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Port synapse_port_db to async/await (#6718)

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* Raise an exception if there are pending background updates

So we return with a non-0 code

* Changelog

* Port synapse_port_db to async/await

* Port update_database to async/await

* Add version string to mocked homeservers

* Remove unused imports

* Convert overseen bits to async/await

* Fixup logging contexts

* Fix imports

* Add a way to print an error without raising an exception

* Incorporate review
This commit is contained in:
Brendan Abolivier 2020-01-21 19:04:58 +00:00 committed by GitHub
parent 0e68760078
commit 07124d028d
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3 changed files with 126 additions and 89 deletions
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1
changelog.d/6718.bugfix Normal file
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@ -0,0 +1 @@
Fix a bug causing the `synapse_port_db` script to return 0 in a specific error case.

20
scripts-dev/update_database
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@ -22,10 +22,12 @@ import yaml
from twisted.internet import defer, reactor
import synapse
from synapse.config.homeserver import HomeServerConfig
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.server import HomeServer
from synapse.storage import DataStore
from synapse.util.versionstring import get_version_string
logger = logging.getLogger("update_database")
@ -38,6 +40,8 @@ class MockHomeserver(HomeServer):
config.server_name, reactor=reactor, config=config, **kwargs
)
self.version_string = "Synapse/"+get_version_string(synapse)
if __name__ == "__main__":
parser = argparse.ArgumentParser(
@ -81,15 +85,17 @@ if __name__ == "__main__":
hs.setup()
store = hs.get_datastore()
@defer.inlineCallbacks
def run_background_updates():
yield store.db.updates.run_background_updates(sleep=False)
async def run_background_updates():
await store.db.updates.run_background_updates(sleep=False)
# Stop the reactor to exit the script once every background update is run.
reactor.stop()
# Apply all background updates on the database.
reactor.callWhenRunning(
lambda: run_as_background_process("background_updates", run_background_updates)
)
def run():
# Apply all background updates on the database.
defer.ensureDeferred(
run_as_background_process("background_updates", run_background_updates)
)
reactor.callWhenRunning(run)
reactor.run()

194
scripts/synapse_port_db
View File

@ -27,13 +27,16 @@ from six import string_types
import yaml
from twisted.enterprise import adbapi
from twisted.internet import defer, reactor
import synapse
from synapse.config.database import DatabaseConnectionConfig
from synapse.config.homeserver import HomeServerConfig
from synapse.logging.context import PreserveLoggingContext
from synapse.storage._base import LoggingTransaction
from synapse.logging.context import (
LoggingContext,
make_deferred_yieldable,
run_in_background,
)
from synapse.storage.data_stores.main.client_ips import ClientIpBackgroundUpdateStore
from synapse.storage.data_stores.main.deviceinbox import (
DeviceInboxBackgroundUpdateStore,
@ -61,6 +64,7 @@ from synapse.storage.database import Database, make_conn
from synapse.storage.engines import create_engine
from synapse.storage.prepare_database import prepare_database
from synapse.util import Clock
from synapse.util.versionstring import get_version_string
logger = logging.getLogger("synapse_port_db")
@ -125,6 +129,13 @@ APPEND_ONLY_TABLES = [
]
# Error returned by the run function. Used at the top-level part of the script to
# handle errors and return codes.
end_error = 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 = None
@ -177,6 +188,7 @@ class MockHomeserver:
self.clock = Clock(reactor)
self.config = config
self.hostname = config.server_name
self.version_string = "Synapse/"+get_version_string(synapse)
def get_clock(self):
return self.clock
@ -189,11 +201,10 @@ class Porter(object):
def __init__(self, **kwargs):
self.__dict__.update(kwargs)
@defer.inlineCallbacks
def setup_table(self, table):
async def setup_table(self, table):
if table in APPEND_ONLY_TABLES:
# It's safe to just carry on inserting.
row = yield self.postgres_store.db.simple_select_one(
row = await self.postgres_store.db.simple_select_one(
table="port_from_sqlite3",
keyvalues={"table_name": table},
retcols=("forward_rowid", "backward_rowid"),
@ -207,10 +218,10 @@ class Porter(object):
forward_chunk,
already_ported,
total_to_port,
) = yield self._setup_sent_transactions()
) = await self._setup_sent_transactions()
backward_chunk = 0
else:
yield self.postgres_store.db.simple_insert(
await self.postgres_store.db.simple_insert(
table="port_from_sqlite3",
values={
"table_name": table,
@ -227,7 +238,7 @@ class Porter(object):
backward_chunk = row["backward_rowid"]
if total_to_port is None:
already_ported, total_to_port = yield self._get_total_count_to_port(
already_ported, total_to_port = await self._get_total_count_to_port(
table, forward_chunk, backward_chunk
)
else:
@ -238,9 +249,9 @@ class Porter(object):
)
txn.execute("TRUNCATE %s CASCADE" % (table,))
yield self.postgres_store.execute(delete_all)
await self.postgres_store.execute(delete_all)
yield self.postgres_store.db.simple_insert(
await self.postgres_store.db.simple_insert(
table="port_from_sqlite3",
values={"table_name": table, "forward_rowid": 1, "backward_rowid": 0},
)
@ -248,16 +259,13 @@ class Porter(object):
forward_chunk = 1
backward_chunk = 0
already_ported, total_to_port = yield self._get_total_count_to_port(
already_ported, total_to_port = await self._get_total_count_to_port(
table, forward_chunk, backward_chunk
)
defer.returnValue(
(table, already_ported, total_to_port, forward_chunk, backward_chunk)
)
return table, already_ported, total_to_port, forward_chunk, backward_chunk
@defer.inlineCallbacks
def handle_table(
async def handle_table(
self, table, postgres_size, table_size, forward_chunk, backward_chunk
):
logger.info(
@ -275,7 +283,7 @@ class Porter(object):
self.progress.add_table(table, postgres_size, table_size)
if table == "event_search":
yield self.handle_search_table(
await self.handle_search_table(
postgres_size, table_size, forward_chunk, backward_chunk
)
return
@ -294,7 +302,7 @@ class Porter(object):
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.
yield self.postgres_store.db.simple_insert(
await self.postgres_store.db.simple_insert(
table=table, values={"stream_id": None}
)
self.progress.update(table, table_size) # Mark table as done
@ -335,7 +343,7 @@ class Porter(object):
return headers, forward_rows, backward_rows
headers, frows, brows = yield self.sqlite_store.db.runInteraction(
headers, frows, brows = await self.sqlite_store.db.runInteraction(
"select", r
)
@ -361,7 +369,7 @@ class Porter(object):
},
)
yield self.postgres_store.execute(insert)
await self.postgres_store.execute(insert)
postgres_size += len(rows)
@ -369,8 +377,7 @@ class Porter(object):
else:
return
@defer.inlineCallbacks
def handle_search_table(
async def handle_search_table(
self, postgres_size, table_size, forward_chunk, backward_chunk
):
select = (
@ -390,7 +397,7 @@ class Porter(object):
return headers, rows
headers, rows = yield self.sqlite_store.db.runInteraction("select", r)
headers, rows = await self.sqlite_store.db.runInteraction("select", r)
if rows:
forward_chunk = rows[-1][0] + 1
@ -438,7 +445,7 @@ class Porter(object):
},
)
yield self.postgres_store.execute(insert)
await self.postgres_store.execute(insert)
postgres_size += len(rows)
@ -476,11 +483,10 @@ class Porter(object):
return store
@defer.inlineCallbacks
def run_background_updates_on_postgres(self):
async def run_background_updates_on_postgres(self):
# Manually apply all background updates on the PostgreSQL database.
postgres_ready = (
yield self.postgres_store.db.updates.has_completed_background_updates()
await self.postgres_store.db.updates.has_completed_background_updates()
)
if not postgres_ready:
@ -489,13 +495,20 @@ class Porter(object):
self.progress.set_state("Running background updates on PostgreSQL")
while not postgres_ready:
yield self.postgres_store.db.updates.do_next_background_update(100)
postgres_ready = yield (
await self.postgres_store.db.updates.do_next_background_update(100)
postgres_ready = await (
self.postgres_store.db.updates.has_completed_background_updates()
)
@defer.inlineCallbacks
def run(self):
async def run(self):
"""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(
@ -505,21 +518,21 @@ class Porter(object):
# Check if all background updates are done, abort if not.
updates_complete = (
yield self.sqlite_store.db.updates.has_completed_background_updates()
await self.sqlite_store.db.updates.has_completed_background_updates()
)
if not updates_complete:
sys.stderr.write(
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"
)
defer.returnValue(None)
return
self.postgres_store = self.build_db_store(
self.hs_config.get_single_database()
)
yield self.run_background_updates_on_postgres()
await self.run_background_updates_on_postgres()
self.progress.set_state("Creating port tables")
@ -547,22 +560,22 @@ class Porter(object):
)
try:
yield self.postgres_store.db.runInteraction("alter_table", alter_table)
await self.postgres_store.db.runInteraction("alter_table", alter_table)
except Exception:
# On Error Resume Next
pass
yield self.postgres_store.db.runInteraction(
await self.postgres_store.db.runInteraction(
"create_port_table", create_port_table
)
# Step 2. Get tables.
self.progress.set_state("Fetching tables")
sqlite_tables = yield self.sqlite_store.db.simple_select_onecol(
sqlite_tables = await self.sqlite_store.db.simple_select_onecol(
table="sqlite_master", keyvalues={"type": "table"}, retcol="name"
)
postgres_tables = yield self.postgres_store.db.simple_select_onecol(
postgres_tables = await self.postgres_store.db.simple_select_onecol(
table="information_schema.tables",
keyvalues={},
retcol="distinct table_name",
@ -573,28 +586,34 @@ class Porter(object):
# Step 3. Figure out what still needs copying
self.progress.set_state("Checking on port progress")
setup_res = yield defer.gatherResults(
[
self.setup_table(table)
for table in tables
if table not in ["schema_version", "applied_schema_deltas"]
and not table.startswith("sqlite_")
],
consumeErrors=True,
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,
)
)
# Step 4. Do the copying.
self.progress.set_state("Copying to postgres")
yield defer.gatherResults(
[self.handle_table(*res) for res in setup_res], consumeErrors=True
await make_deferred_yieldable(
defer.gatherResults(
[run_in_background(self.handle_table, *res) for res in setup_res],
consumeErrors=True,
)
)
# Step 5. Do final post-processing
yield self._setup_state_group_id_seq()
await self._setup_state_group_id_seq()
self.progress.done()
except Exception:
except Exception as e:
global end_error_exec_info
end_error = e
end_error_exec_info = sys.exc_info()
logger.exception("")
finally:
@ -634,8 +653,7 @@ class Porter(object):
return outrows
@defer.inlineCallbacks
def _setup_sent_transactions(self):
async def _setup_sent_transactions(self):
# Only save things from the last day
yesterday = int(time.time() * 1000) - 86400000
@ -656,7 +674,7 @@ class Porter(object):
return headers, [r for r in rows if r[ts_ind] < yesterday]
headers, rows = yield self.sqlite_store.db.runInteraction("select", r)
headers, rows = await self.sqlite_store.db.runInteraction("select", r)
rows = self._convert_rows("sent_transactions", headers, rows)
@ -669,7 +687,7 @@ class Porter(object):
txn, "sent_transactions", headers[1:], rows
)
yield self.postgres_store.execute(insert)
await self.postgres_store.execute(insert)
else:
max_inserted_rowid = 0
@ -686,10 +704,10 @@ class Porter(object):
else:
return 1
next_chunk = yield self.sqlite_store.execute(get_start_id)
next_chunk = await self.sqlite_store.execute(get_start_id)
next_chunk = max(max_inserted_rowid + 1, next_chunk)
yield self.postgres_store.db.simple_insert(
await self.postgres_store.db.simple_insert(
table="port_from_sqlite3",
values={
"table_name": "sent_transactions",
@ -705,46 +723,49 @@ class Porter(object):
(size,) = txn.fetchone()
return int(size)
remaining_count = yield self.sqlite_store.execute(get_sent_table_size)
remaining_count = await self.sqlite_store.execute(get_sent_table_size)
total_count = remaining_count + inserted_rows
defer.returnValue((next_chunk, inserted_rows, total_count))
return next_chunk, inserted_rows, total_count
@defer.inlineCallbacks
def _get_remaining_count_to_port(self, table, forward_chunk, backward_chunk):
frows = yield self.sqlite_store.execute_sql(
async def _get_remaining_count_to_port(self, table, forward_chunk, backward_chunk):
frows = await self.sqlite_store.execute_sql(
"SELECT count(*) FROM %s WHERE rowid >= ?" % (table,), forward_chunk
)
brows = yield self.sqlite_store.execute_sql(
brows = await self.sqlite_store.execute_sql(
"SELECT count(*) FROM %s WHERE rowid <= ?" % (table,), backward_chunk
)
defer.returnValue(frows[0][0] + brows[0][0])
return frows[0][0] + brows[0][0]
@defer.inlineCallbacks
def _get_already_ported_count(self, table):
rows = yield self.postgres_store.execute_sql(
async def _get_already_ported_count(self, table):
rows = await self.postgres_store.execute_sql(
"SELECT count(*) FROM %s" % (table,)
)
defer.returnValue(rows[0][0])
return rows[0][0]
@defer.inlineCallbacks
def _get_total_count_to_port(self, table, forward_chunk, backward_chunk):
remaining, done = yield defer.gatherResults(
[
self._get_remaining_count_to_port(table, forward_chunk, backward_chunk),
self._get_already_ported_count(table),
],
consumeErrors=True,
async def _get_total_count_to_port(self, table, forward_chunk, backward_chunk):
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
defer.returnValue((done, remaining + done))
return done, remaining + done
def _setup_state_group_id_seq(self):
def r(txn):
@ -1010,7 +1031,12 @@ if __name__ == "__main__":
hs_config=config,
)
reactor.callWhenRunning(porter.run)
@defer.inlineCallbacks
def run():
with LoggingContext("synapse_port_db_run"):
yield defer.ensureDeferred(porter.run())
reactor.callWhenRunning(run)
reactor.run()
@ -1019,7 +1045,11 @@ if __name__ == "__main__":
else:
start()
if end_error_exec_info:
exc_type, exc_value, exc_traceback = end_error_exec_info
traceback.print_exception(exc_type, exc_value, exc_traceback)
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)