forked from hashicorp/terraform
-
Notifications
You must be signed in to change notification settings - Fork 0
/
resource_aws_sns_topic_policy.go
177 lines (156 loc) · 4.67 KB
/
resource_aws_sns_topic_policy.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
package aws
import (
"fmt"
"log"
"regexp"
"time"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/sns"
)
func resourceAwsSnsTopicPolicy() *schema.Resource {
return &schema.Resource{
Create: resourceAwsSnsTopicPolicyUpsert,
Read: resourceAwsSnsTopicPolicyRead,
Update: resourceAwsSnsTopicPolicyUpsert,
Delete: resourceAwsSnsTopicPolicyDelete,
Schema: map[string]*schema.Schema{
"arn": {
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"policy": {
Type: schema.TypeString,
Required: true,
DiffSuppressFunc: suppressEquivalentAwsPolicyDiffs,
},
},
}
}
func resourceAwsSnsTopicPolicyUpsert(d *schema.ResourceData, meta interface{}) error {
arn := d.Get("arn").(string)
req := sns.SetTopicAttributesInput{
TopicArn: aws.String(arn),
AttributeName: aws.String("Policy"),
AttributeValue: aws.String(d.Get("policy").(string)),
}
d.SetId(arn)
// Retry the update in the event of an eventually consistent style of
// error, where say an IAM resource is successfully created but not
// actually available. See https://github.com/hashicorp/terraform/issues/3660
log.Printf("[DEBUG] Updating SNS Topic Policy: %s", req)
stateConf := &resource.StateChangeConf{
Pending: []string{"retrying"},
Target: []string{"success"},
Refresh: resourceAwsSNSUpdateRefreshFunc(meta, req),
Timeout: 3 * time.Minute,
MinTimeout: 3 * time.Second,
}
_, err := stateConf.WaitForState()
if err != nil {
return err
}
return resourceAwsSnsTopicPolicyRead(d, meta)
}
func resourceAwsSnsTopicPolicyRead(d *schema.ResourceData, meta interface{}) error {
snsconn := meta.(*AWSClient).snsconn
attributeOutput, err := snsconn.GetTopicAttributes(&sns.GetTopicAttributesInput{
TopicArn: aws.String(d.Id()),
})
if err != nil {
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "NotFound" {
log.Printf("[WARN] SNS Topic (%s) not found, error code (404)", d.Id())
d.SetId("")
return nil
}
return err
}
if attributeOutput.Attributes == nil {
log.Printf("[WARN] SNS Topic (%q) attributes not found (nil)", d.Id())
d.SetId("")
return nil
}
attrmap := attributeOutput.Attributes
policy, ok := attrmap["Policy"]
if !ok {
log.Printf("[WARN] SNS Topic (%q) policy not found in attributes", d.Id())
d.SetId("")
return nil
}
d.Set("policy", policy)
return nil
}
func resourceAwsSnsTopicPolicyDelete(d *schema.ResourceData, meta interface{}) error {
accountId, err := getAccountIdFromSnsTopicArn(d.Id())
if err != nil {
return err
}
req := sns.SetTopicAttributesInput{
TopicArn: aws.String(d.Id()),
AttributeName: aws.String("Policy"),
// It is impossible to delete a policy or set to empty
// (confirmed by AWS Support representative)
// so we instead set it back to the default one
AttributeValue: aws.String(buildDefaultSnsTopicPolicy(d.Id(), accountId)),
}
// Retry the update in the event of an eventually consistent style of
// error, where say an IAM resource is successfully created but not
// actually available. See https://github.com/hashicorp/terraform/issues/3660
log.Printf("[DEBUG] Resetting SNS Topic Policy to default: %s", req)
stateConf := &resource.StateChangeConf{
Pending: []string{"retrying"},
Target: []string{"success"},
Refresh: resourceAwsSNSUpdateRefreshFunc(meta, req),
Timeout: 3 * time.Minute,
MinTimeout: 3 * time.Second,
}
_, err = stateConf.WaitForState()
if err != nil {
return err
}
return nil
}
func getAccountIdFromSnsTopicArn(arn string) (string, error) {
// arn:aws:sns:us-west-2:123456789012:test-new
re := regexp.MustCompile("^arn:aws:sns:[^:]+:([0-9]{12}):.+")
matches := re.FindStringSubmatch(arn)
if len(matches) != 2 {
return "", fmt.Errorf("Unable to get account ID from ARN (%q)", arn)
}
return matches[1], nil
}
func buildDefaultSnsTopicPolicy(topicArn, accountId string) string {
return fmt.Sprintf(`{
"Version": "2008-10-17",
"Id": "__default_policy_ID",
"Statement": [
{
"Sid": "__default_statement_ID",
"Effect": "Allow",
"Principal": {
"AWS": "*"
},
"Action": [
"SNS:GetTopicAttributes",
"SNS:SetTopicAttributes",
"SNS:AddPermission",
"SNS:RemovePermission",
"SNS:DeleteTopic",
"SNS:Subscribe",
"SNS:ListSubscriptionsByTopic",
"SNS:Publish",
"SNS:Receive"
],
"Resource": "%s",
"Condition": {
"StringEquals": {
"AWS:SourceOwner": "%s"
}
}
}
]
}`, topicArn, accountId)
}