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-- Copyright (C) 2012-2018 Internet Systems Consortium, Inc. ("ISC")
-- This Source Code Form is subject to the terms of the Mozilla Public
-- License, v. 2.0. If a copy of the MPL was not distributed with this
-- file, You can obtain one at http://mozilla.org/MPL/2.0/.
-- This is the Kea DHCP schema specification for PostgreSQL schema 1.0.
-- It is used to create a 1.0 schema database for testing kea-admin's
-- ability to upgrade Postgres databases.
-- The schema is reasonably portable (with the exception of some field types
-- specification, which are PostgreSQL-specific). Minor changes might be needed
-- for other databases.
-- To create the schema, either type the command:
-- psql -U <user> -W <password> <database> < dhcpdb_create.pgsql
-- ... at the command prompt, or log in to the PostgreSQL database and at the "postgres=#"
-- prompt, issue the command:
-- @dhcpdb_create.pgsql
-- Holds the IPv4 leases.
CREATE TABLE lease4 (
address BIGINT PRIMARY KEY NOT NULL, -- IPv4 address
hwaddr BYTEA, -- Hardware address
client_id BYTEA, -- Client ID
valid_lifetime BIGINT, -- Length of the lease (seconds)
expire TIMESTAMP WITH TIME ZONE, -- Expiration time of the lease
subnet_id BIGINT, -- Subnet identification
fqdn_fwd BOOLEAN, -- Has forward DNS update been performed by a server
fqdn_rev BOOLEAN, -- Has reverse DNS update been performed by a server
hostname VARCHAR(255) -- The FQDN of the client
);
-- Create search indexes for lease4 table
-- index by hwaddr and subnet_id
CREATE INDEX lease4_by_hwaddr_subnet_id ON lease4 (hwaddr, subnet_id);
-- index by client_id and subnet_id
CREATE INDEX lease4_by_client_id_subnet_id ON lease4 (client_id, subnet_id);
-- Holds the IPv6 leases.
-- N.B. The use of a VARCHAR for the address is temporary for development:
-- it will eventually be replaced by BINARY(16).
CREATE TABLE lease6 (
address VARCHAR(39) PRIMARY KEY NOT NULL, -- IPv6 address
duid BYTEA, -- DUID
valid_lifetime BIGINT, -- Length of the lease (seconds)
expire TIMESTAMP WITH TIME ZONE, -- Expiration time of the lease
subnet_id BIGINT, -- Subnet identification
pref_lifetime BIGINT, -- Preferred lifetime
lease_type SMALLINT, -- Lease type (see lease6_types
-- table for possible values)
iaid INT, -- See Section 12 of RFC 8415
prefix_len SMALLINT, -- For IA_PD only
fqdn_fwd BOOLEAN, -- Has forward DNS update been performed by a server
fqdn_rev BOOLEAN, -- Has reverse DNS update been performed by a server
hostname VARCHAR(255) -- The FQDN of the client
);
-- Create search indexes for lease4 table
-- index by iaid, subnet_id, and duid
CREATE INDEX lease6_by_iaid_subnet_id_duid ON lease6 (iaid, subnet_id, duid);
-- ... and a definition of lease6 types. This table is a convenience for
-- users of the database - if they want to view the lease table and use the
-- type names, they can join this table with the lease6 table
CREATE TABLE lease6_types (
lease_type SMALLINT PRIMARY KEY NOT NULL, -- Lease type code.
name VARCHAR(5) -- Name of the lease type
);
START TRANSACTION;
INSERT INTO lease6_types VALUES (0, 'IA_NA'); -- Non-temporary v6 addresses
INSERT INTO lease6_types VALUES (1, 'IA_TA'); -- Temporary v6 addresses
INSERT INTO lease6_types VALUES (2, 'IA_PD'); -- Prefix delegations
COMMIT;
-- Finally, the version of the schema. We start at 1.0 during development.
-- This table is only modified during schema upgrades. For historical reasons
-- (related to the names of the columns in the BIND 10 DNS database file), the
-- first column is called "version" and not "major".
-- Note: This MUST be kept in step with src/share/database/scripts/pgsql/dhcpdb_create.pgsql,
-- which defines the schema for the unit tests.
CREATE TABLE schema_version (
version INT PRIMARY KEY NOT NULL, -- Major version number
minor INT -- Minor version number
);
START TRANSACTION;
INSERT INTO schema_version VALUES (1, 0);
COMMIT;
-- Notes:
-- Indexes
-- =======
-- It is likely that additional indexes will be needed. However, the
-- increase in lookup performance from these will come at the expense
-- of a decrease in performance during insert operations due to the need
-- to update the indexes. For this reason, the need for additional indexes
-- will be determined by experiment during performance tests.
-- The most likely additional indexes will cover the following columns:
-- hwaddr and client_id
-- For lease stability: if a client requests a new lease, try to find an
-- existing or recently expired lease for it so that it can keep using the
-- same IP address.
-- Field Sizes
-- ===========
-- If any of the VARxxx field sizes are altered, the lengths in the PgSQL
-- backend source file (pgsql_lease_mgr.cc) must be correspondingly changed.
-- Portability
-- ===========
-- Some columns contain binary data so are stored as BYTEA instead of
-- VARCHAR. This may be non-portable between databases: in this case, the
-- definition should be changed to VARCHAR.
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