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import logging
import os
import structlog
import traceback
import warnings
import yaml
from flask import make_response
from tzlocal import get_localzone
from importlib import import_module
from structlog.processors import (format_exc_info, JSONRenderer,
KeyValueRenderer)
from .middleware import CORS, TrailingSlash
from .search import IndexSearcher
from .storage import Store
from . import DEBUG
try:
from logging.config import dictConfig
except ImportError:
from logutils.dictconfig import dictConfig
if DEBUG:
processors = (format_exc_info, KeyValueRenderer())
else:
processors = (format_exc_info, JSONRenderer())
logger = structlog.get_logger()
default_conf = {
'search_index': '/srv/graphite/index',
'finders': [
'graphite_api.finders.whisper.WhisperFinder',
],
'functions': [
'graphite_api.functions.SeriesFunctions',
'graphite_api.functions.PieFunctions',
],
'whisper': {
'directories': [
'/srv/graphite/whisper',
],
},
'time_zone': get_localzone().zone,
}
if default_conf['time_zone'] == 'local': # tzlocal didn't find anything
default_conf['time_zone'] = 'UTC'
# attributes of a classical log record
NON_EXTRA = set(['module', 'filename', 'levelno', 'exc_text', 'pathname',
'lineno', 'msg', 'funcName', 'relativeCreated',
'levelname', 'msecs', 'threadName', 'name', 'created',
'process', 'processName', 'thread'])
class StructlogFormatter(logging.Formatter):
def __init__(self, *args, **kwargs):
self._bound = structlog.BoundLoggerBase(None, processors, {})
def format(self, record):
if not record.name.startswith('graphite_api'):
kw = dict(((k, v) for k, v in record.__dict__.items()
if k not in NON_EXTRA))
kw['logger'] = record.name
return self._bound._process_event(
record.levelname.lower(), record.getMessage(), kw)[0]
return record.getMessage()
def load_by_path(path):
module, klass = path.rsplit('.', 1)
finder = import_module(module)
return getattr(finder, klass)
def error_handler(e):
return make_response(traceback.format_exc(), 500,
{'Content-Type': 'text/plain'})
def configure(app):
config_file = os.environ.get('GRAPHITE_API_CONFIG',
'/etc/graphite-api.yaml')
if os.path.exists(config_file):
with open(config_file) as f:
config = yaml.safe_load(f)
config['path'] = config_file
else:
warnings.warn("Unable to find configuration file at {0}, using "
"default config.".format(config_file))
config = {}
configure_logging(config)
for key, value in list(default_conf.items()):
config.setdefault(key, value)
app.statsd = None
if 'statsd' in config:
try:
from statsd import StatsClient
except ImportError:
warnings.warn("'statsd' is provided in the configuration but "
"the statsd client is not installed. Please `pip "
"install statsd`.")
else:
c = config['statsd']
app.statsd = StatsClient(c['host'], c.get('port', 8125))
app.cache = None
if 'cache' in config:
try:
from flask.ext.cache import Cache
except ImportError:
warnings.warn("'cache' is provided in the configuration but "
"Flask-Cache is not installed. Please `pip install "
"Flask-Cache`.")
else:
cache_conf = {'CACHE_DEFAULT_TIMEOUT': 60,
'CACHE_KEY_PREFIX': 'graphite-api:'}
for key, value in config['cache'].items():
cache_conf['CACHE_{0}'.format(key.upper())] = value
app.cache = Cache(app, config=cache_conf)
loaded_config = {'functions': {}}
for functions in config['functions']:
loaded_config['functions'].update(load_by_path(functions))
if 'carbon' in config:
if 'hashing_keyfunc' in config['carbon']:
config['carbon']['hashing_keyfunc'] = load_by_path(
config['carbon']['hashing_keyfunc'])
else:
config['carbon']['hashing_keyfunc'] = lambda x: x
loaded_config['carbon'] = config.get('carbon', None)
finders = []
for finder in config['finders']:
finders.append(load_by_path(finder)(config))
loaded_config['store'] = Store(finders)
loaded_config['searcher'] = IndexSearcher(config['search_index'])
app.config['GRAPHITE'] = loaded_config
app.config['TIME_ZONE'] = config['time_zone']
logger.info("configured timezone", timezone=app.config['TIME_ZONE'])
if 'sentry_dsn' in config:
try:
from raven.contrib.flask import Sentry
except ImportError:
warnings.warn("'sentry_dsn' is provided in the configuration but "
"the sentry client is not installed. Please `pip "
"install raven[flask]`.")
else:
Sentry(app, dsn=config['sentry_dsn'])
app.wsgi_app = TrailingSlash(CORS(app.wsgi_app,
config.get('allowed_origins')))
if config.get('render_errors', True):
app.errorhandler(500)(error_handler)
def configure_logging(config):
structlog.configure(processors=processors,
logger_factory=structlog.stdlib.LoggerFactory(),
wrapper_class=structlog.stdlib.BoundLogger,
cache_logger_on_first_use=True)
config.setdefault('logging', {})
config['logging'].setdefault('version', 1)
config['logging'].setdefault('handlers', {})
config['logging'].setdefault('formatters', {})
config['logging'].setdefault('loggers', {})
config['logging']['handlers'].setdefault('raw', {
'level': 'DEBUG',
'class': 'logging.StreamHandler',
'formatter': 'raw',
})
config['logging']['loggers'].setdefault('root', {
'handlers': ['raw'],
'level': 'DEBUG',
'propagate': False,
})
config['logging']['loggers'].setdefault('graphite_api', {
'handlers': ['raw'],
'level': 'DEBUG',
})
config['logging']['formatters']['raw'] = {'()': StructlogFormatter}
dictConfig(config['logging'])
if 'path' in config:
logger.info("loading configuration", path=config['path'])
else:
logger.info("loading default configuration")
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