cluster/ceph: fix setting pool placement rule

The crush_ruleset argument was replaced by crush_rule many releases ago.

Signed-off-by: Pierre Riteau <pierre@stackhpc.com>

Author: priteau

cluster/ceph.py

@@ -815,7 +815,7 @@ def mkpool(self, name, profile_name, application, base_name=None):
                 ruleset = crush_profile
             except ValueError:
                 ruleset = self.get_ruleset(crush_profile)
-            common.pdsh(settings.getnodes('head'), 'sudo %s -c %s osd pool set %s crush_ruleset %s' % (self.ceph_cmd, self.tmp_conf, name, crush_profile),
+            common.pdsh(settings.getnodes('head'), 'sudo %s -c %s osd pool set %s crush_rule %s' % (self.ceph_cmd, self.tmp_conf, name, crush_profile),
                         continue_if_error=False).communicate()
 
         logger.info('Checking Health after pool creation.')