django-orchestra/orchestra/apps/domains/backends.py

150 lines
5.3 KiB
Python

import re
import textwrap
from django.utils.translation import ugettext_lazy as _
from orchestra.apps.orchestration import ServiceController
from orchestra.utils.python import AttrDict
from . import settings
class Bind9MasterDomainBackend(ServiceController):
verbose_name = _("Bind9 master domain")
model = 'domains.Domain'
related_models = (
('domains.Record', 'domain__origin'),
('domains.Domain', 'origin'),
)
ignore_fields = ['serial']
@classmethod
def is_main(cls, obj):
""" work around Domain.top self relationship """
if super(Bind9MasterDomainBackend, cls).is_main(obj):
return not obj.top
def save(self, domain):
context = self.get_context(domain)
domain.refresh_serial()
context['zone'] = ';; %(banner)s\n' % context
context['zone'] += domain.render_zone()
self.append(textwrap.dedent("""\
echo -e '%(zone)s' > %(zone_path)s.tmp
diff -N -I'^\s*;;' %(zone_path)s %(zone_path)s.tmp || UPDATED=1
mv %(zone_path)s.tmp %(zone_path)s""" % context
))
self.update_conf(context)
def update_conf(self, context):
self.append(textwrap.dedent("""\
sed '/zone "%(name)s".*/,/^\s*};\s*$/!d' %(conf_path)s | diff -B -I"^\s*//" - <(echo '%(conf)s') || {
sed -i -e '/zone\s\s*"%(name)s".*/,/^\s*};/d' \\
-e 'N; /^\\n$/d; P; D' %(conf_path)s
echo '%(conf)s' >> %(conf_path)s
UPDATED=1
}""" % context
))
# Delete ex-top-domains that are now subdomains
self.append(textwrap.dedent("""\
sed -i -e '/zone\s\s*".*\.%(name)s".*/,/^\s*};\s*$/d' \\
-e 'N; /^\\n$/d; P; D' %(conf_path)s""" % context
))
if 'zone_path' in context:
context['zone_subdomains_path'] = re.sub(r'^(.*/)', r'\1*.', context['zone_path'])
self.append('rm -f %(zone_subdomains_path)s' % context)
def delete(self, domain):
context = self.get_context(domain)
self.append('rm -f %(zone_path)s;' % context)
self.delete_conf(context)
def delete_conf(self, context):
if context['name'][0] in ('*', '_'):
# These can never be top level domains
return
self.append(textwrap.dedent("""\
sed -e '/zone\s\s*"%(name)s".*/,/^\s*};\s*$/d' \\
-e 'N; /^\\n$/d; P; D' %(conf_path)s > %(conf_path)s.tmp""" % context
))
self.append('diff -B -I"^\s*//" %(conf_path)s.tmp %(conf_path)s || UPDATED=1' % context)
self.append('mv %(conf_path)s.tmp %(conf_path)s' % context)
def commit(self):
""" reload bind if needed """
self.append('[[ $UPDATED == 1 ]] && service bind9 reload')
def get_servers(self, domain, backend):
from orchestra.apps.orchestration.models import Route
operation = AttrDict(backend=backend, action='save', instance=domain)
servers = []
for server in Route.get_servers(operation):
servers.append(server.get_ip())
return servers
def get_slaves(self, domain):
return self.get_servers(domain, Bind9SlaveDomainBackend)
def get_context(self, domain):
context = {
'name': domain.name,
'zone_path': settings.DOMAINS_ZONE_PATH % {'name': domain.name},
'subdomains': domain.subdomains.all(),
'banner': self.get_banner(),
'slaves': '; '.join(self.get_slaves(domain)) or '',
}
context.update({
'conf_path': settings.DOMAINS_MASTERS_PATH,
'conf': textwrap.dedent("""
zone "%(name)s" {
// %(banner)s
type master;
file "%(zone_path)s";
allow-transfer { %(slaves)s; };
also-notify { %(slaves)s; };
};""" % context)
})
return context
class Bind9SlaveDomainBackend(Bind9MasterDomainBackend):
verbose_name = _("Bind9 slave domain")
related_models = (
('domains.Domain', 'origin'),
)
def save(self, domain):
context = self.get_context(domain)
self.update_conf(context)
def delete(self, domain):
context = self.get_context(domain)
self.delete_conf(context)
def commit(self):
""" ideally slave should be restarted after master """
self.append('[[ $UPDATED == 1 ]] && { sleep 1 && service bind9 reload; } &')
def get_masters(self, domain):
return self.get_servers(domain, Bind9MasterDomainBackend)
def get_context(self, domain):
context = {
'name': domain.name,
'banner': self.get_banner(),
'subdomains': domain.subdomains.all(),
'masters': '; '.join(self.get_masters(domain)) or '',
}
context.update({
'conf_path': settings.DOMAINS_SLAVES_PATH,
'conf': textwrap.dedent("""
zone "%(name)s" {
// %(banner)s
type slave;
file "%(name)s";
masters { %(masters)s; };
allow-notify { %(masters)s; };
};""" % context)
})
return context