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
|
package external
import (
"strconv"
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin"
"github.com/mholt/caddy"
)
func init() {
caddy.RegisterPlugin("k8s_external", caddy.Plugin{
ServerType: "dns",
Action: setup,
})
}
func setup(c *caddy.Controller) error {
e, err := parse(c)
if err != nil {
return plugin.Error("k8s_external", err)
}
// Do this in OnStartup, so all plugins have been initialized.
c.OnStartup(func() error {
m := dnsserver.GetConfig(c).Handler("kubernetes")
if m == nil {
return nil
}
if x, ok := m.(Externaler); ok {
e.externalFunc = x.External
e.externalAddrFunc = x.ExternalAddress
}
return nil
})
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
e.Next = next
return e
})
return nil
}
func parse(c *caddy.Controller) (*External, error) {
e := New()
for c.Next() { // external
zones := c.RemainingArgs()
e.Zones = zones
if len(zones) == 0 {
e.Zones = make([]string, len(c.ServerBlockKeys))
copy(e.Zones, c.ServerBlockKeys)
}
for i, str := range e.Zones {
e.Zones[i] = plugin.Host(str).Normalize()
}
for c.NextBlock() {
switch c.Val() {
case "ttl":
args := c.RemainingArgs()
if len(args) == 0 {
return nil, c.ArgErr()
}
t, err := strconv.Atoi(args[0])
if err != nil {
return nil, err
}
if t < 0 || t > 3600 {
return nil, c.Errf("ttl must be in range [0, 3600]: %d", t)
}
e.ttl = uint32(t)
case "apex":
args := c.RemainingArgs()
if len(args) == 0 {
return nil, c.ArgErr()
}
e.apex = args[0]
default:
return nil, c.Errf("unknown property '%s'", c.Val())
}
}
}
return e, nil
}
|
