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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
// +build etcd
package etcd
import (
"encoding/json"
"testing"
"time"
"github.com/coredns/coredns/plugin/etcd/msg"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/pkg/tls"
"github.com/coredns/coredns/plugin/pkg/upstream"
"github.com/coredns/coredns/plugin/proxy"
"github.com/coredns/coredns/plugin/test"
etcdc "github.com/coreos/etcd/client"
"github.com/miekg/dns"
"golang.org/x/net/context"
)
func init() {
ctxt = context.TODO()
}
// Note the key is encoded as DNS name, while in "reality" it is a etcd path.
var services = []*msg.Service{
{Host: "dev.server1", Port: 8080, Key: "a.server1.dev.region1.skydns.test."},
{Host: "10.0.0.1", Port: 8080, Key: "a.server1.prod.region1.skydns.test."},
{Host: "10.0.0.2", Port: 8080, Key: "b.server1.prod.region1.skydns.test."},
{Host: "::1", Port: 8080, Key: "b.server6.prod.region1.skydns.test."},
// Unresolvable internal name.
{Host: "unresolvable.skydns.test", Key: "cname.prod.region1.skydns.test."},
// Priority.
{Host: "priority.server1", Priority: 333, Port: 8080, Key: "priority.skydns.test."},
// Subdomain.
{Host: "sub.server1", Port: 0, Key: "a.sub.region1.skydns.test."},
{Host: "sub.server2", Port: 80, Key: "b.sub.region1.skydns.test."},
{Host: "10.0.0.1", Port: 8080, Key: "c.sub.region1.skydns.test."},
// Cname loop.
{Host: "a.cname.skydns.test", Key: "b.cname.skydns.test."},
{Host: "b.cname.skydns.test", Key: "a.cname.skydns.test."},
// Nameservers.
{Host: "10.0.0.2", Key: "a.ns.dns.skydns.test."},
{Host: "10.0.0.3", Key: "b.ns.dns.skydns.test."},
// Reverse.
{Host: "reverse.example.com", Key: "1.0.0.10.in-addr.arpa."}, // 10.0.0.1
}
var dnsTestCases = []test.Case{
// SRV Test
{
Qname: "a.server1.dev.region1.skydns.test.", Qtype: dns.TypeSRV,
Answer: []dns.RR{test.SRV("a.server1.dev.region1.skydns.test. 300 SRV 10 100 8080 dev.server1.")},
},
// SRV Test (case test)
{
Qname: "a.SERVer1.dEv.region1.skydns.tEst.", Qtype: dns.TypeSRV,
Answer: []dns.RR{test.SRV("a.SERVer1.dEv.region1.skydns.tEst. 300 SRV 10 100 8080 dev.server1.")},
},
// NXDOMAIN Test
{
Qname: "doesnotexist.skydns.test.", Qtype: dns.TypeA,
Rcode: dns.RcodeNameError,
Ns: []dns.RR{
test.SOA("skydns.test. 300 SOA ns.dns.skydns.test. hostmaster.skydns.test. 0 0 0 0 0"),
},
},
// A Test
{
Qname: "a.server1.prod.region1.skydns.test.", Qtype: dns.TypeA,
Answer: []dns.RR{test.A("a.server1.prod.region1.skydns.test. 300 A 10.0.0.1")},
},
// SRV Test where target is IP address
{
Qname: "a.server1.prod.region1.skydns.test.", Qtype: dns.TypeSRV,
Answer: []dns.RR{test.SRV("a.server1.prod.region1.skydns.test. 300 SRV 10 100 8080 a.server1.prod.region1.skydns.test.")},
Extra: []dns.RR{test.A("a.server1.prod.region1.skydns.test. 300 A 10.0.0.1")},
},
// AAAA Test
{
Qname: "b.server6.prod.region1.skydns.test.", Qtype: dns.TypeAAAA,
Answer: []dns.RR{test.AAAA("b.server6.prod.region1.skydns.test. 300 AAAA ::1")},
},
// Multiple A Record Test
{
Qname: "server1.prod.region1.skydns.test.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("server1.prod.region1.skydns.test. 300 A 10.0.0.1"),
test.A("server1.prod.region1.skydns.test. 300 A 10.0.0.2"),
},
},
// Priority Test
{
Qname: "priority.skydns.test.", Qtype: dns.TypeSRV,
Answer: []dns.RR{test.SRV("priority.skydns.test. 300 SRV 333 100 8080 priority.server1.")},
},
// Subdomain Test
{
Qname: "sub.region1.skydns.test.", Qtype: dns.TypeSRV,
Answer: []dns.RR{
test.SRV("sub.region1.skydns.test. 300 IN SRV 10 33 0 sub.server1."),
test.SRV("sub.region1.skydns.test. 300 IN SRV 10 33 80 sub.server2."),
test.SRV("sub.region1.skydns.test. 300 IN SRV 10 33 8080 c.sub.region1.skydns.test."),
},
Extra: []dns.RR{test.A("c.sub.region1.skydns.test. 300 IN A 10.0.0.1")},
},
// CNAME (unresolvable internal name)
{
Qname: "cname.prod.region1.skydns.test.", Qtype: dns.TypeA,
Ns: []dns.RR{test.SOA("skydns.test. 300 SOA ns.dns.skydns.test. hostmaster.skydns.test. 0 0 0 0 0")},
},
// Wildcard Test
{
Qname: "*.region1.skydns.test.", Qtype: dns.TypeSRV,
Answer: []dns.RR{
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 0 sub.server1."),
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 0 unresolvable.skydns.test."),
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 80 sub.server2."),
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 8080 a.server1.prod.region1.skydns.test."),
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 8080 b.server1.prod.region1.skydns.test."),
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 8080 b.server6.prod.region1.skydns.test."),
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 8080 c.sub.region1.skydns.test."),
test.SRV("*.region1.skydns.test. 300 IN SRV 10 12 8080 dev.server1."),
},
Extra: []dns.RR{
test.A("a.server1.prod.region1.skydns.test. 300 IN A 10.0.0.1"),
test.A("b.server1.prod.region1.skydns.test. 300 IN A 10.0.0.2"),
test.AAAA("b.server6.prod.region1.skydns.test. 300 IN AAAA ::1"),
test.A("c.sub.region1.skydns.test. 300 IN A 10.0.0.1"),
},
},
// Wildcard Test
{
Qname: "prod.*.skydns.test.", Qtype: dns.TypeSRV,
Answer: []dns.RR{
test.SRV("prod.*.skydns.test. 300 IN SRV 10 25 0 unresolvable.skydns.test."),
test.SRV("prod.*.skydns.test. 300 IN SRV 10 25 8080 a.server1.prod.region1.skydns.test."),
test.SRV("prod.*.skydns.test. 300 IN SRV 10 25 8080 b.server1.prod.region1.skydns.test."),
test.SRV("prod.*.skydns.test. 300 IN SRV 10 25 8080 b.server6.prod.region1.skydns.test."),
},
Extra: []dns.RR{
test.A("a.server1.prod.region1.skydns.test. 300 IN A 10.0.0.1"),
test.A("b.server1.prod.region1.skydns.test. 300 IN A 10.0.0.2"),
test.AAAA("b.server6.prod.region1.skydns.test. 300 IN AAAA ::1"),
},
},
// Wildcard Test
{
Qname: "prod.any.skydns.test.", Qtype: dns.TypeSRV,
Answer: []dns.RR{
test.SRV("prod.any.skydns.test. 300 IN SRV 10 25 0 unresolvable.skydns.test."),
test.SRV("prod.any.skydns.test. 300 IN SRV 10 25 8080 a.server1.prod.region1.skydns.test."),
test.SRV("prod.any.skydns.test. 300 IN SRV 10 25 8080 b.server1.prod.region1.skydns.test."),
test.SRV("prod.any.skydns.test. 300 IN SRV 10 25 8080 b.server6.prod.region1.skydns.test."),
},
Extra: []dns.RR{
test.A("a.server1.prod.region1.skydns.test. 300 IN A 10.0.0.1"),
test.A("b.server1.prod.region1.skydns.test. 300 IN A 10.0.0.2"),
test.AAAA("b.server6.prod.region1.skydns.test. 300 IN AAAA ::1"),
},
},
// CNAME loop detection
{
Qname: "a.cname.skydns.test.", Qtype: dns.TypeA,
Ns: []dns.RR{test.SOA("skydns.test. 300 SOA ns.dns.skydns.test. hostmaster.skydns.test. 1407441600 28800 7200 604800 60")},
},
// NODATA Test
{
Qname: "a.server1.dev.region1.skydns.test.", Qtype: dns.TypeTXT,
Ns: []dns.RR{test.SOA("skydns.test. 300 SOA ns.dns.skydns.test. hostmaster.skydns.test. 0 0 0 0 0")},
},
// NODATA Test
{
Qname: "a.server1.dev.region1.skydns.test.", Qtype: dns.TypeHINFO,
Ns: []dns.RR{test.SOA("skydns.test. 300 SOA ns.dns.skydns.test. hostmaster.skydns.test. 0 0 0 0 0")},
},
// NXDOMAIN Test
{
Qname: "a.server1.nonexistent.region1.skydns.test.", Qtype: dns.TypeHINFO, Rcode: dns.RcodeNameError,
Ns: []dns.RR{test.SOA("skydns.test. 300 SOA ns.dns.skydns.test. hostmaster.skydns.test. 0 0 0 0 0")},
},
{
Qname: "skydns.test.", Qtype: dns.TypeSOA,
Answer: []dns.RR{test.SOA("skydns.test. 300 IN SOA ns.dns.skydns.test. hostmaster.skydns.test. 1460498836 14400 3600 604800 60")},
},
// NS Record Test
{
Qname: "skydns.test.", Qtype: dns.TypeNS,
Answer: []dns.RR{
test.NS("skydns.test. 300 NS a.ns.dns.skydns.test."),
test.NS("skydns.test. 300 NS b.ns.dns.skydns.test."),
},
Extra: []dns.RR{
test.A("a.ns.dns.skydns.test. 300 A 10.0.0.2"),
test.A("b.ns.dns.skydns.test. 300 A 10.0.0.3"),
},
},
// NS Record Test
{
Qname: "a.skydns.test.", Qtype: dns.TypeNS, Rcode: dns.RcodeNameError,
Ns: []dns.RR{test.SOA("skydns.test. 300 IN SOA ns.dns.skydns.test. hostmaster.skydns.test. 1460498836 14400 3600 604800 60")},
},
// A Record For NS Record Test
{
Qname: "ns.dns.skydns.test.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("ns.dns.skydns.test. 300 A 10.0.0.2"),
test.A("ns.dns.skydns.test. 300 A 10.0.0.3"),
},
},
{
Qname: "skydns_extra.test.", Qtype: dns.TypeSOA,
Answer: []dns.RR{test.SOA("skydns_extra.test. 300 IN SOA ns.dns.skydns_extra.test. hostmaster.skydns_extra.test. 1460498836 14400 3600 604800 60")},
},
// Reverse lookup
{
Qname: "1.0.0.10.in-addr.arpa.", Qtype: dns.TypePTR,
Answer: []dns.RR{test.PTR("1.0.0.10.in-addr.arpa. 300 PTR reverse.example.com.")},
},
}
func newEtcdPlugin() *Etcd {
ctxt = context.TODO()
endpoints := []string{"http://localhost:2379"}
tlsc, _ := tls.NewTLSConfigFromArgs()
client, _ := newEtcdClient(endpoints, tlsc)
p := proxy.NewLookup([]string{"8.8.8.8:53"})
return &Etcd{
Upstream: upstream.Upstream{Forward: &p},
PathPrefix: "skydns",
Ctx: context.Background(),
Zones: []string{"skydns.test.", "skydns_extra.test.", "in-addr.arpa."},
Client: client,
}
}
func set(t *testing.T, e *Etcd, k string, ttl time.Duration, m *msg.Service) {
b, err := json.Marshal(m)
if err != nil {
t.Fatal(err)
}
path, _ := msg.PathWithWildcard(k, e.PathPrefix)
e.Client.Set(ctxt, path, string(b), &etcdc.SetOptions{TTL: ttl})
}
func delete(t *testing.T, e *Etcd, k string) {
path, _ := msg.PathWithWildcard(k, e.PathPrefix)
e.Client.Delete(ctxt, path, &etcdc.DeleteOptions{Recursive: false})
}
func TestLookup(t *testing.T) {
etc := newEtcdPlugin()
for _, serv := range services {
set(t, etc, serv.Key, 0, serv)
defer delete(t, etc, serv.Key)
}
for _, tc := range dnsTestCases {
m := tc.Msg()
rec := dnstest.NewRecorder(&test.ResponseWriter{})
etc.ServeDNS(ctxt, rec, m)
resp := rec.Msg
test.SortAndCheck(t, resp, tc)
}
}
var ctxt context.Context
|
