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MatrixSynapse/synapse/_scripts/synapse_port_db.py

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#!/usr/bin/env python
# Copyright 2015, 2016 OpenMarket Ltd
# Copyright 2018 New Vector Ltd
# Copyright 2019 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 curses
import logging
import os
import sys
import time
import traceback
from types import TracebackType
from typing import (
Any,
Awaitable,
Callable,
Dict,
Generator,
Iterable,
List,
NoReturn,
Optional,
Set,
Tuple,
Type,
TypeVar,
cast,
)
import yaml
from typing_extensions import TypedDict
from twisted.internet import defer, reactor as reactor_
from synapse.config.database import DatabaseConnectionConfig
from synapse.config.homeserver import HomeServerConfig
from synapse.logging.context import (
LoggingContext,
make_deferred_yieldable,
run_in_background,
)
from synapse.notifier import ReplicationNotifier
from synapse.storage.database import DatabasePool, LoggingTransaction, make_conn
from synapse.storage.databases.main import FilteringWorkerStore, PushRuleStore
from synapse.storage.databases.main.account_data import AccountDataWorkerStore
from synapse.storage.databases.main.client_ips import ClientIpBackgroundUpdateStore
from synapse.storage.databases.main.deviceinbox import DeviceInboxBackgroundUpdateStore
from synapse.storage.databases.main.devices import DeviceBackgroundUpdateStore
from synapse.storage.databases.main.e2e_room_keys import EndToEndRoomKeyBackgroundStore
from synapse.storage.databases.main.end_to_end_keys import EndToEndKeyBackgroundStore
from synapse.storage.databases.main.event_push_actions import EventPushActionsStore
from synapse.storage.databases.main.events_bg_updates import (
EventsBackgroundUpdatesStore,
)
from synapse.storage.databases.main.media_repository import (
MediaRepositoryBackgroundUpdateStore,
)
from synapse.storage.databases.main.presence import PresenceBackgroundUpdateStore
from synapse.storage.databases.main.profile import ProfileWorkerStore
from synapse.storage.databases.main.pusher import (
PusherBackgroundUpdatesStore,
PusherWorkerStore,
)
from synapse.storage.databases.main.receipts import ReceiptsBackgroundUpdateStore
from synapse.storage.databases.main.registration import (
RegistrationBackgroundUpdateStore,
find_max_generated_user_id_localpart,
)
from synapse.storage.databases.main.relations import RelationsWorkerStore
from synapse.storage.databases.main.room import RoomBackgroundUpdateStore
from synapse.storage.databases.main.roommember import RoomMemberBackgroundUpdateStore
from synapse.storage.databases.main.search import SearchBackgroundUpdateStore
from synapse.storage.databases.main.state import MainStateBackgroundUpdateStore
from synapse.storage.databases.main.stats import StatsStore
from synapse.storage.databases.main.user_directory import (
UserDirectoryBackgroundUpdateStore,
)
from synapse.storage.databases.state.bg_updates import StateBackgroundUpdateStore
from synapse.storage.engines import create_engine
from synapse.storage.prepare_database import prepare_database
from synapse.types import ISynapseReactor
from synapse.util import SYNAPSE_VERSION, Clock
# Cast safety: Twisted does some naughty magic which replaces the
# twisted.internet.reactor module with a Reactor instance at runtime.
reactor = cast(ISynapseReactor, reactor_)
logger = logging.getLogger("synapse_port_db")
# SQLite doesn't have a dedicated boolean type (it stores True/False as 1/0). This means
# portdb will read sqlite bools as integers, then try to insert them into postgres
# boolean columns---which fails. Lacking some Python-parseable metaschema, we must
# specify which integer columns should be inserted as booleans into postgres.
BOOLEAN_COLUMNS = {
"access_tokens": ["used"],
"account_validity": ["email_sent"],
"device_lists_changes_in_room": ["converted_to_destinations"],
"device_lists_outbound_pokes": ["sent"],
"devices": ["hidden"],
"e2e_fallback_keys_json": ["used"],
"e2e_room_keys": ["is_verified"],
"event_edges": ["is_state"],
"events": ["processed", "outlier", "contains_url"],
"local_media_repository": ["safe_from_quarantine"],
"presence_list": ["accepted"],
"presence_stream": ["currently_active"],
"public_room_list_stream": ["visibility"],
"pushers": ["enabled"],
"redactions": ["have_censored"],
"room_stats_state": ["is_federatable"],
"rooms": ["is_public", "has_auth_chain_index"],
"users": ["shadow_banned", "approved"],
"un_partial_stated_event_stream": ["rejection_status_changed"],
"users_who_share_rooms": ["share_private"],
"per_user_experimental_features": ["enabled"],
}
# These tables are never deleted from in normal operation [*], so we can resume porting
# over rows from a previous attempt rather than starting from scratch.
#
# [*]: We do delete from many of these tables when purging a room, and
# presumably when purging old events. So we might e.g.
#
# 1. Run portdb and port half of some table.
# 2. Stop portdb.
# 3. Purge something, deleting some of the rows we've ported over.
# 4. Restart portdb. The rows deleted from sqlite are still present in postgres.
#
# But this isn't the end of the world: we should be able to repeat the purge
# on the postgres DB when porting completes.
APPEND_ONLY_TABLES = [
"cache_invalidation_stream_by_instance",
"event_auth",
"event_edges",
"event_json",
"event_reference_hashes",
"event_search",
"event_to_state_groups",
"events",
"ex_outlier_stream",
"local_media_repository",
"local_media_repository_thumbnails",
"presence_stream",
"public_room_list_stream",
"push_rules_stream",
"received_transactions",
"redactions",
"rejections",
"remote_media_cache",
"remote_media_cache_thumbnails",
"room_memberships",
"room_names",
"rooms",
"sent_transactions",
"state_events",
"state_group_edges",
"state_groups",
"state_groups_state",
"stream_ordering_to_exterm",
"topics",
"transaction_id_to_pdu",
"un_partial_stated_event_stream",
"users",
]
IGNORED_TABLES = {
# We don't port these tables, as they're a faff and we can regenerate
# them anyway.
"user_directory",
"user_directory_search",
"user_directory_search_content",
"user_directory_search_docsize",
"user_directory_search_segdir",
"user_directory_search_segments",
"user_directory_search_stat",
"user_directory_search_pos",
"users_who_share_private_rooms",
"users_in_public_room",
# UI auth sessions have foreign keys so additional care needs to be taken,
# the sessions are transient anyway, so ignore them.
"ui_auth_sessions",
"ui_auth_sessions_credentials",
"ui_auth_sessions_ips",
}
# Error returned by the run function. Used at the top-level part of the script to
# handle errors and return codes.
end_error: Optional[str] = None
# The exec_info for the error, if any. If error is defined but not exec_info the script
# will show only the error message without the stacktrace, if exec_info is defined but
# not the error then the script will show nothing outside of what's printed in the run
# function. If both are defined, the script will print both the error and the stacktrace.
end_error_exec_info: Optional[
Tuple[Type[BaseException], BaseException, TracebackType]
] = None
R = TypeVar("R")
class Store(
EventPushActionsStore,
ClientIpBackgroundUpdateStore,
DeviceInboxBackgroundUpdateStore,
DeviceBackgroundUpdateStore,
EventsBackgroundUpdatesStore,
MediaRepositoryBackgroundUpdateStore,
RegistrationBackgroundUpdateStore,
RoomBackgroundUpdateStore,
RoomMemberBackgroundUpdateStore,
SearchBackgroundUpdateStore,
StateBackgroundUpdateStore,
MainStateBackgroundUpdateStore,
UserDirectoryBackgroundUpdateStore,
EndToEndKeyBackgroundStore,
EndToEndRoomKeyBackgroundStore,
StatsStore,
AccountDataWorkerStore,
FilteringWorkerStore,
ProfileWorkerStore,
PushRuleStore,
PusherWorkerStore,
PusherBackgroundUpdatesStore,
PresenceBackgroundUpdateStore,
ReceiptsBackgroundUpdateStore,
RelationsWorkerStore,
):
def execute(self, f: Callable[..., R], *args: Any, **kwargs: Any) -> Awaitable[R]:
return self.db_pool.runInteraction(f.__name__, f, *args, **kwargs)
def execute_sql(self, sql: str, *args: object) -> Awaitable[List[Tuple]]:
def r(txn: LoggingTransaction) -> List[Tuple]:
txn.execute(sql, args)
return txn.fetchall()
return self.db_pool.runInteraction("execute_sql", r)
def insert_many_txn(
self, txn: LoggingTransaction, table: str, headers: List[str], rows: List[Tuple]
) -> None:
sql = "INSERT INTO %s (%s) VALUES (%s)" % (
table,
", ".join(k for k in headers),
", ".join("%s" for _ in headers),
)
try:
txn.executemany(sql, rows)
except Exception:
logger.exception("Failed to insert: %s", table)
raise
# Note: the parent method is an `async def`.
def set_room_is_public(self, room_id: str, is_public: bool) -> NoReturn:
raise Exception(
"Attempt to set room_is_public during port_db: database not empty?"
)
class MockHomeserver:
def __init__(self, config: HomeServerConfig):
self.clock = Clock(reactor)
self.config = config
self.hostname = config.server.server_name
self.version_string = SYNAPSE_VERSION
def get_clock(self) -> Clock:
return self.clock
def get_reactor(self) -> ISynapseReactor:
return reactor
def get_instance_name(self) -> str:
return "master"
def should_send_federation(self) -> bool:
return False
def get_replication_notifier(self) -> ReplicationNotifier:
return ReplicationNotifier()
class Porter:
def __init__(
self,
sqlite_config: Dict[str, Any],
progress: "Progress",
batch_size: int,
hs_config: HomeServerConfig,
):
self.sqlite_config = sqlite_config
self.progress = progress
self.batch_size = batch_size
self.hs_config = hs_config
async def setup_table(self, table: str) -> Tuple[str, int, int, int, int]:
if table in APPEND_ONLY_TABLES:
# It's safe to just carry on inserting.
row = await self.postgres_store.db_pool.simple_select_one(
table="port_from_sqlite3",
keyvalues={"table_name": table},
retcols=("forward_rowid", "backward_rowid"),
allow_none=True,
)
total_to_port = None
if row is None:
if table == "sent_transactions":
(
forward_chunk,
already_ported,
total_to_port,
) = await self._setup_sent_transactions()
backward_chunk = 0
else:
await self.postgres_store.db_pool.simple_insert(
table="port_from_sqlite3",
values={
"table_name": table,
"forward_rowid": 1,
"backward_rowid": 0,
},
)
forward_chunk = 1
backward_chunk = 0
already_ported = 0
else:
forward_chunk = row["forward_rowid"]
backward_chunk = row["backward_rowid"]
if total_to_port is None:
already_ported, total_to_port = await self._get_total_count_to_port(
table, forward_chunk, backward_chunk
)
else:
def delete_all(txn: LoggingTransaction) -> None:
txn.execute(
"DELETE FROM port_from_sqlite3 WHERE table_name = %s", (table,)
)
txn.execute("TRUNCATE %s CASCADE" % (table,))
await self.postgres_store.execute(delete_all)
await self.postgres_store.db_pool.simple_insert(
table="port_from_sqlite3",
values={"table_name": table, "forward_rowid": 1, "backward_rowid": 0},
)
forward_chunk = 1
backward_chunk = 0
already_ported, total_to_port = await self._get_total_count_to_port(
table, forward_chunk, backward_chunk
)
return table, already_ported, total_to_port, forward_chunk, backward_chunk
async def get_table_constraints(self) -> Dict[str, Set[str]]:
"""Returns a map of tables that have foreign key constraints to tables they depend on."""
def _get_constraints(txn: LoggingTransaction) -> Dict[str, Set[str]]:
# We can pull the information about foreign key constraints out from
# the postgres schema tables.
sql = """
SELECT DISTINCT
tc.table_name,
ccu.table_name AS foreign_table_name
FROM
information_schema.table_constraints AS tc
INNER JOIN information_schema.constraint_column_usage AS ccu
USING (table_schema, constraint_name)
WHERE tc.constraint_type = 'FOREIGN KEY'
AND tc.table_name != ccu.table_name;
"""
txn.execute(sql)
results: Dict[str, Set[str]] = {}
for table, foreign_table in txn:
results.setdefault(table, set()).add(foreign_table)
return results
return await self.postgres_store.db_pool.runInteraction(
"get_table_constraints", _get_constraints
)
async def handle_table(
self,
table: str,
postgres_size: int,
table_size: int,
forward_chunk: int,
backward_chunk: int,
) -> None:
logger.info(
"Table %s: %i/%i (rows %i-%i) already ported",
table,
postgres_size,
table_size,
backward_chunk + 1,
forward_chunk - 1,
)
if not table_size:
return
self.progress.add_table(table, postgres_size, table_size)
if table == "event_search":
await self.handle_search_table(
postgres_size, table_size, forward_chunk, backward_chunk
)
return
if table in IGNORED_TABLES:
self.progress.update(table, table_size) # Mark table as done
return
if table == "user_directory_stream_pos":
# We need to make sure there is a single row, `(X, null), as that is
# what synapse expects to be there.
await self.postgres_store.db_pool.simple_insert(
table=table, values={"stream_id": None}
)
self.progress.update(table, table_size) # Mark table as done
return
# We sweep over rowids in two directions: one forwards (rowids 1, 2, 3, ...)
# and another backwards (rowids 0, -1, -2, ...).
forward_select = (
"SELECT rowid, * FROM %s WHERE rowid >= ? ORDER BY rowid LIMIT ?" % (table,)
)
backward_select = (
"SELECT rowid, * FROM %s WHERE rowid <= ? ORDER BY rowid DESC LIMIT ?"
% (table,)
)
do_forward = [True]
do_backward = [True]
while True:
def r(
txn: LoggingTransaction,
) -> Tuple[Optional[List[str]], List[Tuple], List[Tuple]]:
forward_rows = []
backward_rows = []
if do_forward[0]:
txn.execute(forward_select, (forward_chunk, self.batch_size))
forward_rows = txn.fetchall()
if not forward_rows:
do_forward[0] = False
if do_backward[0]:
txn.execute(backward_select, (backward_chunk, self.batch_size))
backward_rows = txn.fetchall()
if not backward_rows:
do_backward[0] = False
if forward_rows or backward_rows:
headers = [column[0] for column in txn.description]
else:
headers = None
return headers, forward_rows, backward_rows
headers, frows, brows = await self.sqlite_store.db_pool.runInteraction(
"select", r
)
if frows or brows:
assert headers is not None
if frows:
forward_chunk = max(row[0] for row in frows) + 1
if brows:
backward_chunk = min(row[0] for row in brows) - 1
rows = frows + brows
rows = self._convert_rows(table, headers, rows)
def insert(txn: LoggingTransaction) -> None:
assert headers is not None
self.postgres_store.insert_many_txn(txn, table, headers[1:], rows)
self.postgres_store.db_pool.simple_update_one_txn(
txn,
table="port_from_sqlite3",
keyvalues={"table_name": table},
updatevalues={
"forward_rowid": forward_chunk,
"backward_rowid": backward_chunk,
},
)
await self.postgres_store.execute(insert)
postgres_size += len(rows)
self.progress.update(table, postgres_size)
else:
return
async def handle_search_table(
self,
postgres_size: int,
table_size: int,
forward_chunk: int,
backward_chunk: int,
) -> None:
select = (
"SELECT es.rowid, es.*, e.origin_server_ts, e.stream_ordering"
" FROM event_search as es"
" INNER JOIN events AS e USING (event_id, room_id)"
" WHERE es.rowid >= ?"
" ORDER BY es.rowid LIMIT ?"
)
while True:
def r(txn: LoggingTransaction) -> Tuple[List[str], List[Tuple]]:
txn.execute(select, (forward_chunk, self.batch_size))
rows = txn.fetchall()
headers = [column[0] for column in txn.description]
return headers, rows
headers, rows = await self.sqlite_store.db_pool.runInteraction("select", r)
if rows:
forward_chunk = rows[-1][0] + 1
# We have to treat event_search differently since it has a
# different structure in the two different databases.
def insert(txn: LoggingTransaction) -> None:
sql = (
"INSERT INTO event_search (event_id, room_id, key,"
" sender, vector, origin_server_ts, stream_ordering)"
" VALUES (?,?,?,?,to_tsvector('english', ?),?,?)"
)
rows_dict = []
for row in rows:
d = dict(zip(headers, row))
if "\0" in d["value"]:
logger.warning("dropping search row %s", d)
else:
rows_dict.append(d)
txn.executemany(
sql,
[
(
row["event_id"],
row["room_id"],
row["key"],
row["sender"],
row["value"],
row["origin_server_ts"],
row["stream_ordering"],
)
for row in rows_dict
],
)
self.postgres_store.db_pool.simple_update_one_txn(
txn,
table="port_from_sqlite3",
keyvalues={"table_name": "event_search"},
updatevalues={
"forward_rowid": forward_chunk,
"backward_rowid": backward_chunk,
},
)
await self.postgres_store.execute(insert)
postgres_size += len(rows)
self.progress.update("event_search", postgres_size)
else:
return
def build_db_store(
self,
db_config: DatabaseConnectionConfig,
allow_outdated_version: bool = False,
) -> Store:
"""Builds and returns a database store using the provided configuration.
Args:
db_config: The database configuration
allow_outdated_version: True to suppress errors about the database server
version being too old to run a complete synapse
Returns:
The built Store object.
"""
self.progress.set_state("Preparing %s" % db_config.config["name"])
engine = create_engine(db_config.config)
hs = MockHomeserver(self.hs_config)
with make_conn(db_config, engine, "portdb") as db_conn:
engine.check_database(
db_conn, allow_outdated_version=allow_outdated_version
)
prepare_database(db_conn, engine, config=self.hs_config)
# Type safety: ignore that we're using Mock homeservers here.
store = Store(DatabasePool(hs, db_config, engine), db_conn, hs) # type: ignore[arg-type]
db_conn.commit()
return store
async def run_background_updates_on_postgres(self) -> None:
# Manually apply all background updates on the PostgreSQL database.
postgres_ready = (
await self.postgres_store.db_pool.updates.has_completed_background_updates()
)
if not postgres_ready:
# Only say that we're running background updates when there are background
# updates to run.
self.progress.set_state("Running background updates on PostgreSQL")
while not postgres_ready:
await self.postgres_store.db_pool.updates.do_next_background_update(True)
postgres_ready = await (
self.postgres_store.db_pool.updates.has_completed_background_updates()
)
@staticmethod
def _is_sqlite_autovacuum_enabled(txn: LoggingTransaction) -> bool:
"""
Returns true if auto_vacuum is enabled in SQLite.
https://www.sqlite.org/pragma.html#pragma_auto_vacuum
Vacuuming changes the rowids on rows in the database.
Auto-vacuuming is therefore dangerous when used in conjunction with this script.
Note that the auto_vacuum setting can't be changed without performing
a VACUUM after trying to change the pragma.
"""
txn.execute("PRAGMA auto_vacuum")
row = txn.fetchone()
assert row is not None, "`PRAGMA auto_vacuum` did not give a row."
(autovacuum_setting,) = row
# 0 means off. 1 means full. 2 means incremental.
return autovacuum_setting != 0
async def run(self) -> None:
"""Ports the SQLite database to a PostgreSQL database.
When a fatal error is met, its message is assigned to the global "end_error"
variable. When this error comes with a stacktrace, its exec_info is assigned to
the global "end_error_exec_info" variable.
"""
global end_error
try:
# we allow people to port away from outdated versions of sqlite.
self.sqlite_store = self.build_db_store(
DatabaseConnectionConfig("master-sqlite", self.sqlite_config),
allow_outdated_version=True,
)
# For safety, ensure auto_vacuums are disabled.
if await self.sqlite_store.db_pool.runInteraction(
"is_sqlite_autovacuum_enabled", self._is_sqlite_autovacuum_enabled
):
end_error = (
"auto_vacuum is enabled in the SQLite database."
" (This is not the default configuration.)\n"
" This script relies on rowids being consistent and must not"
" be used if the database could be vacuumed between re-runs.\n"
" To disable auto_vacuum, you need to stop Synapse and run the following SQL:\n"
" PRAGMA auto_vacuum=off;\n"
" VACUUM;"
)
return
# Check if all background updates are done, abort if not.
updates_complete = (
await self.sqlite_store.db_pool.updates.has_completed_background_updates()
)
if not updates_complete:
end_error = (
"Pending background updates exist in the SQLite3 database."
" Please start Synapse again and wait until every update has finished"
" before running this script.\n"
)
return
self.postgres_store = self.build_db_store(
self.hs_config.database.get_single_database()
)
await self.run_background_updates_on_postgres()
self.progress.set_state("Creating port tables")
def create_port_table(txn: LoggingTransaction) -> None:
txn.execute(
"CREATE TABLE IF NOT EXISTS port_from_sqlite3 ("
" table_name varchar(100) NOT NULL UNIQUE,"
" forward_rowid bigint NOT NULL,"
" backward_rowid bigint NOT NULL"
")"
)
# The old port script created a table with just a "rowid" column.
# We want people to be able to rerun this script from an old port
# so that they can pick up any missing events that were not
# ported across.
def alter_table(txn: LoggingTransaction) -> None:
txn.execute(
"ALTER TABLE IF EXISTS port_from_sqlite3"
" RENAME rowid TO forward_rowid"
)
txn.execute(
"ALTER TABLE IF EXISTS port_from_sqlite3"
" ADD backward_rowid bigint NOT NULL DEFAULT 0"
)
try:
await self.postgres_store.db_pool.runInteraction(
"alter_table", alter_table
)
except Exception:
# On Error Resume Next
pass
await self.postgres_store.db_pool.runInteraction(
"create_port_table", create_port_table
)
# Step 2. Set up sequences
#
# We do this before porting the tables so that event if we fail half
# way through the postgres DB always have sequences that are greater
# than their respective tables. If we don't then creating the
# `DataStore` object will fail due to the inconsistency.
self.progress.set_state("Setting up sequence generators")
await self._setup_state_group_id_seq()
await self._setup_user_id_seq()
await self._setup_events_stream_seqs()
await self._setup_sequence(
"device_inbox_sequence", ("device_inbox", "device_federation_outbox")
)
await self._setup_sequence(
"account_data_sequence",
("room_account_data", "room_tags_revisions", "account_data"),
)
await self._setup_sequence("receipts_sequence", ("receipts_linearized",))
await self._setup_sequence("presence_stream_sequence", ("presence_stream",))
await self._setup_auth_chain_sequence()
# Step 3. Get tables.
self.progress.set_state("Fetching tables")
sqlite_tables = await self.sqlite_store.db_pool.simple_select_onecol(
table="sqlite_master", keyvalues={"type": "table"}, retcol="name"
)
postgres_tables = await self.postgres_store.db_pool.simple_select_onecol(
table="information_schema.tables",
keyvalues={},
retcol="distinct table_name",
)
tables = set(sqlite_tables) & set(postgres_tables)
logger.info("Found %d tables", len(tables))
# Step 4. Figure out what still needs copying
self.progress.set_state("Checking on port progress")
setup_res = await make_deferred_yieldable(
defer.gatherResults(
[
run_in_background(self.setup_table, table)
for table in tables
if table not in ["schema_version", "applied_schema_deltas"]
and not table.startswith("sqlite_")
],
consumeErrors=True,
)
)
# Map from table name to args passed to `handle_table`, i.e. a tuple
# of: `postgres_size`, `table_size`, `forward_chunk`, `backward_chunk`.
tables_to_port_info_map = {r[0]: r[1:] for r in setup_res}
# Step 5. Do the copying.
#
# This is slightly convoluted as we need to ensure tables are ported
# in the correct order due to foreign key constraints.
self.progress.set_state("Copying to postgres")
constraints = await self.get_table_constraints()
tables_ported = set() # type: Set[str]
while tables_to_port_info_map:
# Pulls out all tables that are still to be ported and which
# only depend on tables that are already ported (if any).
tables_to_port = [
table
for table in tables_to_port_info_map
if not constraints.get(table, set()) - tables_ported
]
await make_deferred_yieldable(
defer.gatherResults(
[
run_in_background(
self.handle_table,
table,
*tables_to_port_info_map.pop(table),
)
for table in tables_to_port
],
consumeErrors=True,
)
)
tables_ported.update(tables_to_port)
self.progress.done()
except Exception as e:
global end_error_exec_info
end_error = str(e)
# Type safety: we're in an exception handler, so the exc_info() tuple
# will not be (None, None, None).
end_error_exec_info = sys.exc_info() # type: ignore[assignment]
logger.exception("")
finally:
reactor.stop()
def _convert_rows(
self, table: str, headers: List[str], rows: List[Tuple]
) -> List[Tuple]:
bool_col_names = BOOLEAN_COLUMNS.get(table, [])
bool_cols = [i for i, h in enumerate(headers) if h in bool_col_names]
class BadValueException(Exception):
pass
def conv(j: int, col: object) -> object:
if j in bool_cols:
return bool(col)
if isinstance(col, bytes):
return bytearray(col)
elif isinstance(col, str) and "\0" in col:
logger.warning(
"DROPPING ROW: NUL value in table %s col %s: %r",
table,
headers[j],
col,
)
raise BadValueException()
return col
outrows = []
for row in rows:
try:
outrows.append(
tuple(conv(j, col) for j, col in enumerate(row) if j > 0)
)
except BadValueException:
pass
return outrows
async def _setup_sent_transactions(self) -> Tuple[int, int, int]:
# Only save things from the last day
yesterday = int(time.time() * 1000) - 86400000
# And save the max transaction id from each destination
select = (
"SELECT rowid, * FROM sent_transactions WHERE rowid IN ("
"SELECT max(rowid) FROM sent_transactions"
" GROUP BY destination"
")"
)
def r(txn: LoggingTransaction) -> Tuple[List[str], List[Tuple]]:
txn.execute(select)
rows = txn.fetchall()
headers: List[str] = [column[0] for column in txn.description]
ts_ind = headers.index("ts")
return headers, [r for r in rows if r[ts_ind] < yesterday]
headers, rows = await self.sqlite_store.db_pool.runInteraction("select", r)
rows = self._convert_rows("sent_transactions", headers, rows)
inserted_rows = len(rows)
if inserted_rows:
max_inserted_rowid = max(r[0] for r in rows)
def insert(txn: LoggingTransaction) -> None:
self.postgres_store.insert_many_txn(
txn, "sent_transactions", headers[1:], rows
)
await self.postgres_store.execute(insert)
else:
max_inserted_rowid = 0
def get_start_id(txn: LoggingTransaction) -> int:
txn.execute(
"SELECT rowid FROM sent_transactions WHERE ts >= ?"
" ORDER BY rowid ASC LIMIT 1",
(yesterday,),
)
rows = txn.fetchall()
if rows:
return rows[0][0]
else:
return 1
next_chunk = await self.sqlite_store.execute(get_start_id)
next_chunk = max(max_inserted_rowid + 1, next_chunk)
await self.postgres_store.db_pool.simple_insert(
table="port_from_sqlite3",
values={
"table_name": "sent_transactions",
"forward_rowid": next_chunk,
"backward_rowid": 0,
},
)
def get_sent_table_size(txn: LoggingTransaction) -> int:
txn.execute(
"SELECT count(*) FROM sent_transactions" " WHERE ts >= ?", (yesterday,)
)
result = txn.fetchone()
assert result is not None
return int(result[0])
remaining_count = await self.sqlite_store.execute(get_sent_table_size)
total_count = remaining_count + inserted_rows
return next_chunk, inserted_rows, total_count
async def _get_remaining_count_to_port(
self, table: str, forward_chunk: int, backward_chunk: int
) -> int:
frows = cast(
List[Tuple[int]],
await self.sqlite_store.execute_sql(
"SELECT count(*) FROM %s WHERE rowid >= ?" % (table,), forward_chunk
),
)
brows = cast(
List[Tuple[int]],
await self.sqlite_store.execute_sql(
"SELECT count(*) FROM %s WHERE rowid <= ?" % (table,), backward_chunk
),
)
return frows[0][0] + brows[0][0]
async def _get_already_ported_count(self, table: str) -> int:
rows = await self.postgres_store.execute_sql(
"SELECT count(*) FROM %s" % (table,)
)
return rows[0][0]
async def _get_total_count_to_port(
self, table: str, forward_chunk: int, backward_chunk: int
) -> Tuple[int, int]:
remaining, done = await make_deferred_yieldable(
defer.gatherResults(
[
run_in_background(
self._get_remaining_count_to_port,
table,
forward_chunk,
backward_chunk,
),
run_in_background(self._get_already_ported_count, table),
],
)
)
remaining = int(remaining) if remaining else 0
done = int(done) if done else 0
return done, remaining + done
async def _setup_state_group_id_seq(self) -> None:
curr_id: Optional[
int
] = await self.sqlite_store.db_pool.simple_select_one_onecol(
table="state_groups", keyvalues={}, retcol="MAX(id)", allow_none=True
)
if not curr_id:
return
def r(txn: LoggingTransaction) -> None:
assert curr_id is not None
next_id = curr_id + 1
txn.execute("ALTER SEQUENCE state_group_id_seq RESTART WITH %s", (next_id,))
await self.postgres_store.db_pool.runInteraction("setup_state_group_id_seq", r)
async def _setup_user_id_seq(self) -> None:
curr_id = await self.sqlite_store.db_pool.runInteraction(
"setup_user_id_seq", find_max_generated_user_id_localpart
)
def r(txn: LoggingTransaction) -> None:
next_id = curr_id + 1
txn.execute("ALTER SEQUENCE user_id_seq RESTART WITH %s", (next_id,))
await self.postgres_store.db_pool.runInteraction("setup_user_id_seq", r)
async def _setup_events_stream_seqs(self) -> None:
"""Set the event stream sequences to the correct values."""
# We get called before we've ported the events table, so we need to
# fetch the current positions from the SQLite store.
curr_forward_id = await self.sqlite_store.db_pool.simple_select_one_onecol(
table="events", keyvalues={}, retcol="MAX(stream_ordering)", allow_none=True
)
curr_backward_id = await self.sqlite_store.db_pool.simple_select_one_onecol(
table="events",
keyvalues={},
retcol="MAX(-MIN(stream_ordering), 1)",
allow_none=True,
)
def _setup_events_stream_seqs_set_pos(txn: LoggingTransaction) -> None:
if curr_forward_id:
txn.execute(
"ALTER SEQUENCE events_stream_seq RESTART WITH %s",
(curr_forward_id + 1,),
)
if curr_backward_id:
txn.execute(
"ALTER SEQUENCE events_backfill_stream_seq RESTART WITH %s",
(curr_backward_id + 1,),
)
await self.postgres_store.db_pool.runInteraction(
"_setup_events_stream_seqs",
_setup_events_stream_seqs_set_pos,
)
async def _setup_sequence(
self, sequence_name: str, stream_id_tables: Iterable[str]
) -> None:
"""Set a sequence to the correct value."""
current_stream_ids = []
for stream_id_table in stream_id_tables:
max_stream_id = cast(
int,
await self.sqlite_store.db_pool.simple_select_one_onecol(
table=stream_id_table,
keyvalues={},
retcol="COALESCE(MAX(stream_id), 1)",
allow_none=True,
),
)
current_stream_ids.append(max_stream_id)
next_id = max(current_stream_ids) + 1
def r(txn: LoggingTransaction) -> None:
sql = "ALTER SEQUENCE %s RESTART WITH" % (sequence_name,)
txn.execute(sql + " %s", (next_id,))
await self.postgres_store.db_pool.runInteraction(
"_setup_%s" % (sequence_name,), r
)
async def _setup_auth_chain_sequence(self) -> None:
curr_chain_id: Optional[
int
] = await self.sqlite_store.db_pool.simple_select_one_onecol(
table="event_auth_chains",
keyvalues={},
retcol="MAX(chain_id)",
allow_none=True,
)
def r(txn: LoggingTransaction) -> None:
# Presumably there is at least one row in event_auth_chains.
assert curr_chain_id is not None
txn.execute(
"ALTER SEQUENCE event_auth_chain_id RESTART WITH %s",
(curr_chain_id + 1,),
)
if curr_chain_id is not None:
await self.postgres_store.db_pool.runInteraction(
"_setup_event_auth_chain_id",
r,
)
##############################################
# The following is simply UI stuff
##############################################
class TableProgress(TypedDict):
start: int
num_done: int
total: int
perc: int
class Progress:
"""Used to report progress of the port"""
def __init__(self) -> None:
self.tables: Dict[str, TableProgress] = {}
self.start_time = int(time.time())
def add_table(self, table: str, cur: int, size: int) -> None:
self.tables[table] = {
"start": cur,
"num_done": cur,
"total": size,
"perc": int(cur * 100 / size),
}
def update(self, table: str, num_done: int) -> None:
data = self.tables[table]
data["num_done"] = num_done
data["perc"] = int(num_done * 100 / data["total"])
def done(self) -> None:
pass
def set_state(self, state: str) -> None:
pass
class CursesProgress(Progress):
"""Reports progress to a curses window"""
def __init__(self, stdscr: "curses.window"):
self.stdscr = stdscr
curses.use_default_colors()
curses.curs_set(0)
curses.init_pair(1, curses.COLOR_RED, -1)
curses.init_pair(2, curses.COLOR_GREEN, -1)
self.last_update = 0.0
self.finished = False
self.total_processed = 0
self.total_remaining = 0
super(CursesProgress, self).__init__()
def update(self, table: str, num_done: int) -> None:
super(CursesProgress, self).update(table, num_done)
self.total_processed = 0
self.total_remaining = 0
for data in self.tables.values():
self.total_processed += data["num_done"] - data["start"]
self.total_remaining += data["total"] - data["num_done"]
self.render()
def render(self, force: bool = False) -> None:
now = time.time()
if not force and now - self.last_update < 0.2:
# reactor.callLater(1, self.render)
return
self.stdscr.clear()
rows, cols = self.stdscr.getmaxyx()
duration = int(now) - int(self.start_time)
minutes, seconds = divmod(duration, 60)
duration_str = "%02dm %02ds" % (minutes, seconds)
if self.finished:
status = "Time spent: %s (Done!)" % (duration_str,)
else:
if self.total_processed > 0:
left = float(self.total_remaining) / self.total_processed
est_remaining = (int(now) - self.start_time) * left
est_remaining_str = "%02dm %02ds remaining" % divmod(est_remaining, 60)
else:
est_remaining_str = "Unknown"
status = "Time spent: %s (est. remaining: %s)" % (
duration_str,
est_remaining_str,
)
self.stdscr.addstr(0, 0, status, curses.A_BOLD)
max_len = max(len(t) for t in self.tables.keys())
left_margin = 5
middle_space = 1
items = sorted(self.tables.items(), key=lambda i: (i[1]["perc"], i[0]))
for i, (table, data) in enumerate(items):
if i + 2 >= rows:
break
perc = data["perc"]
color = curses.color_pair(2) if perc == 100 else curses.color_pair(1)
self.stdscr.addstr(
i + 2, left_margin + max_len - len(table), table, curses.A_BOLD | color
)
size = 20
progress = "[%s%s]" % (
"#" * int(perc * size / 100),
" " * (size - int(perc * size / 100)),
)
self.stdscr.addstr(
i + 2,
left_margin + max_len + middle_space,
"%s %3d%% (%d/%d)" % (progress, perc, data["num_done"], data["total"]),
)
if self.finished:
self.stdscr.addstr(rows - 1, 0, "Press any key to exit...")
self.stdscr.refresh()
self.last_update = time.time()
def done(self) -> None:
self.finished = True
self.render(True)
self.stdscr.getch()
def set_state(self, state: str) -> None:
self.stdscr.clear()
self.stdscr.addstr(0, 0, state + "...", curses.A_BOLD)
self.stdscr.refresh()
class TerminalProgress(Progress):
"""Just prints progress to the terminal"""
def update(self, table: str, num_done: int) -> None:
super(TerminalProgress, self).update(table, num_done)
data = self.tables[table]
print(
"%s: %d%% (%d/%d)" % (table, data["perc"], data["num_done"], data["total"])
)
def set_state(self, state: str) -> None:
print(state + "...")
##############################################
##############################################
def main() -> None:
parser = argparse.ArgumentParser(
description="A script to port an existing synapse SQLite database to"
" a new PostgreSQL database."
)
parser.add_argument("-v", action="store_true")
parser.add_argument(
"--sqlite-database",
required=True,
help="The snapshot of the SQLite database file. This must not be"
" currently used by a running synapse server",
)
parser.add_argument(
"--postgres-config",
type=argparse.FileType("r"),
required=True,
help="The database config file for the PostgreSQL database",
)
parser.add_argument(
"--curses", action="store_true", help="display a curses based progress UI"
)
parser.add_argument(
"--batch-size",
type=int,
default=1000,
help="The number of rows to select from the SQLite table each"
" iteration [default=1000]",
)
args = parser.parse_args()
logging.basicConfig(
level=logging.DEBUG if args.v else logging.INFO,
format="%(asctime)s - %(name)s - %(lineno)d - %(levelname)s - %(message)s",
filename="port-synapse.log" if args.curses else None,
)
if not os.path.isfile(args.sqlite_database):
sys.stderr.write(
"The sqlite database you specified does not exist, please check that you have the"
"correct path."
)
sys.exit(1)
sqlite_config = {
"name": "sqlite3",
"args": {
"database": args.sqlite_database,
"cp_min": 1,
"cp_max": 1,
"check_same_thread": False,
},
}
hs_config = yaml.safe_load(args.postgres_config)
if "database" not in hs_config:
sys.stderr.write("The configuration file must have a 'database' section.\n")
sys.exit(4)
postgres_config = hs_config["database"]
if "name" not in postgres_config:
sys.stderr.write("Malformed database config: no 'name'\n")
sys.exit(2)
if postgres_config["name"] != "psycopg2":
sys.stderr.write("Database must use the 'psycopg2' connector.\n")
sys.exit(3)
config = HomeServerConfig()
config.parse_config_dict(hs_config, "", "")
def start(stdscr: Optional["curses.window"] = None) -> None:
progress: Progress
if stdscr:
progress = CursesProgress(stdscr)
else:
progress = TerminalProgress()
porter = Porter(
sqlite_config=sqlite_config,
progress=progress,
batch_size=args.batch_size,
hs_config=config,
)
@defer.inlineCallbacks
def run() -> Generator["defer.Deferred[Any]", Any, None]:
with LoggingContext("synapse_port_db_run"):
yield defer.ensureDeferred(porter.run())
reactor.callWhenRunning(run)
reactor.run()
if args.curses:
curses.wrapper(start)
else:
start()
if end_error:
if end_error_exec_info:
exc_type, exc_value, exc_traceback = end_error_exec_info
traceback.print_exception(exc_type, exc_value, exc_traceback)
sys.stderr.write(end_error)
sys.exit(5)
if __name__ == "__main__":
main()
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