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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
// dynamic domain no-name system service
//
// a simple dynamic dns record updating utility which fetches your
// ip address from a source, and lets a provider know of the fresh
// address.
package main
import (
"flag"
"fmt"
"log/slog"
"os"
"git.rnrd.eu/ddnnss/provider"
"git.rnrd.eu/ddnnss/source"
)
const version = "1.0.0"
func main() {
configPath := flag.String("config", "/etc/ddnnss.json", "config file")
showVersion := flag.Bool("version", false, "print the version and exit")
flag.Parse()
if *showVersion {
fmt.Println("ddnnss", version)
return
}
baseLog := slog.New(slog.NewTextHandler(os.Stderr, nil))
baseLog.Info("ddnnss!", slog.String("version", version))
cfg, err := LoadConfig(*configPath)
if err != nil {
baseLog.Error("could not load config", slog.String("error", err.Error()))
os.Exit(1)
}
providers, sources := createModules(baseLog, cfg)
baseLog.Info("starting new cycle", slog.Int("records", len(cfg.Records)))
failed := false
for _, r := range cfg.Records {
fqdn := r.Name + "." + r.Zone
log := baseLog.With(
slog.Group("record",
slog.String("fqdn", fqdn),
slog.String("type", string(r.Type)),
),
)
sourceName, providerName := r.Source, r.Provider
log.Info(
"ensuring record",
slog.String("provider", providerName),
slog.String("source", sourceName),
)
s, ok := sources[sourceName]
if !ok || s == nil {
log.Error(
"skipping record, failed creating source",
slog.String("source", sourceName),
)
failed = true
continue
}
p, ok := providers[providerName]
if !ok || p == nil {
log.Error(
"skipping record, failed creating provider",
slog.String("provider", providerName),
)
failed = true
continue
}
family := source.IPv4
if r.Type == provider.TypeAAAA {
family = source.IPv6
}
if !s.Supports(family) {
log.Error(
"skipping record, source cannot provide the needed address family",
slog.String("source", sourceName),
slog.String("family", string(family)),
)
failed = true
continue
}
addr, err := s.Lookup(family)
if err != nil {
log.Error(
"failed record, address lookup failed",
slog.String("source", sourceName),
slog.String("error", err.Error()),
)
failed = true
continue
}
prev, changed, err := p.Ensure(r.Zone, r.Name, r.Type, addr)
switch {
case err != nil:
log.Error("record update failed", slog.String("error", err.Error()))
failed = true
case changed && prev == "":
log.Info("record created", slog.String("addr", addr.String()))
case changed:
log.Info("record updated", slog.String("from", prev), slog.String("to", addr.String()))
default:
log.Info("record unchanged", "addr", addr)
}
}
baseLog.Info(
"cycle finished!",
slog.Int("records", len(cfg.Records)),
slog.Bool("failed", failed),
)
if failed {
baseLog.Error("not all records were ensured successfully")
os.Exit(1)
}
}
func createModules(log *slog.Logger, cfg *Config) (map[string]provider.Provider, map[string]source.Source) {
sources := map[string]source.Source{}
providers := map[string]provider.Provider{}
for name, c := range cfg.Sources {
s, err := source.New(log, name, c)
if err != nil {
log.Error(
"failed creating source",
slog.String("name", name),
slog.String("kind", string(c.Kind)),
slog.String("error", err.Error()),
)
sources[name] = nil
continue
}
sources[name] = s
}
for name, c := range cfg.Providers {
p, err := provider.New(log, name, c)
if err != nil {
log.Error(
"failed creating provider",
slog.String("name", name),
slog.String("kind", string(c.Kind)),
slog.String("error", err.Error()),
)
providers[name] = nil
continue
}
providers[name] = p
}
return providers, sources
}
|
