spot-nodes.yaml

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'Amazon EKS - Node Group - Released 2018-08-30'

Parameters:

  KeyName:
    Description: The EC2 Key Pair to allow SSH access to the instances
    Type: AWS::EC2::KeyPair::KeyName
    Default: townsenddw

  NodeImageId:
    Type: AWS::EC2::Image::Id
    Description: AMI id for the node instances.
    Default: ami-0a54c984b9f908c81

  NodeInstanceType:
    Description: EC2 instance type for the node instances
    Type: String
    Default: m5.large
    AllowedValues:
    - t2.small
    - t2.medium
    - t2.large
    - t2.xlarge
    - t2.2xlarge
    - m3.medium
    - m3.large
    - m3.xlarge
    - m3.2xlarge
    - m4.large
    - m4.xlarge
    - m4.2xlarge
    - m4.4xlarge
    - m4.10xlarge
    - m5.large
    - m5.xlarge
    - m5.2xlarge
    - m5.4xlarge
    - m5.12xlarge
    - m5.24xlarge
    - c4.large
    - c4.xlarge
    - c4.2xlarge
    - c4.4xlarge
    - c4.8xlarge
    - c5.large
    - c5.xlarge
    - c5.2xlarge
    - c5.4xlarge
    - c5.9xlarge
    - c5.18xlarge
    - i3.large
    - i3.xlarge
    - i3.2xlarge
    - i3.4xlarge
    - i3.8xlarge
    - i3.16xlarge
    - r3.xlarge
    - r3.2xlarge
    - r3.4xlarge
    - r3.8xlarge
    - r4.large
    - r4.xlarge
    - r4.2xlarge
    - r4.4xlarge
    - r4.8xlarge
    - r4.16xlarge
    - x1.16xlarge
    - x1.32xlarge
    - p2.xlarge
    - p2.8xlarge
    - p2.16xlarge
    - p3.2xlarge
    - p3.8xlarge
    - p3.16xlarge
    ConstraintDescription: Must be a valid EC2 instance type

  NodeAutoScalingGroupMinSize:
    Type: Number
    Description: Minimum size of Node Group ASG.
    Default: 0

  NodeAutoScalingGroupMaxSize:
    Type: Number
    Description: Maximum size of Node Group ASG.
    Default: 1

  NodeVolumeSize:
    Type: Number
    Description: Node volume size
    Default: 100

  ClusterName:
    Description: The cluster name provided when the cluster was created. If it is incorrect, nodes will not be able to join the cluster.
    Type: String

  BootstrapArguments:
    Description: Arguments to pass to the bootstrap script. See files/bootstrap.sh in https://github.com/awslabs/amazon-eks-ami
    Default: ""
    Type: String

  NodeGroupName:
    Description: Unique identifier for the Node Group.
    Default: "spot"
    Type: String

  Subnets:
    Description: The subnets where workers can be created.
    Type: List<AWS::EC2::Subnet::Id>

  NodeInstanceProfile:
    Description: The InstanceProfile created by the default template
    Type: String
  
  NodeInstanceRole:
    Description: The Instance role created by the default template
    Type: String

  NodeSecurityGroup:
    Description: The security group of the spot worker nodes
    Type: AWS::EC2::SecurityGroup::Id

Resources:

  NodeGroup:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      DesiredCapacity: !Ref NodeAutoScalingGroupMaxSize
      LaunchConfigurationName: !Ref NodeLaunchConfig
      MinSize: !Ref NodeAutoScalingGroupMinSize
      MaxSize: !Ref NodeAutoScalingGroupMaxSize
      VPCZoneIdentifier:
        !Ref Subnets
      Tags:
      - Key: Name
        Value: !Sub "${ClusterName}-${NodeGroupName}-Node"
        PropagateAtLaunch: 'true'
      - Key: !Sub 'kubernetes.io/cluster/${ClusterName}'
        Value: 'owned'
        PropagateAtLaunch: 'true'
    UpdatePolicy:
      AutoScalingRollingUpdate:
        MinInstancesInService: '1'
        MaxBatchSize: '1'

  NodeLaunchConfig:
    Type: AWS::AutoScaling::LaunchConfiguration
    Properties:
      AssociatePublicIpAddress: 'true'
      IamInstanceProfile: !Ref NodeInstanceProfile
      ImageId: !Ref NodeImageId
      InstanceType: !Ref NodeInstanceType
      KeyName: !Ref KeyName
      SecurityGroups:
      - !Ref NodeSecurityGroup
      BlockDeviceMappings:
        - DeviceName: /dev/xvda
          Ebs:
            VolumeSize: !Ref NodeVolumeSize
            VolumeType: gp2
            DeleteOnTermination: true
      SpotPrice: '0.30'
      UserData:
        Fn::Base64:
          !Sub |
            #!/bin/bash
            set -o xtrace
            yum update -y
            yum install amazon-efs-utils -y
            /etc/eks/bootstrap.sh ${ClusterName} ${BootstrapArguments}
            /opt/aws/bin/cfn-signal --exit-code $? \
                     --stack  ${AWS::StackName} \
                     --resource NodeGroup  \
                     --region ${AWS::Region}