digraph techviz {
  graph [rankdir=TB, splines=ortho, nodesep=0.55, ranksep=0.85];
  node [fontname=Helvetica, fontsize=11, margin="0.18,0.12", style="rounded,filled", fillcolor=white, color="#2d4357", penwidth=1.5];
  edge [fontname=Helvetica, fontsize=10, color="#364b5f", penwidth=1.4, arrowsize=0.75];
  n0 [label="호스트 nginx", shape=diamond, style="rounded,filled"];
  n1 [label="traefik (kc-lab-1)", shape=diamond, style="rounded,filled"];
  n2 [label="keycloak-1", shape=box, style="rounded,filled"];
  n3 [label="keycloak-0", shape=box, style="rounded,filled"];
  n4 [label="PostgreSQL · Redis", shape=cylinder, style="rounded,filled"];
  n0 -> n1 [label="TLS 종단", style=solid];
  n1 -> n2 [label="라우팅", style=solid];
  n1 -> n3 [label="라우팅", style=solid];
  n3 -> n4 [label="같은 노드", style=solid];
}