def create_route53_zone(client, zone_name):
"""Create the given zone_name if it doesn't already exists.
Also sets the SOA negative caching TTL to something short (300 seconds).
Args:
client (:class:`boto3.client.Client`): The connection used to
interact with Route53's API.
zone_name (str): The name of the DNS hosted zone to create.
Returns:
str: The zone id returned from AWS for the existing, or newly
created zone.
"""
if not zone_name.endswith("."):
zone_name += "."
zone_id = get_or_create_hosted_zone(client, zone_name)
old_soa = get_soa_record(client, zone_id, zone_name)
# If the negative cache value is already 300, don't update it.
if old_soa.text.min_ttl == "300":
return zone_id
new_soa = copy.deepcopy(old_soa)
LOGGER.debug("Updating negative caching value on zone %s to 300.",
zone_name)
new_soa.text.min_ttl = "300"
client.change_resource_record_sets(HostedZoneId=zone_id,
ChangeBatch={
"Comment":
"Update SOA min_ttl to 300.",
"Changes": [
{
"Action": "UPSERT",
"ResourceRecordSet": {
"Name":
zone_name,
"Type":
"SOA",
"TTL":
old_soa.ttl,
"ResourceRecords": [{
"Value":
str(new_soa.text)
}]
}
},
]
})
return zone_id
def create_route53_zone(client, zone_name):
"""Creates the given zone_name if it doesn't already exists.
Also sets the SOA negative caching TTL to something short (300 seconds).
Args:
client (:class:`botocore.client.Route53`): The connection used to
interact with Route53's API.
zone_name (string): The name of the DNS hosted zone to create.
Returns:
string: The zone id returned from AWS for the existing, or newly
created zone.
"""
if not zone_name.endswith("."):
zone_name += "."
zone_id = get_or_create_hosted_zone(client, zone_name)
old_soa = get_soa_record(client, zone_id, zone_name)
# If the negative cache value is already 300, don't update it.
if old_soa.text.min_ttl == "300":
return zone_id
new_soa = copy.deepcopy(old_soa)
logger.debug("Updating negative caching value on zone %s to 300.",
zone_name)
new_soa.text.min_ttl = "300"
client.change_resource_record_sets(
HostedZoneId=zone_id,
ChangeBatch={
"Comment": "Update SOA min_ttl to 300.",
"Changes": [
{
"Action": "UPSERT",
"ResourceRecordSet": {
"Name": zone_name,
"Type": "SOA",
"TTL": old_soa.ttl,
"ResourceRecords": [
{
"Value": str(new_soa.text)
}
]
}
},
]
}
)
return zone_id
def register_zone_records(
session: boto3.Session,
zone_id: str,
domain_name: str,
load_balancer_arn: str,
acm_valid_name: str,
acm_valid_target: str,
) -> int:
"""
Creates the required zone records for this mephisto hosted zone. Requires
the load balancer target, and the ACM certificate addresses
Returns the change id
"""
# Get details about the load balancer
ec2_client = session.client("elbv2")
balancer = ec2_client.describe_load_balancers(
LoadBalancerArns=[load_balancer_arn], )["LoadBalancers"][0]
load_balancer_dns = balancer["DNSName"]
load_balancer_zone = balancer["CanonicalHostedZoneId"]
# Create the records
client = session.client("route53")
response = client.change_resource_record_sets(
HostedZoneId=zone_id,
ChangeBatch={
"Comment":
"Creating records for Mephisto load balancer and DNS validations for certs",
"Changes": [
{
"Action": "CREATE",
"ResourceRecordSet": {
"Name": f"*.{domain_name}",
"Type": "A",
"AliasTarget": {
"HostedZoneId": load_balancer_zone,
"DNSName": load_balancer_dns,
"EvaluateTargetHealth": True,
},
},
},
{
"Action": "CREATE",
"ResourceRecordSet": {
"Name": f"{domain_name}",
"Type": "A",
"AliasTarget": {
"HostedZoneId": load_balancer_zone,
"DNSName": load_balancer_dns,
"EvaluateTargetHealth": True,
},
},
},
{
"Action": "CREATE",
"ResourceRecordSet": {
"Name": acm_valid_name,
"Type": "CNAME",
"TTL": 300,
"ResourceRecords": [
{
"Value": acm_valid_target
},
],
},
},
],
},
)
return response["ChangeInfo"]["Id"]
