#9 add PodDisruptionBudget

pykube/__init__.py

@@ -24,6 +24,7 @@
     PersistentVolume,
     PersistentVolumeClaim,
     Pod,
+    PodDisruptionBudget,
     PodSecurityPolicy,
     ReplicationController,
     ReplicaSet,

pykube/config.py

@@ -60,13 +60,15 @@ def from_service_account(cls, path="/var/run/secrets/kubernetes.io/serviceaccoun
         return self
 
     @classmethod
-    def from_file(cls, filename, **kwargs):
+    def from_file(cls, filename=None, **kwargs):
         """
         Creates an instance of the KubeConfig class from a kubeconfig file.
 
         :Parameters:
            - `filename`: The full path to the configuration file
         """
+        if not filename:
+            filename = os.getenv('KUBECONFIG', '~/.kube/config')
         filename = os.path.expanduser(filename)
         if not os.path.isfile(filename):
             raise exceptions.PyKubeError("Configuration file {} not found".format(filename))

pykube/objects.py

@@ -464,3 +464,10 @@ class PodSecurityPolicy(APIObject):
     version = "extensions/v1beta1"
     endpoint = "podsecuritypolicies"
     kind = "PodSecurityPolicy"
+
+
+class PodDisruptionBudget(APIObject):
+
+    version = "policy/v1beta1"
+    endpoint = "poddisruptionbudgets"
+    kind = "PodDisruptionBudget"

tests/test_config.py

@@ -6,6 +6,7 @@
 import pytest
 
 from pathlib import Path
+from unittest.mock import MagicMock
 
 from pykube import config, exceptions
 
@@ -46,6 +47,36 @@ def test_from_url():
     assert 'users' not in cfg.doc
 
 
+@pytest.fixture
+def kubeconfig(tmpdir):
+    kubeconfig = tmpdir.join('kubeconfig')
+    kubeconfig.write('''
+apiVersion: v1
+clusters:
+- cluster: {server: 'https://localhost:9443'}
+  name: test
+contexts:
+- context: {cluster: test, user: test}
+  name: test
+current-context: test
+kind: Config
+preferences: {}
+users:
+- name: test
+  user: {token: testtoken}
+    ''')
+    return kubeconfig
+
+
+def test_from_default_kubeconfig(monkeypatch, kubeconfig):
+    mock = MagicMock()
+    mock.return_value = str(kubeconfig)
+    monkeypatch.setattr('os.path.expanduser', mock)
+    cfg = config.KubeConfig.from_file()
+    mock.assert_called_with('~/.kube/config')
+    assert cfg.doc['clusters'][0]['cluster'] == {'server': 'https://localhost:9443'}
+
+
 class TestConfig(TestCase):
 
     def setUp(self):