CREATE TABLE host_network (
  public_ipv4_cidr_block  TEXT PRIMARY KEY NOT NULL,
  network_name       TEXT NOT NULL,
  host               TEXT NOT NULL REFERENCES hosts(id) ON DELETE RESTRICT,
);

INSERT INTO host_network (public_ipv4_cidr_block, network_name, host) VALUES ('baikal', 'virbr1', '69.61.2.162/27'),
                                                                        ('baikal', 'virbr2', '69.61.2.194/26');

ALTER TABLE vms ADD COLUMN network_name TEXT NOT NULL;
ALTER TABLE vms ADD FOREIGN KEY (host, network_name) REFERENCES host_network(host, network_name) ON DELETE RESTRICT;

UPDATE schemaversion SET version = 16;