update for actual _lib code

* add: soa_mk(), csum_exists()

Makefile

@@ -26,6 +26,9 @@ PGPASSWORD   ?=
 #- ACME zone suffix
 ACME_DOMAIN  ?=
 
+#- This NS hostname for use in all SOA
+NSERVER      ?=
+
 # ------------------------------------------------------------------------------
 
 all: help
@@ -50,7 +53,7 @@ update: $(OBJECTS)
 %.done: %.sql
 	@echo "*** $< ***"
 	@csum=$$(md5sum $< | sed 's/ .*//') ; \
-	  cat $< | docker exec -i $$PG_CONTAINER psql -U $$PGUSER -d $$PGDATABASE -vcsum=$$csum -vACME_DOMAIN=$(ACME_DOMAIN) > $@
+	  cat $< | docker exec -i $$PG_CONTAINER psql -U $$PGUSER -d $$PGDATABASE -vcsum=$$csum -vACME_DOMAIN=$(ACME_DOMAIN) -vNSERVER=$(NSERVER) > $@
 
 ## Load updated zone files via psql connection
 update-direct: $(CFG) $(OBJECTSDIRECT)
@@ -94,7 +97,7 @@ config: $(CFG).sample
 
 ## Remove .done files
 clean:
-	rm -rf *.done
+	rm -rf $(OBJECTS)
 
 # This code handles group header and target comment with one or two lines only
 ## list Makefile targets

_lib.sql

@@ -40,7 +40,10 @@ SELECT x, soa_upd(x) FROM unnest(ARRAY[
 ]) x;
 */
 
-CREATE OR REPLACE FUNCTION domain_id(a_name TEXT, a_type TEXT DEFAULT 'NATIVE') RETURNS INTEGER AS $_$
+-- result was changed to bigint
+DROP FUNCTION IF EXISTS domain_id(text,text);
+
+CREATE OR REPLACE FUNCTION domain_id(a_name TEXT, a_type TEXT DEFAULT 'NATIVE') RETURNS BIGINT AS $_$
 /*
   Вернуть ID домена, создав его при необходимости
 */
@@ -58,7 +61,7 @@ BEGIN
 END
 $_$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE PROCEDURE acme_insert(a_domain_id INT, a_name TEXT, a_ip TEXT, a_ttl INT) AS $_$
+CREATE OR REPLACE PROCEDURE acme_insert(a_domain_id BIGINT, a_name TEXT, a_ip TEXT, a_ttl INT) AS $_$
 /*
   Добавление в зону для заданного a_ip записей для передачи ему контроля над зоной a_name.
   Это используется в DNS-01 challenge ACME
@@ -76,3 +79,70 @@ BEGIN
   ;
 END;
 $_$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION soa_mk(
+  a_domain_id BIGINT
+, a_ns_admin TEXT
+, a_refresh  INTEGER DEFAULT  10800 -- 3 hours
+, a_retry    INTEGER DEFAULT   3600 -- 1 hour
+, a_expire   INTEGER DEFAULT 604800 -- 7 days
+, a_ttl      INTEGER DEFAULT   1800 -- 30 min
+) RETURNS TEXT AS $_$
+/*
+  Получить новый серийный номер зоны, проверить наличие NSERVER и вернуть строку SOA
+
+  refresh -- time lag until the slave again asks the master for a current version of the zone file
+  retry   -- Should this request go unanswered, the “Retry” field regulates when a new attempt is to be carried out (< refresh)
+  expire  -- determines how long the zone file may still be used before the server refuses DNS information delivery
+  ttl     -- how long a client may hold the requested information in the cache before a new request must be sent
+
+  Each value in seconds
+*/
+DECLARE
+  v_ns        text := current_setting('vars.ns');   -- master DNS host
+  v_stamp     text;                       -- zone SOA timestamp
+  v_stamp_old text;                       -- previous zone SOA timestamp
+BEGIN
+  -- check NSERVER
+  IF coalesce(v_ns,'') = '' THEN
+    RAISE EXCEPTION 'NSERVER is not set';
+  END IF;
+  -- calculate SOA with next serial
+  SELECT INTO v_stamp_old split_part(content, ' ', 3) FROM records WHERE domain_id = a_domain_id AND type = 'SOA';
+  v_stamp := soa_upd(v_stamp_old);
+
+  RETURN concat_ws(' ', v_ns, a_ns_admin, v_stamp, a_refresh, a_retry, a_expire, a_ttl);
+END;
+$_$ LANGUAGE plpgsql;
+
+
+CREATE OR REPLACE FUNCTION csum_exists(a_domain_id BIGINT) RETURNS BOOL AS $_$
+/*
+  Проверить совпадение vars.csum с загруженным в БД прошлый раз.
+  Если нет таблицы dcape_csum - создать ее
+  Если csum отличается - обновить
+*/
+DECLARE
+  v_csum     text := current_setting('vars.csum');   -- file csum
+  v_csum_old text;
+BEGIN
+  RAISE NOTICE 'Source csum: %', v_csum;
+  IF to_regclass('public.dcape_csum') IS NULL THEN
+    CREATE TABLE dcape_csum(
+      domain_id bigint primary key REFERENCES domains(id) ON DELETE CASCADE
+    , csum text
+    , updated_at timestamptz(0)
+    );
+  ELSE
+    SELECT INTO v_csum_old csum FROM dcape_csum WHERE domain_id = a_domain_id;
+  END IF;
+  IF v_csum_old IS NULL THEN
+    INSERT INTO dcape_csum(domain_id, csum, updated_at) VALUES (a_domain_id, v_csum, now());
+  ELSIF v_csum_old <> v_csum THEN
+    UPDATE dcape_csum SET csum = v_csum, updated_at = now() WHERE domain_id = a_domain_id;
+  ELSE
+    RETURN TRUE;
+  END IF;
+  RETURN FALSE;
+END;
+$_$ LANGUAGE plpgsql;

acme.sql.sample

@@ -8,11 +8,14 @@
 -- This var must be set in psql args
 SET vars.domain TO :'ACME_DOMAIN';
 
+-- This zone copy hostname
+SET vars.ns   TO :'NSERVER';
+
 DO $_$
 DECLARE
   v_domain    text := 'acme-' || current_setting('vars.domain'); -- domain name
-  v_ns        text := 'ns.'   || current_setting('vars.domain'); -- master DNS host
   v_ns_admin  text := 'admin.'|| current_setting('vars.domain'); -- master DNS admin email
+  v_ns        text := current_setting('vars.ns');                -- master DNS host
 
   v_refresh   int  :=  10800;
   v_retry     int  :=   3600;
@@ -20,8 +23,6 @@ DECLARE
   v_ttl       int  :=   1800;
 
   v_domain_id integer;  -- internal domain id
-  v_stamp     text;     -- zone timestamp
-  v_stamp_old text;     -- previous zone SOA timestamp
   v_soa       text;     -- zone SOA
 
 BEGIN
@@ -31,12 +32,12 @@ BEGIN
     RETURN;
   END IF;
 
-  RAISE NOTICE 'Setup acme zone % for nameserver %',v_domain,v_ns;
+  RAISE NOTICE 'Setup acme zone % for nameserver %', v_domain, v_ns;
 
   SELECT INTO v_domain_id id FROM domains WHERE name = v_domain;
   IF FOUND THEN
     -- no any changes needed after creation
-    RAISE NOTICE 'Zone already exists. Skipping';
+    RAISE NOTICE 'Zone % already exists. Skipping', v_domain;
     RETURN;
   END IF;
 

domain.sql.sample

@@ -2,49 +2,40 @@
   Complete PowerDNS zone records
 */
 
+-- This file control sum
+SET vars.csum TO :'csum';
+-- This zone copy hostname
+SET vars.ns   TO :'NSERVER';
+
 DO $_$
 DECLARE
   v_domain    text := 'dev.lan';          -- domain name
+  v_ns_admin  text := 'admin.ns.dev.lan'; -- master DNS admin email
   v_ip        text := '127.0.0.1';        -- base ip
   v_ip1       text := '127.0.1.1';        -- some another ip
-  v_ns        text := 'ns.dev.lan';       -- master DNS host
-  v_ns_admin  text := 'admin.ns.dev.lan'; -- master DNS admin email
+  v_ttl       INTEGER := 60;              -- 1 min
   v_domain_id integer;                    -- internal domain id
-  v_stamp     text;                       -- zone SOA timestamp
-  v_stamp_old text;                       -- previous zone SOA timestamp
   v_soa       text;                       -- zone SOA
-
-  v_refresh   int  :=  10800;
-  v_retry     int  :=   3600;
-  v_expire    int  := 604800;
-  v_ttl       int  :=   1800;
-
-/*
-  refresh -- time lag until the slave again asks the master for a current version of the zone file
-  retry   -- Should this request go unanswered, the “Retry” field regulates when a new attempt is to be carried out (< refresh)
-  expire  -- determines how long the zone file may still be used before the server refuses DNS information delivery
-  ttl     -- how long a client may hold the requested information in the cache before a new request must be sent
-
-  Each value in seconds
-*/
-
 BEGIN
   v_domain_id := domain_id(v_domain);
 
-  -- calculate SOA with next serial
-  SELECT INTO v_stamp_old split_part(content, ' ', 3) FROM records WHERE domain_id = v_domain_id AND type = 'SOA';
-  v_stamp := soa_upd(v_stamp_old);
-  v_soa := concat_ws(' ', v_ns, v_ns_admin, v_stamp, v_refresh, v_retry, v_expire, v_ttl);
+  -- check csum, do not run twice
+  IF csum_exists(v_domain_id) THEN
+    RAISE NOTICE 'Domain % does not changed. Skipping', v_domain;
+    RETURN;
+  END IF;
 
   -- clear zone
   DELETE FROM records WHERE domain_id = v_domain_id;
 
+  v_soa := soa_mk(v_domain_id, v_ns_admin);
+
   -- all zone records are following here
-  INSERT INTO records (domain_id, name, ttl, type, prio, content) VALUES 
-    (v_domain_id, v_domain, 60,  'SOA', 0, v_soa)
-  , (v_domain_id, v_domain, v_ttl, 'NS', 0, 'ns.' || v_domain)
-  , (v_domain_id, v_domain, v_ttl, 'MX', 5, 'mail.' || v_domain)
-  , (v_domain_id, v_domain, v_ttl,'TXT', 0, 'v=spf1 mx ~all')
+  INSERT INTO records (domain_id, name, ttl, type, prio, content) VALUES
+    (v_domain_id, v_domain, v_ttl, 'SOA', 0, v_soa)
+  , (v_domain_id, v_domain, v_ttl, 'NS',  0, 'ns.' || v_domain)
+  , (v_domain_id, v_domain, v_ttl, 'MX',  5, 'mail.' || v_domain)
+  , (v_domain_id, v_domain, v_ttl, 'TXT', 0, '"v=spf1 mx ~all"')
 
   , (v_domain_id,           v_domain, v_ttl, 'A', 0, v_ip)
   , (v_domain_id, 'www.' || v_domain, v_ttl, 'A', 0, v_ip)