76 lines
2.3 KiB
Python
76 lines
2.3 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2014-2015 Canonical Limited.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import yaml
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from subprocess import check_call, CalledProcessError
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from charmhelpers.core.hookenv import (
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log,
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DEBUG,
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ERROR,
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WARNING,
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)
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from charmhelpers.core.host import is_container
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__author__ = 'Jorge Niedbalski R. <jorge.niedbalski@canonical.com>'
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def create(sysctl_dict, sysctl_file, ignore=False):
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"""Creates a sysctl.conf file from a YAML associative array
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:param sysctl_dict: a dict or YAML-formatted string of sysctl
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options eg "{ 'kernel.max_pid': 1337 }"
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:type sysctl_dict: str
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:param sysctl_file: path to the sysctl file to be saved
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:type sysctl_file: str or unicode
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:param ignore: If True, ignore "unknown variable" errors.
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:type ignore: bool
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:returns: None
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"""
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if type(sysctl_dict) is not dict:
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try:
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sysctl_dict_parsed = yaml.safe_load(sysctl_dict)
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except yaml.YAMLError:
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log("Error parsing YAML sysctl_dict: {}".format(sysctl_dict),
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level=ERROR)
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return
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else:
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sysctl_dict_parsed = sysctl_dict
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with open(sysctl_file, "w") as fd:
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for key, value in sysctl_dict_parsed.items():
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fd.write("{}={}\n".format(key, value))
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log("Updating sysctl_file: {} values: {}".format(sysctl_file,
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sysctl_dict_parsed),
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level=DEBUG)
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call = ["sysctl", "-p", sysctl_file]
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if ignore:
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call.append("-e")
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try:
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check_call(call)
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except CalledProcessError as e:
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if is_container():
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log("Error setting some sysctl keys in this container: {}".format(e.output),
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level=WARNING)
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else:
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raise e
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