def create_cloud_front_template():
template = Template()
template.set_transform('AWS::Serverless-2016-10-31')
bucket = template.add_resource(
resource=Bucket(
title='SampleOriginBucket',
BucketName=Sub('sample-origin-bucket-${AWS::AccountId}')
)
)
identity = template.add_resource(
resource=CloudFrontOriginAccessIdentity(
title='SampleOriginAccessIdentity',
CloudFrontOriginAccessIdentityConfig=CloudFrontOriginAccessIdentityConfig(
Comment='sample-lambda-edge'
)
)
)
template.add_resource(
resource=BucketPolicy(
title='SampleBucketPolicy',
Bucket=Ref(bucket),
PolicyDocument={
'Statement': [{
'Action': 's3:GetObject',
'Effect': 'Allow',
'Resource': Join(delimiter='/', values=[GetAtt(bucket, 'Arn'), '*']),
'Principal': {
'CanonicalUser': GetAtt(logicalName=identity, attrName='S3CanonicalUserId')
}
}]
}
)
)
template.add_resource(
resource=Distribution(
title='SampleDistribution',
DistributionConfig=DistributionConfig(
DefaultCacheBehavior=DefaultCacheBehavior(
ForwardedValues=ForwardedValues(
QueryString=True,
),
LambdaFunctionAssociations=[
LambdaFunctionAssociation(
EventType='viewer-request',
LambdaFunctionARN=Sub([
'${FUNCTION_ARN}:8', {'FUNCTION_ARN': ImportValue(get_export_name())}
]),
)
],
TargetOriginId=Sub('S3-${' + bucket.title + '}'),
ViewerProtocolPolicy='redirect-to-https',
),
Enabled=True,
Origins=[
Origin(
Id=Sub('S3-${' + bucket.title + '}'),
DomainName=Sub('${' + bucket.title + '}.s3.amazonaws.com'),
S3OriginConfig=S3OriginConfig(
OriginAccessIdentity=Sub('origin-access-identity/cloudfront/${' + identity.title + '}')
)
)
],
)
)
)
with open('./cloudfront.yml', mode='w') as file:
file.write(template.to_yaml())
def create_cloudfront_template():
template = Template()
cname = template.add_parameter(
parameter=Parameter(title='Cname', Type='String'))
acm_certificate_arn = template.add_parameter(
parameter=Parameter(title='AcmCertificateArn', Type='String'))
host_zone_id = template.add_parameter(
parameter=Parameter(title='HostZoneId', Type='String'))
bucket = template.add_resource(
resource=Bucket(title='SampleBucket',
BucketName=Sub('sample-bucket-${AWS::AccountId}')))
identity = template.add_resource(resource=CloudFrontOriginAccessIdentity(
title='SampleOriginAccessIdentity',
CloudFrontOriginAccessIdentityConfig=
CloudFrontOriginAccessIdentityConfig(Comment='sample')))
template.add_resource(resource=BucketPolicy(
title='SampleBucketPolicy',
Bucket=Ref(bucket),
PolicyDocument={
'Statement': [{
'Action':
's3:GetObject',
'Effect':
'Allow',
'Resource':
Join(delimiter='/', values=[GetAtt(bucket, 'Arn'), '*']),
'Principal': {
'CanonicalUser':
GetAtt(logicalName=identity, attrName='S3CanonicalUserId')
}
}]
}))
distribution = template.add_resource(resource=Distribution(
title='SampleDistribution',
DistributionConfig=DistributionConfig(
Aliases=[Ref(cname)],
# CustomErrorResponses=[
# CustomErrorResponse(
# ErrorCode=403,
# ResponseCode=200,
# ResponsePagePath='/404.html',
# ErrorCachingMinTTL=30
# )
# ],
DefaultCacheBehavior=DefaultCacheBehavior(
ForwardedValues=ForwardedValues(QueryString=True, ),
TargetOriginId=Sub('S3-${' + bucket.title + '}'),
ViewerProtocolPolicy='redirect-to-https',
),
# DefaultRootObject='index.html',
Enabled=True,
Origins=[
Origin(Id=Sub('S3-${' + bucket.title + '}'),
DomainName=Sub('${' + bucket.title +
'}.s3.amazonaws.com'),
S3OriginConfig=S3OriginConfig(OriginAccessIdentity=Sub(
'origin-access-identity/cloudfront/${' +
identity.title + '}')))
],
ViewerCertificate=ViewerCertificate(AcmCertificateArn=Ref(
acm_certificate_arn),
SslSupportMethod='sni-only'))))
template.add_resource(resource=RecordSetType(
title='SampleRecordSet',
AliasTarget=AliasTarget(HostedZoneId='Z2FDTNDATAQYW2',
DNSName=GetAtt(logicalName=distribution,
attrName='DomainName')),
HostedZoneId=Ref(host_zone_id),
Name=Ref(cname),
Type='A'))
with open('./cloudfront.yml', mode='w') as file:
file.write(template.to_yaml())
SslSupportMethod='sni-only',
),
If(
assets_certificate_arn_condition,
ViewerCertificate(
AcmCertificateArn=Ref(assets_certificate_arn),
SslSupportMethod='sni-only',
),
Ref("AWS::NoValue"),
),
),
Origins=[
Origin(
Id="Assets",
DomainName=GetAtt(assets_bucket, "DomainName"),
S3OriginConfig=S3OriginConfig(
OriginAccessIdentity="", ),
)
],
DefaultCacheBehavior=DefaultCacheBehavior(
TargetOriginId="Assets",
ForwardedValues=ForwardedValues(
# Cache results *should* vary based on querystring (e.g., 'style.css?v=3')
QueryString=True,
# make sure headers needed by CORS policy above get through to S3
# http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/header-caching.html#header-caching-web-cors
Headers=[
'Origin',
'Access-Control-Request-Headers',
'Access-Control-Request-Method',
],
),
def generate_template(d):
t = Template()
t.set_description(d["cf_template_description"])
S3bucket = t.add_resource(
Bucket(
"S3Bucket",
BucketName=Join("-", [d["project_name"], d["env"]]),
AccessControl=Private,
PublicAccessBlockConfiguration=PublicAccessBlockConfiguration(
BlockPublicAcls=True,
BlockPublicPolicy=True,
IgnorePublicAcls=True,
RestrictPublicBuckets=True,
),
Tags=Tags(d["tags"], {"Name": d["project_name"]}),
)
)
CFOriginAccessIdentity = t.add_resource(
CloudFrontOriginAccessIdentity(
"CFOriginAccessIdentity",
CloudFrontOriginAccessIdentityConfig=CloudFrontOriginAccessIdentityConfig(
Comment=Join(" ", ["Cloudfront Origin Access Identity", d["project_name"], d["env"]])
),
)
)
t.add_resource(
BucketPolicy(
"BucketPolicy",
Bucket=Ref("S3Bucket"),
PolicyDocument=dict(
Statement=[
dict(
Sid="Allow-cf",
Effect="Allow",
Action=[
"s3:GetObject",
"s3:ListBucket"
],
Principal=Principal(
"CanonicalUser",
GetAtt(CFOriginAccessIdentity, "S3CanonicalUserId")
),
Resource=[
Join("", ["arn:aws:s3:::", Ref("S3Bucket"), "/*"]),
Join("", ["arn:aws:s3:::", Ref("S3Bucket")]),
]
)
]
)
)
)
myDistribution = t.add_resource(
Distribution(
"myDistribution",
DistributionConfig=DistributionConfig(
Enabled=True,
HttpVersion='http2',
DefaultRootObject=d['default_root_object'],
Origins=[Origin(
Id=Join("-", [d["project_name"], d["env"]]),
DomainName=GetAtt(S3bucket, "DomainName"),
S3OriginConfig=S3OriginConfig(
OriginAccessIdentity=Join("/",["origin-access-identity", "cloudfront", Ref(CFOriginAccessIdentity)])
)
)],
DefaultCacheBehavior=DefaultCacheBehavior(
TargetOriginId=Join("-", [d["project_name"], d["env"]]),
ForwardedValues=ForwardedValues(
QueryString=False
),
ViewerProtocolPolicy="allow-all",
MaxTTL=0,
MinTTL=0,
DefaultTTL=0,
),
CustomErrorResponses=[CustomErrorResponse(
ErrorCachingMinTTL=0,
ErrorCode=404,
ResponsePagePath=Join("",["/", d['default_root_object']]),
ResponseCode=200,
)],
ViewerCertificate=ViewerCertificate(
CloudFrontDefaultCertificate=True
),
),
Tags=Tags(d["tags"], {"Name": d["project_name"]}),
)
)
t.add_output(Output(
"BucketName",
Value=Ref(S3bucket),
Description="Name of S3 bucket to hold website content"
))
t.add_output([
Output("DistributionId", Value=Ref(myDistribution)),
Output(
"DistributionName",
Value=Join("", ["http://", GetAtt(myDistribution, "DomainName")])),
])
return t
def create_cloud_front_template():
template = Template()
bucket = template.add_resource(
resource=Bucket(
title='SampleBucket',
BucketName=Sub('sample-bucket-${AWS::AccountId}')
)
)
identity = template.add_resource(
resource=CloudFrontOriginAccessIdentity(
title='SampleOriginAccessIdentity',
CloudFrontOriginAccessIdentityConfig=CloudFrontOriginAccessIdentityConfig(
Comment='sample'
)
)
)
template.add_resource(
resource=BucketPolicy(
title='SampleBucketPolicy',
Bucket=Ref(bucket),
PolicyDocument={
'Statement': [{
'Action': 's3:GetObject',
'Effect': 'Allow',
'Resource': Join(delimiter='/', values=[GetAtt(bucket, 'Arn'), '*']),
'Principal': {
'CanonicalUser': GetAtt(logicalName=identity, attrName='S3CanonicalUserId')
}
}]
}
)
)
template.add_resource(
resource=Distribution(
title='SampleDistribution',
DistributionConfig=DistributionConfig(
Enabled=True,
Origins=[
Origin(
Id=Sub('S3-${' + bucket.title + '}'),
DomainName=Sub('${' + bucket.title + '}.s3.amazonaws.com'),
S3OriginConfig=S3OriginConfig(
OriginAccessIdentity=Sub('origin-access-identity/cloudfront/${' + identity.title + '}')
)
)
],
DefaultCacheBehavior=DefaultCacheBehavior(
ForwardedValues=ForwardedValues(
QueryString=True,
),
TargetOriginId=Sub('S3-${' + bucket.title + '}'),
ViewerProtocolPolicy='redirect-to-https',
),
DefaultRootObject='index.html',
CustomErrorResponses=[
CustomErrorResponse(
ErrorCode=403,
ResponseCode=200,
ResponsePagePath='/404.html',
ErrorCachingMinTTL=30
)
]
)
)
)
with open('./cloudfront.yml', mode='w') as file:
file.write(template.to_yaml())
IPV6Enabled=True,
Origins=[
Origin(
Id='S3',
DomainName=Join('', [
ImportValue(
Join('-', [
Ref(video_engine_stack), 'VideoBucket', 'Ref'
])), '.s3.',
Ref(AWS_REGION), '.amazonaws.com'
]),
S3OriginConfig=S3OriginConfig(OriginAccessIdentity=Join(
'', [
'origin-access-identity/cloudfront/',
ImportValue(
Join('-', [
Ref(video_engine_stack),
'VideoOriginAccessIdentity', 'Ref'
])),
]), ),
)
],
PriceClass='PriceClass_100',
ViewerCertificate=ViewerCertificate(
AcmCertificateArn=Ref(cloudfront_certificate),
SslSupportMethod='sni-only',
MinimumProtocolVersion=
'TLSv1.1_2016', # We might need to raise this
),
),
))
ForwardedValues=ForwardedValues(QueryString=False, ),
),
DefaultRootObject='index.html',
Enabled=True,
HttpVersion='http2',
IPV6Enabled=True,
Origins=[
Origin(
Id='default',
DomainName=Join('', [
Ref(s3_website_origin), '.s3.',
Ref(AWS_REGION), '.amazonaws.com'
]),
S3OriginConfig=S3OriginConfig(OriginAccessIdentity=Join(
'', [
'origin-access-identity/cloudfront/',
Ref(origin_access_identity),
]), ),
)
],
PriceClass='PriceClass_100',
ViewerCertificate=ViewerCertificate(
AcmCertificateArn=Ref(cloudfront_certificate),
SslSupportMethod='sni-only',
),
CustomErrorResponses=[
CustomErrorResponse(ErrorCode=403,
ResponseCode=200,
ResponsePagePath='/404.html'),
],
),
Parameter(
"S3DNSName",
Description="The DNS name of an existing S3 bucket to use as the "
"Cloudfront distribution origin",
Type="String",
))
myDistribution = t.add_resource(
Distribution(
"myDistribution",
DistributionConfig=DistributionConfig(
Origins=[
Origin(
Id="Origin 1",
DomainName=Ref(s3dnsname),
S3OriginConfig=S3OriginConfig(),
)
],
DefaultCacheBehavior=DefaultCacheBehavior(
TargetOriginId="Origin 1",
ForwardedValues=ForwardedValues(QueryString=False),
ViewerProtocolPolicy="allow-all",
),
Enabled=True,
HttpVersion="http2",
),
))
t.add_output([
Output("DistributionId", Value=Ref(myDistribution)),
Output(
def create_template():
template = Template(Description=(
"Static website hosted with S3 and CloudFront. "
"https://github.com/schlarpc/overengineered-cloudfront-s3-static-website"
))
partition_config = add_mapping(
template,
"PartitionConfig",
{
"aws": {
# the region with the control plane for CloudFront, IAM, Route 53, etc
"PrimaryRegion":
"us-east-1",
# assume that Lambda@Edge replicates to all default enabled regions, and that
# future regions will be opt-in. generated with AWS CLI:
# aws ec2 describe-regions --all-regions --query "Regions[?OptInStatus=='opt-in-not-required'].RegionName|sort(@)"
"DefaultRegions": [
"ap-northeast-1",
"ap-northeast-2",
"ap-northeast-3",
"ap-south-1",
"ap-southeast-1",
"ap-southeast-2",
"ca-central-1",
"eu-central-1",
"eu-north-1",
"eu-west-1",
"eu-west-2",
"eu-west-3",
"sa-east-1",
"us-east-1",
"us-east-2",
"us-west-1",
"us-west-2",
],
},
# this doesn't actually work, because Lambda@Edge isn't supported in aws-cn
"aws-cn": {
"PrimaryRegion": "cn-north-1",
"DefaultRegions": ["cn-north-1", "cn-northwest-1"],
},
},
)
acm_certificate_arn = template.add_parameter(
Parameter(
"AcmCertificateArn",
Description=
"Existing ACM certificate to use for serving TLS. Overrides HostedZoneId.",
Type="String",
AllowedPattern="(arn:[^:]+:acm:[^:]+:[^:]+:certificate/.+|)",
Default="",
))
hosted_zone_id = template.add_parameter(
Parameter(
"HostedZoneId",
Description=
"Existing Route 53 zone to use for validating a new TLS certificate.",
Type="String",
AllowedPattern="(Z[A-Z0-9]+|)",
Default="",
))
dns_names = template.add_parameter(
Parameter(
"DomainNames",
Description=
"Comma-separated list of additional domain names to serve.",
Type="CommaDelimitedList",
Default="",
))
tls_protocol_version = template.add_parameter(
Parameter(
"TlsProtocolVersion",
Description=
"CloudFront TLS security policy; see https://amzn.to/2DR91Xq for details.",
Type="String",
Default="TLSv1.2_2019",
))
log_retention_days = template.add_parameter(
Parameter(
"LogRetentionDays",
Description=
"Days to keep CloudFront, S3, and Lambda logs. 0 means indefinite retention.",
Type="Number",
AllowedValues=[0] + CLOUDWATCH_LOGS_RETENTION_OPTIONS,
Default=365,
))
default_ttl_seconds = template.add_parameter(
Parameter(
"DefaultTtlSeconds",
Description="Cache time-to-live when not set by S3 object headers.",
Type="Number",
Default=int(datetime.timedelta(minutes=5).total_seconds()),
))
enable_price_class_hack = template.add_parameter(
Parameter(
"EnablePriceClassHack",
Description="Cut your bill in half with this one weird trick.",
Type="String",
Default="false",
AllowedValues=["true", "false"],
))
retention_defined = add_condition(template, "RetentionDefined",
Not(Equals(Ref(log_retention_days), 0)))
using_price_class_hack = add_condition(
template, "UsingPriceClassHack",
Equals(Ref(enable_price_class_hack), "true"))
using_acm_certificate = add_condition(
template, "UsingAcmCertificate",
Not(Equals(Ref(acm_certificate_arn), "")))
using_hosted_zone = add_condition(template, "UsingHostedZone",
Not(Equals(Ref(hosted_zone_id), "")))
using_certificate = add_condition(
template,
"UsingCertificate",
Or(Condition(using_acm_certificate), Condition(using_hosted_zone)),
)
should_create_certificate = add_condition(
template,
"ShouldCreateCertificate",
And(Condition(using_hosted_zone),
Not(Condition(using_acm_certificate))),
)
using_dns_names = add_condition(template, "UsingDnsNames",
Not(Equals(Select(0, Ref(dns_names)), "")))
is_primary_region = "IsPrimaryRegion"
template.add_condition(
is_primary_region,
Equals(Region, FindInMap(partition_config, Partition,
"PrimaryRegion")),
)
precondition_region_is_primary = template.add_resource(
WaitConditionHandle(
"PreconditionIsPrimaryRegionForPartition",
Condition=is_primary_region,
))
log_ingester_dlq = template.add_resource(
Queue(
"LogIngesterDLQ",
MessageRetentionPeriod=int(
datetime.timedelta(days=14).total_seconds()),
KmsMasterKeyId="alias/aws/sqs",
))
log_ingester_role = template.add_resource(
Role(
"LogIngesterRole",
AssumeRolePolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect="Allow",
Principal=Principal("Service", "lambda.amazonaws.com"),
Action=[sts.AssumeRole],
)
],
),
Policies=[
PolicyProperty(
PolicyName="DLQPolicy",
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Action=[sqs.SendMessage],
Resource=[GetAtt(log_ingester_dlq, "Arn")],
)
],
),
)
],
))
log_ingester = template.add_resource(
Function(
"LogIngester",
Runtime=PYTHON_RUNTIME,
Handler="index.{}".format(log_ingest.handler.__name__),
Code=Code(ZipFile=inspect.getsource(log_ingest)),
MemorySize=256,
Timeout=300,
Role=GetAtt(log_ingester_role, "Arn"),
DeadLetterConfig=DeadLetterConfig(
TargetArn=GetAtt(log_ingester_dlq, "Arn")),
))
log_ingester_permission = template.add_resource(
Permission(
"LogIngesterPermission",
FunctionName=GetAtt(log_ingester, "Arn"),
Action="lambda:InvokeFunction",
Principal="s3.amazonaws.com",
SourceAccount=AccountId,
))
log_bucket = template.add_resource(
Bucket(
"LogBucket",
# S3 requires this ACL (regardless of bucket policy) or s3:PutBucketLogging fails.
# When the CloudFront distribution is created, it adds an additional bucket ACL.
# That ACL is not possible to model in CloudFormation.
AccessControl="LogDeliveryWrite",
LifecycleConfiguration=LifecycleConfiguration(Rules=[
LifecycleRule(ExpirationInDays=1, Status="Enabled"),
LifecycleRule(
AbortIncompleteMultipartUpload=
AbortIncompleteMultipartUpload(DaysAfterInitiation=1),
Status="Enabled",
),
]),
NotificationConfiguration=NotificationConfiguration(
LambdaConfigurations=[
LambdaConfigurations(Event="s3:ObjectCreated:*",
Function=GetAtt(log_ingester, "Arn"))
]),
BucketEncryption=BucketEncryption(
ServerSideEncryptionConfiguration=[
ServerSideEncryptionRule(
ServerSideEncryptionByDefault=
ServerSideEncryptionByDefault(
# if we use KMS, we can't read the logs
SSEAlgorithm="AES256"))
]),
OwnershipControls=OwnershipControls(Rules=[
OwnershipControlsRule(ObjectOwnership="BucketOwnerPreferred")
], ),
PublicAccessBlockConfiguration=PublicAccessBlockConfiguration(
BlockPublicAcls=True,
BlockPublicPolicy=True,
IgnorePublicAcls=True,
RestrictPublicBuckets=True,
),
DependsOn=[log_ingester_permission],
))
log_ingester_log_group = template.add_resource(
LogGroup(
"LogIngesterLogGroup",
LogGroupName=Join(
"", ["/aws/lambda/", Ref(log_ingester)]),
RetentionInDays=If(retention_defined, Ref(log_retention_days),
NoValue),
))
log_ingester_policy = template.add_resource(
PolicyType(
"LogIngesterPolicy",
Roles=[Ref(log_ingester_role)],
PolicyName="IngestLogPolicy",
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Action=[logs.CreateLogStream, logs.PutLogEvents],
Resource=[
Join(
":",
[
"arn",
Partition,
"logs",
Region,
AccountId,
"log-group",
"/aws/cloudfront/*",
],
),
Join(
":",
[
"arn",
Partition,
"logs",
Region,
AccountId,
"log-group",
"/aws/s3/*",
],
),
GetAtt(log_ingester_log_group, "Arn"),
],
),
Statement(
Effect=Allow,
Action=[s3.GetObject],
Resource=[Join("", [GetAtt(log_bucket, "Arn"), "/*"])],
),
],
),
))
bucket = template.add_resource(
Bucket(
"ContentBucket",
LifecycleConfiguration=LifecycleConfiguration(Rules=[
# not supported by CFN yet:
# LifecycleRule(
# Transitions=[
# LifecycleRuleTransition(
# StorageClass='INTELLIGENT_TIERING',
# TransitionInDays=1,
# ),
# ],
# Status="Enabled",
# ),
LifecycleRule(
AbortIncompleteMultipartUpload=
AbortIncompleteMultipartUpload(DaysAfterInitiation=7),
Status="Enabled",
)
]),
LoggingConfiguration=LoggingConfiguration(
DestinationBucketName=Ref(log_bucket), LogFilePrefix="s3/"),
BucketEncryption=BucketEncryption(
ServerSideEncryptionConfiguration=[
ServerSideEncryptionRule(
ServerSideEncryptionByDefault=
ServerSideEncryptionByDefault(
# Origin Access Identities can't use KMS
SSEAlgorithm="AES256"))
]),
OwnershipControls=OwnershipControls(Rules=[
OwnershipControlsRule(ObjectOwnership="BucketOwnerPreferred")
], ),
PublicAccessBlockConfiguration=PublicAccessBlockConfiguration(
BlockPublicAcls=True,
BlockPublicPolicy=True,
IgnorePublicAcls=True,
RestrictPublicBuckets=True,
),
))
origin_access_identity = template.add_resource(
CloudFrontOriginAccessIdentity(
"CloudFrontIdentity",
CloudFrontOriginAccessIdentityConfig=
CloudFrontOriginAccessIdentityConfig(
Comment=GetAtt(bucket, "Arn")),
))
bucket_policy = template.add_resource(
BucketPolicy(
"ContentBucketPolicy",
Bucket=Ref(bucket),
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Principal=Principal(
"CanonicalUser",
GetAtt(origin_access_identity,
"S3CanonicalUserId"),
),
Action=[s3.GetObject],
Resource=[Join("", [GetAtt(bucket, "Arn"), "/*"])],
),
],
),
))
# Not strictly necessary, as ACLs should take care of this access. However, CloudFront docs
# state "In some circumstances [...] S3 resets permissions on the bucket to the default value",
# and this allows logging to work without any ACLs in place.
log_bucket_policy = template.add_resource(
BucketPolicy(
"LogBucketPolicy",
Bucket=Ref(log_bucket),
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Principal=Principal("Service",
"delivery.logs.amazonaws.com"),
Action=[s3.PutObject],
Resource=[
Join(
"/",
[GetAtt(log_bucket, "Arn"), "cloudfront", "*"])
],
),
Statement(
Effect=Allow,
Principal=Principal("Service",
"delivery.logs.amazonaws.com"),
Action=[s3.ListBucket],
Resource=[Join("/", [GetAtt(log_bucket, "Arn")])],
),
Statement(
Effect=Allow,
Principal=Principal("Service", "s3.amazonaws.com"),
Action=[s3.PutObject],
Resource=[
Join("/", [GetAtt(log_bucket, "Arn"), "s3", "*"])
],
),
],
),
))
certificate_validator_dlq = template.add_resource(
Queue(
"CertificateValidatorDLQ",
MessageRetentionPeriod=int(
datetime.timedelta(days=14).total_seconds()),
KmsMasterKeyId="alias/aws/sqs",
Condition=should_create_certificate,
))
certificate_validator_role = template.add_resource(
Role(
"CertificateValidatorRole",
AssumeRolePolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect="Allow",
Principal=Principal("Service", "lambda.amazonaws.com"),
Action=[sts.AssumeRole],
)
],
),
Policies=[
PolicyProperty(
PolicyName="DLQPolicy",
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Action=[sqs.SendMessage],
Resource=[
GetAtt(certificate_validator_dlq, "Arn")
],
)
],
),
)
],
# TODO scope down
ManagedPolicyArns=[
"arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole",
"arn:aws:iam::aws:policy/AmazonRoute53FullAccess",
"arn:aws:iam::aws:policy/AWSCertificateManagerReadOnly",
],
Condition=should_create_certificate,
))
certificate_validator_function = template.add_resource(
Function(
"CertificateValidatorFunction",
Runtime=PYTHON_RUNTIME,
Handler="index.{}".format(certificate_validator.handler.__name__),
Code=Code(ZipFile=inspect.getsource(certificate_validator)),
MemorySize=256,
Timeout=300,
Role=GetAtt(certificate_validator_role, "Arn"),
DeadLetterConfig=DeadLetterConfig(
TargetArn=GetAtt(certificate_validator_dlq, "Arn")),
Environment=Environment(
Variables={
certificate_validator.EnvVars.HOSTED_ZONE_ID.name:
Ref(hosted_zone_id)
}),
Condition=should_create_certificate,
))
certificate_validator_log_group = template.add_resource(
LogGroup(
"CertificateValidatorLogGroup",
LogGroupName=Join(
"", ["/aws/lambda/",
Ref(certificate_validator_function)]),
RetentionInDays=If(retention_defined, Ref(log_retention_days),
NoValue),
Condition=should_create_certificate,
))
certificate_validator_rule = template.add_resource(
Rule(
"CertificateValidatorRule",
EventPattern={
"detail-type": ["AWS API Call via CloudTrail"],
"detail": {
"eventSource": ["acm.amazonaws.com"],
"eventName": ["AddTagsToCertificate"],
"requestParameters": {
"tags": {
"key": [certificate_validator_function.title],
"value":
[GetAtt(certificate_validator_function, "Arn")],
}
},
},
},
Targets=[
Target(
Id="certificate-validator-lambda",
Arn=GetAtt(certificate_validator_function, "Arn"),
)
],
DependsOn=[certificate_validator_log_group],
Condition=should_create_certificate,
))
certificate_validator_permission = template.add_resource(
Permission(
"CertificateValidatorPermission",
FunctionName=GetAtt(certificate_validator_function, "Arn"),
Action="lambda:InvokeFunction",
Principal="events.amazonaws.com",
SourceArn=GetAtt(certificate_validator_rule, "Arn"),
Condition=should_create_certificate,
))
certificate = template.add_resource(
Certificate(
"Certificate",
DomainName=Select(0, Ref(dns_names)),
SubjectAlternativeNames=Ref(
dns_names), # duplicate first name works fine
ValidationMethod="DNS",
Tags=Tags(
**{
certificate_validator_function.title:
GetAtt(certificate_validator_function, "Arn")
}),
DependsOn=[certificate_validator_permission],
Condition=should_create_certificate,
))
edge_hook_role = template.add_resource(
Role(
"EdgeHookRole",
AssumeRolePolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect="Allow",
Principal=Principal(
"Service",
[
"lambda.amazonaws.com",
"edgelambda.amazonaws.com"
],
),
Action=[sts.AssumeRole],
)
],
),
))
edge_hook_function = template.add_resource(
Function(
"EdgeHookFunction",
Runtime=PYTHON_RUNTIME,
Handler="index.handler",
Code=Code(ZipFile=inspect.getsource(edge_hook)),
MemorySize=128,
Timeout=3,
Role=GetAtt(edge_hook_role, "Arn"),
))
edge_hook_function_hash = (hashlib.sha256(
json.dumps(edge_hook_function.to_dict(),
sort_keys=True).encode("utf-8")).hexdigest()[:10].upper())
edge_hook_version = template.add_resource(
Version(
"EdgeHookVersion" + edge_hook_function_hash,
FunctionName=GetAtt(edge_hook_function, "Arn"),
))
replica_log_group_name = Join(
"/",
[
"/aws/lambda",
Join(
".",
[
FindInMap(partition_config, Partition, "PrimaryRegion"),
Ref(edge_hook_function),
],
),
],
)
edge_hook_role_policy = template.add_resource(
PolicyType(
"EdgeHookRolePolicy",
PolicyName="write-logs",
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Action=[logs.CreateLogStream, logs.PutLogEvents],
Resource=[
Join(
":",
[
"arn",
Partition,
"logs",
"*",
AccountId,
"log-group",
replica_log_group_name,
"log-stream",
"*",
],
),
],
),
],
),
Roles=[Ref(edge_hook_role)],
))
stack_set_administration_role = template.add_resource(
Role(
"StackSetAdministrationRole",
AssumeRolePolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Principal=Principal("Service",
"cloudformation.amazonaws.com"),
Action=[sts.AssumeRole],
),
],
),
))
stack_set_execution_role = template.add_resource(
Role(
"StackSetExecutionRole",
AssumeRolePolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Principal=Principal(
"AWS", GetAtt(stack_set_administration_role,
"Arn")),
Action=[sts.AssumeRole],
),
],
),
Policies=[
PolicyProperty(
PolicyName="create-stackset-instances",
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Action=[
cloudformation.DescribeStacks,
logs.DescribeLogGroups,
],
Resource=["*"],
),
# stack instances communicate with the CFN service via SNS
Statement(
Effect=Allow,
Action=[sns.Publish],
NotResource=[
Join(
":",
[
"arn", Partition, "sns", "*",
AccountId, "*"
],
)
],
),
Statement(
Effect=Allow,
Action=[
logs.CreateLogGroup,
logs.DeleteLogGroup,
logs.PutRetentionPolicy,
logs.DeleteRetentionPolicy,
],
Resource=[
Join(
":",
[
"arn",
Partition,
"logs",
"*",
AccountId,
"log-group",
replica_log_group_name,
"log-stream",
"",
],
),
],
),
Statement(
Effect=Allow,
Action=[
cloudformation.CreateStack,
cloudformation.DeleteStack,
cloudformation.UpdateStack,
],
Resource=[
Join(
":",
[
"arn",
Partition,
"cloudformation",
"*",
AccountId,
Join(
"/",
[
"stack",
Join(
"-",
[
"StackSet",
StackName, "*"
],
),
],
),
],
)
],
),
],
),
),
],
))
stack_set_administration_role_policy = template.add_resource(
PolicyType(
"StackSetAdministrationRolePolicy",
PolicyName="assume-execution-role",
PolicyDocument=PolicyDocument(
Version="2012-10-17",
Statement=[
Statement(
Effect=Allow,
Action=[sts.AssumeRole],
Resource=[GetAtt(stack_set_execution_role, "Arn")],
),
],
),
Roles=[Ref(stack_set_administration_role)],
))
edge_log_groups = template.add_resource(
StackSet(
"EdgeLambdaLogGroupStackSet",
AdministrationRoleARN=GetAtt(stack_set_administration_role, "Arn"),
ExecutionRoleName=Ref(stack_set_execution_role),
StackSetName=Join("-", [StackName, "EdgeLambdaLogGroup"]),
PermissionModel="SELF_MANAGED",
Description="Multi-region log groups for Lambda@Edge replicas",
Parameters=[
StackSetParameter(
ParameterKey="LogGroupName",
ParameterValue=replica_log_group_name,
),
StackSetParameter(
ParameterKey="LogRetentionDays",
ParameterValue=Ref(log_retention_days),
),
],
OperationPreferences=OperationPreferences(
FailureToleranceCount=0,
MaxConcurrentPercentage=100,
),
StackInstancesGroup=[
StackInstances(
DeploymentTargets=DeploymentTargets(Accounts=[AccountId]),
Regions=FindInMap(partition_config, Partition,
"DefaultRegions"),
)
],
TemplateBody=create_log_group_template().to_json(indent=None),
DependsOn=[stack_set_administration_role_policy],
))
price_class_distribution = template.add_resource(
Distribution(
"PriceClassDistribution",
DistributionConfig=DistributionConfig(
Comment="Dummy distribution used for price class hack",
DefaultCacheBehavior=DefaultCacheBehavior(
TargetOriginId="default",
ViewerProtocolPolicy="allow-all",
ForwardedValues=ForwardedValues(QueryString=False),
),
Enabled=True,
Origins=[
Origin(Id="default",
DomainName=GetAtt(bucket, "DomainName"))
],
IPV6Enabled=True,
ViewerCertificate=ViewerCertificate(
CloudFrontDefaultCertificate=True),
PriceClass="PriceClass_All",
),
Condition=using_price_class_hack,
))
distribution = template.add_resource(
Distribution(
"ContentDistribution",
DistributionConfig=DistributionConfig(
Enabled=True,
Aliases=If(using_dns_names, Ref(dns_names), NoValue),
Logging=Logging(Bucket=GetAtt(log_bucket, "DomainName"),
Prefix="cloudfront/"),
DefaultRootObject="index.html",
Origins=[
Origin(
Id="default",
DomainName=GetAtt(bucket, "DomainName"),
S3OriginConfig=S3OriginConfig(
OriginAccessIdentity=Join(
"",
[
"origin-access-identity/cloudfront/",
Ref(origin_access_identity),
],
)),
)
],
DefaultCacheBehavior=DefaultCacheBehavior(
TargetOriginId="default",
Compress=True,
ForwardedValues=ForwardedValues(QueryString=False),
ViewerProtocolPolicy="redirect-to-https",
DefaultTTL=Ref(default_ttl_seconds),
LambdaFunctionAssociations=[
LambdaFunctionAssociation(
EventType="origin-request",
LambdaFunctionARN=Ref(edge_hook_version),
)
],
),
HttpVersion="http2",
IPV6Enabled=True,
ViewerCertificate=ViewerCertificate(
AcmCertificateArn=If(
using_acm_certificate,
Ref(acm_certificate_arn),
If(using_hosted_zone, Ref(certificate), NoValue),
),
SslSupportMethod=If(using_certificate, "sni-only",
NoValue),
CloudFrontDefaultCertificate=If(using_certificate, NoValue,
True),
MinimumProtocolVersion=Ref(tls_protocol_version),
),
PriceClass=If(using_price_class_hack, "PriceClass_100",
"PriceClass_All"),
),
DependsOn=[
bucket_policy,
log_ingester_policy,
edge_log_groups,
precondition_region_is_primary,
],
))
distribution_log_group = template.add_resource(
LogGroup(
"DistributionLogGroup",
LogGroupName=Join(
"", ["/aws/cloudfront/", Ref(distribution)]),
RetentionInDays=If(retention_defined, Ref(log_retention_days),
NoValue),
))
bucket_log_group = template.add_resource(
LogGroup(
"BucketLogGroup",
LogGroupName=Join("", ["/aws/s3/", Ref(bucket)]),
RetentionInDays=If(retention_defined, Ref(log_retention_days),
NoValue),
))
template.add_output(Output("DistributionId", Value=Ref(distribution)))
template.add_output(
Output("DistributionDomain", Value=GetAtt(distribution, "DomainName")))
template.add_output(
Output(
"DistributionDnsTarget",
Value=If(
using_price_class_hack,
GetAtt(price_class_distribution, "DomainName"),
GetAtt(distribution, "DomainName"),
),
))
template.add_output(
Output(
"DistributionUrl",
Value=Join("",
["https://",
GetAtt(distribution, "DomainName"), "/"]),
))
template.add_output(Output("ContentBucketArn", Value=GetAtt(bucket,
"Arn")))
return template