DNSSEC: Add ability to trigger full data synchronization to ipa-ods-exporter.

New exporter's command 'ipa-full-update' will resynchronize all zone
keys from ODS database to LDAP.

This command holds database lock for the whole time to avoid race
conditions so it should be used only in special cases, e.g. during
master server migration.

https://fedorahosted.org/freeipa/ticket/4657

Reviewed-By: Martin Basti <mbasti@redhat.com>

daemons/dnssec/ipa-ods-exporter

@@ -157,49 +157,42 @@ def get_ldap_keys(ldap, zone_dn):
     return ldap_keys
 
 def get_ods_keys(zone_name):
-    # Open DB directly and read key timestamps etc.
-    with ods_db_lock():
-        db = sqlite3.connect(paths.OPENDNSSEC_KASP_DB,
-                isolation_level="EXCLUSIVE")
-        db.row_factory = sqlite3.Row
-        db.execute('BEGIN')
+    # get zone ID
+    cur = db.execute("SELECT id FROM zones WHERE LOWER(name)=LOWER(?)",
+                     (zone_name,))
+    rows = cur.fetchall()
+    assert len(rows) == 1, "exactly one DNS zone should exist in ODS DB"
+    zone_id = rows[0][0]
 
-        # get zone ID
-        cur = db.execute("SELECT id FROM zones WHERE LOWER(name)=LOWER(?)",
-                         (zone_name,))
-        rows = cur.fetchall()
-        assert len(rows) == 1, "exactly one DNS zone should exist in ODS DB"
-        zone_id = rows[0][0]
+    # get all keys for given zone ID
+    cur = db.execute("SELECT kp.HSMkey_id, kp.generate, kp.algorithm, dnsk.publish, dnsk.active, dnsk.retire, dnsk.dead, dnsk.keytype "
+             "FROM keypairs AS kp JOIN dnsseckeys AS dnsk ON kp.id = dnsk.id "
+             "WHERE dnsk.zone_id = ?", (zone_id,))
+    keys = {}
+    for row in cur:
+        key_data = sql2datetimes(row)
+        if 'idnsSecKeyDelete' in key_data \
+            and key_data['idnsSecKeyDelete'] > datetime.now():
+                continue  # ignore deleted keys
 
-        # get all keys for given zone ID
-        cur = db.execute("SELECT kp.HSMkey_id, kp.generate, kp.algorithm, dnsk.publish, dnsk.active, dnsk.retire, dnsk.dead, dnsk.keytype "
-                 "FROM keypairs AS kp JOIN dnsseckeys AS dnsk ON kp.id = dnsk.id "
-                 "WHERE dnsk.zone_id = ?", (zone_id,))
-        keys = {}
-        for row in cur:
-            key_data = sql2datetimes(row)
-            if 'idnsSecKeyDelete' in key_data \
-                and key_data['idnsSecKeyDelete'] > datetime.now():
-                    continue  # ignore deleted keys
+        key_data.update(sql2ldap_flags(row['keytype']))
+        log.debug("%s", key_data)
+        assert key_data.get('idnsSecKeyZONE', None) == 'TRUE', \
+                'unexpected key type 0x%x' % row['keytype']
+        if key_data.get('idnsSecKeySEP', 'FALSE') == 'TRUE':
+            key_type = 'KSK'
+        else:
+            key_type = 'ZSK'
 
-            key_data.update(sql2ldap_flags(row['keytype']))
-            log.debug("%s", key_data)
-            assert key_data.get('idnsSecKeyZONE', None) == 'TRUE', \
-                    'unexpected key type 0x%x' % row['keytype']
-            if key_data.get('idnsSecKeySEP', 'FALSE') == 'TRUE':
-                key_type = 'KSK'
-            else:
-                key_type = 'ZSK'
+        key_data.update(sql2ldap_algorithm(row['algorithm']))
+        key_id = "%s-%s-%s" % (key_type,
+                               datetime2ldap(key_data['idnsSecKeyCreated']),
+                               row['HSMkey_id'])
 
-            key_data.update(sql2ldap_algorithm(row['algorithm']))
-            key_id = "%s-%s-%s" % (key_type,
-                                   datetime2ldap(key_data['idnsSecKeyCreated']),
-                                   row['HSMkey_id'])
+        key_data.update(sql2ldap_keyid(row['HSMkey_id']))
+        keys[key_id] = key_data
 
-            key_data.update(sql2ldap_keyid(row['HSMkey_id']))
-            keys[key_id] = key_data
-
-        return keys
+    return keys
 
 def sync_set_metadata_2ldap(log, source_set, target_set):
     """sync metadata from source key set to target key set in LDAP
@@ -365,11 +358,16 @@ def parse_command(cmd):
                 'HSM synchronization finished, exiting.',
                 None)
 
+    elif cmd == 'ipa-full-update':
+        return (None,
+                'Synchronization of all zones requested.',
+                None)
+
     elif not cmd.startswith('update '):
         return (0,
                 'Command "%s" is not supported by IPA; '
                 'HSM synchronization was finished and the command '
-                'will be ignored.\n' % cmd,
+                'will be ignored.' % cmd,
                 None)
 
     else:
@@ -394,6 +392,7 @@ def cmd2ods_zone_name(cmd):
     return zone_name
 
 def sync_zone(log, ldap, dns_dn, zone_name):
+    log.debug('synchronizing zone "%s"', zone_name)
     ods_keys = get_ods_keys(zone_name)
     ods_keys_id = set(ods_keys.keys())
 
@@ -530,6 +529,19 @@ if exitcode is not None:
 else:
     log.debug(msg)
 
-sync_zone(log, ldap, dns_dn, zone_name)
+# Open DB directly and read key timestamps etc.
+with ods_db_lock():
+    db = sqlite3.connect(paths.OPENDNSSEC_KASP_DB,
+            isolation_level="EXCLUSIVE")
+    db.row_factory = sqlite3.Row
+    db.execute('BEGIN')
+
+    if zone_name is not None:
+        # only one zone should be processed
+        sync_zone(log, ldap, dns_dn, zone_name)
+    else:
+        # process all zones
+        for zone_row in db.execute("SELECT name FROM zones"):
+            sync_zone(log, ldap, dns_dn, zone_row['name'])
 
 log.debug('Done')