forked-synapse/scripts/port_from_sqlite_to_postgres.py

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# -*- coding: utf-8 -*-
# Copyright 2015 OpenMarket Ltd
#
# 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.
from twisted.internet import defer, reactor
from twisted.enterprise import adbapi
from synapse.storage._base import LoggingTransaction, SQLBaseStore
from synapse.storage.engines import create_engine
import argparse
import itertools
import logging
import types
import yaml
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logger = logging.getLogger("port_from_sqlite_to_postgres")
BINARY_COLUMNS = {
"event_content_hashes": ["hash"],
"event_reference_hashes": ["hash"],
"event_signatures": ["signature"],
"event_edge_hashes": ["hash"],
"events": ["content", "unrecognized_keys"],
"event_json": ["internal_metadata", "json"],
"application_services_txns": ["event_ids"],
"received_transactions": ["response_json"],
"sent_transactions": ["response_json"],
"server_tls_certificates": ["tls_certificate"],
"server_signature_keys": ["verify_key"],
"pushers": ["pushkey", "data"],
"user_filters": ["filter_json"],
}
UNICODE_COLUMNS = {
"events": ["content", "unrecognized_keys"],
"event_json": ["internal_metadata", "json"],
"users": ["password_hash"],
}
BOOLEAN_COLUMNS = {
"events": ["processed", "outlier"],
"rooms": ["is_public"],
"event_edges": ["is_state"],
"presence_list": ["accepted"],
}
APPEND_ONLY_TABLES = [
"event_content_hashes",
"event_reference_hashes",
"event_signatures",
"event_edge_hashes",
"events",
"event_json",
"state_events",
"room_memberships",
"feedback",
"topics",
"room_names",
"rooms",
"local_media_repository",
"local_media_repository_thumbnails",
"remote_media_cache",
"remote_media_cache_thumbnails",
"redactions",
"event_edges",
"event_auth",
"received_transactions",
"sent_transactions",
"transaction_id_to_pdu",
"users",
"state_groups",
"state_groups_state",
"event_to_state_groups",
"rejections",
]
class Store(object):
def __init__(self, db_pool, engine):
self.db_pool = db_pool
self.database_engine = engine
_simple_insert_txn = SQLBaseStore.__dict__["_simple_insert_txn"]
_simple_insert = SQLBaseStore.__dict__["_simple_insert"]
_simple_select_onecol_txn = SQLBaseStore.__dict__["_simple_select_onecol_txn"]
_simple_select_onecol = SQLBaseStore.__dict__["_simple_select_onecol"]
_simple_select_one_onecol = SQLBaseStore.__dict__["_simple_select_one_onecol"]
_simple_select_one_onecol_txn = SQLBaseStore.__dict__["_simple_select_one_onecol_txn"]
_simple_update_one = SQLBaseStore.__dict__["_simple_update_one"]
_simple_update_one_txn = SQLBaseStore.__dict__["_simple_update_one_txn"]
_execute_and_decode = SQLBaseStore.__dict__["_execute_and_decode"]
def runInteraction(self, desc, func, *args, **kwargs):
def r(conn):
try:
i = 0
N = 5
while True:
try:
txn = conn.cursor()
return func(
LoggingTransaction(txn, desc, self.database_engine),
*args, **kwargs
)
except self.database_engine.module.DatabaseError as e:
if self.database_engine.is_deadlock(e):
logger.warn("[TXN DEADLOCK] {%s} %d/%d", desc, i, N)
if i < N:
i += 1
conn.rollback()
continue
raise
except Exception as e:
logger.debug("[TXN FAIL] {%s}", desc, e)
raise
return self.db_pool.runWithConnection(r)
def insert_many_txn(self, txn, table, headers, rows):
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:
logger.exception(
"Failed to insert: %s",
table,
)
raise
def chunks(n):
for i in itertools.count(0, n):
yield range(i, i+n)
@defer.inlineCallbacks
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def handle_table(table, sqlite_store, postgres_store):
if table in APPEND_ONLY_TABLES:
# It's safe to just carry on inserting.
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next_chunk = yield postgres_store._simple_select_one_onecol(
table="port_from_sqlite3",
keyvalues={"table_name": table},
retcol="rowid",
allow_none=True,
)
if next_chunk is None:
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yield postgres_store._simple_insert(
table="port_from_sqlite3",
values={"table_name": table, "rowid": 0}
)
next_chunk = 0
else:
def delete_all(txn):
txn.execute(
"DELETE FROM port_from_sqlite3 WHERE table_name = %s",
(table,)
)
txn.execute("TRUNCATE %s CASCADE" % (table,))
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postgres_store._simple_insert_txn(
txn,
table="port_from_sqlite3",
values={"table_name": table, "rowid": 0}
)
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yield postgres_store.runInteraction(
"delete_non_append_only", delete_all
)
next_chunk = 0
logger.info("next_chunk for %s: %d", table, next_chunk)
N = 5000
select = "SELECT rowid, * FROM %s WHERE rowid >= ? ORDER BY rowid LIMIT ?" % (table,)
uni_col_names = UNICODE_COLUMNS.get(table, [])
bool_col_names = BOOLEAN_COLUMNS.get(table, [])
bin_col_names = BINARY_COLUMNS.get(table, [])
while True:
def r(txn):
txn.execute(select, (next_chunk, N,))
rows = txn.fetchall()
headers = [column[0] for column in txn.description]
return headers, rows
headers, rows = yield sqlite_store.runInteraction("select", r)
logger.info("Got %d rows for %s", len(rows), table)
if rows:
uni_cols = [i for i, h in enumerate(headers) if h in uni_col_names]
bool_cols = [i for i, h in enumerate(headers) if h in bool_col_names]
bin_cols = [i for i, h in enumerate(headers) if h in bin_col_names]
next_chunk = rows[-1][0] + 1
def conv(j, col):
if j in uni_cols:
col = sqlite_store.database_engine.load_unicode(col)
if j in bool_cols:
return bool(col)
if j in bin_cols:
if isinstance(col, types.UnicodeType):
col = buffer(col.encode("utf8"))
return col
for i, row in enumerate(rows):
rows[i] = tuple(
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postgres_store.database_engine.encode_parameter(
conv(j, col)
)
for j, col in enumerate(row)
if j > 0
)
def ins(txn):
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postgres_store.insert_many_txn(txn, table, headers[1:], rows)
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postgres_store._simple_update_one_txn(
txn,
table="port_from_sqlite3",
keyvalues={"table_name": table},
updatevalues={"rowid": next_chunk},
)
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yield postgres_store.runInteraction("insert_many", ins)
else:
return
def setup_db(db_config, database_engine):
db_conn = database_engine.module.connect(
**{
k: v for k, v in db_config.get("args", {}).items()
if not k.startswith("cp_")
}
)
database_engine.prepare_database(db_conn)
db_conn.commit()
@defer.inlineCallbacks
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def main(sqlite_config, postgress_config):
try:
sqlite_db_pool = adbapi.ConnectionPool(
sqlite_config["name"],
**sqlite_config["args"]
)
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postgres_db_pool = adbapi.ConnectionPool(
postgress_config["name"],
**postgress_config["args"]
)
sqlite_engine = create_engine("sqlite3")
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postgres_engine = create_engine("psycopg2")
sqlite_store = Store(sqlite_db_pool, sqlite_engine)
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postgres_store = Store(postgres_db_pool, postgres_engine)
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# Step 1. Set up databases.
logger.info("Preparing sqlite database...")
setup_db(sqlite_config, sqlite_engine)
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logger.info("Preparing postgres database...")
setup_db(postgress_config, postgres_engine)
# Step 2. Get tables.
logger.info("Fetching tables...")
tables = yield sqlite_store._simple_select_onecol(
table="sqlite_master",
keyvalues={
"type": "table",
},
retcol="name",
)
logger.info("Found %d tables", len(tables))
def create_port_table(txn):
txn.execute(
"CREATE TABLE port_from_sqlite3 ("
" table_name varchar(100) NOT NULL UNIQUE,"
" rowid bigint NOT NULL"
")"
)
try:
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yield postgres_store.runInteraction(
"create_port_table", create_port_table
)
except Exception as e:
logger.info("Failed to create port table: %s", e)
# Process tables.
yield defer.gatherResults(
[
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handle_table(table, sqlite_store, postgres_store)
for table in tables
if table not in ["schema_version", "applied_schema_deltas"]
and not table.startswith("sqlite_")
],
consumeErrors=True,
)
except:
logger.exception("")
finally:
reactor.stop()
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--sqlite-database")
parser.add_argument(
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"--postgres-config", type=argparse.FileType('r'),
)
args = parser.parse_args()
logging.basicConfig(level=logging.INFO)
sqlite_config = {
"name": "sqlite3",
"args": {
"database": args.sqlite_database,
"cp_min": 1,
"cp_max": 1,
"check_same_thread": False,
},
}
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postgres_config = yaml.safe_load(args.postgres_config)
reactor.callWhenRunning(
main,
sqlite_config=sqlite_config,
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postgres_config=postgres_config,
)
reactor.run()