oo_filters.py: oo_set_node_label

filter_plugins/oo_filters.py

@@ -176,6 +176,38 @@ def oo_ec2_volume_definition(data, host_type, docker_ephemeral=False):
         return [root_vol, docker_vol]
     return [root_vol]
 
+def oo_set_node_label(arg, key, value, attr_key=None, attr_value=None):
+    ''' This cycles through openshift node definitions
+        (from "osc get nodes -o json"), and adds a label.
+
+        If attr_key and attr_value are set, this will only set the label on
+        nodes where the attribute matches the specified value.
+
+        Ex:
+        - shell: osc get nodes -o json
+          register: output
+
+        - set_fact:
+          node_facts: "{{ output.stdout
+                             | from_json
+                             | oo_set_node_label('region', 'infra',
+                                            'metadata.name', '172.16.17.43') }}"
+    '''
+
+    for item in arg['items']:
+        if attr_key and attr_value:
+            actual_attr_value = get_attr(item, attr_key)
+
+            if str(attr_value) != str(actual_attr_value):
+                continue # We only want to set the values on hosts with defined attributes
+
+        if 'labels' not in item['metadata']:
+            item['metadata']['labels'] = {}
+
+        item['metadata']['labels'][key] = value
+
+    return arg
+
 # disabling pylint checks for too-few-public-methods and no-self-use since we
 # need to expose a FilterModule object that has a filters method that returns
 # a mapping of filter names to methods.
@@ -192,5 +224,6 @@ class FilterModule(object):
             "oo_pdb": oo_pdb,
             "oo_prepend_strings_in_list": oo_prepend_strings_in_list,
             "oo_ami_selector": oo_ami_selector,
-            "oo_ec2_volume_definition": oo_ec2_volume_definition
+            "oo_ec2_volume_definition": oo_ec2_volume_definition,
+            "oo_set_node_label": oo_set_node_label
         }