- !Ref 'ServiceName' | |
AlarmDescription: | |
Fn::Join: | |
- ' ' | |
- - "High CPU utilization for service" | |
- !Ref 'ServiceName' | |
- "in stack" | |
- !Ref 'EnvironmentName' | |
MetricName: CPUUtilization | |
Namespace: AWS/ECS | |
Dimensions: | |
- Name: ServiceName | |
Value: !Ref 'ServiceName' | |
- Name: ClusterName | |
Value: | |
Fn::ImportValue: !Join [':', [!Ref 'EnvironmentName', 'ClusterName']] | |
Statistic: Average | |
Period: 60 | |
EvaluationPeriods: 1 | |
Threshold: 70 | |
ComparisonOperator: GreaterThanOrEqualToThreshold | |
AlarmActions: | |
- !Ref ScaleUpPolicy |
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