"Dot" /graphviz source code of graph used to create the image of the deployment triangle at http://nschoenmaker.nl/2013/02/technical-solution-to-a-social-problem

deployment_triangle.dot

digraph deployment_triangle {
  subgraph same_ranking_subgraph {
    rank = same;
    deployed;
    master;
  }
  deployed -> "target tag" -> master -> "target tag" -> deployed -> master -> deployed
}