1 files changed, 18 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
         }