bug 1489498. preserve replica and shard settings

2 files changed, 52 insertions, 1 deletions

diff --git a/roles/openshift_logging/filter_plugins/openshift_logging.py b/roles/openshift_logging/filter_plugins/openshift_logging.py
index 330e7e59a..959573635 100644
--- a/roles/openshift_logging/filter_plugins/openshift_logging.py
+++ b/roles/openshift_logging/filter_plugins/openshift_logging.py
@@ -17,6 +17,22 @@ def es_storage(os_logging_facts, dc_name, pvc_claim, root='elasticsearch'):
     return dict(kind='emptydir')
 
 
+def walk(source, path, default, delimiter='.'):
+    '''Walk the sourch hash given the path and return the value or default if not found'''
+    if not isinstance(source, dict):
+        raise RuntimeError('The source is not a walkable dict: {} path: {}'.format(source, path))
+    keys = path.split(delimiter)
+    max_depth = len(keys)
+    cur_depth = 0
+    while cur_depth < max_depth:
+        if keys[cur_depth] in source:
+            source = source[keys[cur_depth]]
+            cur_depth = cur_depth + 1
+        else:
+            return default
+    return source
+
+
 def random_word(source_alpha, length):
     ''' Returns a random word given the source of characters to pick from and resulting length '''
     return ''.join(random.choice(source_alpha) for i in range(length))
@@ -73,5 +89,6 @@ class FilterModule(object):
             'map_from_pairs': map_from_pairs,
             'es_storage': es_storage,
             'serviceaccount_name': serviceaccount_name,
-            'serviceaccount_namespace': serviceaccount_namespace
+            'serviceaccount_namespace': serviceaccount_namespace,
+            'walk': walk
         }
diff --git a/roles/openshift_logging/filter_plugins/test b/roles/openshift_logging/filter_plugins/test
new file mode 100644
index 000000000..3ad956cca
--- /dev/null
+++ b/roles/openshift_logging/filter_plugins/test
@@ -0,0 +1,34 @@
+import unittest
+from openshift_logging import walk
+
+class TestFilterMethods(unittest.TestCase):
+
+
+    def test_walk_find_key(self):
+        source = {'foo': {'bar.xyz': 'myvalue'}}
+        self.assertEquals(walk(source,'foo#bar.xyz', 123, delimiter='#'), 'myvalue')
+
+
+    def test_walk_return_default(self):
+        source = {'foo': {'bar.xyz': 'myvalue'}}
+        self.assertEquals(walk(source,'foo#bar.abc', 123, delimiter='#'), 123)
+
+
+    def test_walk_limit_max_depth(self):
+        source = {'foo': {'bar.xyz': 'myvalue'}}
+        self.assertEquals(walk(source,'foo#bar.abc#dontfindme', 123, delimiter='#'), 123)
+
+    def test_complex_hash(self):
+        source = {
+            'elasticsearch': {
+                'configmaps': {
+                    'logging-elasticsearch': {
+                        'elasticsearch.yml':  "a string value"
+                    } 
+                }
+            }
+        } 
+        self.assertEquals(walk(source,'elasticsearch#configmaps#logging-elasticsearch#elasticsearch.yml', 123, delimiter='#'), "a string value")
+
+if __name__ == '__main__':
+    unittest.main()