Allow optional list of YAML objects as param to create_from_yaml util

kubernetes/e2e_test/test_utils.py

@@ -13,8 +13,10 @@
 # under the License.
 
 import unittest
+from os import path
 
 import yaml
+
 from kubernetes import utils, client
 from kubernetes.client.rest import ApiException
 from kubernetes.e2e_test import base
@@ -37,6 +39,7 @@ class TestUtils(unittest.TestCase):
         k8s_client = client.api_client.ApiClient(configuration=cls.config)
         core_v1 = client.CoreV1Api(api_client=k8s_client)
         core_v1.delete_namespace(name=cls.test_namespace)
+
     # Tests for creating individual API objects
 
     def test_create_apps_deployment_from_yaml(self):
@@ -59,6 +62,31 @@ class TestUtils(unittest.TestCase):
             except ApiException:
                 continue
 
+    def test_create_apps_deployment_from_yaml_object(self):
+        """
+        Should be able to pass YAM objects directly to helper function.
+        """
+        k8s_client = client.api_client.ApiClient(configuration=self.config)
+        _path = self.path_prefix + "apps-deployment.yaml"
+        with open(path.abspath(_path)) as f:
+            yaml_objects = yaml.safe_load_all(f)
+            utils.create_from_yaml(
+                k8s_client,
+                yaml_objects=yaml_objects,
+            )
+        app_api = client.AppsV1Api(k8s_client)
+        dep = app_api.read_namespaced_deployment(name="nginx-app",
+                                                 namespace="default")
+        self.assertIsNotNone(dep)
+        while True:
+            try:
+                app_api.delete_namespaced_deployment(
+                    name="nginx-app", namespace="default",
+                    body={})
+                break
+            except ApiException:
+                continue
+
     def test_create_apps_deployment_from_yaml_obj(self):
         k8s_client = client.api_client.ApiClient(configuration=self.config)
         with open(self.path_prefix + "apps-deployment.yaml") as f:

kubernetes/utils/create_from_yaml.py

@@ -26,7 +26,8 @@ LOWER_OR_NUM_FOLLOWED_BY_UPPER_RE = re.compile('([a-z0-9])([A-Z])')
 
 def create_from_yaml(
         k8s_client,
-        yaml_file,
+        yaml_file=None,
+        yaml_objects=None,
         verbose=False,
         namespace="default",
         **kwargs):
@@ -36,6 +37,8 @@ def create_from_yaml(
     Input:
     yaml_file: string. Contains the path to yaml file.
     k8s_client: an ApiClient object, initialized with the client args.
+    yaml_objects: List[dict]. Optional list of YAML objects; used instead
+        of reading the `yaml_file`. Default is None.
     verbose: If True, print confirmation from the create action.
         Default is False.
     namespace: string. Contains the namespace to create all
@@ -62,12 +65,11 @@ def create_from_yaml(
         FailToCreateError which holds list of `client.rest.ApiException`
         instances for each object that failed to create.
     """
-    with open(path.abspath(yaml_file)) as f:
-        yml_document_all = yaml.safe_load_all(f)
 
+    def create_with(objects):
         failures = []
         k8s_objects = []
-        for yml_document in yml_document_all:
+        for yml_document in objects:
             if yml_document is None:
                 continue
             try:
@@ -79,9 +81,19 @@ def create_from_yaml(
                 failures.extend(failure.api_exceptions)
         if failures:
             raise FailToCreateError(failures)
-
         return k8s_objects
 
+    if yaml_objects:
+        yml_document_all = yaml_objects
+        return create_with(yml_document_all)
+    elif yaml_file:
+        with open(path.abspath(yaml_file)) as f:
+            yml_document_all = yaml.safe_load_all(f)
+            return create_with(yml_document_all)
+    else:
+        raise ValueError(
+            'One of `yaml_file` or `yaml_objects` arguments must be provided')
+
 
 def create_from_dict(k8s_client, data, verbose=False, namespace='default',
                      **kwargs):