-
Notifications
You must be signed in to change notification settings - Fork 668
/
builder.go
127 lines (103 loc) · 3.38 KB
/
builder.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
// 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 dag
import (
"sort"
"github.com/projectcontour/contour/internal/k8s"
"github.com/projectcontour/contour/internal/metrics"
"github.com/projectcontour/contour/internal/status"
"github.com/prometheus/client_golang/prometheus"
"k8s.io/apimachinery/pkg/types"
gatewayapi_v1beta1 "sigs.k8s.io/gateway-api/apis/v1beta1"
)
// Processor constructs part of a DAG.
type Processor interface {
// Run executes the processor.
Run(dag *DAG, source *KubernetesCache)
}
// ProcessorFunc adapts a function to the Processor interface.
type ProcessorFunc func(*DAG, *KubernetesCache)
func (pf ProcessorFunc) Run(dag *DAG, source *KubernetesCache) {
if pf != nil {
pf(dag, source)
}
}
// Builder builds a DAG.
type Builder struct {
// Source is the source of Kubernetes objects
// from which to build a DAG.
Source KubernetesCache
// Processors is the ordered list of Processors to
// use to build the DAG.
Processors []Processor
// Metrics contains Prometheus metrics.
Metrics *metrics.Metrics
}
// Build builds and returns a new DAG by running the
// configured DAG processors, in order.
func (b *Builder) Build() *DAG {
gatewayNSName := types.NamespacedName{}
if b.Source.gateway != nil {
gatewayNSName = k8s.NamespacedNameOf(b.Source.gateway)
}
var gatewayController gatewayapi_v1beta1.GatewayController
if b.Source.gatewayclass != nil {
gatewayController = b.Source.gatewayclass.Spec.ControllerName
}
dag := &DAG{
StatusCache: status.NewCache(gatewayNSName, gatewayController),
Listeners: map[string]*Listener{},
}
if b.Metrics != nil {
t := prometheus.NewTimer(b.Metrics.DAGRebuildSeconds)
defer t.ObserveDuration()
}
for _, p := range b.Processors {
p.Run(dag, &b.Source)
}
// Prune invalid virtual hosts, and Listeners
// without any valid virtual hosts.
listeners := map[string]*Listener{}
for _, listener := range dag.Listeners {
var vhosts []*VirtualHost
for _, vh := range listener.VirtualHosts {
if vh.Valid() {
vhosts = append(vhosts, vh)
}
}
listener.VirtualHosts = vhosts
var svhosts []*SecureVirtualHost
for _, svh := range listener.SecureVirtualHosts {
if svh.Valid() {
svhosts = append(svhosts, svh)
}
}
listener.SecureVirtualHosts = svhosts
if len(listener.VirtualHosts) > 0 || len(listener.SecureVirtualHosts) > 0 {
sort.SliceStable(listener.VirtualHosts, func(i, j int) bool {
return listener.VirtualHosts[i].Name < listener.VirtualHosts[j].Name
})
sort.SliceStable(listener.SecureVirtualHosts, func(i, j int) bool {
return listener.SecureVirtualHosts[i].Name < listener.SecureVirtualHosts[j].Name
})
listener.vhostsByName = nil
listener.svhostsByName = nil
listeners[listener.Name] = listener
}
if listener.TCPProxy != nil {
listeners[listener.Name] = listener
}
}
dag.Listeners = listeners
return dag
}