Spring Boot + ECS + Fargate

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Integration between Spring Boot and AWS Elastic Container Service (Fargate)

Config Docker

Build Image

docker build -t digimonapi:latest "."

Run Container using image created

docker run -d -p 80:80 -t digimonapi:latest

Cloudformation

Use file template.yml to create that resources:

• Cluster
• TaskDefinition
• Service
• Security Group
• Load Balancer
• CloudWatch

Service:
  Type: "AWS::ECS::Service"
  Properties:
    ServiceName: !Sub service-${FeatureName}-${MicroServiceName}
    <...>
    CapacityProviderStrategy:
      - CapacityProvider: FARGATE_SPOT
        Weight: 5
      - CapacityProvider: FARGATE
        Weight: 1
    <...>

AutoScaling

Config AutoScaling to scale up and down the service. Use template.yml to create that resources:

ScalableTarget:
  Type: AWS::ApplicationAutoScaling::ScalableTarget
  DependsOn: Service
  Properties:
    MinCapacity: 2
    MaxCapacity: 6
    ResourceId: !Join
      - "/"
      - - service
        - !Ref EcsClusterName
        - !GetAtt Service.Name
    RoleARN: !GetAtt AutoScalingRole.Arn
    ScalableDimension: ecs:service:DesiredCount
    ServiceNamespace: ecs

ScalingPolicy:
  Type: AWS::ApplicationAutoScaling::ScalingPolicy
  Properties:
    PolicyName: !Sub "${FeatureName}-auto-scaling-policy"
    PolicyType: TargetTrackingScaling
    ScalingTargetId: !Ref ScalableTarget
    TargetTrackingScalingPolicyConfiguration:
      PredefinedMetricSpecification:
        PredefinedMetricType: ECSServiceAverageCPUUtilization
      TargetValue: 30.0

It's configured to scale up and down the service when the CPU usage is greater than 30%.

Scheduled Scaling

Config Scheduled Scaling to scale up and down the service. Use template.yml to create that resources:

ScalableTarget:
  <...>
  ScheduledActions:
    - ScalableTargetAction:
        MinCapacity: 0
        MaxCapacity: 0
      Schedule: 'cron(0 0 22 ? * MON-FRI)'
      ScheduledActionName: scale-down
    - ScalableTargetAction:
        MinCapacity: 2
        MaxCapacity: 6
      Schedule: 'cron(0 0 11 ? * MON-FRI)'
      ScheduledActionName: scale-up

Articles

These are my articles about ECS Fargate using Spot instance and AutoScaling with ECS.

• Utilizando AWS Fargate Spot para economizar até 70% em aplicações ECS
• Estratégias utilizando Application Auto Scaling com ECS

CodeBuild Notes

• Add ECR permissions to codeBuild.
• Error - "You have reached your pull rate limit"
  • Use: ECR Public Repository

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Developed by Jean Jacques Barros