pipeline: remove polling fallback support

This removes the support for loading configuration of polling from the
pipeline.

Change-Id: I9f26f9d665a942b91191bbef5ed3e082b4fbf97b

ceilometer/pipeline.py

@@ -871,13 +871,7 @@ class PollingManager(ConfigManagerBase):
 
         """
         super(PollingManager, self).__init__(conf)
-        try:
-            cfg = self.load_config(cfg_file)
-        except (TypeError, IOError):
-            LOG.warning('Using the pipeline configuration for polling '
-                        'is deprecated. %s should '
-                        'be used instead.', cfg_file)
-            cfg = self.load_config(conf.pipeline_cfg_file)
+        cfg = self.load_config(cfg_file)
         self.sources = []
         if 'sources' not in cfg:
             raise PollingException("sources required", cfg)

ceilometer/tests/unit/agent/agentbase.py

@@ -19,13 +19,10 @@
 import abc
 import copy
 import datetime
-import os
-import tempfile
 
 import mock
 import six
 from stevedore import extension
-import yaml
 
 from ceilometer.agent import plugin_base
 from ceilometer import pipeline
@@ -362,33 +359,6 @@ class BaseAgentManagerTestCase(base.BaseTestCase):
         self.addCleanup(mgr.terminate)
         mgr.create_polling_task.assert_called_once_with()
 
-    def test_agent_manager_start_fallback(self):
-        pipeline_cfg = {
-            'sources': [{
-                'name': 'test_pipeline',
-                'interval': 60,
-                'meters': ['test'],
-                'resources': ['test://'],
-                'sinks': ['test_sink']}],
-            'sinks': [{
-                'name': 'test_sink',
-                'transformers': [],
-                'publishers': ["test"]}]
-        }
-        tmp_cfg = tempfile.NamedTemporaryFile(mode='w', delete=False)
-        tmp_cfg.write(yaml.safe_dump(pipeline_cfg))
-        tmp_cfg.close()
-        self.CONF.set_override('pipeline_cfg_file', tmp_cfg.name)
-        self.CONF.set_override('cfg_file', None, group='polling')
-
-        mgr = self.create_manager()
-        mgr.extensions = self.mgr.extensions
-        mgr.create_polling_task = mock.MagicMock()
-        mgr.run()
-        self.addCleanup(mgr.terminate)
-        self.addCleanup(os.unlink, tmp_cfg.name)
-        mgr.create_polling_task.assert_called_once_with()
-
     def test_manager_exception_persistency(self):
         self.polling_cfg['sources'].append({
             'name': 'test_polling_1',

releasenotes/notes/pipeline-fallback-polling-3d962a0fff49ccdd.yaml

@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    The deprecated support of configure polling in the `pipeline.yaml` file has
+    been removed. Ceilometer now only uses the `polling.yaml` file for polling
+    configuration.