Merge pull request #1335 from castrapel/dyn_dns_fix

Dyn dns fix
This commit is contained in:
Curtis 2018-06-13 14:35:42 -07:00 committed by GitHub
commit e8c18bd9b6
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6 changed files with 110 additions and 59 deletions

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@ -5,11 +5,10 @@ import dns.exception
import dns.name
import dns.query
import dns.resolver
from dyn.tm.errors import DynectCreateError
from dyn.tm.errors import DynectGetError
from dyn.tm.session import DynectSession
from dyn.tm.zones import Node, Zone
from dyn.tm.zones import Node, Zone, get_all_zones
from flask import current_app
from tld import get_tld
def get_dynect_session():
@ -51,19 +50,43 @@ def wait_for_dns_change(change_id, account_number=None):
return
def get_zone_name(domain):
zones = get_all_zones()
zone_name = ""
for z in zones:
if domain.endswith(z.name):
# Find the most specific zone possible for the domain
# Ex: If fqdn is a.b.c.com, there is a zone for c.com,
# and a zone for b.c.com, we want to use b.c.com.
if z.name.count(".") > zone_name.count("."):
zone_name = z.name
if not zone_name:
raise Exception("No Dyn zone found for domain: {}".format(domain))
return zone_name
def create_txt_record(domain, token, account_number):
get_dynect_session()
zone_name = get_tld('http://' + domain)
zone_name = get_zone_name(domain)
zone_parts = len(zone_name.split('.'))
node_name = '.'.join(domain.split('.')[:-zone_parts])
fqdn = "{0}.{1}".format(node_name, zone_name)
zone = Zone(zone_name)
try:
zone.add_record(node_name, record_type='TXT', txtdata="\"{}\"".format(token), ttl=5)
except DynectCreateError:
delete_txt_record(None, None, domain, token)
zone.add_record(node_name, record_type='TXT', txtdata="\"{}\"".format(token), ttl=5)
node = zone.get_node(node_name)
# Delete all stale ACME TXT records
delete_acme_txt_records(domain)
except DynectGetError as e:
if (
"No such zone." in e.message or
"Host is not in this zone" in e.message or
"Host not found in this zone" in e.message
):
current_app.logger.debug("Unable to delete ACME TXT records. They probably don't exist yet: {}".format(e))
else:
raise
zone.add_record(node_name, record_type='TXT', txtdata="\"{}\"".format(token), ttl=5)
zone.publish()
current_app.logger.debug("TXT record created: {0}".format(fqdn))
change_id = (fqdn, token)
@ -76,7 +99,7 @@ def delete_txt_record(change_id, account_number, domain, token):
current_app.logger.debug("delete_txt_record: No domain passed")
return
zone_name = get_tld('http://' + domain)
zone_name = get_zone_name(domain)
zone_parts = len(zone_name.split('.'))
node_name = '.'.join(domain.split('.')[:-zone_parts])
fqdn = "{0}.{1}".format(node_name, zone_name)
@ -92,40 +115,70 @@ def delete_txt_record(change_id, account_number, domain, token):
zone.publish()
def delete_acme_txt_records(domain):
get_dynect_session()
if not domain:
current_app.logger.debug("delete_acme_txt_records: No domain passed")
return
acme_challenge_string = "_acme-challenge"
if not domain.startswith(acme_challenge_string):
current_app.logger.debug(
"delete_acme_txt_records: Domain {} doesn't start with string {}. "
"Cowardly refusing to delete TXT records".format(domain, acme_challenge_string))
return
zone_name = get_zone_name(domain)
zone_parts = len(zone_name.split('.'))
node_name = '.'.join(domain.split('.')[:-zone_parts])
fqdn = "{0}.{1}".format(node_name, zone_name)
zone = Zone(zone_name)
node = Node(zone_name, fqdn)
all_txt_records = node.get_all_records_by_type('TXT')
for txt_record in all_txt_records:
current_app.logger.debug("Deleting TXT record name: {0}".format(fqdn))
txt_record.delete()
zone.publish()
def get_authoritative_nameserver(domain):
n = dns.name.from_text(domain)
if current_app.config.get('ACME_DYN_GET_AUTHORATATIVE_NAMESERVER'):
n = dns.name.from_text(domain)
depth = 2
default = dns.resolver.get_default_resolver()
nameserver = default.nameservers[0]
depth = 2
default = dns.resolver.get_default_resolver()
nameserver = default.nameservers[0]
last = False
while not last:
s = n.split(depth)
last = False
while not last:
s = n.split(depth)
last = s[0].to_unicode() == u'@'
sub = s[1]
last = s[0].to_unicode() == u'@'
sub = s[1]
query = dns.message.make_query(sub, dns.rdatatype.NS)
response = dns.query.udp(query, nameserver)
query = dns.message.make_query(sub, dns.rdatatype.NS)
response = dns.query.udp(query, nameserver)
rcode = response.rcode()
if rcode != dns.rcode.NOERROR:
if rcode == dns.rcode.NXDOMAIN:
raise Exception('%s does not exist.' % sub)
rcode = response.rcode()
if rcode != dns.rcode.NOERROR:
if rcode == dns.rcode.NXDOMAIN:
raise Exception('%s does not exist.' % sub)
else:
raise Exception('Error %s' % dns.rcode.to_text(rcode))
if len(response.authority) > 0:
rrset = response.authority[0]
else:
raise Exception('Error %s' % dns.rcode.to_text(rcode))
rrset = response.answer[0]
if len(response.authority) > 0:
rrset = response.authority[0]
else:
rrset = response.answer[0]
rr = rrset[0]
if rr.rdtype != dns.rdatatype.SOA:
authority = rr.target
nameserver = default.query(authority).rrset[0].to_text()
rr = rrset[0]
if rr.rdtype != dns.rdatatype.SOA:
authority = rr.target
nameserver = default.query(authority).rrset[0].to_text()
depth += 1
depth += 1
return nameserver
return nameserver
else:
return "8.8.8.8"

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@ -11,20 +11,20 @@ cfgv==1.1.0 # via pre-commit
chardet==3.0.4 # via requests
flake8==3.5.0
identify==1.1.0 # via pre-commit
idna==2.6 # via requests
idna==2.7 # via requests
invoke==1.0.0
mccabe==0.6.1 # via flake8
nodeenv==1.3.0
nodeenv==1.3.1
pkginfo==1.4.2 # via twine
pre-commit==1.10.2
pycodestyle==2.3.1 # via flake8
pyflakes==1.6.0 # via flake8
pyyaml==3.12 # via aspy.yaml, pre-commit
requests-toolbelt==0.8.0 # via twine
requests==2.18.4 # via requests-toolbelt, twine
requests==2.19.0 # via requests-toolbelt, twine
six==1.11.0 # via cfgv, pre-commit
toml==0.9.4 # via pre-commit
tqdm==4.23.4 # via twine
twine==1.11.0
urllib3==1.22 # via requests
urllib3==1.23 # via requests
virtualenv==16.0.0 # via pre-commit

View File

@ -4,7 +4,7 @@
#
# pip-compile --no-index --output-file requirements-docs.txt requirements-docs.in
#
acme==0.24.0
acme==0.25.1
alabaster==0.7.10 # via sphinx
alembic-autogenerate-enums==0.0.2
alembic==0.9.9
@ -15,8 +15,8 @@ asyncpool==1.0
babel==2.6.0 # via sphinx
bcrypt==3.1.4
blinker==1.4
boto3==1.7.32
botocore==1.10.32
boto3==1.7.37
botocore==1.10.37
certifi==2018.4.16
cffi==1.11.5
click==6.7
@ -27,7 +27,7 @@ dnspython==1.15.0
docutils==0.14
dyn==1.8.1
flask-bcrypt==0.7.1
flask-cors==3.0.4
flask-cors==3.0.6
flask-mail==0.9.1
flask-migrate==2.1.1
flask-principal==0.4.0
@ -37,7 +37,7 @@ flask-sqlalchemy==2.3.2
flask==0.12
future==0.16.0
gunicorn==19.8.1
idna==2.6
idna==2.7
imagesize==1.0.0 # via sphinx
inflection==0.3.1
itsdangerous==0.24
@ -54,7 +54,7 @@ mock==2.0.0
ndg-httpsclient==0.5.0
packaging==17.1 # via sphinx
paramiko==2.4.1
pbr==4.0.3
pbr==4.0.4
pem==17.1.0
psycopg2==2.7.4
pyasn1-modules==0.2.1
@ -65,12 +65,13 @@ pyjwt==1.6.4
pynacl==1.2.1
pyopenssl==17.2.0
pyparsing==2.2.0 # via packaging
pyrfc3339==1.0
pyrfc3339==1.1
python-dateutil==2.7.3
python-editor==1.0.3
pytz==2018.4
pyyaml==3.12
raven[flask]==6.9.0
requests-toolbelt==0.8.0
requests[security]==2.11.1
retrying==1.3.3
s3transfer==0.1.13
@ -83,6 +84,5 @@ sphinxcontrib-websupport==1.1.0 # via sphinx
sqlalchemy-utils==0.33.3
sqlalchemy==1.2.8
tabulate==0.8.2
tld==0.7.10
werkzeug==0.14.1
xmltodict==0.11.0

View File

@ -8,9 +8,9 @@ asn1crypto==0.24.0 # via cryptography
atomicwrites==1.1.5 # via pytest
attrs==18.1.0 # via pytest
aws-xray-sdk==0.95 # via moto
boto3==1.7.36 # via moto
boto3==1.7.37 # via moto
boto==2.48.0 # via moto
botocore==1.10.36 # via boto3, moto, s3transfer
botocore==1.10.37 # via boto3, moto, s3transfer
certifi==2018.4.16 # via requests
cffi==1.11.5 # via cryptography
chardet==3.0.4 # via requests
@ -25,7 +25,7 @@ factory-boy==2.11.1
faker==0.8.15
flask==1.0.2 # via pytest-flask
freezegun==0.3.10
idna==2.6 # via cryptography, requests
idna==2.7 # via cryptography, requests
itsdangerous==0.24 # via flask
jinja2==2.10 # via flask, moto
jmespath==0.9.3 # via boto3, botocore
@ -49,12 +49,12 @@ python-dateutil==2.6.1 # via botocore, faker, freezegun, moto
pytz==2018.4 # via moto
pyyaml==3.12 # via pyaml
requests-mock==1.5.0
requests==2.18.4 # via aws-xray-sdk, docker, moto, requests-mock, responses
requests==2.19.0 # via aws-xray-sdk, docker, moto, requests-mock, responses
responses==0.9.0 # via moto
s3transfer==0.1.13 # via boto3
six==1.11.0 # via cryptography, docker, docker-pycreds, faker, freezegun, mock, more-itertools, moto, pytest, python-dateutil, requests-mock, responses, websocket-client
text-unidecode==1.2 # via faker
urllib3==1.22 # via requests
urllib3==1.23 # via requests
websocket-client==0.48.0 # via docker
werkzeug==0.14.1 # via flask, moto, pytest-flask
wrapt==1.10.11 # via aws-xray-sdk

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@ -39,5 +39,4 @@ retrying
six
SQLAlchemy-Utils
tabulate
tld
xmltodict

View File

@ -4,7 +4,7 @@
#
# pip-compile --no-index --output-file requirements.txt requirements.in
#
acme==0.25.0
acme==0.25.1
alembic-autogenerate-enums==0.0.2
alembic==0.9.9 # via flask-migrate
aniso8601==3.0.0 # via flask-restful
@ -13,8 +13,8 @@ asn1crypto==0.24.0 # via cryptography
asyncpool==1.0
bcrypt==3.1.4 # via flask-bcrypt, paramiko
blinker==1.4 # via flask-mail, flask-principal, raven
boto3==1.7.36
botocore==1.10.36 # via boto3, s3transfer
boto3==1.7.37
botocore==1.10.37 # via boto3, s3transfer
certifi==2018.4.16
cffi==1.11.5 # via bcrypt, cryptography, pynacl
click==6.7 # via flask
@ -74,6 +74,5 @@ six==1.11.0
sqlalchemy-utils==0.33.3
sqlalchemy==1.2.8 # via alembic, flask-sqlalchemy, marshmallow-sqlalchemy, sqlalchemy-utils
tabulate==0.8.2
tld==0.7.10
werkzeug==0.14.1 # via flask
xmltodict==0.11.0