all: 
  children:
    cluster:
      children:
        manager:
          hosts:
            manager.omnia.local:
        nfs_node:
          hosts:
            manager.omnia.local:
        login_node:
          hosts:
            login1.omnia.local:
        workers:
          children:
            compute:
              hosts:
                compute001.omnia.local;
                compute002.omnia.local;
                compute003.omnia.local;
                compute004.omnia.local;