This document is about PowerDNS 4.X. If you have PowerDNS 3.X, please see the PowerDNS 3.X documentation

Generic PostgreSQL backend

Native Yes
Master Yes
Slave Yes
Superslave Yes
Autoserial Yes (v3.1 and up)
Case All lower
DNSSEC Yes (set gpgsql-dnssec)
Disabled data Yes (v3.4.0 and up)
Comments Yes (v3.4.0 and up)
Module name pgsql
Launch name pgsql

This PostgreSQL backend is based on the generic SQL backend. The default setup conforms to the schema at the bottom of this page, note that zone2sql with the --gpgsql flag also assumes this layout is in place.

This schema contains all elements needed for master, slave and superslave operation. For full migration notes, please see Migration.

With PostgreSQL, you may have to run createdb pdns first and then connect to that database with psql pdns, and feed it the schema above.

Settings

gpgsql-host

Host (ip address) to connect to. If pgsql-host begins with a slash, it specifies Unix-domain communication rather than TCP/IP communication; the value is the name of the directory in which the socket file is stored.

WARNING: When specified as a hostname a chicken/egg situation might arise where the database is needed to resolve the IP address of the database. It is best to supply an IP address of the database here.

gpgsql-port

The port to connect to on gpgsql-host. Default: 5432

gpgsql-dbname

Name of the database to connect to. Default: "pdns".

gpgsql-user

User to connect as. Default: "powerdns".

gpgsql-password

The password to for gpgsql-user.

gpgsql-dnssec

Enable DNSSEC processing for this backend. Default=no.

gpsql-extra-connection-parameters

Extra connection parameters to forward to postgres. If you want to pin a specific certificate for the connection you should set this to sslmode=verify-full sslrootcert=<path-to-CA-cert>. Accepted parameters are documented in the PostgreSQL documentation.

Default schema

CREATE TABLE domains (
  id                    SERIAL PRIMARY KEY,
  name                  VARCHAR(255) NOT NULL,
  master                VARCHAR(128) DEFAULT NULL,
  last_check            INT DEFAULT NULL,
  type                  VARCHAR(6) NOT NULL,
  notified_serial       INT DEFAULT NULL,
  account               VARCHAR(40) DEFAULT NULL,
  CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
);

CREATE UNIQUE INDEX name_index ON domains(name);


CREATE TABLE records (
  id                    SERIAL PRIMARY KEY,
  domain_id             INT DEFAULT NULL,
  name                  VARCHAR(255) DEFAULT NULL,
  type                  VARCHAR(10) DEFAULT NULL,
  content               VARCHAR(65535) DEFAULT NULL,
  ttl                   INT DEFAULT NULL,
  prio                  INT DEFAULT NULL,
  change_date           INT DEFAULT NULL,
  disabled              BOOL DEFAULT 'f',
  ordername             VARCHAR(255),
  auth                  BOOL DEFAULT 't',
  CONSTRAINT domain_exists
  FOREIGN KEY(domain_id) REFERENCES domains(id)
  ON DELETE CASCADE,
  CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
);

CREATE INDEX rec_name_index ON records(name);
CREATE INDEX nametype_index ON records(name,type);
CREATE INDEX domain_id ON records(domain_id);
CREATE INDEX recordorder ON records (domain_id, ordername text_pattern_ops);


CREATE TABLE supermasters (
  ip                    INET NOT NULL,
  nameserver            VARCHAR(255) NOT NULL,
  account               VARCHAR(40) NOT NULL,
  PRIMARY KEY(ip, nameserver)
);


CREATE TABLE comments (
  id                    SERIAL PRIMARY KEY,
  domain_id             INT NOT NULL,
  name                  VARCHAR(255) NOT NULL,
  type                  VARCHAR(10) NOT NULL,
  modified_at           INT NOT NULL,
  account               VARCHAR(40) DEFAULT NULL,
  comment               VARCHAR(65535) NOT NULL,
  CONSTRAINT domain_exists
  FOREIGN KEY(domain_id) REFERENCES domains(id)
  ON DELETE CASCADE,
  CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
);

CREATE INDEX comments_domain_id_idx ON comments (domain_id);
CREATE INDEX comments_name_type_idx ON comments (name, type);
CREATE INDEX comments_order_idx ON comments (domain_id, modified_at);


CREATE TABLE domainmetadata (
  id                    SERIAL PRIMARY KEY,
  domain_id             INT REFERENCES domains(id) ON DELETE CASCADE,
  kind                  VARCHAR(32),
  content               TEXT
);

CREATE INDEX domainidmetaindex ON domainmetadata(domain_id);


CREATE TABLE cryptokeys (
  id                    SERIAL PRIMARY KEY,
  domain_id             INT REFERENCES domains(id) ON DELETE CASCADE,
  flags                 INT NOT NULL,
  active                BOOL,
  content               TEXT
);

CREATE INDEX domainidindex ON cryptokeys(domain_id);


CREATE TABLE tsigkeys (
  id                    SERIAL PRIMARY KEY,
  name                  VARCHAR(255),
  algorithm             VARCHAR(50),
  secret                VARCHAR(255),
  CONSTRAINT c_lowercase_name CHECK (((name)::TEXT = LOWER((name)::TEXT)))
);

CREATE UNIQUE INDEX namealgoindex ON tsigkeys(name, algorithm);