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configuration.py
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configuration.py
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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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.
import datetime
import functools
import json
import logging
import multiprocessing
import os
import pathlib
import re
import shlex
import subprocess
import sys
import warnings
from base64 import b64encode
from collections import OrderedDict
# Ignored Mypy on configparser because it thinks the configparser module has no _UNSET attribute
from configparser import _UNSET, ConfigParser, NoOptionError, NoSectionError # type: ignore
from contextlib import suppress
from json.decoder import JSONDecodeError
from re import Pattern
from typing import IO, Any, Dict, Iterable, List, Optional, Set, Tuple, Union
from urllib.parse import urlparse
from typing_extensions import overload
from airflow.exceptions import AirflowConfigException
from airflow.secrets import DEFAULT_SECRETS_SEARCH_PATH, BaseSecretsBackend
from airflow.utils import yaml
from airflow.utils.module_loading import import_string
from airflow.utils.weight_rule import WeightRule
log = logging.getLogger(__name__)
# show Airflow's deprecation warnings
if not sys.warnoptions:
warnings.filterwarnings(action='default', category=DeprecationWarning, module='airflow')
warnings.filterwarnings(action='default', category=PendingDeprecationWarning, module='airflow')
_SQLITE3_VERSION_PATTERN = re.compile(r"(?P<version>^\d+(?:\.\d+)*)\D?.*$")
ConfigType = Union[str, int, float, bool]
ConfigOptionsDictType = Dict[str, ConfigType]
ConfigSectionSourcesType = Dict[str, Union[str, Tuple[str, str]]]
ConfigSourcesType = Dict[str, ConfigSectionSourcesType]
ENV_VAR_PREFIX = 'AIRFLOW__'
def _parse_sqlite_version(s: str) -> Tuple[int, ...]:
match = _SQLITE3_VERSION_PATTERN.match(s)
if match is None:
return ()
return tuple(int(p) for p in match.group("version").split("."))
@overload
def expand_env_var(env_var: None) -> None:
...
@overload
def expand_env_var(env_var: str) -> str:
...
def expand_env_var(env_var: Union[str, None]) -> Optional[Union[str, None]]:
"""
Expands (potentially nested) env vars by repeatedly applying
`expandvars` and `expanduser` until interpolation stops having
any effect.
"""
if not env_var:
return env_var
while True:
interpolated = os.path.expanduser(os.path.expandvars(str(env_var)))
if interpolated == env_var:
return interpolated
else:
env_var = interpolated
def run_command(command: str) -> str:
"""Runs command and returns stdout"""
process = subprocess.Popen(
shlex.split(command), stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True
)
output, stderr = (stream.decode(sys.getdefaultencoding(), 'ignore') for stream in process.communicate())
if process.returncode != 0:
raise AirflowConfigException(
f"Cannot execute {command}. Error code is: {process.returncode}. "
f"Output: {output}, Stderr: {stderr}"
)
return output
def _get_config_value_from_secret_backend(config_key: str) -> Optional[str]:
"""Get Config option values from Secret Backend"""
try:
secrets_client = get_custom_secret_backend()
if not secrets_client:
return None
return secrets_client.get_config(config_key)
except Exception as e:
raise AirflowConfigException(
'Cannot retrieve config from alternative secrets backend. '
'Make sure it is configured properly and that the Backend '
'is accessible.\n'
f'{e}'
)
def _default_config_file_path(file_name: str) -> str:
templates_dir = os.path.join(os.path.dirname(__file__), 'config_templates')
return os.path.join(templates_dir, file_name)
def default_config_yaml() -> List[Dict[str, Any]]:
"""
Read Airflow configs from YAML file
:return: Python dictionary containing configs & their info
"""
with open(_default_config_file_path('config.yml')) as config_file:
return yaml.safe_load(config_file)
SENSITIVE_CONFIG_VALUES = {
('database', 'sql_alchemy_conn'),
('core', 'fernet_key'),
('celery', 'broker_url'),
('celery', 'flower_basic_auth'),
('celery', 'result_backend'),
('atlas', 'password'),
('smtp', 'smtp_password'),
('webserver', 'secret_key'),
# The following options are deprecated
('core', 'sql_alchemy_conn'),
}
class AirflowConfigParser(ConfigParser):
"""Custom Airflow Configparser supporting defaults and deprecated options"""
# These configuration elements can be fetched as the stdout of commands
# following the "{section}__{name}_cmd" pattern, the idea behind this
# is to not store password on boxes in text files.
# These configs can also be fetched from Secrets backend
# following the "{section}__{name}__secret" pattern
sensitive_config_values: Set[Tuple[str, str]] = SENSITIVE_CONFIG_VALUES
# A mapping of (new section, new option) -> (old section, old option, since_version).
# When reading new option, the old option will be checked to see if it exists. If it does a
# DeprecationWarning will be issued and the old option will be used instead
deprecated_options: Dict[Tuple[str, str], Tuple[str, str, str]] = {
('celery', 'worker_precheck'): ('core', 'worker_precheck', '2.0.0'),
('logging', 'base_log_folder'): ('core', 'base_log_folder', '2.0.0'),
('logging', 'remote_logging'): ('core', 'remote_logging', '2.0.0'),
('logging', 'remote_log_conn_id'): ('core', 'remote_log_conn_id', '2.0.0'),
('logging', 'remote_base_log_folder'): ('core', 'remote_base_log_folder', '2.0.0'),
('logging', 'encrypt_s3_logs'): ('core', 'encrypt_s3_logs', '2.0.0'),
('logging', 'logging_level'): ('core', 'logging_level', '2.0.0'),
('logging', 'fab_logging_level'): ('core', 'fab_logging_level', '2.0.0'),
('logging', 'logging_config_class'): ('core', 'logging_config_class', '2.0.0'),
('logging', 'colored_console_log'): ('core', 'colored_console_log', '2.0.0'),
('logging', 'colored_log_format'): ('core', 'colored_log_format', '2.0.0'),
('logging', 'colored_formatter_class'): ('core', 'colored_formatter_class', '2.0.0'),
('logging', 'log_format'): ('core', 'log_format', '2.0.0'),
('logging', 'simple_log_format'): ('core', 'simple_log_format', '2.0.0'),
('logging', 'task_log_prefix_template'): ('core', 'task_log_prefix_template', '2.0.0'),
('logging', 'log_filename_template'): ('core', 'log_filename_template', '2.0.0'),
('logging', 'log_processor_filename_template'): ('core', 'log_processor_filename_template', '2.0.0'),
('logging', 'dag_processor_manager_log_location'): (
'core',
'dag_processor_manager_log_location',
'2.0.0',
),
('logging', 'task_log_reader'): ('core', 'task_log_reader', '2.0.0'),
('metrics', 'statsd_on'): ('scheduler', 'statsd_on', '2.0.0'),
('metrics', 'statsd_host'): ('scheduler', 'statsd_host', '2.0.0'),
('metrics', 'statsd_port'): ('scheduler', 'statsd_port', '2.0.0'),
('metrics', 'statsd_prefix'): ('scheduler', 'statsd_prefix', '2.0.0'),
('metrics', 'statsd_allow_list'): ('scheduler', 'statsd_allow_list', '2.0.0'),
('metrics', 'stat_name_handler'): ('scheduler', 'stat_name_handler', '2.0.0'),
('metrics', 'statsd_datadog_enabled'): ('scheduler', 'statsd_datadog_enabled', '2.0.0'),
('metrics', 'statsd_datadog_tags'): ('scheduler', 'statsd_datadog_tags', '2.0.0'),
('metrics', 'statsd_custom_client_path'): ('scheduler', 'statsd_custom_client_path', '2.0.0'),
('scheduler', 'parsing_processes'): ('scheduler', 'max_threads', '1.10.14'),
('scheduler', 'scheduler_idle_sleep_time'): ('scheduler', 'processor_poll_interval', '2.2.0'),
('operators', 'default_queue'): ('celery', 'default_queue', '2.1.0'),
('core', 'hide_sensitive_var_conn_fields'): ('admin', 'hide_sensitive_variable_fields', '2.1.0'),
('core', 'sensitive_var_conn_names'): ('admin', 'sensitive_variable_fields', '2.1.0'),
('core', 'default_pool_task_slot_count'): ('core', 'non_pooled_task_slot_count', '1.10.4'),
('core', 'max_active_tasks_per_dag'): ('core', 'dag_concurrency', '2.2.0'),
('logging', 'worker_log_server_port'): ('celery', 'worker_log_server_port', '2.2.0'),
('api', 'access_control_allow_origins'): ('api', 'access_control_allow_origin', '2.2.0'),
('api', 'auth_backends'): ('api', 'auth_backend', '2.3.0'),
('database', 'sql_alchemy_conn'): ('core', 'sql_alchemy_conn', '2.3.0'),
('database', 'sql_engine_encoding'): ('core', 'sql_engine_encoding', '2.3.0'),
('database', 'sql_engine_collation_for_ids'): ('core', 'sql_engine_collation_for_ids', '2.3.0'),
('database', 'sql_alchemy_pool_enabled'): ('core', 'sql_alchemy_pool_enabled', '2.3.0'),
('database', 'sql_alchemy_pool_size'): ('core', 'sql_alchemy_pool_size', '2.3.0'),
('database', 'sql_alchemy_max_overflow'): ('core', 'sql_alchemy_max_overflow', '2.3.0'),
('database', 'sql_alchemy_pool_recycle'): ('core', 'sql_alchemy_pool_recycle', '2.3.0'),
('database', 'sql_alchemy_pool_pre_ping'): ('core', 'sql_alchemy_pool_pre_ping', '2.3.0'),
('database', 'sql_alchemy_schema'): ('core', 'sql_alchemy_schema', '2.3.0'),
('database', 'sql_alchemy_connect_args'): ('core', 'sql_alchemy_connect_args', '2.3.0'),
('database', 'load_default_connections'): ('core', 'load_default_connections', '2.3.0'),
('database', 'max_db_retries'): ('core', 'max_db_retries', '2.3.0'),
}
# A mapping of old default values that we want to change and warn the user
# about. Mapping of section -> setting -> { old, replace, by_version }
deprecated_values: Dict[str, Dict[str, Tuple[Pattern, str, str]]] = {
'core': {
'hostname_callable': (re.compile(r':'), r'.', '2.1'),
},
'webserver': {
'navbar_color': (re.compile(r'\A#007A87\Z', re.IGNORECASE), '#fff', '2.1'),
'dag_default_view': (re.compile(r'^tree$'), 'grid', '3.0'),
},
'email': {
'email_backend': (
re.compile(r'^airflow\.contrib\.utils\.sendgrid\.send_email$'),
r'airflow.providers.sendgrid.utils.emailer.send_email',
'2.1',
),
},
'logging': {
'log_filename_template': (
re.compile(re.escape("{{ ti.dag_id }}/{{ ti.task_id }}/{{ ts }}/{{ try_number }}.log")),
"XX-set-after-default-config-loaded-XX",
'3.0',
),
},
'api': {
'auth_backends': (
re.compile(r'^airflow\.api\.auth\.backend\.deny_all$|^$'),
'airflow.api.auth.backend.session',
'3.0',
),
},
'elasticsearch': {
'log_id_template': (
re.compile('^' + re.escape('{dag_id}-{task_id}-{execution_date}-{try_number}') + '$'),
'{dag_id}-{task_id}-{run_id}-{map_index}-{try_number}',
'3.0',
)
},
}
_available_logging_levels = ['CRITICAL', 'FATAL', 'ERROR', 'WARN', 'WARNING', 'INFO', 'DEBUG']
enums_options = {
("core", "default_task_weight_rule"): sorted(WeightRule.all_weight_rules()),
("core", "dag_ignore_file_syntax"): ["regexp", "glob"],
('core', 'mp_start_method'): multiprocessing.get_all_start_methods(),
("scheduler", "file_parsing_sort_mode"): ["modified_time", "random_seeded_by_host", "alphabetical"],
("logging", "logging_level"): _available_logging_levels,
("logging", "fab_logging_level"): _available_logging_levels,
# celery_logging_level can be empty, which uses logging_level as fallback
("logging", "celery_logging_level"): _available_logging_levels + [''],
("webserver", "analytical_tool"): ['google_analytics', 'metarouter', 'segment', ''],
}
upgraded_values: Dict[Tuple[str, str], str]
"""Mapping of (section,option) to the old value that was upgraded"""
# This method transforms option names on every read, get, or set operation.
# This changes from the default behaviour of ConfigParser from lower-casing
# to instead be case-preserving
def optionxform(self, optionstr: str) -> str:
return optionstr
def __init__(self, default_config: Optional[str] = None, *args, **kwargs):
super().__init__(*args, **kwargs)
self.upgraded_values = {}
self.airflow_defaults = ConfigParser(*args, **kwargs)
if default_config is not None:
self.airflow_defaults.read_string(default_config)
# Set the upgrade value based on the current loaded default
default = self.airflow_defaults.get('logging', 'log_filename_template', fallback=None)
if default:
replacement = self.deprecated_values['logging']['log_filename_template']
self.deprecated_values['logging']['log_filename_template'] = (
replacement[0],
default,
replacement[2],
)
else:
# In case of tests it might not exist
with suppress(KeyError):
del self.deprecated_values['logging']['log_filename_template']
else:
with suppress(KeyError):
del self.deprecated_values['logging']['log_filename_template']
self.is_validated = False
def validate(self):
self._validate_config_dependencies()
self._validate_enums()
for section, replacement in self.deprecated_values.items():
for name, info in replacement.items():
old, new, version = info
current_value = self.get(section, name, fallback="")
if self._using_old_value(old, current_value):
self.upgraded_values[(section, name)] = current_value
new_value = old.sub(new, current_value)
self._update_env_var(section=section, name=name, new_value=new_value)
self._create_future_warning(
name=name,
section=section,
current_value=current_value,
new_value=new_value,
version=version,
)
self._upgrade_auth_backends()
self._upgrade_postgres_metastore_conn()
self.is_validated = True
def _upgrade_auth_backends(self):
"""
Ensure a custom auth_backends setting contains session,
which is needed by the UI for ajax queries.
"""
old_value = self.get("api", "auth_backends", fallback="")
if old_value in ('airflow.api.auth.backend.default', ''):
# handled by deprecated_values
pass
elif old_value.find('airflow.api.auth.backend.session') == -1:
new_value = old_value + ",airflow.api.auth.backend.session"
self._update_env_var(section="api", name="auth_backends", new_value=new_value)
self.upgraded_values[("api", "auth_backends")] = old_value
# if the old value is set via env var, we need to wipe it
# otherwise, it'll "win" over our adjusted value
old_env_var = self._env_var_name("api", "auth_backend")
os.environ.pop(old_env_var, None)
warnings.warn(
'The auth_backends setting in [api] has had airflow.api.auth.backend.session added '
'in the running config, which is needed by the UI. Please update your config before '
'Apache Airflow 3.0.',
FutureWarning,
)
def _upgrade_postgres_metastore_conn(self):
"""
As of SQLAlchemy 1.4, schemes `postgres+psycopg2` and `postgres`
must be replaced with `postgresql`.
"""
section, key = 'database', 'sql_alchemy_conn'
old_value = self.get(section, key)
bad_schemes = ['postgres+psycopg2', 'postgres']
good_scheme = 'postgresql'
parsed = urlparse(old_value)
if parsed.scheme in bad_schemes:
warnings.warn(
f"Bad scheme in Airflow configuration core > sql_alchemy_conn: `{parsed.scheme}`. "
"As of SQLAlchemy 1.4 (adopted in Airflow 2.3) this is no longer supported. You must "
f"change to `{good_scheme}` before the next Airflow release.",
FutureWarning,
)
self.upgraded_values[(section, key)] = old_value
new_value = re.sub('^' + re.escape(f"{parsed.scheme}://"), f"{good_scheme}://", old_value)
self._update_env_var(section=section, name=key, new_value=new_value)
# if the old value is set via env var, we need to wipe it
# otherwise, it'll "win" over our adjusted value
old_env_var = self._env_var_name("core", key)
os.environ.pop(old_env_var, None)
def _validate_enums(self):
"""Validate that enum type config has an accepted value"""
for (section_key, option_key), enum_options in self.enums_options.items():
if self.has_option(section_key, option_key):
value = self.get(section_key, option_key)
if value not in enum_options:
raise AirflowConfigException(
f"`[{section_key}] {option_key}` should not be "
f"{value!r}. Possible values: {', '.join(enum_options)}."
)
def _validate_config_dependencies(self):
"""
Validate that config values aren't invalid given other config values
or system-level limitations and requirements.
"""
is_executor_without_sqlite_support = self.get("core", "executor") not in (
'DebugExecutor',
'SequentialExecutor',
)
is_sqlite = "sqlite" in self.get('database', 'sql_alchemy_conn')
if is_sqlite and is_executor_without_sqlite_support:
raise AirflowConfigException(f"error: cannot use sqlite with the {self.get('core', 'executor')}")
if is_sqlite:
import sqlite3
from airflow.utils.docs import get_docs_url
# Some features in storing rendered fields require sqlite version >= 3.15.0
min_sqlite_version = (3, 15, 0)
if _parse_sqlite_version(sqlite3.sqlite_version) < min_sqlite_version:
min_sqlite_version_str = ".".join(str(s) for s in min_sqlite_version)
raise AirflowConfigException(
f"error: sqlite C library version too old (< {min_sqlite_version_str}). "
f"See {get_docs_url('howto/set-up-database.html#setting-up-a-sqlite-database')}"
)
def _using_old_value(self, old: Pattern, current_value: str) -> bool:
return old.search(current_value) is not None
def _update_env_var(self, section: str, name: str, new_value: Union[str]):
env_var = self._env_var_name(section, name)
# Set it as an env var so that any subprocesses keep the same override!
os.environ[env_var] = new_value
@staticmethod
def _create_future_warning(name: str, section: str, current_value: Any, new_value: Any, version: str):
warnings.warn(
f'The {name!r} setting in [{section}] has the old default value of {current_value!r}. '
f'This value has been changed to {new_value!r} in the running config, but '
f'please update your config before Apache Airflow {version}.',
FutureWarning,
)
def _env_var_name(self, section: str, key: str) -> str:
return f'{ENV_VAR_PREFIX}{section.upper()}__{key.upper()}'
def _get_env_var_option(self, section: str, key: str):
# must have format AIRFLOW__{SECTION}__{KEY} (note double underscore)
env_var = self._env_var_name(section, key)
if env_var in os.environ:
return expand_env_var(os.environ[env_var])
# alternatively AIRFLOW__{SECTION}__{KEY}_CMD (for a command)
env_var_cmd = env_var + '_CMD'
if env_var_cmd in os.environ:
# if this is a valid command key...
if (section, key) in self.sensitive_config_values:
return run_command(os.environ[env_var_cmd])
# alternatively AIRFLOW__{SECTION}__{KEY}_SECRET (to get from Secrets Backend)
env_var_secret_path = env_var + '_SECRET'
if env_var_secret_path in os.environ:
# if this is a valid secret path...
if (section, key) in self.sensitive_config_values:
return _get_config_value_from_secret_backend(os.environ[env_var_secret_path])
return None
def _get_cmd_option(self, section: str, key: str):
fallback_key = key + '_cmd'
if (section, key) in self.sensitive_config_values:
if super().has_option(section, fallback_key):
command = super().get(section, fallback_key)
return run_command(command)
return None
def _get_cmd_option_from_config_sources(
self, config_sources: ConfigSourcesType, section: str, key: str
) -> Optional[str]:
fallback_key = key + '_cmd'
if (section, key) in self.sensitive_config_values:
section_dict = config_sources.get(section)
if section_dict is not None:
command_value = section_dict.get(fallback_key)
if command_value is not None:
if isinstance(command_value, str):
command = command_value
else:
command = command_value[0]
return run_command(command)
return None
def _get_secret_option(self, section: str, key: str) -> Optional[str]:
"""Get Config option values from Secret Backend"""
fallback_key = key + '_secret'
if (section, key) in self.sensitive_config_values:
if super().has_option(section, fallback_key):
secrets_path = super().get(section, fallback_key)
return _get_config_value_from_secret_backend(secrets_path)
return None
def _get_secret_option_from_config_sources(
self, config_sources: ConfigSourcesType, section: str, key: str
) -> Optional[str]:
fallback_key = key + '_secret'
if (section, key) in self.sensitive_config_values:
section_dict = config_sources.get(section)
if section_dict is not None:
secrets_path_value = section_dict.get(fallback_key)
if secrets_path_value is not None:
if isinstance(secrets_path_value, str):
secrets_path = secrets_path_value
else:
secrets_path = secrets_path_value[0]
return _get_config_value_from_secret_backend(secrets_path)
return None
def get_mandatory_value(self, section: str, key: str, **kwargs) -> str:
value = self.get(section, key, **kwargs)
if value is None:
raise ValueError(f"The value {section}/{key} should be set!")
return value
def get(self, section: str, key: str, **kwargs) -> Optional[str]: # type: ignore[override]
section = str(section).lower()
key = str(key).lower()
deprecated_section, deprecated_key, _ = self.deprecated_options.get(
(section, key), (None, None, None)
)
option = self._get_environment_variables(deprecated_key, deprecated_section, key, section)
if option is not None:
return option
option = self._get_option_from_config_file(deprecated_key, deprecated_section, key, kwargs, section)
if option is not None:
return option
option = self._get_option_from_commands(deprecated_key, deprecated_section, key, section)
if option is not None:
return option
option = self._get_option_from_secrets(deprecated_key, deprecated_section, key, section)
if option is not None:
return option
return self._get_option_from_default_config(section, key, **kwargs)
def _get_option_from_default_config(self, section: str, key: str, **kwargs) -> Optional[str]:
# ...then the default config
if self.airflow_defaults.has_option(section, key) or 'fallback' in kwargs:
return expand_env_var(self.airflow_defaults.get(section, key, **kwargs))
else:
log.warning("section/key [%s/%s] not found in config", section, key)
raise AirflowConfigException(f"section/key [{section}/{key}] not found in config")
def _get_option_from_secrets(
self, deprecated_key: Optional[str], deprecated_section: Optional[str], key: str, section: str
) -> Optional[str]:
# ...then from secret backends
option = self._get_secret_option(section, key)
if option:
return option
if deprecated_section and deprecated_key:
option = self._get_secret_option(deprecated_section, deprecated_key)
if option:
self._warn_deprecate(section, key, deprecated_section, deprecated_key)
return option
return None
def _get_option_from_commands(
self, deprecated_key: Optional[str], deprecated_section: Optional[str], key: str, section: str
) -> Optional[str]:
# ...then commands
option = self._get_cmd_option(section, key)
if option:
return option
if deprecated_section and deprecated_key:
option = self._get_cmd_option(deprecated_section, deprecated_key)
if option:
self._warn_deprecate(section, key, deprecated_section, deprecated_key)
return option
return None
def _get_option_from_config_file(
self,
deprecated_key: Optional[str],
deprecated_section: Optional[str],
key: str,
kwargs: Dict[str, Any],
section: str,
) -> Optional[str]:
# ...then the config file
if super().has_option(section, key):
# Use the parent's methods to get the actual config here to be able to
# separate the config from default config.
return expand_env_var(super().get(section, key, **kwargs))
if deprecated_section and deprecated_key:
if super().has_option(deprecated_section, deprecated_key):
self._warn_deprecate(section, key, deprecated_section, deprecated_key)
return expand_env_var(super().get(deprecated_section, deprecated_key, **kwargs))
return None
def _get_environment_variables(
self, deprecated_key: Optional[str], deprecated_section: Optional[str], key: str, section: str
) -> Optional[str]:
# first check environment variables
option = self._get_env_var_option(section, key)
if option is not None:
return option
if deprecated_section and deprecated_key:
option = self._get_env_var_option(deprecated_section, deprecated_key)
if option is not None:
self._warn_deprecate(section, key, deprecated_section, deprecated_key)
return option
return None
def getboolean(self, section: str, key: str, **kwargs) -> bool: # type: ignore[override]
val = str(self.get(section, key, **kwargs)).lower().strip()
if '#' in val:
val = val.split('#')[0].strip()
if val in ('t', 'true', '1'):
return True
elif val in ('f', 'false', '0'):
return False
else:
raise AirflowConfigException(
f'Failed to convert value to bool. Please check "{key}" key in "{section}" section. '
f'Current value: "{val}".'
)
def getint(self, section: str, key: str, **kwargs) -> int: # type: ignore[override]
val = self.get(section, key, **kwargs)
if val is None:
raise AirflowConfigException(
f'Failed to convert value None to int. '
f'Please check "{key}" key in "{section}" section is set.'
)
try:
return int(val)
except ValueError:
raise AirflowConfigException(
f'Failed to convert value to int. Please check "{key}" key in "{section}" section. '
f'Current value: "{val}".'
)
def getfloat(self, section: str, key: str, **kwargs) -> float: # type: ignore[override]
val = self.get(section, key, **kwargs)
if val is None:
raise AirflowConfigException(
f'Failed to convert value None to float. '
f'Please check "{key}" key in "{section}" section is set.'
)
try:
return float(val)
except ValueError:
raise AirflowConfigException(
f'Failed to convert value to float. Please check "{key}" key in "{section}" section. '
f'Current value: "{val}".'
)
def getimport(self, section: str, key: str, **kwargs) -> Any:
"""
Reads options, imports the full qualified name, and returns the object.
In case of failure, it throws an exception with the key and section names
:return: The object or None, if the option is empty
"""
full_qualified_path = conf.get(section=section, key=key, **kwargs)
if not full_qualified_path:
return None
try:
return import_string(full_qualified_path)
except ImportError as e:
log.error(e)
raise AirflowConfigException(
f'The object could not be loaded. Please check "{key}" key in "{section}" section. '
f'Current value: "{full_qualified_path}".'
)
def getjson(
self, section: str, key: str, fallback=_UNSET, **kwargs
) -> Union[dict, list, str, int, float, None]:
"""
Return a config value parsed from a JSON string.
``fallback`` is *not* JSON parsed but used verbatim when no config value is given.
"""
# get always returns the fallback value as a string, so for this if
# someone gives us an object we want to keep that
default = _UNSET
if fallback is not _UNSET:
default = fallback
fallback = _UNSET
try:
data = self.get(section=section, key=key, fallback=fallback, **kwargs)
except (NoSectionError, NoOptionError):
return default
if not data:
return default if default is not _UNSET else None
try:
return json.loads(data)
except JSONDecodeError as e:
raise AirflowConfigException(f'Unable to parse [{section}] {key!r} as valid json') from e
def gettimedelta(
self, section: str, key: str, fallback: Any = None, **kwargs
) -> Optional[datetime.timedelta]:
"""
Gets the config value for the given section and key, and converts it into datetime.timedelta object.
If the key is missing, then it is considered as `None`.
:param section: the section from the config
:param key: the key defined in the given section
:param fallback: fallback value when no config value is given, defaults to None
:raises AirflowConfigException: raised because ValueError or OverflowError
:return: datetime.timedelta(seconds=<config_value>) or None
"""
val = self.get(section, key, fallback=fallback, **kwargs)
if val:
# the given value must be convertible to integer
try:
int_val = int(val)
except ValueError:
raise AirflowConfigException(
f'Failed to convert value to int. Please check "{key}" key in "{section}" section. '
f'Current value: "{val}".'
)
try:
return datetime.timedelta(seconds=int_val)
except OverflowError as err:
raise AirflowConfigException(
f'Failed to convert value to timedelta in `seconds`. '
f'{err}. '
f'Please check "{key}" key in "{section}" section. Current value: "{val}".'
)
return fallback
def read(
self,
filenames: Union[
str,
bytes,
os.PathLike,
Iterable[Union[str, bytes, os.PathLike]],
],
encoding=None,
):
super().read(filenames=filenames, encoding=encoding)
# The RawConfigParser defines "Mapping" from abc.collections is not subscriptable - so we have
# to use Dict here.
def read_dict( # type: ignore[override]
self, dictionary: Dict[str, Dict[str, Any]], source: str = '<dict>'
):
super().read_dict(dictionary=dictionary, source=source)
def has_option(self, section: str, option: str) -> bool:
try:
# Using self.get() to avoid reimplementing the priority order
# of config variables (env, config, cmd, defaults)
# UNSET to avoid logging a warning about missing values
self.get(section, option, fallback=_UNSET)
return True
except (NoOptionError, NoSectionError):
return False
def remove_option(self, section: str, option: str, remove_default: bool = True):
"""
Remove an option if it exists in config from a file or
default config. If both of config have the same option, this removes
the option in both configs unless remove_default=False.
"""
if super().has_option(section, option):
super().remove_option(section, option)
if self.airflow_defaults.has_option(section, option) and remove_default:
self.airflow_defaults.remove_option(section, option)
def getsection(self, section: str) -> Optional[ConfigOptionsDictType]:
"""
Returns the section as a dict. Values are converted to int, float, bool
as required.
:param section: section from the config
:rtype: dict
"""
if not self.has_section(section) and not self.airflow_defaults.has_section(section):
return None
if self.airflow_defaults.has_section(section):
_section: ConfigOptionsDictType = OrderedDict(self.airflow_defaults.items(section))
else:
_section = OrderedDict()
if self.has_section(section):
_section.update(OrderedDict(self.items(section)))
section_prefix = self._env_var_name(section, '')
for env_var in sorted(os.environ.keys()):
if env_var.startswith(section_prefix):
key = env_var.replace(section_prefix, '')
if key.endswith("_CMD"):
key = key[:-4]
key = key.lower()
_section[key] = self._get_env_var_option(section, key)
for key, val in _section.items():
if val is None:
raise AirflowConfigException(
f'Failed to convert value automatically. '
f'Please check "{key}" key in "{section}" section is set.'
)
try:
_section[key] = int(val)
except ValueError:
try:
_section[key] = float(val)
except ValueError:
if isinstance(val, str) and val.lower() in ('t', 'true'):
_section[key] = True
elif isinstance(val, str) and val.lower() in ('f', 'false'):
_section[key] = False
return _section
def write(self, fp: IO, space_around_delimiters: bool = True): # type: ignore[override]
# This is based on the configparser.RawConfigParser.write method code to add support for
# reading options from environment variables.
# Various type ignores below deal with less-than-perfect RawConfigParser superclass typing
if space_around_delimiters:
delimiter = f" {self._delimiters[0]} " # type: ignore[attr-defined]
else:
delimiter = self._delimiters[0] # type: ignore[attr-defined]
if self._defaults: # type: ignore
self._write_section( # type: ignore[attr-defined]
fp, self.default_section, self._defaults.items(), delimiter # type: ignore[attr-defined]
)
for section in self._sections: # type: ignore[attr-defined]
item_section: ConfigOptionsDictType = self.getsection(section) # type: ignore[assignment]
self._write_section(fp, section, item_section.items(), delimiter) # type: ignore[attr-defined]
def as_dict(
self,
display_source: bool = False,
display_sensitive: bool = False,
raw: bool = False,
include_env: bool = True,
include_cmds: bool = True,
include_secret: bool = True,
) -> ConfigSourcesType:
"""
Returns the current configuration as an OrderedDict of OrderedDicts.
When materializing current configuration Airflow defaults are
materialized along with user set configs. If any of the `include_*`
options are False then the result of calling command or secret key
configs do not override Airflow defaults and instead are passed through.
In order to then avoid Airflow defaults from overwriting user set
command or secret key configs we filter out bare sensitive_config_values
that are set to Airflow defaults when command or secret key configs
produce different values.
:param display_source: If False, the option value is returned. If True,
a tuple of (option_value, source) is returned. Source is either
'airflow.cfg', 'default', 'env var', or 'cmd'.
:param display_sensitive: If True, the values of options set by env
vars and bash commands will be displayed. If False, those options
are shown as '< hidden >'
:param raw: Should the values be output as interpolated values, or the
"raw" form that can be fed back in to ConfigParser
:param include_env: Should the value of configuration from AIRFLOW__
environment variables be included or not
:param include_cmds: Should the result of calling any *_cmd config be
set (True, default), or should the _cmd options be left as the
command to run (False)
:param include_secret: Should the result of calling any *_secret config be
set (True, default), or should the _secret options be left as the
path to get the secret from (False)
:rtype: Dict[str, Dict[str, str]]
:return: Dictionary, where the key is the name of the section and the content is
the dictionary with the name of the parameter and its value.
"""
if not display_sensitive:
# We want to hide the sensitive values at the appropriate methods
# since envs from cmds, secrets can be read at _include_envs method
if not all([include_env, include_cmds, include_secret]):
raise ValueError(
"If display_sensitive is false, then include_env, "
"include_cmds, include_secret must all be set as True"
)
config_sources: ConfigSourcesType = {}
configs = [
('default', self.airflow_defaults),
('airflow.cfg', self),
]
self._replace_config_with_display_sources(
config_sources,
configs,
display_source,
raw,
self.deprecated_options,
include_cmds=include_cmds,
include_env=include_env,
include_secret=include_secret,
)
# add env vars and overwrite because they have priority
if include_env:
self._include_envs(config_sources, display_sensitive, display_source, raw)
else:
self._filter_by_source(config_sources, display_source, self._get_env_var_option)
# add bash commands
if include_cmds:
self._include_commands(config_sources, display_sensitive, display_source, raw)
else:
self._filter_by_source(config_sources, display_source, self._get_cmd_option)
# add config from secret backends
if include_secret:
self._include_secrets(config_sources, display_sensitive, display_source, raw)
else:
self._filter_by_source(config_sources, display_source, self._get_secret_option)
if not display_sensitive:
# This ensures the ones from config file is hidden too
# if they are not provided through env, cmd and secret
hidden = '< hidden >'
for (section, key) in self.sensitive_config_values:
if not config_sources.get(section):
continue
if config_sources[section].get(key, None):
if display_source:
source = config_sources[section][key][1]
config_sources[section][key] = (hidden, source)
else:
config_sources[section][key] = hidden
return config_sources
def _include_secrets(
self,
config_sources: ConfigSourcesType,
display_sensitive: bool,
display_source: bool,
raw: bool,
):
for (section, key) in self.sensitive_config_values:
value: Optional[str] = self._get_secret_option_from_config_sources(config_sources, section, key)
if value:
if not display_sensitive:
value = '< hidden >'
if display_source:
opt: Union[str, Tuple[str, str]] = (value, 'secret')
elif raw:
opt = value.replace('%', '%%')
else:
opt = value
config_sources.setdefault(section, OrderedDict()).update({key: opt})
del config_sources[section][key + '_secret']
def _include_commands(
self,
config_sources: ConfigSourcesType,
display_sensitive: bool,
display_source: bool,
raw: bool,
):
for (section, key) in self.sensitive_config_values:
opt = self._get_cmd_option_from_config_sources(config_sources, section, key)
if not opt:
continue
opt_to_set: Union[str, Tuple[str, str], None] = opt
if not display_sensitive:
opt_to_set = '< hidden >'
if display_source:
opt_to_set = (str(opt_to_set), 'cmd')
elif raw:
opt_to_set = str(opt_to_set).replace('%', '%%')
if opt_to_set is not None:
dict_to_update: Dict[str, Union[str, Tuple[str, str]]] = {key: opt_to_set}
config_sources.setdefault(section, OrderedDict()).update(dict_to_update)
del config_sources[section][key + '_cmd']
def _include_envs(
self,
config_sources: ConfigSourcesType,