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docs: add topology docs and graphs

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This commit is contained in:
Lucas Servén Marín
2019-05-07 16:36:02 +02:00
parent 9f30d8d1a1
commit 5914a9468f
8 changed files with 1691 additions and 227 deletions
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33
pkg/mesh/graph.go
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@@ -31,6 +31,9 @@ func (t *Topology) Dot() (string, error) {
if err := g.AddAttr("kilo", string(gographviz.LabelLOC), "t"); err != nil {
return "", fmt.Errorf("failed to add label location to graph")
}
if err := g.AddAttr("kilo", string(gographviz.OutputOrder), "nodesfirst"); err != nil {
return "", fmt.Errorf("failed to set output ordering")
}
if err := g.AddAttr("kilo", string(gographviz.Overlap), "false"); err != nil {
return "", fmt.Errorf("failed to disable graph overlap")
}
@@ -41,6 +44,7 @@ func (t *Topology) Dot() (string, error) {
nodeAttrs := map[string]string{
string(gographviz.Shape): "ellipse",
}
for i, s := range t.segments {
if err := g.AddSubGraph("kilo", subGraphName(s.location), nil); err != nil {
return "", fmt.Errorf("failed to add subgraph")
@@ -66,21 +70,38 @@ func (t *Topology) Dot() (string, error) {
return "", fmt.Errorf("failed to add label to node")
}
}
meshSubGraph(g, g.Relations.SortedChildren(subGraphName(s.location)), s.leader)
meshSubGraph(g, g.Relations.SortedChildren(subGraphName(s.location)), s.leader, nil)
leaders[i] = graphEscape(s.hostnames[s.leader])
}
meshSubGraph(g, leaders, 0)
meshGraph(g, leaders, nil)
return g.String(), nil
}
func meshSubGraph(g *gographviz.Graph, nodes []string, leader int) {
func meshGraph(g *gographviz.Graph, nodes []string, attrs gographviz.Attrs) {
if attrs == nil {
attrs = make(gographviz.Attrs)
attrs[gographviz.Dir] = "both"
}
for i := range nodes {
for j := i + 1; j < len(nodes); j++ {
if i == j {
continue
}
g.Edges.Add(&gographviz.Edge{Src: nodes[i], Dst: nodes[j], Dir: true, Attrs: attrs})
}
}
}
func meshSubGraph(g *gographviz.Graph, nodes []string, leader int, attrs gographviz.Attrs) {
if attrs == nil {
attrs = make(gographviz.Attrs)
attrs[gographviz.Dir] = "both"
}
for i := range nodes {
if i == leader {
continue
}
a := make(gographviz.Attrs)
a[gographviz.Dir] = "both"
g.Edges.Add(&gographviz.Edge{Src: nodes[leader], Dst: nodes[i], Dir: true, Attrs: a})
g.Edges.Add(&gographviz.Edge{Src: nodes[leader], Dst: nodes[i], Dir: true, Attrs: attrs})
}
}