EKS example needs update to VPS subnet IP settings

[geerlingguy]

For more details, see Upcoming Changes to IP Assignment for EKS Managed Node Groups.

It seems like I would just need to add the property MapPublicIpOnLaunch: true to all the subnets in the vpc.yml template:

  Subnet1a:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone:
        Fn::Sub: '${Region}a'
      CidrBlock: 172.16.0.0/18
      # This is the new setting:
      MapPublicIpOnLaunch: true
      Tags:
        - Key: Name
          Value: eks-example-a

[geerlingguy]

Confirmed that this worked out correctly in the end. Will make this update in the next version of the book.