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-rw-r--r--contrail-controller/hooks/charmhelpers/core/sysctl.py54
1 files changed, 54 insertions, 0 deletions
diff --git a/contrail-controller/hooks/charmhelpers/core/sysctl.py b/contrail-controller/hooks/charmhelpers/core/sysctl.py
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+++ b/contrail-controller/hooks/charmhelpers/core/sysctl.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright 2014-2015 Canonical Limited.
+#
+# 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.
+
+import yaml
+
+from subprocess import check_call
+
+from charmhelpers.core.hookenv import (
+ log,
+ DEBUG,
+ ERROR,
+)
+
+__author__ = 'Jorge Niedbalski R. <jorge.niedbalski@canonical.com>'
+
+
+def create(sysctl_dict, sysctl_file):
+ """Creates a sysctl.conf file from a YAML associative array
+
+ :param sysctl_dict: a YAML-formatted string of sysctl options eg "{ 'kernel.max_pid': 1337 }"
+ :type sysctl_dict: str
+ :param sysctl_file: path to the sysctl file to be saved
+ :type sysctl_file: str or unicode
+ :returns: None
+ """
+ try:
+ sysctl_dict_parsed = yaml.safe_load(sysctl_dict)
+ except yaml.YAMLError:
+ log("Error parsing YAML sysctl_dict: {}".format(sysctl_dict),
+ level=ERROR)
+ return
+
+ with open(sysctl_file, "w") as fd:
+ for key, value in sysctl_dict_parsed.items():
+ fd.write("{}={}\n".format(key, value))
+
+ log("Updating sysctl_file: %s values: %s" % (sysctl_file, sysctl_dict_parsed),
+ level=DEBUG)
+
+ check_call(["sysctl", "-p", sysctl_file])