1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2020-2021 The Matrix.org Foundation C.I.C.
#
# Licensed 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 argparse
import logging
import os
from synapse.config._base import Config, ConfigError
logger = logging.getLogger(__name__)
NON_SQLITE_DATABASE_PATH_WARNING = """\
Ignoring 'database_path' setting: not using a sqlite3 database.
--------------------------------------------------------------------------------
"""
DEFAULT_CONFIG = """\
## Database ##
# The 'database' setting defines the database that synapse uses to store all of
# its data.
#
# 'name' gives the database engine to use: either 'sqlite3' (for SQLite) or
# 'psycopg2' (for PostgreSQL).
#
# 'txn_limit' gives the maximum number of transactions to run per connection
# before reconnecting. Defaults to 0, which means no limit.
#
# 'args' gives options which are passed through to the database engine,
# except for options starting 'cp_', which are used to configure the Twisted
# connection pool. For a reference to valid arguments, see:
# * for sqlite: https://docs.python.org/3/library/sqlite3.html#sqlite3.connect
# * for postgres: https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PARAMKEYWORDS
# * for the connection pool: https://twistedmatrix.com/documents/current/api/twisted.enterprise.adbapi.ConnectionPool.html#__init__
#
#
# Example SQLite configuration:
#
#database:
# name: sqlite3
# args:
# database: /path/to/homeserver.db
#
#
# Example Postgres configuration:
#
#database:
# name: psycopg2
# txn_limit: 10000
# args:
# user: synapse_user
# password: secretpassword
# database: synapse
# host: localhost
# port: 5432
# cp_min: 5
# cp_max: 10
#
# For more information on using Synapse with Postgres,
# see https://matrix-org.github.io/synapse/latest/postgres.html.
#
database:
name: sqlite3
args:
database: %(database_path)s
"""
class DatabaseConnectionConfig:
"""Contains the connection config for a particular database.
Args:
name: A label for the database, used for logging.
db_config: The config for a particular database, as per `database`
section of main config. Has three fields: `name` for database
module name, `args` for the args to give to the database
connector, and optional `data_stores` that is a list of stores to
provision on this database (defaulting to all).
"""
def __init__(self, name: str, db_config: dict):
db_engine = db_config.get("name", "sqlite3")
if db_engine not in ("sqlite3", "psycopg2"):
raise ConfigError("Unsupported database type %r" % (db_engine,))
if db_engine == "sqlite3":
db_config.setdefault("args", {}).update(
{"cp_min": 1, "cp_max": 1, "check_same_thread": False}
)
data_stores = db_config.get("data_stores")
if data_stores is None:
data_stores = ["main", "state"]
self.name = name
self.config = db_config
# The `data_stores` config is actually talking about `databases` (we
# changed the name).
self.databases = data_stores
class DatabaseConfig(Config):
section = "database"
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.databases = []
def read_config(self, config, **kwargs) -> None:
# We *experimentally* support specifying multiple databases via the
# `databases` key. This is a map from a label to database config in the
# same format as the `database` config option, plus an extra
# `data_stores` key to specify which data store goes where. For example:
#
# databases:
# master:
# name: psycopg2
# data_stores: ["main"]
# args: {}
# state:
# name: psycopg2
# data_stores: ["state"]
# args: {}
multi_database_config = config.get("databases")
database_config = config.get("database")
database_path = config.get("database_path")
if multi_database_config and database_config:
raise ConfigError("Can't specify both 'database' and 'databases' in config")
if multi_database_config:
if database_path:
raise ConfigError("Can't specify 'database_path' with 'databases'")
self.databases = [
DatabaseConnectionConfig(name, db_conf)
for name, db_conf in multi_database_config.items()
]
if database_config:
self.databases = [DatabaseConnectionConfig("master", database_config)]
if database_path:
if self.databases and self.databases[0].name != "sqlite3":
logger.warning(NON_SQLITE_DATABASE_PATH_WARNING)
return
database_config = {"name": "sqlite3", "args": {}}
self.databases = [DatabaseConnectionConfig("master", database_config)]
self.set_databasepath(database_path)
def generate_config_section(self, data_dir_path, **kwargs) -> str:
return DEFAULT_CONFIG % {
"database_path": os.path.join(data_dir_path, "homeserver.db")
}
def read_arguments(self, args: argparse.Namespace) -> None:
"""
Cases for the cli input:
- If no databases are configured and no database_path is set, raise.
- No databases and only database_path available ==> sqlite3 db.
- If there are multiple databases and a database_path raise an error.
- If the database set in the config file is sqlite then
overwrite with the command line argument.
"""
if args.database_path is None:
if not self.databases:
raise ConfigError("No database config provided")
return
if len(self.databases) == 0:
database_config = {"name": "sqlite3", "args": {}}
self.databases = [DatabaseConnectionConfig("master", database_config)]
self.set_databasepath(args.database_path)
return
if self.get_single_database().name == "sqlite3":
self.set_databasepath(args.database_path)
else:
logger.warning(NON_SQLITE_DATABASE_PATH_WARNING)
def set_databasepath(self, database_path: str) -> None:
if database_path != ":memory:":
database_path = self.abspath(database_path)
self.databases[0].config["args"]["database"] = database_path
@staticmethod
def add_arguments(parser: argparse.ArgumentParser) -> None:
db_group = parser.add_argument_group("database")
db_group.add_argument(
"-d",
"--database-path",
metavar="SQLITE_DATABASE_PATH",
help="The path to a sqlite database to use.",
)
def get_single_database(self) -> DatabaseConnectionConfig:
"""Returns the database if there is only one, useful for e.g. tests"""
if not self.databases:
raise Exception("More than one database exists")
return self.databases[0]
|
