91 lines
3.1 KiB
Python
91 lines
3.1 KiB
Python
import configparser
|
|
import logging
|
|
import sys
|
|
import os
|
|
|
|
from ucloud.common.etcd_wrapper import Etcd3Wrapper
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class CustomConfigParser(configparser.RawConfigParser):
|
|
def __getitem__(self, key):
|
|
try:
|
|
result = super().__getitem__(key)
|
|
except KeyError as err:
|
|
raise KeyError(
|
|
'Key \'{}\' not found in configuration. Make sure you configure ucloud.'.format(key)
|
|
) from err
|
|
else:
|
|
return result
|
|
|
|
|
|
class Settings(object):
|
|
def __init__(self, config_key='/uncloud/config/'):
|
|
conf_name = 'ucloud.conf'
|
|
conf_dir = os.environ.get('UCLOUD_CONF_DIR', os.path.expanduser('~/ucloud/'))
|
|
self.config_file = os.path.join(conf_dir, conf_name)
|
|
|
|
self.config_parser = CustomConfigParser(allow_no_value=True)
|
|
self.config_key = config_key
|
|
|
|
self.read_internal_values()
|
|
try:
|
|
self.config_parser.read(self.config_file)
|
|
except Exception as err:
|
|
logger.error('%s', err)
|
|
|
|
def get_etcd_client(self):
|
|
args = tuple()
|
|
try:
|
|
kwargs = {
|
|
'host': self.config_parser.get('etcd', 'url'),
|
|
'port': self.config_parser.get('etcd', 'port'),
|
|
'ca_cert': self.config_parser.get('etcd', 'ca_cert'),
|
|
'cert_cert': self.config_parser.get('etcd', 'cert_cert'),
|
|
'cert_key': self.config_parser.get('etcd', 'cert_key')
|
|
}
|
|
except configparser.Error as err:
|
|
raise configparser.Error('{} in config file {}'.format(err.message, self.config_file)) from err
|
|
|
|
return Etcd3Wrapper(*args, **kwargs)
|
|
|
|
def read_internal_values(self):
|
|
self.config_parser.read_dict({
|
|
'etcd': {
|
|
'file_prefix': '/files/',
|
|
'host_prefix': '/hosts/',
|
|
'image_prefix': '/images/',
|
|
'image_store_prefix': '/imagestore/',
|
|
'network_prefix': '/networks/',
|
|
'request_prefix': '/requests/',
|
|
'user_prefix': '/users/',
|
|
'vm_prefix': '/vms/',
|
|
}
|
|
})
|
|
|
|
def read_config_file_values(self, config_file):
|
|
try:
|
|
# Trying to read configuration file
|
|
with open(config_file, "r") as config_file_handle:
|
|
self.config_parser.read_file(config_file_handle)
|
|
except FileNotFoundError:
|
|
sys.exit('Configuration file {} not found!'.format(config_file))
|
|
except Exception as err:
|
|
logger.exception(err)
|
|
sys.exit("Error occurred while reading configuration file")
|
|
|
|
def read_values_from_etcd(self):
|
|
etcd_client = self.get_etcd_client()
|
|
config_from_etcd = etcd_client.get(self.config_key, value_in_json=True)
|
|
if config_from_etcd:
|
|
self.config_parser.read_dict(config_from_etcd.value)
|
|
else:
|
|
raise KeyError("Key '{}' not found in etcd. Please configure ucloud.".format(self.config_key))
|
|
|
|
def __getitem__(self, key):
|
|
self.read_values_from_etcd()
|
|
return self.config_parser[key]
|
|
|
|
|
|
settings = Settings()
|