1 files changed, 69 insertions, 0 deletions
diff --git a/compass-tasks/actions/patch.py b/compass-tasks/actions/patch.py
new file mode 100644
index 0000000..6d29be6
--- /dev/null
+++ b/compass-tasks/actions/patch.py
@@ -0,0 +1,69 @@
+# Copyright 2014 Huawei Technologies Co. Ltd
+#
+# 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.
+
+"""Module to patch an existing cluster
+"""
+import logging
+import simplejson as json
+
+from compass.actions import util
+from compass.db.api import cluster as cluster_db
+from compass.db.api import user as user_db
+from compass.deployment.deploy_manager import Patcher
+from compass.deployment.utils import constants as const
+
+
+def patch(cluster_id, username=None):
+    """Patch cluster.
+
+    :param cluster_id: id of the cluster
+    :type cluster_id: int
+
+    .. note::
+        The function should be called out of database session.
+    """
+    with util.lock('serialized_action', timeout=1000) as lock:
+        if not lock:
+            raise Exception('failed to acquire lock to deploy')
+
+        user = user_db.get_user_object(username)
+        cluster_hosts = cluster_db.list_cluster_hosts(cluster_id, user)
+        hosts_id_list = [host['id'] for host in cluster_hosts]
+        cluster_info = util.ActionHelper.get_cluster_info(cluster_id, user)
+        adapter_id = cluster_info[const.ADAPTER_ID]
+
+        adapter_info = util.ActionHelper.get_adapter_info(
+            adapter_id, cluster_id, user)
+        hosts_info = util.ActionHelper.get_hosts_info(
+            cluster_id, hosts_id_list, user)
+        patch_successful = True
+        try:
+            patcher = Patcher(
+                adapter_info, cluster_info, hosts_info, cluster_hosts)
+            patched_config = patcher.patch()
+        except Exception as error:
+            logging.exception(error)
+            patch_successful = False
+
+        if patch_successful:
+            clean_payload = '{"patched_roles": []}'
+            clean_payload = json.loads(clean_payload)
+            for cluster_host in cluster_hosts:
+                cluster_db.update_cluster_host(
+                    cluster_id, cluster_host['id'], user, **clean_payload)
+                logging.info(
+                    "cleaning up patched roles for host id: %s",
+                    cluster_host['id']
+                )
+            logging.info("Patch successful: %s", patched_config)