Make exception printing a bit smarter

lib/ansible/plugins/action/__init__.py

@@ -405,7 +405,7 @@ class ActionBase:
             # not valid json, lets try to capture error
             data = dict(failed=True, parsed=False)
             if 'stderr' in res and res['stderr'].startswith('Traceback'):
-                data['traceback'] = res['stderr']
+                data['exception'] = res['stderr']
             else:
                 data['msg'] = res.get('stdout', '')
                 if 'stderr' in res:

lib/ansible/plugins/callback/default.py

@@ -37,10 +37,24 @@ class CallbackModule(CallbackBase):
         pass
 
     def v2_runner_on_failed(self, result, ignore_errors=False):
-        if 'exception' in result._result and self._display.verbosity < 3:
+        if 'exception' in result._result:
+            if self._display.verbosity < 3:
+                # extract just the actual error message from the exception text
+                error = result._result['exception'].strip().split('\n')[-1]
+                msg = "An exception occurred during task execution. To see the full traceback, use -vvv. The error was: %s" % error
+            else:
+                msg = "An exception occurred during task execution. The full traceback is:\n" + result._result['exception']
+
+            self._display.display(msg, color='red')
+
+            # finally, remove the exception from the result so it's not shown every time
             del result._result['exception']
+
         self._display.display("fatal: [%s]: FAILED! => %s" % (result._host.get_name(), json.dumps(result._result, ensure_ascii=False)), color='red')
 
+        if result._task.ignore_errors:
+            self._display.display("...ignoring")
+
     def v2_runner_on_ok(self, result):
 
         if result._task.action == 'include':