worker_asg.yaml

Description: Tooling Cluster Worker Scaling Group Template
Parameters:
  ClusterName:
    Type: String
  ClusterRegion:
    Type: String
  ClusterApiEndPoint:
    Type: String
  ClusterCAAuth:
    Type: String
  ClusterWorkerName:
    Type: String
  AvailabilityZones:
    Type: CommaDelimitedList
  VPCZoneIdentifier:
    Type: List<AWS::EC2::Subnet::Id>
  MaximumCapacity:
    Type: String
  MinimumCapacity:
    Type: String
  MaxBatchSize:
    Type: String
  UpdatePauseTime:
    Type: String
  NodeInstanceProfile:
    Type: String
  NodeImageId:
    Type: String
  NodeInstanceType:
    Type: String
  NodeSecurityGroup:
    Type: String
  MaxPodsPerNode:
    Type: Number

Resources:
  ClusterWorkerLC:
    Type: AWS::AutoScaling::LaunchConfiguration
    Properties:
      AssociatePublicIpAddress: true
      EbsOptimized: true
      IamInstanceProfile: !Ref NodeInstanceProfile
      ImageId: !Ref NodeImageId
      InstanceType: !Ref NodeInstanceType
      KeyName: 'tools-worker'
      SecurityGroups:
        - !Ref NodeSecurityGroup
      UserData:
        Fn::Base64:
          !Sub |
          #!/bin/bash
          set -o xtrace
          /etc/eks/bootstrap.sh \
              --use-max-pods ${MaxPodsPerNode} \
              --b64-cluster-ca ${ClusterCAAuth} \
              --apiserver-endpoint ${ClusterApiEndPoint} \
              ${ClusterName}

          /opt/aws/bin/cfn-signal --exit-code $? \
                   --stack  ${AWS::StackName} \
                   --resource NodeGroup  \
                   --region ${ClusterRegion}
  ClusterWorkerASG:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      AvailabilityZones: !Ref AvailabilityZones
      LaunchConfigurationName: !Ref ClusterWorkerLC
      MaxSize: !Ref MaximumCapacity
      MinSize: !Ref MinimumCapacity
      DesiredCapacity: !Ref MinimumCapacity
      VPCZoneIdentifier: !Ref VPCZoneIdentifier
      TerminationPolicies:
        - OldestLaunchConfiguration
        - OldestInstance
      HealthCheckType: EC2
      HealthCheckGracePeriod: 300
      LifecycleHookSpecificationList:
        - LifecycleTransition: 'autoscaling:EC2_INSTANCE_TERMINATING'
          LifecycleHookName: 'WorkerNodeDrainingHook'
          HeartbeatTimeout: 300
          DefaultResult: 'CONTINUE'
      Tags:
        - Key: Name
          Value: !Ref ClusterWorkerName
          PropagateAtLaunch: true
        - Key: !Sub kubernetes.io/cluster/${ClusterName}
          Value: owned
          PropagateAtLaunch: true
    UpdatePolicy:
      AutoScalingRollingUpdate:
        MinInstancesInService: !Ref MinimumCapacity
        MaxBatchSize: !Ref MaxBatchSize
        PauseTime: !Ref UpdatePauseTime
Outputs:
  ClusterWorkerASG:
    Description: The Cluster Workers Asg
    Value: !Ref ClusterWorkerASG