-
Notifications
You must be signed in to change notification settings - Fork 673
/
dot.go
143 lines (118 loc) · 4.06 KB
/
dot.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
// Copyright Project Contour Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package debug
import (
"fmt"
"io"
"github.com/projectcontour/contour/internal/dag"
"github.com/projectcontour/contour/internal/envoy"
)
// quick and dirty dot debugging package
type dotWriter struct {
*dag.Builder
}
type pair struct {
a, b interface{}
}
func (dw *dotWriter) writeDot(w io.Writer) {
fmt.Fprintln(w, "digraph DAG {\nrankdir=\"LR\"")
nodes := map[interface{}]bool{}
edges := map[pair]bool{}
// collect nodes and edges
for _, listener := range dw.Builder.Build().Listeners {
nodes[listener] = true
for _, vhost := range listener.VirtualHosts {
edges[pair{listener, vhost}] = true
nodes[vhost] = true
for _, route := range vhost.Routes {
edges[pair{vhost, route}] = true
nodes[route] = true
clusters := route.Clusters
if route.MirrorPolicy != nil && route.MirrorPolicy.Cluster != nil {
clusters = append(clusters, route.MirrorPolicy.Cluster)
}
for _, cluster := range clusters {
edges[pair{route, cluster}] = true
nodes[cluster] = true
if service := cluster.Upstream; service != nil {
edges[pair{cluster, service}] = true
nodes[service] = true
}
}
}
}
for _, vhost := range listener.SecureVirtualHosts {
edges[pair{listener, vhost}] = true
nodes[vhost] = true
for _, route := range vhost.Routes {
edges[pair{vhost, route}] = true
nodes[route] = true
clusters := route.Clusters
if route.MirrorPolicy != nil && route.MirrorPolicy.Cluster != nil {
clusters = append(clusters, route.MirrorPolicy.Cluster)
}
for _, cluster := range clusters {
edges[pair{route, cluster}] = true
nodes[cluster] = true
if service := cluster.Upstream; service != nil {
edges[pair{cluster, service}] = true
nodes[service] = true
}
}
}
if vhost.TCPProxy != nil {
edges[pair{vhost, vhost.TCPProxy}] = true
nodes[vhost.TCPProxy] = true
for _, cluster := range vhost.TCPProxy.Clusters {
edges[pair{vhost.TCPProxy, cluster}] = true
nodes[cluster] = true
if service := cluster.Upstream; service != nil {
edges[pair{cluster, service}] = true
nodes[service] = true
}
}
}
if vhost.Secret != nil {
edges[pair{vhost, vhost.Secret}] = true
nodes[vhost.Secret] = true
}
}
}
// print nodes
for node := range nodes {
switch node := node.(type) {
case *dag.Listener:
fmt.Fprintf(w, `"%p" [shape=record, label="{listener|%s:%d}"]`+"\n", node, node.Address, node.Port)
case *dag.VirtualHost:
fmt.Fprintf(w, `"%p" [shape=record, label="{http://%s}"]`+"\n", node, node.Name)
case *dag.SecureVirtualHost:
fmt.Fprintf(w, `"%p" [shape=record, label="{https://%s}"]`+"\n", node, node.VirtualHost.Name)
case *dag.Route:
fmt.Fprintf(w, `"%p" [shape=record, label="{%s}"]`+"\n", node, node.PathMatchCondition.String())
case *dag.Cluster:
fmt.Fprintf(w, `"%p" [shape=record, label="{cluster|{%s|weight %d}}"]`+"\n", node, envoy.Clustername(node), node.Weight)
case *dag.Service:
fmt.Fprintf(w, `"%p" [shape=record, label="{service|%s/%s:%d}"]`+"\n",
node, node.Weighted.ServiceNamespace, node.Weighted.ServiceName, node.Weighted.ServicePort.Port)
case *dag.Secret:
fmt.Fprintf(w, `"%p" [shape=record, label="{secret|%s/%s}"]`+"\n", node, node.Namespace(), node.Name())
case *dag.TCPProxy:
fmt.Fprintf(w, `"%p" [shape=record, label="{tcpproxy}"]`+"\n", node)
}
}
// print edges
for edge := range edges {
fmt.Fprintf(w, `"%p" -> "%p"`+"\n", edge.a, edge.b)
}
fmt.Fprintln(w, "}")
}