arch-3.dot

digraph {
	fontname="Microsoft YaHei";
    fontsize=10;
    dir=LR;

    graph [dpi=180];

    node [shape="Mrecord", fontname="Consolas", fontsize=10];
    edge [color="#05c3de", fontname="Consolas", fontsize=10];

    chrome [shape="none", image="logos/browser-icon-chrome-resized.png", label=""];
    firefox [shape="none", image="logos/browser-icon-firefox-resized.png", label=""];
    
	chrome -> squid;
	firefox -> squid;

	subgraph cluster_backend {
		color="#009801";
		fontcolor="#009801";
		label="GIS backend";
		//nginx [shape="none", image="logos/nginx_logo_resized.png", label=""];    
		squid [shape="none", image="logos/squid_logo_resized.png", label=""];

		subgraph cluster_wms {
			color="#6BD06A";
			fontcolor="#6BD06A";
			label="Web Mapping Service";
			wms1 [shape="none", image="logos/mapserver_logo_resized.png", label=""];
			wms2 [shape="none", image="logos/mapserver_logo_resized.png", label=""];
		}

		subgraph cluster_wfs {
			color="#363AA1";
			fontcolor="#363AA1";
			label="Web Feature Service";
			wfs1 [shape="none", image="logos/mapserver_logo_resized.png", label=""];
			wfs2 [shape="none", image="logos/mapserver_logo_resized.png", label=""];
		}

		subgraph cluster_wps {
			color="#FF7A28";
			fontcolor="#FF7A28";
			label="Web Processing Service";
			wps1 [shape="none", image="logos/deegree_logo_resized.png", label=""]
			wps2 [shape="none", image="logos/deegree_logo_resized.png", label=""]
		}
		
		squid -> wfs1;
		squid -> wms1;
		squid -> wps1;

		wfs1 -> pgpool2;
		wms1 -> pgpool2;
		wps1 -> pgpool2;

		pgpool2 [shape="none", image="logos/pgpool_ii_logo_resized.png", label=""];

		subgraph cluster_pg {
			color="#326791";
			fontcolor="#326791";
			label="Spatial Database Cluster";
			pg1 [shape="none", image="logos/postgresql_logo_resized.png", label=""];
			pg2 [shape="none", image="logos/postgresql_logo_resized.png", label=""];
			pg3 [shape="none", image="logos/postgresql_logo_resized.png", label=""];
		}
		
		pgpool2 -> pg1;
		pgpool2 -> pg2;
		pgpool2 -> pg3;

	}


}