desec-stack/api/api/settings.py

"""
Django settings for desecapi project.

For more information on this file, see
https://docs.djangoproject.com/en/1.7/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.7/ref/settings/
"""

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
import os
from datetime import timedelta

from django.conf.global_settings import PASSWORD_HASHERS as DEFAULT_PASSWORD_HASHERS

BASE_DIR = os.path.dirname(os.path.dirname(__file__))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.7/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ['DESECSTACK_API_SECRETKEY']

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = False
if os.environ.get('DESECSTACK_API_DEBUG', "").upper() == "TRUE":
    DEBUG = True

ALLOWED_HOSTS = [
    'api',
    'desec.%s' % os.environ['DESECSTACK_DOMAIN'],
    'update.dedyn.%s' % os.environ['DESECSTACK_DOMAIN'],
    'update6.dedyn.%s' % os.environ['DESECSTACK_DOMAIN'],
]


# Application definition

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'rest_framework',
    'desecapi.apps.AppConfig',
    'corsheaders',
    'django_prometheus',
)

MIDDLEWARE = (
    'django_prometheus.middleware.PrometheusBeforeMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django_prometheus.middleware.PrometheusAfterMiddleware',
)

ROOT_URLCONF = 'api.urls'

WSGI_APPLICATION = 'desecapi.wsgi.application'


DATABASES = {
    'default': {
        'ENGINE': 'django_prometheus.db.backends.postgresql',
        'NAME': 'desec',
        'USER': 'desec',
        'PASSWORD': os.environ['DESECSTACK_DBAPI_PASSWORD_desec'],
        'HOST': 'dbapi',
    },
}

CACHES = {
    'default': {
        # TODO 'BACKEND': 'django_prometheus.cache.backends.memcached.PyLibMCCache' not supported
        'BACKEND': 'django.core.cache.backends.memcached.PyLibMCCache',
        'LOCATION': 'memcached:11211',
    }
}

# This is necessary because the default is America/Chicago
TIME_ZONE = 'UTC'

USE_TZ = True

REST_FRAMEWORK = {
    'DEFAULT_RENDERER_CLASSES': (
        'rest_framework.renderers.JSONRenderer',
    ),
    'DEFAULT_PARSER_CLASSES': (
        'rest_framework.parsers.JSONParser',
    ),
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'desecapi.authentication.TokenAuthentication',
    ),
    'DEFAULT_PAGINATION_CLASS': 'desecapi.pagination.LinkHeaderCursorPagination',
    'PAGE_SIZE': 500,
    'TEST_REQUEST_DEFAULT_FORMAT': 'json',
    'EXCEPTION_HANDLER': 'desecapi.exception_handlers.exception_handler',
    'DEFAULT_VERSIONING_CLASS': 'rest_framework.versioning.NamespaceVersioning',
    'ALLOWED_VERSIONS': ['v1', 'v2'],
    'DEFAULT_THROTTLE_CLASSES': [
        'desecapi.throttling.ScopedRatesThrottle',
        'rest_framework.throttling.UserRateThrottle',
    ],
    'DEFAULT_THROTTLE_RATES': {
        # ScopedRatesThrottle
        'account_management_active': ['3/min'],  # things with side effect, e.g. sending mail or zone creation on signup
        'account_management_passive': ['10/min'],  # things like GET'ing v/* or auth/* URLs, or creating/deleting tokens
        'dyndns': ['1/min'],  # dynDNS updates; anything above 1/min is a client misconfiguration
        'dns_api_read': ['10/s', '50/min'],  # DNS API requests that do not involve pdns
        'dns_api_write': ['6/s', '50/min', '200/h'],  # DNS API requests that do involve pdns
        # UserRateThrottle
        'user': '1000/d',  # hard limit on requests by a) an authenticated user, b) an unauthenticated IP address
    },
    'NUM_PROXIES': 0,  # Do not use X-Forwarded-For header when determining IP for throttling
}

PASSWORD_HASHER_TOKEN = 'desecapi.authentication.TokenHasher'
PASSWORD_HASHERS = DEFAULT_PASSWORD_HASHERS + [PASSWORD_HASHER_TOKEN]

# CORS
# No need to add Authorization to CORS_ALLOW_HEADERS (included by default)
CORS_ORIGIN_ALLOW_ALL = True

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

# How and where to send mail
EMAIL_BACKEND = 'desecapi.mail_backends.MultiLaneEmailBackend'
EMAIL_HOST = os.environ['DESECSTACK_API_EMAIL_HOST']
EMAIL_HOST_USER = os.environ['DESECSTACK_API_EMAIL_HOST_USER']
EMAIL_HOST_PASSWORD = os.environ['DESECSTACK_API_EMAIL_HOST_PASSWORD']
EMAIL_PORT = os.environ['DESECSTACK_API_EMAIL_PORT']
EMAIL_USE_TLS = True
DEFAULT_FROM_EMAIL = 'deSEC <support@desec.io>'
ADMINS = [(address.split("@")[0], address) for address in os.environ['DESECSTACK_API_ADMIN'].split()]

DESECSTACK_DOMAIN = os.environ['DESECSTACK_DOMAIN']

# default NS records
DEFAULT_NS = [name + '.' for name in os.environ['DESECSTACK_NS'].strip().split()]
DEFAULT_NS_TTL = os.environ['DESECSTACK_NSLORD_DEFAULT_TTL']

# Public Suffix settings
PSL_RESOLVER = os.environ.get('DESECSTACK_API_PSL_RESOLVER')
LOCAL_PUBLIC_SUFFIXES = {'dedyn.%s' % os.environ['DESECSTACK_DOMAIN']}

# PowerDNS-related
NSLORD_PDNS_API = 'http://nslord:8081/api/v1/servers/localhost'
NSLORD_PDNS_API_TOKEN = os.environ['DESECSTACK_NSLORD_APIKEY']
NSMASTER_PDNS_API = 'http://nsmaster:8081/api/v1/servers/localhost'
NSMASTER_PDNS_API_TOKEN = os.environ['DESECSTACK_NSMASTER_APIKEY']
CATALOG_ZONE = 'catalog.internal'

# Celery
CELERY_BROKER_URL = 'amqp://rabbitmq'
CELERY_EMAIL_MESSAGE_EXTRA_ATTRIBUTES = []  # required because djcelery_email.utils accesses it
CELERY_TASK_TIME_LIMIT = 30
TASK_CONFIG = {  # The first entry is the default queue
    'email_slow_lane': {'rate_limit': '3/m'},
    'email_fast_lane': {'rate_limit': '1/s'},
    'email_immediate_lane': {'rate_limit': None},
}

# pdns accepts request payloads of this size.
# This will hopefully soon be configurable: https://github.com/PowerDNS/pdns/pull/7550
PDNS_MAX_BODY_SIZE = 16 * 1024 * 1024

# SEPA direct debit settings
SEPA = {
    'CREDITOR_ID': os.environ['DESECSTACK_API_SEPA_CREDITOR_ID'],
    'CREDITOR_NAME': os.environ['DESECSTACK_API_SEPA_CREDITOR_NAME'],
}

# user management
AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
        'OPTIONS': {'min_length': 8}
    },
]
MINIMUM_TTL_DEFAULT = int(os.environ['DESECSTACK_MINIMUM_TTL_DEFAULT'])
AUTH_USER_MODEL = 'desecapi.User'
LIMIT_USER_DOMAIN_COUNT_DEFAULT = 5
USER_ACTIVATION_REQUIRED = True
VALIDITY_PERIOD_VERIFICATION_SIGNATURE = timedelta(hours=int(os.environ.get('DESECSTACK_API_AUTHACTION_VALIDITY', '0')))

# CAPTCHA
CAPTCHA_VALIDITY_PERIOD = timedelta(hours=24)

# Watchdog
WATCHDOG_SLAVES = os.environ.get('DESECSTACK_WATCHDOG_SLAVES', '').split()
WATCHDOG_WINDOW_SEC = 600

# Prometheus (see https://github.com/korfuri/django-prometheus/blob/master/documentation/exports.md)
#  TODO Switch to PROMETHEUS_METRICS_EXPORT_PORT_RANGE instead of this workaround, which currently necessary to due
#  https://github.com/korfuri/django-prometheus/issues/215
try:
    import uwsgi
except ImportError:
    pass  # not running in uwsgi, e.g. management command
else:
    import prometheus_client
    prometheus_client.values.ValueClass = prometheus_client.values.MultiProcessValue(
        process_identifier=uwsgi.worker_id)

if DEBUG and not EMAIL_HOST:
    EMAIL_BACKEND = 'django.core.mail.backends.dummy.EmailBackend'

if os.environ.get('DESECSTACK_E2E_TEST', "").upper() == "TRUE":
    DEBUG = True
    LIMIT_USER_DOMAIN_COUNT_DEFAULT = 5000
    USER_ACTIVATION_REQUIRED = False
    EMAIL_BACKEND = 'django.core.mail.backends.dummy.EmailBackend'
    REST_FRAMEWORK['DEFAULT_THROTTLE_CLASSES'] = []