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refactor dns_update so that the zone is first generated in a file-format agnostic way

This commit is contained in:
Joshua Tauberer 2014-06-04 19:00:31 -04:00
parent 8ed15168c0
commit 7fa4862f1a
1 changed files with 40 additions and 32 deletions
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72
management/dns_update.py
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@ -25,7 +25,8 @@ def do_dns_update(env):
os.makedirs('/etc/nsd/zones', exist_ok=True)
updated_domains = []
for domain, zonefile in zonefiles:
if write_nsd_zone(domain, "/etc/nsd/zones/" + zonefile, env):
records = build_zone(domain, env)
if write_nsd_zone(domain, "/etc/nsd/zones/" + zonefile, records, env):
updated_domains.append(domain)
# Write the main nsd.conf file.
@ -45,7 +46,37 @@ def do_dns_update(env):
########################################################################
def write_nsd_zone(domain, zonefile, env):
def build_zone(domain, env):
records = []
records.append((None, "NS", "ns1.%s." % env["PUBLIC_HOSTNAME"]))
records.append((None, "NS", "ns2.%s." % env["PUBLIC_HOSTNAME"]))
records.append((None, "A", env["PUBLIC_IP"]))
records.append((None, "MX", "10 %s." % env["PUBLIC_HOSTNAME"]))
records.append((None, "TXT", '"v=spf1 mx -all"'))
records.append(("www", "A", env["PUBLIC_IP"]))
# In PUBLIC_HOSTNAME, also define ns1 and ns2.
if domain == env["PUBLIC_HOSTNAME"]:
records.append(("ns1", "A", env["PUBLIC_IP"]))
records.append(("ns2", "A", env["PUBLIC_IP"]))
# If OpenDKIM is in use..
opendkim_record_file = os.path.join(env['STORAGE_ROOT'], 'mail/dkim/mail.txt')
if os.path.exists(opendkim_record_file):
# Append the DKIM TXT record to the zone as generated by OpenDKIM, after string formatting above.
with open(opendkim_record_file) as orf:
m = re.match(r"(\S+)\s+IN\s+TXT\s+(\(.*\))\s*;", orf.read(), re.S)
records.append((m.group(1), "TXT", m.group(2)))
# Append ADSP (RFC 5617) and DMARC records.
records.append(("_adsp._domainkey", "TXT", '"dkim=all"'))
records.append(("_dmarc", "TXT", '"v=DMARC1; p=quarantine"'))
return records
########################################################################
def write_nsd_zone(domain, zonefile, records, env):
# We set the administrative email address for every domain to domain_contact@[domain.com].
# You should probably create an alias to your email address.
@ -60,39 +91,17 @@ $TTL 86400 ; default time to live
864000 ; Expire
86400 ; Min TTL
)
NS ns1.{primary_domain}.
NS ns2.{primary_domain}.
IN A {ip}
MX 10 {primary_domain}.
300 TXT "v=spf1 mx -all"
www IN A {ip}
"""
# In PUBLIC_HOSTNAME, also define ns1 and ns2.
if domain == env["PUBLIC_HOSTNAME"]:
zone += """
ns1 IN A {ip}
ns2 IN A {ip}
"""
# Replace replacement strings.
zone = zone.format(domain=domain, primary_domain=env["PUBLIC_HOSTNAME"], ip=env["PUBLIC_IP"])
zone = zone.format(domain=domain, primary_domain=env["PUBLIC_HOSTNAME"])
# If OpenDKIM is in use..
opendkim_record_file = os.path.join(env['STORAGE_ROOT'], 'mail/dkim/mail.txt')
if os.path.exists(opendkim_record_file):
# Append the DKIM TXT record to the zone as generated by OpenDKIM, after string formatting above.
with open(opendkim_record_file) as orf:
zone += orf.read()
# Append ADSP (RFC 5617) and DMARC records.
zone += """
_adsp._domainkey IN TXT "dkim=all"
_dmarc IN TXT "v=DMARC1; p=quarantine"
"""
# Add records.
for subdomain, querytype, value in records:
if subdomain:
zone += subdomain
zone += "\tIN\t" + querytype + "\t"
zone += value + "\n"
# Set the serial number.
serial = time.strftime("%Y%m%d00")
@ -177,4 +186,3 @@ def write_opendkim_tables(zonefiles, env):
for domain, zonefile in zonefiles
))