Add basic tests for pacemker-remote. (#201)

Add a basic check to ensure all nodes, including remotes, in
hacluster are online.

zaza/charm_tests/pacemaker_remote/__init__.py

@@ -0,0 +1,15 @@
+# Copyright 2019 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Collection of code for setting up and testing pacemaker-remote."""

zaza/charm_tests/pacemaker_remote/tests.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+# Copyright 2019 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Encapsulate pacemaker-remote testing."""
+
+import logging
+import unittest
+import xml.etree.ElementTree as ET
+
+import zaza.model
+
+
+class PacemakerRemoteTest(unittest.TestCase):
+    """Encapsulate pacemaker-remote tests."""
+
+    def test_check_nodes_online(self):
+        """Test that all nodes are online."""
+        status_cmd = 'crm status --as-xml'
+        status_xml = zaza.model.run_on_leader('api', status_cmd)['Stdout']
+        root = ET.fromstring(status_xml)
+        for child in root:
+            if child.tag == 'nodes':
+                for node in child:
+                    logging.info(
+                        'Node {name} of type {type} is '
+                        '{online}'.format(**node.attrib))
+                    self.assertEqual(node.attrib['online'], "true")