Skip zone overlap check with auto-reverse

Skip the existing reverse zone overlap check during DNS installation
when both --auto-reverse and --allow-zone-overlap arguments are
provided.

https://pagure.io/freeipa/issue/7239

Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

ipaserver/install/bindinstance.py

@@ -312,7 +312,7 @@ def read_reverse_zone(default, ip_address, allow_zone_overlap=False):
     return normalize_zone(zone)
 
 
-def get_auto_reverse_zones(ip_addresses):
+def get_auto_reverse_zones(ip_addresses, allow_zone_overlap=False):
     auto_zones = []
     for ip in ip_addresses:
         if ipautil.reverse_record_exists(ip):
@@ -320,12 +320,13 @@ def get_auto_reverse_zones(ip_addresses):
             logger.info("Reverse record for IP address %s already exists", ip)
             continue
         default_reverse = get_reverse_zone_default(ip)
-        try:
-            dnsutil.check_zone_overlap(default_reverse)
-        except ValueError:
-            logger.info("Reverse zone %s for IP address %s already exists",
-                        default_reverse, ip)
-            continue
+        if not allow_zone_overlap:
+            try:
+                dnsutil.check_zone_overlap(default_reverse)
+            except ValueError:
+                logger.info("Reverse zone %s for IP address %s already exists",
+                            default_reverse, ip)
+                continue
         auto_zones.append((ip, default_reverse))
     return auto_zones
 
@@ -503,7 +504,8 @@ def check_reverse_zones(ip_addresses, reverse_zones, options, unattended,
             ips_missing_reverse.append(ip)
 
     # create reverse zone for IP addresses that does not have one
-    for (ip, rz) in get_auto_reverse_zones(ips_missing_reverse):
+    for (ip, rz) in get_auto_reverse_zones(ips_missing_reverse,
+                                           options.allow_zone_overlap):
         if options.auto_reverse:
             logger.info("Reverse zone %s will be created", rz)
             checked_reverse_zones.append(rz)