classDiagram
    CentOS <|-- CoreImage
    CoreImage <|-- CheahaCoreImage
    CheahaCoreImage <|-- OODImage
    CheahaCoreImage <|-- ComputeImage
    ComputeImage <|-- GPUImage
    CoreImage : +Playbook(core-packer.yaml)
    CheahaCoreImage : +Playbook(cheaha-packer.yaml)
    OODImage : +Playbook(ood-packer.yaml)
    ComputeImage : +Playbook(compute-packer.yaml)
    class CentOS{
    }
    class CoreImage{
        +InstallPackage(cheaha-common-yum-pkg-list.txt)
    }
    class CheahaCoreImage{
        +Role(cheaha.node)
    }
    class ComputeImage{
        +InstallPackage(cheaha-compute-yum-pkg-list.txt)
    }
    class GPUImage{
        +Package nvidia
    }
    class OODImage{
        +InstallPackage(cheaha-ood-yum-pkg-list.txt)
    }