Implement max_fail_percentage and any_errors_fatal support

Fixes #11997

lib/ansible/executor/playbook_executor.py

@@ -128,15 +128,29 @@ class PlaybookExecutor:
                                 self._tqm.send_callback('v2_playbook_on_play_start', new_play)
                                 self._tqm.send_callback('v2_playbook_on_no_hosts_matched')
                                 break
+
                             # restrict the inventory to the hosts in the serialized batch
                             self._inventory.restrict_to_hosts(batch)
                             # and run it...
                             result = self._tqm.run(play=play)
-                            # if the last result wasn't zero, break out of the serial batch loop
-                            if result != 0:
+
+                            # check the number of failures here, to see if they're above the maximum
+                            # failure percentage allowed, or if any errors are fatal. If either of those
+                            # conditions are met, we break out, otherwise we only break out if the entire
+                            # batch failed
+                            failed_hosts_count = len(self._tqm._failed_hosts) + len(self._tqm._unreachable_hosts)
+                            if new_play.any_errors_fatal and failed_hosts_count > 0:
+                                break
+                            elif new_play.max_fail_percentage is not None and \
+                               int((new_play.max_fail_percentage)/100.0 * len(batch)) > int((len(batch) - failed_hosts_count) / len(batch) * 100.0):
+                                break
+                            elif len(batch) == failed_hosts_count:
                                 break
 
-                        # if the last result wasn't zero, break out of the play loop
+                            # clear the failed hosts dictionaires in the TQM for the next batch
+                            self._tqm.clear_failed_hosts()
+
+                        # if the last result wasn't zero, break out of the serial batch loop
                         if result != 0:
                             break
 

lib/ansible/executor/task_queue_manager.py

@@ -210,6 +210,10 @@ class TaskQueueManager:
             main_q.close()
             worker_prc.terminate()
 
+    def clear_failed_hosts(self):
+        self._failed_hosts      = dict()
+        self._unreachable_hosts = dict()
+
     def get_inventory(self):
         return self._inventory