rgw: Fix dynamic resharding not working for empty zonegroup in period

Sometimes when cluster has been upgraded from jewel, the period's zonegroup could be empty, so no dynamic resharding.
This fix should fix it and return true for less than 1 (0) zonegroup in period

Fixes: https://tracker.ceph.com/issues/43188
Signed-off-by: Or Friedmann <ofriedma@redhat.com>
(cherry picked from commit a76e4393728c3e74a943b635d2ac0652e0cc092a)

diff --git a/src/rgw/rgw_zone.h b/src/rgw/rgw_zone.h
index f0c8b7c60c16cc567d1b20b04fb2c0172ff02075..89f635a505d3c126a64ad3daa96ed14d7a38b906 100644 (file)
--- a/src/rgw/rgw_zone.h
+++ b/src/rgw/rgw_zone.h
@@ -1059,7 +1059,7 @@ public:
 
   bool is_single_zonegroup() const
   {
-      return (period_map.zonegroups.size() == 1);
+      return (period_map.zonegroups.size() <= 1);
   }
 
   /*