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models.py
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models.py
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"""Route53Backend class with methods for supported APIs."""
import itertools
from collections import defaultdict
import re
import string
import random
import uuid
from jinja2 import Template
from moto.route53.exceptions import (
HostedZoneNotEmpty,
InvalidActionValue,
InvalidCloudWatchArn,
LastVPCAssociation,
NoSuchCloudWatchLogsLogGroup,
NoSuchDelegationSet,
NoSuchHealthCheck,
NoSuchHostedZone,
NoSuchQueryLoggingConfig,
PublicZoneVPCAssociation,
QueryLoggingConfigAlreadyExists,
)
from moto.core import BaseBackend, BaseModel, CloudFormationModel, get_account_id
from moto.core.utils import BackendDict
from moto.utilities.paginator import paginate
from .utils import PAGINATION_MODEL
ROUTE53_ID_CHOICE = string.ascii_uppercase + string.digits
def create_route53_zone_id():
# New ID's look like this Z1RWWTK7Y8UDDQ
return "".join([random.choice(ROUTE53_ID_CHOICE) for _ in range(0, 15)])
class DelegationSet(BaseModel):
def __init__(self, caller_reference, name_servers, delegation_set_id):
self.caller_reference = caller_reference
self.name_servers = name_servers or [
"ns-2048.awsdns-64.com",
"ns-2049.awsdns-65.net",
"ns-2050.awsdns-66.org",
"ns-2051.awsdns-67.co.uk",
]
self.id = delegation_set_id or "".join(
[random.choice(ROUTE53_ID_CHOICE) for _ in range(5)]
)
self.location = f"https://route53.amazonaws.com/delegationset/{self.id}"
class HealthCheck(CloudFormationModel):
def __init__(self, health_check_id, caller_reference, health_check_args):
self.id = health_check_id
self.ip_address = health_check_args.get("ip_address")
self.port = health_check_args.get("port") or 80
self.type_ = health_check_args.get("type")
self.resource_path = health_check_args.get("resource_path")
self.fqdn = health_check_args.get("fqdn")
self.search_string = health_check_args.get("search_string")
self.request_interval = health_check_args.get("request_interval") or 30
self.failure_threshold = health_check_args.get("failure_threshold") or 3
self.health_threshold = health_check_args.get("health_threshold")
self.measure_latency = health_check_args.get("measure_latency") or False
self.inverted = health_check_args.get("inverted") or False
self.disabled = health_check_args.get("disabled") or False
self.enable_sni = health_check_args.get("enable_sni") or False
self.children = health_check_args.get("children") or None
self.caller_reference = caller_reference
@property
def physical_resource_id(self):
return self.id
@staticmethod
def cloudformation_name_type():
return None
@staticmethod
def cloudformation_type():
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-route53-healthcheck.html
return "AWS::Route53::HealthCheck"
@classmethod
def create_from_cloudformation_json(
cls, resource_name, cloudformation_json, region_name, **kwargs
):
properties = cloudformation_json["Properties"]["HealthCheckConfig"]
health_check_args = {
"ip_address": properties.get("IPAddress"),
"port": properties.get("Port"),
"type": properties["Type"],
"resource_path": properties.get("ResourcePath"),
"fqdn": properties.get("FullyQualifiedDomainName"),
"search_string": properties.get("SearchString"),
"request_interval": properties.get("RequestInterval"),
"failure_threshold": properties.get("FailureThreshold"),
}
health_check = route53_backend.create_health_check(
caller_reference=resource_name, health_check_args=health_check_args
)
return health_check
def to_xml(self):
template = Template(
"""<HealthCheck>
<Id>{{ health_check.id }}</Id>
<CallerReference>{{ health_check.caller_reference }}</CallerReference>
<HealthCheckConfig>
{% if health_check.type_ != "CALCULATED" %}
<IPAddress>{{ health_check.ip_address }}</IPAddress>
<Port>{{ health_check.port }}</Port>
{% endif %}
<Type>{{ health_check.type_ }}</Type>
{% if health_check.resource_path %}
<ResourcePath>{{ health_check.resource_path }}</ResourcePath>
{% endif %}
{% if health_check.fqdn %}
<FullyQualifiedDomainName>{{ health_check.fqdn }}</FullyQualifiedDomainName>
{% endif %}
{% if health_check.type_ != "CALCULATED" %}
<RequestInterval>{{ health_check.request_interval }}</RequestInterval>
<FailureThreshold>{{ health_check.failure_threshold }}</FailureThreshold>
<MeasureLatency>{{ health_check.measure_latency }}</MeasureLatency>
{% endif %}
{% if health_check.type_ == "CALCULATED" %}
<HealthThreshold>{{ health_check.health_threshold }}</HealthThreshold>
{% endif %}
<Inverted>{{ health_check.inverted }}</Inverted>
<Disabled>{{ health_check.disabled }}</Disabled>
<EnableSNI>{{ health_check.enable_sni }}</EnableSNI>
{% if health_check.search_string %}
<SearchString>{{ health_check.search_string }}</SearchString>
{% endif %}
{% if health_check.children %}
<ChildHealthChecks>
{% for child in health_check.children %}
<member>{{ child }}</member>
{% endfor %}
</ChildHealthChecks>
{% endif %}
</HealthCheckConfig>
<HealthCheckVersion>1</HealthCheckVersion>
</HealthCheck>"""
)
return template.render(health_check=self)
class RecordSet(CloudFormationModel):
def __init__(self, kwargs):
self.name = kwargs.get("Name")
self.type_ = kwargs.get("Type")
self.ttl = kwargs.get("TTL", 0)
self.records = kwargs.get("ResourceRecords", [])
self.set_identifier = kwargs.get("SetIdentifier")
self.weight = kwargs.get("Weight", 0)
self.region = kwargs.get("Region")
self.health_check = kwargs.get("HealthCheckId")
self.hosted_zone_name = kwargs.get("HostedZoneName")
self.hosted_zone_id = kwargs.get("HostedZoneId")
self.alias_target = kwargs.get("AliasTarget", [])
self.failover = kwargs.get("Failover", [])
self.geo_location = kwargs.get("GeoLocation", [])
@staticmethod
def cloudformation_name_type():
return "Name"
@staticmethod
def cloudformation_type():
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-route53-recordset.html
return "AWS::Route53::RecordSet"
@classmethod
def create_from_cloudformation_json(
cls, resource_name, cloudformation_json, region_name, **kwargs
):
properties = cloudformation_json["Properties"]
zone_name = properties.get("HostedZoneName")
if zone_name:
hosted_zone = route53_backend.get_hosted_zone_by_name(zone_name)
else:
hosted_zone = route53_backend.get_hosted_zone(properties["HostedZoneId"])
record_set = hosted_zone.add_rrset(properties)
return record_set
@classmethod
def update_from_cloudformation_json(
cls, original_resource, new_resource_name, cloudformation_json, region_name
):
cls.delete_from_cloudformation_json(
original_resource.name, cloudformation_json, region_name
)
return cls.create_from_cloudformation_json(
new_resource_name, cloudformation_json, region_name
)
@classmethod
def delete_from_cloudformation_json(
cls, resource_name, cloudformation_json, region_name
):
# this will break if you changed the zone the record is in,
# unfortunately
properties = cloudformation_json["Properties"]
zone_name = properties.get("HostedZoneName")
if zone_name:
hosted_zone = route53_backend.get_hosted_zone_by_name(zone_name)
else:
hosted_zone = route53_backend.get_hosted_zone(properties["HostedZoneId"])
try:
hosted_zone.delete_rrset({"Name": resource_name})
except KeyError:
pass
@property
def physical_resource_id(self):
return self.name
def delete(self, *args, **kwargs): # pylint: disable=unused-argument
"""Not exposed as part of the Route 53 API - used for CloudFormation. args are ignored"""
hosted_zone = route53_backend.get_hosted_zone_by_name(self.hosted_zone_name)
if not hosted_zone:
hosted_zone = route53_backend.get_hosted_zone(self.hosted_zone_id)
hosted_zone.delete_rrset({"Name": self.name, "Type": self.type_})
def reverse_domain_name(domain_name):
if domain_name.endswith("."): # normalize without trailing dot
domain_name = domain_name[:-1]
return ".".join(reversed(domain_name.split(".")))
class FakeZone(CloudFormationModel):
def __init__(
self,
name,
id_,
private_zone,
comment=None,
delegation_set=None,
):
self.name = name
self.id = id_
self.vpcs = []
if comment is not None:
self.comment = comment
self.private_zone = private_zone
self.rrsets = []
self.delegation_set = delegation_set
def add_rrset(self, record_set):
record_set = RecordSet(record_set)
self.rrsets.append(record_set)
return record_set
def upsert_rrset(self, record_set):
new_rrset = RecordSet(record_set)
for i, rrset in enumerate(self.rrsets):
if (
rrset.name == new_rrset.name
and rrset.type_ == new_rrset.type_
and rrset.set_identifier == new_rrset.set_identifier
):
self.rrsets[i] = new_rrset
break
else:
self.rrsets.append(new_rrset)
return new_rrset
def delete_rrset(self, rrset):
self.rrsets = [
record_set
for record_set in self.rrsets
if record_set.name != rrset["Name"]
or (rrset.get("Type") is not None and record_set.type_ != rrset["Type"])
]
def delete_rrset_by_id(self, set_identifier):
self.rrsets = [
record_set
for record_set in self.rrsets
if record_set.set_identifier != set_identifier
]
def add_vpc(self, vpc_id, vpc_region):
vpc = {}
if vpc_id is not None:
vpc["vpc_id"] = vpc_id
if vpc_region is not None:
vpc["vpc_region"] = vpc_region
if vpc_id or vpc_region:
self.vpcs.append(vpc)
return vpc
def delete_vpc(self, vpc_id):
self.vpcs = [vpc for vpc in self.vpcs if vpc["vpc_id"] != vpc_id]
def get_record_sets(self, start_type, start_name):
def predicate(rrset):
rrset_name_reversed = reverse_domain_name(rrset.name)
start_name_reversed = reverse_domain_name(start_name)
return rrset_name_reversed < start_name_reversed or (
rrset_name_reversed == start_name_reversed and rrset.type_ < start_type
)
record_sets = sorted(
self.rrsets,
key=lambda rrset: (reverse_domain_name(rrset.name), rrset.type_),
)
if start_name:
start_type = start_type or ""
record_sets = itertools.dropwhile(predicate, record_sets)
return record_sets
@property
def physical_resource_id(self):
return self.id
@staticmethod
def cloudformation_name_type():
return "Name"
@staticmethod
def cloudformation_type():
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-route53-hostedzone.html
return "AWS::Route53::HostedZone"
@classmethod
def create_from_cloudformation_json(
cls, resource_name, cloudformation_json, region_name, **kwargs
):
hosted_zone = route53_backend.create_hosted_zone(
resource_name, private_zone=False
)
return hosted_zone
class RecordSetGroup(CloudFormationModel):
def __init__(self, hosted_zone_id, record_sets):
self.hosted_zone_id = hosted_zone_id
self.record_sets = record_sets
@property
def physical_resource_id(self):
return f"arn:aws:route53:::hostedzone/{self.hosted_zone_id}"
@staticmethod
def cloudformation_name_type():
return None
@staticmethod
def cloudformation_type():
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-route53-recordsetgroup.html
return "AWS::Route53::RecordSetGroup"
@classmethod
def create_from_cloudformation_json(
cls, resource_name, cloudformation_json, region_name, **kwargs
):
properties = cloudformation_json["Properties"]
zone_name = properties.get("HostedZoneName")
if zone_name:
hosted_zone = route53_backend.get_hosted_zone_by_name(zone_name)
else:
hosted_zone = route53_backend.get_hosted_zone(properties["HostedZoneId"])
record_sets = properties["RecordSets"]
for record_set in record_sets:
hosted_zone.add_rrset(record_set)
record_set_group = RecordSetGroup(hosted_zone.id, record_sets)
return record_set_group
class QueryLoggingConfig(BaseModel):
"""QueryLoggingConfig class; this object isn't part of Cloudformation."""
def __init__(
self, query_logging_config_id, hosted_zone_id, cloudwatch_logs_log_group_arn
):
self.hosted_zone_id = hosted_zone_id
self.cloudwatch_logs_log_group_arn = cloudwatch_logs_log_group_arn
self.query_logging_config_id = query_logging_config_id
self.location = f"https://route53.amazonaws.com/2013-04-01/queryloggingconfig/{self.query_logging_config_id}"
def to_xml(self):
template = Template(
"""<QueryLoggingConfig>
<CloudWatchLogsLogGroupArn>{{ query_logging_config.cloudwatch_logs_log_group_arn }}</CloudWatchLogsLogGroupArn>
<HostedZoneId>{{ query_logging_config.hosted_zone_id }}</HostedZoneId>
<Id>{{ query_logging_config.query_logging_config_id }}</Id>
</QueryLoggingConfig>"""
)
# The "Location" value must be put into the header; that's done in
# responses.py.
return template.render(query_logging_config=self)
class Route53Backend(BaseBackend):
def __init__(self, region_name, account_id):
super().__init__(region_name, account_id)
self.zones = {}
self.health_checks = {}
self.resource_tags = defaultdict(dict)
self.query_logging_configs = {}
self.delegation_sets = dict()
def create_hosted_zone(
self,
name,
private_zone,
vpcid=None,
vpcregion=None,
comment=None,
delegation_set_id=None,
):
new_id = create_route53_zone_id()
delegation_set = self.create_reusable_delegation_set(
caller_reference=f"DelSet_{name}", delegation_set_id=delegation_set_id
)
# default delegation set does not contains id
if not delegation_set_id:
delegation_set.id = ""
new_zone = FakeZone(
name,
new_id,
private_zone=private_zone,
comment=comment,
delegation_set=delegation_set,
)
# default nameservers are also part of rrset
record_set = {
"Name": name,
"ResourceRecords": delegation_set.name_servers,
"TTL": "172800",
"Type": "NS",
}
new_zone.add_rrset(record_set)
new_zone.add_vpc(vpcid, vpcregion)
self.zones[new_id] = new_zone
return new_zone
def get_dnssec(self, zone_id):
# check if hosted zone exists
self.get_hosted_zone(zone_id)
def associate_vpc(self, zone_id, vpcid, vpcregion):
zone = self.get_hosted_zone(zone_id)
if not zone.private_zone:
raise PublicZoneVPCAssociation()
zone.add_vpc(vpcid, vpcregion)
return zone
def disassociate_vpc(self, zone_id, vpcid):
zone = self.get_hosted_zone(zone_id)
if len(zone.vpcs) <= 1:
raise LastVPCAssociation()
zone.delete_vpc(vpcid)
return zone
def change_tags_for_resource(self, resource_id, tags):
if "Tag" in tags:
if isinstance(tags["Tag"], list):
for tag in tags["Tag"]:
self.resource_tags[resource_id][tag["Key"]] = tag["Value"]
else:
key, value = (tags["Tag"]["Key"], tags["Tag"]["Value"])
self.resource_tags[resource_id][key] = value
else:
if "Key" in tags:
if isinstance(tags["Key"], list):
for key in tags["Key"]:
del self.resource_tags[resource_id][key]
else:
del self.resource_tags[resource_id][tags["Key"]]
def list_tags_for_resource(self, resource_id):
if resource_id in self.resource_tags:
return self.resource_tags[resource_id]
return {}
def list_resource_record_sets(self, zone_id, start_type, start_name, max_items):
"""
The StartRecordIdentifier-parameter is not yet implemented
"""
the_zone = self.get_hosted_zone(zone_id)
all_records = list(the_zone.get_record_sets(start_type, start_name))
records = all_records[0:max_items]
next_record = all_records[max_items] if len(all_records) > max_items else None
next_start_name = next_record.name if next_record else None
next_start_type = next_record.type_ if next_record else None
is_truncated = next_record is not None
return records, next_start_name, next_start_type, is_truncated
def change_resource_record_sets(self, zoneid, change_list):
the_zone = self.get_hosted_zone(zoneid)
for value in change_list:
action = value["Action"]
if action not in ("CREATE", "UPSERT", "DELETE"):
raise InvalidActionValue(action)
record_set = value["ResourceRecordSet"]
cleaned_record_name = record_set["Name"].strip(".")
cleaned_hosted_zone_name = the_zone.name.strip(".")
if not cleaned_record_name.endswith(cleaned_hosted_zone_name):
error_msg = f"""
An error occurred (InvalidChangeBatch) when calling the ChangeResourceRecordSets operation:
RRSet with DNS name {record_set["Name"]} is not permitted in zone {the_zone.name}
"""
return error_msg
if not record_set["Name"].endswith("."):
record_set["Name"] += "."
if action in ("CREATE", "UPSERT"):
if "ResourceRecords" in record_set:
resource_records = list(record_set["ResourceRecords"].values())[0]
if not isinstance(resource_records, list):
# Depending on how many records there are, this may
# or may not be a list
resource_records = [resource_records]
record_set["ResourceRecords"] = [
x["Value"] for x in resource_records
]
if action == "CREATE":
the_zone.add_rrset(record_set)
else:
the_zone.upsert_rrset(record_set)
elif action == "DELETE":
if "SetIdentifier" in record_set:
the_zone.delete_rrset_by_id(record_set["SetIdentifier"])
else:
the_zone.delete_rrset(record_set)
return None
def list_hosted_zones(self):
return self.zones.values()
def list_hosted_zones_by_name(self, dnsname):
if dnsname:
dnsname = dnsname[0]
if dnsname[-1] != ".":
dnsname += "."
zones = [zone for zone in self.list_hosted_zones() if zone.name == dnsname]
else:
# sort by names, but with domain components reversed
# see http://boto3.readthedocs.io/en/latest/reference/services/route53.html#Route53.Client.list_hosted_zones_by_name
def sort_key(zone):
domains = zone.name.split(".")
if domains[-1] == "":
domains = domains[-1:] + domains[:-1]
return ".".join(reversed(domains))
zones = self.list_hosted_zones()
zones = sorted(zones, key=sort_key)
return dnsname, zones
def list_hosted_zones_by_vpc(self, vpc_id):
"""
Pagination is not yet implemented
"""
zone_list = []
for zone in self.list_hosted_zones():
if zone.private_zone is True:
this_zone = self.get_hosted_zone(zone.id)
for vpc in this_zone.vpcs:
if vpc["vpc_id"] == vpc_id:
zone_list.append(
{
"HostedZoneId": zone.id,
"Name": zone.name,
"Owner": {"OwningAccount": get_account_id()},
}
)
return zone_list
def get_hosted_zone(self, id_):
the_zone = self.zones.get(id_.replace("/hostedzone/", ""))
if not the_zone:
raise NoSuchHostedZone(id_)
return the_zone
def get_hosted_zone_count(self):
return len(self.list_hosted_zones())
def get_hosted_zone_by_name(self, name):
for zone in self.list_hosted_zones():
if zone.name == name:
return zone
return None
def delete_hosted_zone(self, id_):
# Verify it exists
zone = self.get_hosted_zone(id_)
if len(zone.rrsets) > 0:
for rrset in zone.rrsets:
if rrset.type_ != "NS" and rrset.type_ != "SOA":
raise HostedZoneNotEmpty()
return self.zones.pop(id_.replace("/hostedzone/", ""), None)
def update_hosted_zone_comment(self, id_, comment):
zone = self.get_hosted_zone(id_)
zone.comment = comment
return zone
def create_health_check(self, caller_reference, health_check_args):
health_check_id = str(uuid.uuid4())
health_check = HealthCheck(health_check_id, caller_reference, health_check_args)
self.health_checks[health_check_id] = health_check
return health_check
def list_health_checks(self):
return self.health_checks.values()
def delete_health_check(self, health_check_id):
return self.health_checks.pop(health_check_id, None)
def get_health_check(self, health_check_id):
health_check = self.health_checks.get(health_check_id)
if not health_check:
raise NoSuchHealthCheck(health_check_id)
return health_check
@staticmethod
def _validate_arn(region, arn):
match = re.match(rf"arn:aws:logs:{region}:\d{{12}}:log-group:.+", arn)
if not arn or not match:
raise InvalidCloudWatchArn()
# The CloudWatch Logs log group must be in the "us-east-1" region.
match = re.match(r"^(?:[^:]+:){3}(?P<region>[^:]+).*", arn)
if match.group("region") != "us-east-1":
raise InvalidCloudWatchArn()
def create_query_logging_config(self, region, hosted_zone_id, log_group_arn):
"""Process the create_query_logging_config request."""
# Does the hosted_zone_id exist?
response = self.list_hosted_zones()
zones = list(response) if response else []
for zone in zones:
if zone.id == hosted_zone_id:
break
else:
raise NoSuchHostedZone(hosted_zone_id)
# Ensure CloudWatch Logs log ARN is valid, otherwise raise an error.
self._validate_arn(region, log_group_arn)
# Note: boto3 checks the resource policy permissions before checking
# whether the log group exists. moto doesn't have a way of checking
# the resource policy, so in some instances moto will complain
# about a log group that doesn't exist whereas boto3 will complain
# that "The resource policy that you're using for Route 53 query
# logging doesn't grant Route 53 sufficient permission to create
# a log stream in the specified log group."
from moto.logs import logs_backends # pylint: disable=import-outside-toplevel
response = logs_backends[region].describe_log_groups()
log_groups = response[0] if response else []
for entry in log_groups:
if log_group_arn == entry["arn"]:
break
else:
# There is no CloudWatch Logs log group with the specified ARN.
raise NoSuchCloudWatchLogsLogGroup()
# Verify there is no existing query log config using the same hosted
# zone.
for query_log in self.query_logging_configs.values():
if query_log.hosted_zone_id == hosted_zone_id:
raise QueryLoggingConfigAlreadyExists()
# Create an instance of the query logging config.
query_logging_config_id = str(uuid.uuid4())
query_logging_config = QueryLoggingConfig(
query_logging_config_id, hosted_zone_id, log_group_arn
)
self.query_logging_configs[query_logging_config_id] = query_logging_config
return query_logging_config
def delete_query_logging_config(self, query_logging_config_id):
"""Delete query logging config, if it exists."""
if query_logging_config_id not in self.query_logging_configs:
raise NoSuchQueryLoggingConfig()
self.query_logging_configs.pop(query_logging_config_id)
def get_query_logging_config(self, query_logging_config_id):
"""Return query logging config, if it exists."""
if query_logging_config_id not in self.query_logging_configs:
raise NoSuchQueryLoggingConfig()
return self.query_logging_configs[query_logging_config_id]
@paginate(pagination_model=PAGINATION_MODEL)
def list_query_logging_configs(self, hosted_zone_id=None):
"""Return a list of query logging configs."""
if hosted_zone_id:
# Does the hosted_zone_id exist?
response = self.list_hosted_zones()
zones = list(response) if response else []
for zone in zones:
if zone.id == hosted_zone_id:
break
else:
raise NoSuchHostedZone(hosted_zone_id)
return list(self.query_logging_configs.values())
def create_reusable_delegation_set(
self, caller_reference, delegation_set_id=None, hosted_zone_id=None
):
name_servers = None
if hosted_zone_id:
hosted_zone = self.get_hosted_zone(hosted_zone_id)
name_servers = hosted_zone.delegation_set.name_servers
delegation_set = DelegationSet(
caller_reference, name_servers, delegation_set_id
)
self.delegation_sets[delegation_set.id] = delegation_set
return delegation_set
def list_reusable_delegation_sets(self):
"""
Pagination is not yet implemented
"""
return self.delegation_sets.values()
def delete_reusable_delegation_set(self, delegation_set_id):
self.delegation_sets.pop(delegation_set_id, None)
def get_reusable_delegation_set(self, delegation_set_id):
if delegation_set_id not in self.delegation_sets:
raise NoSuchDelegationSet(delegation_set_id)
return self.delegation_sets[delegation_set_id]
route53_backends = BackendDict(
Route53Backend, "route53", use_boto3_regions=False, additional_regions=["global"]
)
route53_backend = route53_backends["global"]