ClusterStatus.dot

digraph ClusterStateMachine {
    graph [nodesep = "1.0", ranksep = "1.0"];
    node [style = filled];
    compound = true;
    newrank = false;

    start [shape = house, color = coral];
    insufficient [color = lightpink];
    ready [color = cadetblue3];
    subgraph cluster_level1 {
        "preparing-for-installation" [color = darkolivegreen3];
        installing [color = darkolivegreen3];
        finalizing [color = darkolivegreen3];
    }
    installed [shape = doublecircle, color = chartreuse];
    error [shape = doublecircle, color = crimson];
    cancelled [shape = doublecircle, color = slategray];

    start -> insufficient [label = "cluster\ncreated", color=lightpink3, fontcolor=lightpink3];

    insufficient -> ready [label = "min reqs met", color=cadetblue4, fontcolor=cadetblue4];

    ready -> insufficient [label = "min reqs\nnot met", color=lightpink3, fontcolor=lightpink3];
    ready -> "preparing-for-installation" [label = "installation started", color=darkolivegreen3, fontcolor=darkolivegreen4];

    cancelled -> insufficient [label = "reset", color=lightpink3, fontcolor=lightpink3];

    "preparing-for-installation" -> installing [color=darkolivegreen4];

    installing -> finalizing [label = "3 masters\n[+ >=2 workers]\ninstalled", color=chartreuse4, fontcolor=chartreuse4];

    installing -> "installing-pending-user-action" [label = "hosts in wrong boot order", color=cornsilk4, fontcolor=cornsilk4];

    "installing-pending-user-action" -> installing [label = "fixed wrong boot order", fontcolor=darkolivegreen4, color=darkolivegreen4];
    "installing-pending-user-action" -> cancelled [label = "cancel", color=slategray, fontcolor=slategray];
    "installing-pending-user-action" -> error [label = "error\n", color=crimson, fontcolor=crimson];

    finalizing -> error [label = "installation\nerror\n", color=crimson, fontcolor=crimson, ltail = cluster_level1];
    finalizing -> cancelled [label = "cancel", color=slategray, fontcolor=slategray, ltail = cluster_level1];
    finalizing -> installed [label = "installation\ncompleted", color=chartreuse4, fontcolor=chartreuse4];

    error -> insufficient [label = "reset", color=lightpink3, fontcolor=lightpink3];

    {rank=min; start}
    {rank=max; installed}
    {rank=same; start; insufficient; ready}
    {rank=same; installed; error; cancelled}
}