Add cache_file parameter for DynamicClient (#46)

changelogs/fragments/46-cachefile_dynamic_client.yml

@@ -0,0 +1,4 @@
+---
+minor_changes:
+- Add logic for cache file name generation (https://github.com/ansible-collections/kubernetes.core/pull/46).
+- Add cache_file when DynamicClient is created (https://github.com/ansible-collections/kubernetes.core/pull/46).

plugins/module_utils/cache.py

@@ -0,0 +1,55 @@
+# Copyright [2017] [Red Hat, Inc.]
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+import os
+
+from ansible.module_utils.six import PY3
+
+
+def get_user():
+    if hasattr(os, 'getlogin'):
+        try:
+            user = os.getlogin()
+            if user:
+                return str(user)
+        except OSError:
+            pass
+    if hasattr(os, 'getuid'):
+        try:
+            user = os.getuid()
+            if user:
+                return str(user)
+        except OSError:
+            pass
+    user = os.environ.get("USERNAME")
+    if user:
+        return str(user)
+    return None
+
+
+def get_default_cache_id(client):
+    user = get_user()
+    if user:
+        cache_id = "{0}-{1}".format(client.configuration.host, user)
+    else:
+        cache_id = client.configuration.host
+
+    if PY3:
+        return cache_id.encode('utf-8')
+
+    return cache_id

plugins/module_utils/common.py

@@ -23,11 +23,14 @@ import time
 import os
 import traceback
 import sys
+import tempfile
+import hashlib
 from datetime import datetime
 from distutils.version import LooseVersion
 
 from ansible_collections.kubernetes.core.plugins.module_utils.args_common import (AUTH_ARG_MAP, AUTH_ARG_SPEC)
 from ansible_collections.kubernetes.core.plugins.module_utils.hashes import generate_hash
+from ansible_collections.kubernetes.core.plugins.module_utils.cache import get_default_cache_id
 
 from ansible.module_utils.basic import missing_required_lib
 from ansible.module_utils.six import iteritems, string_types
@@ -101,7 +104,6 @@ except ImportError as e:
 
 
 def configuration_digest(configuration):
-    import hashlib
     m = hashlib.sha256()
     for k in AUTH_ARG_MAP:
         if not hasattr(configuration, k):
@@ -184,8 +186,15 @@ def get_api_client(module=None, **kwargs):
         client = get_api_client._pool[digest]
         return client
 
+    def generate_cache_file(kubeclient):
+        cache_file_name = 'k8srcp-{0}.json'.format(hashlib.sha256(get_default_cache_id(kubeclient)).hexdigest())
+        return os.path.join(tempfile.gettempdir(), cache_file_name)
+
+    kubeclient = kubernetes.client.ApiClient(configuration)
+    cache_file = generate_cache_file(kubeclient)
+
     try:
-        client = DynamicClient(kubernetes.client.ApiClient(configuration))
+        client = DynamicClient(kubeclient, cache_file)
     except Exception as err:
         _raise_or_fail(err, 'Failed to get client due to %s')