# http://www.graphviz.org/content/cluster

digraph G {
    graph [
        rankdir=LR,
        overlap=false,
        clusterrank=local,
        /*
        splines="polyline"
        */
    ]
    
    subgraph sylowcastle {
        node [shape="record"];    
        "sylow-castle.work" [
            label="sylow-castle.work. |
                 <apex>@ | <in>in. | <iroha>iroha. | <redmine>redmine. | <ringo>ringo. | <sakura>sakura. | <www>www.
            "
        ]
            
        "in.sylow-castle.work" [
            label="<zone>in.sylow-castle.work | 
                <apex>@ | asahi. | <ringo>ringo.
            "
        ]
        
        "sylow-castle.work":in -> "sylow-castle.work":ringo [label="NS", constraint=true]
        "sylow-castle.work":in -> "in.sylow-castle.work":zone [dir="both",arrowhead="dot", arrowtail="dot"]
        "in.sylow-castle.work":apex -> "in.sylow-castle.work":ringo [label=SOA]
    }
    

    
    
    subgraph aws {
        node [shape="record"]        
        "route53" [label="<zone>aws|ns-1995.awsdns53.uk | ns-61.awsdns-07.com | ns-543.awsdns-03.net | ns-1406.awsdns-47.org"];
    }
    
    subgraph sakura_internet {
        node [shape="record"]        
        "sakura" [label="sakura | ns1.dns.ne.jp | ns2.dns.ne.jp | <iroha>153.126.149.204"]
    }

    subgraph ocn {
        node [shape="record"]        
        "153.201.193.83" [label="OCN|153.201.193.83"]
    }
    
    LAN [label="<zone>LAN \n (192.168.0.0/24) | <asahi>192.168.0.21 | <ringo>192.168.0.20" ,shape="record"]
    

    "sylow-castle.work":apex -> "route53":zone [label="NS SOA"]
    "sylow-castle.work":iroha  -> "sakura":iroha [label=A]
    "sylow-castle.work":ringo -> "153.201.193.83"  [label=A]
    "sylow-castle.work":www -> "sakura":iroha [label=A]
    "in.sylow-castle.work":ringo -> "153.201.193.83" [label=A]
    "in.sylow-castle.work":ringo -> LAN:ringo [label=A]
    "in.sylow-castle.work":asahi -> LAN:asahi [label=A]
    "sylow-castle.work":sakura -> "sakura" [label=NS]    

    {sakura,LAN,"153.201.193.83";
        rank=same;}
}