forked from hashicorp/terraform
/
resource_aws_internet_gateway.go
307 lines (260 loc) · 7.66 KB
/
resource_aws_internet_gateway.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
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
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
package aws
import (
"fmt"
"log"
"time"
"github.com/hashicorp/terraform/helper/diff"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/terraform"
"github.com/mitchellh/goamz/ec2"
)
func resource_aws_internet_gateway_create(
s *terraform.InstanceState,
d *terraform.InstanceDiff,
meta interface{}) (*terraform.InstanceState, error) {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
// Create the gateway
log.Printf("[DEBUG] Creating internet gateway")
resp, err := ec2conn.CreateInternetGateway(nil)
if err != nil {
return nil, fmt.Errorf("Error creating subnet: %s", err)
}
// Get the ID and store it
ig := &resp.InternetGateway
s.ID = ig.InternetGatewayId
log.Printf("[INFO] InternetGateway ID: %s", s.ID)
// Update our attributes and return
return resource_aws_internet_gateway_update(s, d, meta)
}
func resource_aws_internet_gateway_update(
s *terraform.InstanceState,
d *terraform.InstanceDiff,
meta interface{}) (*terraform.InstanceState, error) {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
// Merge the diff so we have the latest attributes
rs := s.MergeDiff(d)
// A note on the states below: the AWS docs (as of July, 2014) say
// that the states would be: attached, attaching, detached, detaching,
// but when running, I noticed that the state is usually "available" when
// it is attached.
// If we're already attached, detach it first
if err := resource_aws_internet_gateway_detach(ec2conn, s); err != nil {
return s, err
}
// Set the VPC ID to empty since we're detached at this point
delete(rs.Attributes, "vpc_id")
if attr, ok := d.Attributes["vpc_id"]; ok && attr.New != "" {
err := resource_aws_internet_gateway_attach(ec2conn, s, attr.New)
if err != nil {
return rs, err
}
rs.Attributes["vpc_id"] = attr.New
}
return resource_aws_internet_gateway_update_state(rs, nil)
}
func resource_aws_internet_gateway_destroy(
s *terraform.InstanceState,
meta interface{}) error {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
// Detach if it is attached
if err := resource_aws_internet_gateway_detach(ec2conn, s); err != nil {
return err
}
log.Printf("[INFO] Deleting Internet Gateway: %s", s.ID)
return resource.Retry(5*time.Minute, func() error {
_, err := ec2conn.DeleteInternetGateway(s.ID)
if err != nil {
ec2err, ok := err.(*ec2.Error)
if !ok {
return err
}
switch ec2err.Code {
case "InvalidInternetGatewayID.NotFound":
return nil
case "DependencyViolation":
return err // retry
default:
return resource.RetryError{err}
}
}
return fmt.Errorf("Error deleting internet gateway: %s", err)
})
// Wait for the internet gateway to actually delete
log.Printf("[DEBUG] Waiting for internet gateway (%s) to delete", s.ID)
stateConf := &resource.StateChangeConf{
Pending: []string{"available"},
Target: "",
Refresh: IGStateRefreshFunc(ec2conn, s.ID),
Timeout: 10 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for internet gateway (%s) to destroy: %s",
s.ID, err)
}
return nil
}
func resource_aws_internet_gateway_refresh(
s *terraform.InstanceState,
meta interface{}) (*terraform.InstanceState, error) {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
igRaw, _, err := IGStateRefreshFunc(ec2conn, s.ID)()
if err != nil {
return s, err
}
if igRaw == nil {
return nil, nil
}
ig := igRaw.(*ec2.InternetGateway)
return resource_aws_internet_gateway_update_state(s, ig)
}
func resource_aws_internet_gateway_diff(
s *terraform.InstanceState,
c *terraform.ResourceConfig,
meta interface{}) (*terraform.InstanceDiff, error) {
b := &diff.ResourceBuilder{
Attrs: map[string]diff.AttrType{
"vpc_id": diff.AttrTypeUpdate,
},
}
return b.Diff(s, c)
}
func resource_aws_internet_gateway_attach(
ec2conn *ec2.EC2,
s *terraform.InstanceState,
vpcId string) error {
log.Printf(
"[INFO] Attaching Internet Gateway '%s' to VPC '%s'",
s.ID,
vpcId)
_, err := ec2conn.AttachInternetGateway(s.ID, vpcId)
if err != nil {
return err
}
// Wait for it to be fully attached before continuing
log.Printf("[DEBUG] Waiting for internet gateway (%s) to attach", s.ID)
stateConf := &resource.StateChangeConf{
Pending: []string{"detached", "attaching"},
Target: "available",
Refresh: IGAttachStateRefreshFunc(ec2conn, s.ID, "available"),
Timeout: 1 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for internet gateway (%s) to attach: %s",
s.ID, err)
}
return nil
}
func resource_aws_internet_gateway_detach(
ec2conn *ec2.EC2,
s *terraform.InstanceState) error {
if s.Attributes["vpc_id"] == "" {
return nil
}
log.Printf(
"[INFO] Detaching Internet Gateway '%s' from VPC '%s'",
s.ID,
s.Attributes["vpc_id"])
wait := true
_, err := ec2conn.DetachInternetGateway(s.ID, s.Attributes["vpc_id"])
if err != nil {
ec2err, ok := err.(*ec2.Error)
if ok {
if ec2err.Code == "InvalidInternetGatewayID.NotFound" {
err = nil
wait = false
} else if ec2err.Code == "Gateway.NotAttached" {
err = nil
wait = false
}
}
if err != nil {
return err
}
}
delete(s.Attributes, "vpc_id")
if !wait {
return nil
}
// Wait for it to be fully detached before continuing
log.Printf("[DEBUG] Waiting for internet gateway (%s) to detach", s.ID)
stateConf := &resource.StateChangeConf{
Pending: []string{"attached", "detaching", "available"},
Target: "detached",
Refresh: IGAttachStateRefreshFunc(ec2conn, s.ID, "detached"),
Timeout: 1 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for internet gateway (%s) to detach: %s",
s.ID, err)
}
return nil
}
func resource_aws_internet_gateway_update_state(
s *terraform.InstanceState,
ig *ec2.InternetGateway) (*terraform.InstanceState, error) {
return s, nil
}
// IGStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch
// an internet gateway.
func IGStateRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc {
return func() (interface{}, string, error) {
resp, err := conn.DescribeInternetGateways([]string{id}, ec2.NewFilter())
if err != nil {
ec2err, ok := err.(*ec2.Error)
if ok && ec2err.Code == "InvalidInternetGatewayID.NotFound" {
resp = nil
} else {
log.Printf("[ERROR] Error on IGStateRefresh: %s", err)
return nil, "", err
}
}
if resp == nil {
// Sometimes AWS just has consistency issues and doesn't see
// our instance yet. Return an empty state.
return nil, "", nil
}
ig := &resp.InternetGateways[0]
return ig, "available", nil
}
}
// IGAttachStateRefreshFunc returns a resource.StateRefreshFunc that is used
// watch the state of an internet gateway's attachment.
func IGAttachStateRefreshFunc(conn *ec2.EC2, id string, expected string) resource.StateRefreshFunc {
var start time.Time
return func() (interface{}, string, error) {
if start.IsZero() {
start = time.Now()
}
resp, err := conn.DescribeInternetGateways([]string{id}, ec2.NewFilter())
if err != nil {
ec2err, ok := err.(*ec2.Error)
if ok && ec2err.Code == "InvalidInternetGatewayID.NotFound" {
resp = nil
} else {
log.Printf("[ERROR] Error on IGStateRefresh: %s", err)
return nil, "", err
}
}
if resp == nil {
// Sometimes AWS just has consistency issues and doesn't see
// our instance yet. Return an empty state.
return nil, "", nil
}
ig := &resp.InternetGateways[0]
if time.Now().Sub(start) > 10*time.Second {
return ig, expected, nil
}
if len(ig.Attachments) == 0 {
// No attachments, we're detached
return ig, "detached", nil
}
return ig, ig.Attachments[0].State, nil
}
}