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'), ) @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("{ echo -e '%(zone)s' | diff -N -I'^;;' %(zone_path)s - ; } ||" " { echo -e '%(zone)s' > %(zone_path)s; UPDATED=1; }" % context) self.update_conf(context) def update_conf(self, context): self.append("grep '\s*zone\s*\"%(name)s\"\s*{' %(conf_path)s > /dev/null ||" " { echo -e '%(conf)s' >> %(conf_path)s; UPDATED=1; }" % context) for subdomain in context['subdomains']: context['name'] = subdomain.name self.delete(subdomain) 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): self.append(textwrap.dedent(""" awk -v s=%(name)s 'BEGIN { RS=""; s="zone \\""s"\\"" } $0!~s{ print $0"\\n" }' %(conf_path)s > %(conf_path)s.tmp""" % context )) self.append('diff -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 'none', } 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; }; };""" % 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 'none', } 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