request-flow.dot

digraph {
    compound=true;
    label="Request Flow";
    labelloc=top;

    visitor[label="Visitor"];
    externallb[label="External LB", shape="rect"];
    visitor -> externallb;
    externallb -> nginx;
    
    developer[label="Developer"];
    builderexternallb[label="Builder External LB", shape="rect"];
    developer -> builderexternallb;
    builderexternallb -> builder;
    
    {rank=same; visitor developer}
    {rank=same; externallb builderexternallb}
    
    
    subgraph cluster_kubernetes {
        label="kubernetes";
        graph[style=dotted];
        nginx[label="Nginx Proxy"];
        
        nginx -> app1[label="host=app1.example.com"];
        nginx -> app2[label="host=app2.example.com"];
        
        subgraph cluster_noelapp {
            label="noelapp namespace";
            app1[label="App 1 Service"];
            app2[label="App 2 Service"];
            podsforapp1[label="App 1 Pods", shape="box3d"];
            podsforapp2[label="App 2 Pods", shape="box3d"];
            app1 -> podsforapp1;
            app2 -> podsforapp2;
            {rank=same; app1 app2}
        }
        
        subgraph cluster_noel {
            label="noel namespace";
            builder[label="Builder Service"];
            builderpods[label="Builder Pods", shape="box3d"];
            builder;
            builder -> builderpods;
        }
    }
}