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import logging
import yaml
import os
import time
import re
import ssl
import traceback
import threading
from tempfile import NamedTemporaryFile, _TemporaryFileWrapper
from urllib.error import HTTPError, URLError
from urllib.request import urlopen, Request
from typing import Dict, Callable, Any, Optional, MutableMapping, Tuple, Union
CONFIG: Dict[str, Any] = {
'reporter': {
'check_interval': 5,
'push_data_max_retries': 30,
'endpoint': 'https://%(mgr_host):%(mgr_port)/node-proxy/data',
},
'system': {
'refresh_interval': 5
},
'api': {
'port': 9456,
},
'logging': {
'level': logging.INFO,
}
}
def get_logger(name: str, level: Union[int, str] = logging.NOTSET) -> logging.Logger:
if level == logging.NOTSET:
log_level = CONFIG['logging']['level']
logger = logging.getLogger(name)
logger.setLevel(log_level)
handler = logging.StreamHandler()
handler.setLevel(log_level)
fmt = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(fmt)
logger.handlers.clear()
logger.addHandler(handler)
logger.propagate = False
return logger
logger = get_logger(__name__)
class Config:
def __init__(self,
config_file: str = '/etc/ceph/node-proxy.yaml',
config: Dict[str, Any] = {}) -> None:
self.config_file = config_file
self.config = config
self.load_config()
def load_config(self) -> None:
if os.path.exists(self.config_file):
with open(self.config_file, 'r') as f:
self.config = yaml.safe_load(f)
else:
self.config = self.config
for k, v in self.config.items():
if k not in self.config.keys():
self.config[k] = v
for k, v in self.config.items():
setattr(self, k, v)
def reload(self, config_file: str = '') -> None:
if config_file != '':
self.config_file = config_file
self.load_config()
class BaseThread(threading.Thread):
def __init__(self) -> None:
super().__init__()
self.exc: Optional[Exception] = None
self.stop: bool = False
self.daemon = True
self.name = self.__class__.__name__
self.log: logging.Logger = get_logger(__name__)
self.pending_shutdown: bool = False
def run(self) -> None:
logger.info(f'Starting {self.name}')
try:
self.main()
except Exception as e:
self.exc = e
return
def shutdown(self) -> None:
self.stop = True
self.pending_shutdown = True
def check_status(self) -> bool:
logger.debug(f'Checking status of {self.name}')
if self.exc:
traceback.print_tb(self.exc.__traceback__)
logger.error(f'Caught exception: {self.exc.__class__.__name__}')
raise self.exc
if not self.is_alive():
logger.info(f'{self.name} not alive')
self.start()
return True
def main(self) -> None:
raise NotImplementedError()
def to_snake_case(name: str) -> str:
name = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
return re.sub('([a-z0-9])([A-Z])', r'\1_\2', name).lower()
def normalize_dict(test_dict: Dict) -> Dict:
res = dict()
for key in test_dict.keys():
if isinstance(test_dict[key], dict):
res[key.lower()] = normalize_dict(test_dict[key])
else:
if test_dict[key] is None:
test_dict[key] = 'unknown'
res[key.lower()] = test_dict[key]
return res
def retry(exceptions: Any = Exception, retries: int = 20, delay: int = 1) -> Callable:
def decorator(f: Callable) -> Callable:
def _retry(*args: str, **kwargs: Any) -> Callable:
_tries = retries
while _tries > 1:
try:
logger.debug('{} {} attempt(s) left.'.format(f, _tries - 1))
return f(*args, **kwargs)
except exceptions:
time.sleep(delay)
_tries -= 1
logger.warn('{} has failed after {} tries'.format(f, retries))
return f(*args, **kwargs)
return _retry
return decorator
def http_req(hostname: str = '',
port: str = '443',
method: Optional[str] = None,
headers: MutableMapping[str, str] = {},
data: Optional[str] = None,
endpoint: str = '/',
scheme: str = 'https',
ssl_verify: bool = False,
timeout: Optional[int] = None,
ssl_ctx: Optional[Any] = None) -> Tuple[Any, Any, Any]:
if not ssl_ctx:
ssl_ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
if not ssl_verify:
ssl_ctx.check_hostname = False
ssl_ctx.verify_mode = ssl.CERT_NONE
else:
ssl_ctx.verify_mode = ssl.CERT_REQUIRED
url: str = f'{scheme}://{hostname}:{port}{endpoint}'
_data = bytes(data, 'ascii') if data else None
_headers = headers
if data and not method:
method = 'POST'
if not _headers.get('Content-Type') and method in ['POST', 'PATCH']:
_headers['Content-Type'] = 'application/json'
try:
req = Request(url, _data, _headers, method=method)
with urlopen(req, context=ssl_ctx, timeout=timeout) as response:
response_str = response.read()
response_headers = response.headers
response_code = response.code
return response_headers, response_str.decode(), response_code
except (HTTPError, URLError) as e:
print(f'{e}')
# handle error here if needed
raise
def write_tmp_file(data: str, prefix_name: str = 'node-proxy-') -> _TemporaryFileWrapper:
f = NamedTemporaryFile(prefix=prefix_name)
os.fchmod(f.fileno(), 0o600)
f.write(data.encode('utf-8'))
f.flush()
return f
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