-
Notifications
You must be signed in to change notification settings - Fork 62
/
01-rc-certificate.yaml
213 lines (184 loc) · 8.31 KB
/
01-rc-certificate.yaml
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
# Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License.
# A copy of the License is located at
# http://aws.amazon.com/apache2.0/
# or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
# either express or implied. See the License for the specific language governing permissions and limitations under the License.
AWSTemplateFormatVersion: 2010-09-09
Description: Request a DNS-validated ACM cert
Parameters:
R53HostedZoneId:
Type: AWS::Route53::HostedZone::Id
Description: >
The Route 53 hosted zone for the domains you are requesting a
certificate for.
R53DomainName:
Type: String
Description: >
Fully qualified domain name (FQDN), such as www.example.com,
that you want to secure with an ACM certificate.
AllowedPattern: '^(\*\.)?(((?!-)[A-Za-z0-9-]{0,62}[A-Za-z0-9])\.)+((?!-)[A-Za-z0-9-]{1,62}[A-Za-z0-9])$'
ConstraintDescription: >
The first domain name you enter cannot exceed 63 octets,
including periods. Each subsequent Subject Alternative Name
(SAN), however, can be up to 253 octets in length.
SubjectAlternativeNames:
Type: CommaDelimitedList
Description: >
Additional FQDNs to be included in the Subject Alternative Name
extension of the ACM certificate. The maximum number of domain
names that you can add to an ACM certificate is 100. However,
the initial limit is 10 domain names. The maximum length of a
SAN DNS name is 253 octets. The name is made up of multiple
labels separated by periods. No label can be longer than 63
octets.
Default: ''
Resources:
DNSValidatedCertificateResourceFunctionPolicy:
Type: AWS::IAM::ManagedPolicy
Properties:
PolicyDocument:
Version: 2012-10-17
Statement:
- Effect: Allow
Action:
- route53:ChangeResourceRecordSets
- route53:ListResourceRecordSets
Resource:
- !Sub 'arn:aws:route53:::hostedzone/${R53HostedZoneId}'
- Effect: Allow
Action:
- acm:DescribeCertificate
- acm:DeleteCertificate
- acm:RequestCertificate
Resource:
- '*'
DNSValidatedCertificateResourceFunctionRole:
Type: AWS::IAM::Role
Properties:
Path: '/'
ManagedPolicyArns:
- arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
- !Ref DNSValidatedCertificateResourceFunctionPolicy
AssumeRolePolicyDocument:
Version: 2012-10-17
Statement:
- Effect: Allow
Principal:
Service: lambda.amazonaws.com
Action:
- sts:AssumeRole
DNSValidatedCertificateResourceFunction:
Type: AWS::Lambda::Function
Properties:
Code:
ZipFile: |
import boto3
import botocore.exceptions
import cfnresponse
import logging
import time
from contextlib import contextmanager
acm = boto3.client('acm')
route53 = boto3.client('route53')
logger = logging.getLogger()
logger.setLevel(logging.INFO)
@contextmanager
def suppress_boto_clienterror(*error_codes):
try:
yield
except botocore.exceptions.ClientError as e:
logger.exception(e)
if e.response['Error']['Code'] not in error_codes:
raise e
class ACMIssuanceError(Exception): pass
def get_validation_resource_records(certificate_arn):
for attempt in range(10):
cert_info = acm.describe_certificate(CertificateArn=certificate_arn)
try:
dvos = cert_info['Certificate']['DomainValidationOptions']
except KeyError:
logger.info('Waiting for validation records, attempt {}'.format(attempt+1))
time.sleep(10)
for attempt in range(10):
try:
return [dvo['ResourceRecord'] for dvo in dvos]
except KeyError:
logger.info('Waiting for validation records, attempt {}'.format(attempt+1))
time.sleep(10)
raise ACMIssuanceError('Timed out waiting for validation records')
def change_records(certificate_arn, hosted_zone_id, action):
for resource_record in get_validation_resource_records(certificate_arn):
logger.info('{}: {}'.format(action, resource_record['Name']))
route53.change_resource_record_sets(
HostedZoneId=hosted_zone_id,
ChangeBatch={
'Changes': [{
'Action': action,
'ResourceRecordSet': {
'Name': resource_record['Name'],
'Type': resource_record['Type'],
'TTL': 60,
'ResourceRecords': [{'Value': resource_record['Value']}]
}
}]
})
def wait_for_issuance(certificate_arn):
for attempt in range(15):
cert_info = acm.describe_certificate(CertificateArn=certificate_arn)
status = cert_info['Certificate']['Status']
if status == 'PENDING_VALIDATION':
logger.info('Waiting for issuance, attempt {}'.format(attempt+1))
time.sleep(20)
continue
if status == 'ISSUED':
logger.info('Certificate issued!')
return
raise ACMIssuanceError('Bad status "{}"'.format(status))
def lambda_handler(event, context):
responseData = {}
resource_id = event.get('PhysicalResourceId')
props = event['ResourceProperties']['Parameters']
try:
if event['RequestType'] == 'Delete':
with suppress_boto_clienterror('InvalidChangeBatch', 'ResourceNotFoundException'):
change_records(resource_id, props['HostedZoneId'], 'DELETE')
acm.delete_certificate(CertificateArn=resource_id)
else:
args = {
'DomainName': props['DomainName'],
'IdempotencyToken': context.aws_request_id.replace('-',''),
'ValidationMethod': 'DNS'
}
san_list = props.get('SubjectAlternativeNames')
if san_list:
args['SubjectAlternativeNames'] = san_list
logger.info(str(args))
resp = acm.request_certificate(**args)
logger.info(str(resp))
resource_id = resp['CertificateArn']
responseData['CertificateArn'] = resource_id
logger.info('Certificate requested: {}'.format(resource_id))
change_records(resource_id, props['HostedZoneId'], 'UPSERT')
wait_for_issuance(resource_id)
except Exception as e:
logger.exception(e)
cfnresponse.send(event, context, cfnresponse.FAILED, responseData, resource_id)
else:
cfnresponse.send(event, context, cfnresponse.SUCCESS, responseData, resource_id)
Handler: index.lambda_handler
Runtime: python3.6
Timeout: 300
Role: !GetAtt DNSValidatedCertificateResourceFunctionRole.Arn
Certificate:
Type: Custom::DNSValidatedCertificate
Properties:
ServiceToken: !GetAtt DNSValidatedCertificateResourceFunction.Arn
Parameters:
HostedZoneId: !Ref R53HostedZoneId
DomainName: !Ref R53DomainName
# SubjectAlternativeNames: !Ref SubjectAlternativeNames
Outputs:
CertificateArn:
Value: !GetAtt Certificate.CertificateArn