Add DNS models
This commit add model classes closely matching the tables defined in PowerDNS' schema as described at https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/. The commit includes the model definitions a schema migration including PostgreSQL specific CHECK constraints and the registration in the Django admin interface. addresses #17
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3 changed files with 408 additions and 2 deletions
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@ -10,6 +10,14 @@ from django.utils.encoding import python_2_unicode_compatible
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from django.utils.translation import ugettext as _
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from model_utils.models import TimeStampedModel
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from model_utils import Choices
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DNS_DOMAIN_TYPES = Choices(
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('MASTER', _('Master')),
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('SLAVE', _('Slave')),
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('NATIVE', _('Native')),
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)
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@python_2_unicode_compatible
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@ -18,7 +26,7 @@ class DomainBase(TimeStampedModel):
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This is the base model for domains.
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"""
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domain = models.CharField(_('domain name'), max_length=128, unique=True)
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domain = models.CharField(_('domain name'), max_length=255, unique=True)
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customer = models.ForeignKey(
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settings.AUTH_USER_MODEL, verbose_name=_('customer'), blank=True,
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null=True)
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@ -96,3 +104,228 @@ class HostingDomain(DomainBase):
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def __str__(self):
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return self.domain
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@python_2_unicode_compatible
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class DNSDomain(DomainBase):
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"""
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This model represents a DNS zone. The model is similar to the domain table
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in the PowerDNS schema specified in
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https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/.
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CREATE TABLE domains (
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id SERIAL PRIMARY KEY,
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name VARCHAR(255) NOT NULL,
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master VARCHAR(128) DEFAULT NULL,
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last_check INT DEFAULT NULL,
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type VARCHAR(6) NOT NULL,
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notified_serial INT DEFAULT NULL,
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account VARCHAR(40) DEFAULT NULL,
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CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
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);
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CREATE UNIQUE INDEX name_index ON domains(name);
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"""
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# name is represented by domain
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master = models.CharField(max_length=128, blank=True, null=True)
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last_check = models.IntegerField(null=True)
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domaintype = models.CharField(max_length=6, choices=DNS_DOMAIN_TYPES,
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db_column='type')
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notified_serial = models.IntegerField(null=True)
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# account is represented by customer_id
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# check constraint is added via RunSQL in migration
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class Meta:
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verbose_name = _('DNS domain')
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verbose_name_plural = _('DNS domains')
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def __str__(self):
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return self.domain
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class DNSRecord(models.Model):
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"""
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This model represents a DNS record. The model is similar to the record
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table in the PowerDNS schema specified in
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https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/.
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CREATE TABLE records (
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id SERIAL PRIMARY KEY,
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domain_id INT DEFAULT NULL,
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name VARCHAR(255) DEFAULT NULL,
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type VARCHAR(10) DEFAULT NULL,
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content VARCHAR(65535) DEFAULT NULL,
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ttl INT DEFAULT NULL,
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prio INT DEFAULT NULL,
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change_date INT DEFAULT NULL,
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disabled BOOL DEFAULT 'f',
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ordername VARCHAR(255),
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auth BOOL DEFAULT 't',
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CONSTRAINT domain_exists
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FOREIGN KEY(domain_id) REFERENCES domains(id)
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ON DELETE CASCADE,
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CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
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);
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CREATE INDEX rec_name_index ON records(name);
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CREATE INDEX nametype_index ON records(name,type);
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CREATE INDEX domain_id ON records(domain_id);
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CREATE INDEX recordorder ON records (domain_id, ordername text_pattern_ops);
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"""
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domain = models.ForeignKey('DNSDomain')
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name = models.CharField(max_length=255, blank=True, null=True,
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db_index=True)
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recordtype = models.CharField(max_length=10, blank=True, null=True,
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db_column='type')
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content = models.CharField(max_length=65535, blank=True, null=True)
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ttl = models.IntegerField(null=True)
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prio = models.IntegerField(null=True)
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change_date = models.IntegerField(null=True)
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disabled = models.BooleanField(default=False)
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ordername = models.CharField(max_length=255)
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auth = models.BooleanField(default=True)
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# check constraint and index recordorder are added via RunSQL in migration
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class Meta:
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verbose_name = _('DNS record')
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verbose_name_plural = _('DNS records')
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index_together = [
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['name', 'recordtype']
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]
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class DNSSupermaster(models.Model):
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"""
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This model represents the supermasters table in the PowerDNS schema
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specified in
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https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/.
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CREATE TABLE supermasters (
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ip INET NOT NULL,
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nameserver VARCHAR(255) NOT NULL,
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account VARCHAR(40) NOT NULL,
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PRIMARY KEY(ip, nameserver)
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);
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"""
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ip = models.GenericIPAddressField()
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nameserver = models.CharField(max_length=255)
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# account is replaced by customer
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customer = models.ForeignKey(
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settings.AUTH_USER_MODEL, verbose_name=_('customer'))
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class Meta:
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unique_together = (
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('ip', 'nameserver')
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)
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class DNSComment(models.Model):
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"""
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This model represents the comments table in the PowerDNS schema specified
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in https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/.
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CREATE TABLE comments (
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id SERIAL PRIMARY KEY,
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domain_id INT NOT NULL,
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name VARCHAR(255) NOT NULL,
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type VARCHAR(10) NOT NULL,
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modified_at INT NOT NULL,
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account VARCHAR(40) DEFAULT NULL,
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comment VARCHAR(65535) NOT NULL,
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CONSTRAINT domain_exists
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FOREIGN KEY(domain_id) REFERENCES domains(id)
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ON DELETE CASCADE,
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CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
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);
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CREATE INDEX comments_domain_id_idx ON comments (domain_id);
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CREATE INDEX comments_name_type_idx ON comments (name, type);
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CREATE INDEX comments_order_idx ON comments (domain_id, modified_at);
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"""
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domain = models.ForeignKey('DNSDomain')
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name = models.CharField(max_length=255)
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commenttype = models.CharField(max_length=10, db_column='type')
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modified_at = models.IntegerField()
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# account is replaced by customer
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customer = models.ForeignKey(
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settings.AUTH_USER_MODEL, verbose_name=_('customer'))
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comment = models.CharField(max_length=65535)
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# check constraint is added via RunSQL in migration
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class Meta:
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index_together = [
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['name', 'commenttype'],
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['domain', 'modified_at']
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]
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class DNSDomainMetadata(models.Model):
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"""
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This model represents the domainmetadata table in the PowerDNS schema
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specified in
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https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/.
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CREATE TABLE domainmetadata (
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id SERIAL PRIMARY KEY,
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domain_id INT REFERENCES domains(id) ON DELETE CASCADE,
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kind VARCHAR(32),
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content TEXT
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);
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CREATE INDEX domainidmetaindex ON domainmetadata(domain_id);
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"""
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domain = models.ForeignKey('DNSDomain')
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kind = models.CharField(max_length=32)
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content = models.TextField()
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class DNSCryptoKey(models.Model):
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"""
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This model represents the cryptokeys table in the PowerDNS schema
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specified in
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https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/.
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CREATE TABLE cryptokeys (
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id SERIAL PRIMARY KEY,
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domain_id INT REFERENCES domains(id) ON DELETE CASCADE,
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flags INT NOT NULL,
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active BOOL,
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content TEXT
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);
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CREATE INDEX domainidindex ON cryptokeys(domain_id);
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"""
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domain = models.ForeignKey('DNSDomain')
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flags = models.IntegerField()
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active = models.BooleanField(default=True)
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content = models.TextField()
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class DNSTSIGKey(models.Model):
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"""
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This model represents the tsigkeys table in the PowerDNS schema specified
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in https://doc.powerdns.com/md/authoritative/backend-generic-mypgsql/.
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CREATE TABLE tsigkeys (
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id SERIAL PRIMARY KEY,
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name VARCHAR(255),
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algorithm VARCHAR(50),
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secret VARCHAR(255),
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CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
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);
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CREATE UNIQUE INDEX namealgoindex ON tsigkeys(name, algorithm);
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"""
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name = models.CharField(max_length=255)
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algorithm = models.CharField(max_length=50)
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secret = models.CharField(max_length=255)
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# check constraint is added via RunSQL in migration
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class Meta:
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unique_together = [
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['name', 'algorithm']
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]
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