This repository has been archived by the owner on Feb 19, 2024. It is now read-only.
forked from coredns/coredns
/
setup.go
132 lines (111 loc) · 2.54 KB
/
setup.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
package file
import (
"os"
"path"
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/pkg/parse"
"github.com/coredns/coredns/plugin/pkg/upstream"
"github.com/mholt/caddy"
)
func init() {
caddy.RegisterPlugin("file", caddy.Plugin{
ServerType: "dns",
Action: setup,
})
}
func setup(c *caddy.Controller) error {
zones, err := fileParse(c)
if err != nil {
return plugin.Error("file", err)
}
// Add startup functions to notify the master(s).
for _, n := range zones.Names {
z := zones.Z[n]
c.OnStartup(func() error {
z.StartupOnce.Do(func() {
if len(z.TransferTo) > 0 {
z.Notify()
}
z.Reload()
})
return nil
})
}
for _, n := range zones.Names {
z := zones.Z[n]
c.OnShutdown(z.OnShutdown)
}
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
return File{Next: next, Zones: zones}
})
return nil
}
func fileParse(c *caddy.Controller) (Zones, error) {
z := make(map[string]*Zone)
names := []string{}
origins := []string{}
config := dnsserver.GetConfig(c)
for c.Next() {
// file db.file [zones...]
if !c.NextArg() {
return Zones{}, c.ArgErr()
}
fileName := c.Val()
origins = make([]string, len(c.ServerBlockKeys))
copy(origins, c.ServerBlockKeys)
args := c.RemainingArgs()
if len(args) > 0 {
origins = args
}
if !path.IsAbs(fileName) && config.Root != "" {
fileName = path.Join(config.Root, fileName)
}
reader, err := os.Open(fileName)
if err != nil {
// bail out
return Zones{}, err
}
for i := range origins {
origins[i] = plugin.Host(origins[i]).Normalize()
zone, err := Parse(reader, origins[i], fileName, 0)
if err == nil {
z[origins[i]] = zone
} else {
return Zones{}, err
}
names = append(names, origins[i])
}
noReload := false
upstr := upstream.Upstream{}
t := []string{}
var e error
for c.NextBlock() {
switch c.Val() {
case "transfer":
t, _, e = parse.Transfer(c, false)
if e != nil {
return Zones{}, e
}
case "no_reload":
noReload = true
case "upstream":
args := c.RemainingArgs()
upstr, err = upstream.NewUpstream(args)
if err != nil {
return Zones{}, err
}
default:
return Zones{}, c.Errf("unknown property '%s'", c.Val())
}
for _, origin := range origins {
if t != nil {
z[origin].TransferTo = append(z[origin].TransferTo, t...)
}
z[origin].NoReload = noReload
z[origin].Upstream = upstr
}
}
}
return Zones{Z: z, Names: names}, nil
}