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Add a script to generate a clean config file 

Ultimately I want to make this part of the debian packaging process, to stop
the debian config getting out of sync.
This commit is contained in:
Richard van der Hoff 2018-12-20 23:11:50 +00:00
parent fc9cdbabe7
commit 59f93bbd5c
11 changed files with 157 additions and 46 deletions
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1
changelog.d/4315.feature Normal file
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@ -0,0 +1 @@
Add a script to generate a clean config file

67
scripts/generate_config Executable file
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@ -0,0 +1,67 @@
#!/usr/bin/env python
import argparse
import sys
from synapse.config.homeserver import HomeServerConfig
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument(
"--config-dir",
default="CONFDIR",
help="The path where the config files are kept. Used to create filenames for "
"things like the log config and the signing key. Default: %(default)s",
)
parser.add_argument(
"--data-dir",
default="DATADIR",
help="The path where the data files are kept. Used to create filenames for "
"things like the database and media store. Default: %(default)s",
)
parser.add_argument(
"--server-name",
default="SERVERNAME",
help="The server name. Used to initialise the server_name config param, but also "
"used in the names of some of the config files. Default: %(default)s",
)
parser.add_argument(
"--report-stats",
action="store",
help="Whether the generated config reports anonymized usage statistics",
choices=["yes", "no"],
)
parser.add_argument(
"--generate-secrets",
action="store_true",
help="Enable generation of new secrets for things like the macaroon_secret_key."
"By default, these parameters will be left unset."
)
parser.add_argument(
"-o", "--output-file",
type=argparse.FileType('w'),
default=sys.stdout,
help="File to write the configuration to. Default: stdout",
)
args = parser.parse_args()
report_stats = args.report_stats
if report_stats is not None:
report_stats = report_stats == "yes"
conf = HomeServerConfig().generate_config(
config_dir_path=args.config_dir,
data_dir_path=args.data_dir,
server_name=args.server_name,
generate_secrets=args.generate_secrets,
report_stats=report_stats,
)
args.output_file.write(conf)

56
synapse/config/_base.py
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@ -134,10 +134,6 @@ class Config(object):
with open(file_path) as file_stream:
return file_stream.read()
@staticmethod
def default_path(name):
return os.path.abspath(os.path.join(os.path.curdir, name))
@staticmethod
def read_config_file(file_path):
with open(file_path) as file_stream:
@ -151,8 +147,39 @@ class Config(object):
return results
def generate_config(
self, config_dir_path, server_name, is_generating_file, report_stats=None
self,
config_dir_path,
data_dir_path,
server_name,
generate_secrets=False,
report_stats=None,
):
"""Build a default configuration file
This is used both when the user explicitly asks us to generate a config file
(eg with --generate_config), and before loading the config at runtime (to give
a base which the config files override)
Args:
config_dir_path (str): The path where the config files are kept. Used to
create filenames for things like the log config and the signing key.
data_dir_path (str): The path where the data files are kept. Used to create
filenames for things like the database and media store.
server_name (str): The server name. Used to initialise the server_name
config param, but also used in the names of some of the config files.
generate_secrets (bool): True if we should generate new secrets for things
like the macaroon_secret_key. If False, these parameters will be left
unset.
report_stats (bool|None): Initial setting for the report_stats setting.
If None, report_stats will be left unset.
Returns:
str: the yaml config file
"""
default_config = "# vim:ft=yaml\n"
default_config += "\n\n".join(
@ -160,15 +187,14 @@ class Config(object):
for conf in self.invoke_all(
"default_config",
config_dir_path=config_dir_path,
data_dir_path=data_dir_path,
server_name=server_name,
is_generating_file=is_generating_file,
generate_secrets=generate_secrets,
report_stats=report_stats,
)
)
config = yaml.load(default_config)
return default_config, config
return default_config
@classmethod
def load_config(cls, description, argv):
@ -274,12 +300,14 @@ class Config(object):
if not cls.path_exists(config_dir_path):
os.makedirs(config_dir_path)
with open(config_path, "w") as config_file:
config_str, config = obj.generate_config(
config_str = obj.generate_config(
config_dir_path=config_dir_path,
data_dir_path=os.getcwd(),
server_name=server_name,
report_stats=(config_args.report_stats == "yes"),
is_generating_file=True,
generate_secrets=True,
)
config = yaml.load(config_str)
obj.invoke_all("generate_files", config)
config_file.write(config_str)
print(
@ -350,11 +378,13 @@ class Config(object):
raise ConfigError(MISSING_SERVER_NAME)
server_name = specified_config["server_name"]
_, config = self.generate_config(
config_string = self.generate_config(
config_dir_path=config_dir_path,
data_dir_path=os.getcwd(),
server_name=server_name,
is_generating_file=False,
generate_secrets=False,
)
config = yaml.load(config_string)
config.pop("log_config")
config.update(specified_config)

5
synapse/config/database.py
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@ -12,6 +12,7 @@
# 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 os
from ._base import Config
@ -45,8 +46,8 @@ class DatabaseConfig(Config):
self.set_databasepath(config.get("database_path"))
def default_config(self, **kwargs):
database_path = self.abspath("homeserver.db")
def default_config(self, data_dir_path, **kwargs):
database_path = os.path.join(data_dir_path, "homeserver.db")
return """\
# Database configuration
database:

7
synapse/config/homeserver.py
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@ -53,10 +53,3 @@ class HomeServerConfig(TlsConfig, ServerConfig, DatabaseConfig, LoggingConfig,
ServerNoticesConfig, RoomDirectoryConfig,
):
pass
if __name__ == '__main__':
import sys
sys.stdout.write(
HomeServerConfig().generate_config(sys.argv[1], sys.argv[2], True)[0]
)

27
synapse/config/key.py
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@ -66,26 +66,35 @@ class KeyConfig(Config):
# falsification of values
self.form_secret = config.get("form_secret", None)
def default_config(self, config_dir_path, server_name, is_generating_file=False,
def default_config(self, config_dir_path, server_name, generate_secrets=False,
**kwargs):
base_key_name = os.path.join(config_dir_path, server_name)
if is_generating_file:
macaroon_secret_key = random_string_with_symbols(50)
form_secret = '"%s"' % random_string_with_symbols(50)
if generate_secrets:
macaroon_secret_key = 'macaroon_secret_key: "%s"' % (
random_string_with_symbols(50),
)
form_secret = 'form_secret: "%s"' % random_string_with_symbols(50)
else:
macaroon_secret_key = None
form_secret = 'null'
macaroon_secret_key = "# macaroon_secret_key: <PRIVATE STRING>"
form_secret = "# form_secret: <PRIVATE STRING>"
return """\
macaroon_secret_key: "%(macaroon_secret_key)s"
# a secret which is used to sign access tokens. If none is specified,
# the registration_shared_secret is used, if one is given; otherwise,
# a secret key is derived from the signing key.
#
# Note that changing this will invalidate any active access tokens, so
# all clients will have to log back in.
%(macaroon_secret_key)s
# Used to enable access token expiration.
expire_access_token: False
# a secret which is used to calculate HMACs for form values, to stop
# falsification of values
form_secret: %(form_secret)s
# falsification of values. Must be specified for the User Consent
# forms to work.
%(form_secret)s
## Signing Keys ##

4
synapse/config/logger.py
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@ -80,9 +80,7 @@ class LoggingConfig(Config):
self.log_file = self.abspath(config.get("log_file"))
def default_config(self, config_dir_path, server_name, **kwargs):
log_config = self.abspath(
os.path.join(config_dir_path, server_name + ".log.config")
)
log_config = os.path.join(config_dir_path, server_name + ".log.config")
return """
# A yaml python logging config file
log_config: "%(log_config)s"

12
synapse/config/metrics.py
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@ -24,10 +24,16 @@ class MetricsConfig(Config):
self.metrics_bind_host = config.get("metrics_bind_host", "127.0.0.1")
def default_config(self, report_stats=None, **kwargs):
suffix = "" if report_stats is None else "report_stats: %(report_stats)s\n"
return ("""\
res = """\
## Metrics ###
# Enable collection and rendering of performance metrics
enable_metrics: False
""" + suffix) % locals()
"""
if report_stats is None:
res += "# report_stats: true|false\n"
else:
res += "report_stats: %s\n" % ('true' if report_stats else 'false')
return res

11
synapse/config/registration.py
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@ -50,8 +50,13 @@ class RegistrationConfig(Config):
raise ConfigError('Invalid auto_join_rooms entry %s' % (room_alias,))
self.autocreate_auto_join_rooms = config.get("autocreate_auto_join_rooms", True)
def default_config(self, **kwargs):
registration_shared_secret = random_string_with_symbols(50)
def default_config(self, generate_secrets=False, **kwargs):
if generate_secrets:
registration_shared_secret = 'registration_shared_secret: "%s"' % (
random_string_with_symbols(50),
)
else:
registration_shared_secret = '# registration_shared_secret: <PRIVATE STRING>'
return """\
## Registration ##
@ -78,7 +83,7 @@ class RegistrationConfig(Config):
# If set, allows registration by anyone who also has the shared
# secret, even if registration is otherwise disabled.
registration_shared_secret: "%(registration_shared_secret)s"
%(registration_shared_secret)s
# Set the number of bcrypt rounds used to generate password hash.
# Larger numbers increase the work factor needed to generate the hash.

8
synapse/config/repository.py
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@ -12,7 +12,7 @@
# 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 os
from collections import namedtuple
from synapse.util.module_loader import load_module
@ -175,9 +175,9 @@ class ContentRepositoryConfig(Config):
"url_preview_url_blacklist", ()
)
def default_config(self, **kwargs):
media_store = self.default_path("media_store")
uploads_path = self.default_path("uploads")
def default_config(self, data_dir_path, **kwargs):
media_store = os.path.join(data_dir_path, "media_store")
uploads_path = os.path.join(data_dir_path, "uploads")
return r"""
# Directory where uploaded images and attachments are stored.
media_store_path: "%(media_store)s"

5
synapse/config/server.py
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@ -15,6 +15,7 @@
# limitations under the License.
import logging
import os.path
from synapse.http.endpoint import parse_and_validate_server_name
@ -203,7 +204,7 @@ class ServerConfig(Config):
]
})
def default_config(self, server_name, **kwargs):
def default_config(self, server_name, data_dir_path, **kwargs):
_, bind_port = parse_and_validate_server_name(server_name)
if bind_port is not None:
unsecure_port = bind_port - 400
@ -211,7 +212,7 @@ class ServerConfig(Config):
bind_port = 8448
unsecure_port = 8008
pid_file = self.abspath("homeserver.pid")
pid_file = os.path.join(data_dir_path, "homeserver.pid")
return """\
## Server ##