func CreateRootNode(g *graph.Graph) *graph.Node {
hostID := config.GetConfig().GetString("host_id")
m := graph.Metadata{"Name": hostID, "Type": "host"}
if config.GetConfig().IsSet("agent.metadata") {
subtree := config.GetConfig().Sub("agent.metadata")
for key, value := range subtree.AllSettings() {
m[key] = value
}
}
buffer, err := ioutil.ReadFile("/var/lib/cloud/data/instance-id")
if err == nil {
m["InstanceID"] = strings.TrimSpace(string(buffer))
}
u, _ := uuid.NewV5(uuid.NamespaceOID, []byte(hostID))
return g.NewNode(graph.Identifier(u.String()), m)
}
