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# Microsoft Azure Linux Agent
#
# Copyright 2014 Microsoft Corporation
#
# 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.
#
# Requires Python 2.4+ and Openssl 1.0+
#
"""
Module conf loads and parses configuration file
"""
import os
import azurelinuxagent.utils.fileutil as fileutil
from azurelinuxagent.exception import AgentConfigError
class ConfigurationProvider(object):
"""
Parse amd store key:values in /etc/waagent.conf.
"""
def __init__(self):
self.values = dict()
def load(self, content):
if not content:
raise AgentConfigError("Can't not parse empty configuration")
for line in content.split('\n'):
if not line.startswith("#") and "=" in line:
parts = line.split()[0].split('=')
value = parts[1].strip("\" ")
if value != "None":
self.values[parts[0]] = value
else:
self.values[parts[0]] = None
def get(self, key, default_val=None):
val = self.values.get(key)
return val if val is not None else default_val
def get_switch(self, key, default_val=False):
val = self.values.get(key)
if val is not None and val.lower() == 'y':
return True
elif val is not None and val.lower() == 'n':
return False
return default_val
def get_int(self, key, default_val=-1):
try:
return int(self.values.get(key))
except TypeError:
return default_val
except ValueError:
return default_val
__config__ = ConfigurationProvider()
def load_conf(conf_file_path, conf=__config__):
"""
Load conf file from: conf_file_path
"""
if os.path.isfile(conf_file_path) == False:
raise AgentConfigError(("Missing configuration in {0}"
"").format(conf_file_path))
try:
content = fileutil.read_file(conf_file_path)
conf.load(content)
except IOError as err:
raise AgentConfigError(("Failed to load conf file:{0}, {1}"
"").format(conf_file_path, err))
def get(key, default_val=None, conf=__config__):
"""
Get option value by key, return default_val if not found
"""
if conf is not None:
return conf.get(key, default_val)
else:
return default_val
def get_switch(key, default_val=None, conf=__config__):
"""
Get bool option value by key, return default_val if not found
"""
if conf is not None:
return conf.get_switch(key, default_val)
else:
return default_val
def get_int(key, default_val=None, conf=__config__):
"""
Get int option value by key, return default_val if not found
"""
if conf is not None:
return conf.get_int(key, default_val)
else:
return default_val
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