-
-
Notifications
You must be signed in to change notification settings - Fork 356
/
sns.go
194 lines (164 loc) · 5.67 KB
/
sns.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
package resources
import (
"context"
"strings"
"sync"
"time"
"github.com/aws/aws-sdk-go/service/sns"
"github.com/gruntwork-io/cloud-nuke/util"
"github.com/aws/aws-sdk-go/aws"
"github.com/gruntwork-io/cloud-nuke/config"
"github.com/gruntwork-io/cloud-nuke/logging"
"github.com/gruntwork-io/cloud-nuke/report"
"github.com/gruntwork-io/go-commons/errors"
"github.com/hashicorp/go-multierror"
)
// getAllSNSTopics returns a list of all SNS topics in the region, filtering the name by the config
// The SQS APIs do not return a creation date, therefore we tag the resources with a first seen time when the topic first appears. We then
// use that tag to measure the excludeAfter time duration, and determine whether to nuke the resource based on that.
func (s *SNSTopic) getAll(c context.Context, configObj config.Config) ([]*string, error) {
var snsTopics []*string
var firstSeenTime *time.Time
var err error
excludeFirstSeenTag, err := util.GetBoolFromContext(c, util.ExcludeFirstSeenTagKey)
if err != nil {
return nil, errors.WithStackTrace(err)
}
err = s.Client.ListTopicsPages(&sns.ListTopicsInput{}, func(page *sns.ListTopicsOutput, lastPage bool) bool {
for _, topic := range page.Topics {
if !excludeFirstSeenTag {
firstSeenTime, err = s.getFirstSeenTag(*topic.TopicArn)
if err != nil {
logging.Errorf(
"Unable to retrieve tags for SNS Topic: %s, with error: %s", *topic.TopicArn, err)
continue
}
if firstSeenTime == nil {
now := time.Now().UTC()
firstSeenTime = &now
if err := s.setFirstSeenTag(*topic.TopicArn, now); err != nil {
logging.Errorf(
"Unable to apply first seen tag SNS Topic: %s, with error: %s", *topic.TopicArn, err)
continue
}
}
}
// a topic arn is of the form arn:aws:sns:us-east-1:123456789012:MyTopic
// so we can search for the index of the last colon, then slice the string to get the topic name
nameIndex := strings.LastIndex(*topic.TopicArn, ":")
topicName := (*topic.TopicArn)[nameIndex+1:]
if configObj.SNS.ShouldInclude(config.ResourceValue{
Time: firstSeenTime,
Name: &topicName,
}) {
snsTopics = append(snsTopics, topic.TopicArn)
}
}
return !lastPage
})
if err != nil {
return nil, errors.WithStackTrace(err)
}
return snsTopics, nil
}
// getFirstSeenSNSTopicTag will retrive the time that the topic was first seen, otherwise returning nil if the topic has not been
// seen before.
func (s *SNSTopic) getFirstSeenTag(topicArn string) (*time.Time, error) {
response, err := s.Client.ListTagsForResource(&sns.ListTagsForResourceInput{
ResourceArn: &topicArn,
})
if err != nil {
return nil, err
}
for _, tag := range response.Tags {
if util.IsFirstSeenTag(tag.Key) {
firstSeenTime, err := util.ParseTimestamp(tag.Value)
if err != nil {
return nil, errors.WithStackTrace(err)
}
return firstSeenTime, nil
}
}
return nil, nil
}
// setFirstSeenSNSTopic will append a tag to the SNS Topic that details the first seen time.
func (s *SNSTopic) setFirstSeenTag(topicArn string, value time.Time) error {
_, err := s.Client.TagResource(
&sns.TagResourceInput{
ResourceArn: &topicArn,
Tags: []*sns.Tag{
{
Key: aws.String(util.FirstSeenTagKey),
Value: aws.String(util.FormatTimestamp(value)),
},
},
},
)
if err != nil {
return err
}
return nil
}
// shouldIncludeSNS checks if the SNS topic should be included in the nuke list based on the config
func shouldIncludeSNS(topicArn string, excludeAfter, firstSeenTime time.Time, configObj config.Config) bool {
// a topic arn is of the form arn:aws:sns:us-east-1:123456789012:MyTopic
// so we can search for the index of the last colon, then slice the string to get the topic name
nameIndex := strings.LastIndex(topicArn, ":")
topicName := topicArn[nameIndex+1:]
if excludeAfter.Before(firstSeenTime) {
return false
}
return config.ShouldInclude(topicName, configObj.SNS.IncludeRule.NamesRegExp, configObj.SNS.ExcludeRule.NamesRegExp)
}
func (s *SNSTopic) nukeAll(identifiers []*string) error {
if len(identifiers) == 0 {
logging.Debugf("No SNS Topics to nuke in region %s", s.Region)
}
if len(identifiers) > 100 {
logging.Errorf("Nuking too many SNS Topics (100): halting to avoid hitting AWS API rate limiting")
return TooManySNSTopicsErr{}
}
// There is no bulk delete SNS API, so we delete the batch of SNS Topics concurrently using goroutines
logging.Debugf("Deleting SNS Topics in region %s", s.Region)
wg := new(sync.WaitGroup)
wg.Add(len(identifiers))
errChans := make([]chan error, len(identifiers))
for i, topicArn := range identifiers {
errChans[i] = make(chan error, 1)
go s.deleteAsync(wg, errChans[i], topicArn)
}
wg.Wait()
var allErrs *multierror.Error
for _, errChan := range errChans {
if err := <-errChan; err != nil {
allErrs = multierror.Append(allErrs, err)
logging.Errorf("[Failed] %s", err)
}
}
finalErr := allErrs.ErrorOrNil()
if finalErr != nil {
return errors.WithStackTrace(finalErr)
}
return nil
}
func (s *SNSTopic) deleteAsync(wg *sync.WaitGroup, errChan chan error, topicArn *string) {
defer wg.Done()
deleteParam := &sns.DeleteTopicInput{
TopicArn: topicArn,
}
logging.Debugf("Deleting SNS Topic (arn=%s) in region: %s", aws.StringValue(topicArn), s.Region)
_, err := s.Client.DeleteTopic(deleteParam)
errChan <- err
// Record status of this resource
e := report.Entry{
Identifier: *topicArn,
ResourceType: "SNS Topic",
Error: err,
}
report.Record(e)
if err == nil {
logging.Debugf("[OK] Deleted SNS Topic (arn=%s) in region: %s", aws.StringValue(topicArn), s.Region)
} else {
logging.Debugf("[Failed] Error deleting SNS Topic (arn=%s) in %s", aws.StringValue(topicArn), s.Region)
}
}