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Code Issues Releases Wiki Activity

Fix MAU reaping where reserved users are specified. (#6168)

pull/6195/head
Neil Johnson 2019-10-11 09:38:26 +01:00 committed by GitHub
parent 83d86106a8
commit a0d0ba7862
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4 changed files with 115 additions and 51 deletions
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1
changelog.d/6168.bugfix Normal file
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@ -0,0 +1 @@
Fix monthly active user reaping where reserved users are specified.

6
synapse/app/homeserver.py
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@ -605,13 +605,13 @@ def run(hs):
@defer.inlineCallbacks
def generate_monthly_active_users():
current_mau_count = 0
reserved_count = 0
reserved_users = ()
store = hs.get_datastore()
if hs.config.limit_usage_by_mau or hs.config.mau_stats_only:
current_mau_count = yield store.get_monthly_active_count()
reserved_count = yield store.get_registered_reserved_users_count()
reserved_users = yield store.get_registered_reserved_users()
current_mau_gauge.set(float(current_mau_count))
registered_reserved_users_mau_gauge.set(float(reserved_count))
registered_reserved_users_mau_gauge.set(float(len(reserved_users)))
max_mau_gauge.set(float(hs.config.max_mau_value))
def start_generate_monthly_active_users():

87
synapse/storage/monthly_active_users.py
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@ -32,7 +32,6 @@ class MonthlyActiveUsersStore(SQLBaseStore):
super(MonthlyActiveUsersStore, self).__init__(None, hs)
self._clock = hs.get_clock()
self.hs = hs
self.reserved_users = ()
# Do not add more reserved users than the total allowable number
self._new_transaction(
dbconn,
@ -51,7 +50,6 @@ class MonthlyActiveUsersStore(SQLBaseStore):
txn (cursor):
threepids (list[dict]): List of threepid dicts to reserve
"""
reserved_user_list = []
for tp in threepids:
user_id = self.get_user_id_by_threepid_txn(txn, tp["medium"], tp["address"])
@ -60,10 +58,8 @@ class MonthlyActiveUsersStore(SQLBaseStore):
is_support = self.is_support_user_txn(txn, user_id)
if not is_support:
self.upsert_monthly_active_user_txn(txn, user_id)
reserved_user_list.append(user_id)
else:
logger.warning("mau limit reserved threepid %s not found in db" % tp)
self.reserved_users = tuple(reserved_user_list)
@defer.inlineCallbacks
def reap_monthly_active_users(self):
@ -74,8 +70,11 @@ class MonthlyActiveUsersStore(SQLBaseStore):
Deferred[]
"""
def _reap_users(txn):
# Purge stale users
def _reap_users(txn, reserved_users):
"""
Args:
reserved_users (tuple): reserved users to preserve
"""
thirty_days_ago = int(self._clock.time_msec()) - (1000 * 60 * 60 * 24 * 30)
query_args = [thirty_days_ago]
@ -83,20 +82,19 @@ class MonthlyActiveUsersStore(SQLBaseStore):
# Need if/else since 'AND user_id NOT IN ({})' fails on Postgres
# when len(reserved_users) == 0. Works fine on sqlite.
if len(self.reserved_users) > 0:
if len(reserved_users) > 0:
# questionmarks is a hack to overcome sqlite not supporting
# tuples in 'WHERE IN %s'
questionmarks = "?" * len(self.reserved_users)
question_marks = ",".join("?" * len(reserved_users))
query_args.extend(self.reserved_users)
sql = base_sql + """ AND user_id NOT IN ({})""".format(
",".join(questionmarks)
)
query_args.extend(reserved_users)
sql = base_sql + " AND user_id NOT IN ({})".format(question_marks)
else:
sql = base_sql
txn.execute(sql, query_args)
max_mau_value = self.hs.config.max_mau_value
if self.hs.config.limit_usage_by_mau:
# If MAU user count still exceeds the MAU threshold, then delete on
# a least recently active basis.
@ -106,12 +104,8 @@ class MonthlyActiveUsersStore(SQLBaseStore):
# While Postgres does not require 'LIMIT', but also does not support
# negative LIMIT values. So there is no way to write it that both can
# support
safe_guard = self.hs.config.max_mau_value - len(self.reserved_users)
# Must be greater than zero for postgres
safe_guard = safe_guard if safe_guard > 0 else 0
query_args = [safe_guard]
base_sql = """
if len(reserved_users) == 0:
sql = """
DELETE FROM monthly_active_users
WHERE user_id NOT IN (
SELECT user_id FROM monthly_active_users
@ -119,18 +113,43 @@ class MonthlyActiveUsersStore(SQLBaseStore):
LIMIT ?
)
"""
txn.execute(sql, (max_mau_value,))
# Need if/else since 'AND user_id NOT IN ({})' fails on Postgres
# when len(reserved_users) == 0. Works fine on sqlite.
if len(self.reserved_users) > 0:
query_args.extend(self.reserved_users)
sql = base_sql + """ AND user_id NOT IN ({})""".format(
",".join(questionmarks)
)
else:
sql = base_sql
# Must be >= 0 for postgres
num_of_non_reserved_users_to_remove = max(
max_mau_value - len(reserved_users), 0
)
# It is important to filter reserved users twice to guard
# against the case where the reserved user is present in the
# SELECT, meaning that a legitmate mau is deleted.
sql = """
DELETE FROM monthly_active_users
WHERE user_id NOT IN (
SELECT user_id FROM monthly_active_users
WHERE user_id NOT IN ({})
ORDER BY timestamp DESC
LIMIT ?
)
AND user_id NOT IN ({})
""".format(
question_marks, question_marks
)
query_args = [
*reserved_users,
num_of_non_reserved_users_to_remove,
*reserved_users,
]
txn.execute(sql, query_args)
yield self.runInteraction("reap_monthly_active_users", _reap_users)
reserved_users = yield self.get_registered_reserved_users()
yield self.runInteraction(
"reap_monthly_active_users", _reap_users, reserved_users
)
# It seems poor to invalidate the whole cache, Postgres supports
# 'Returning' which would allow me to invalidate only the
# specific users, but sqlite has no way to do this and instead
@ -159,21 +178,25 @@ class MonthlyActiveUsersStore(SQLBaseStore):
return self.runInteraction("count_users", _count_users)
@defer.inlineCallbacks
def get_registered_reserved_users_count(self):
"""Of the reserved threepids defined in config, how many are associated
def get_registered_reserved_users(self):
"""Of the reserved threepids defined in config, which are associated
with registered users?
Returns:
Defered[int]: Number of real reserved users
Defered[list]: Real reserved users
"""
count = 0
for tp in self.hs.config.mau_limits_reserved_threepids:
users = []
for tp in self.hs.config.mau_limits_reserved_threepids[
: self.hs.config.max_mau_value
]:
user_id = yield self.hs.get_datastore().get_user_id_by_threepid(
tp["medium"], tp["address"]
)
if user_id:
count = count + 1
return count
users.append(user_id)
return users
@defer.inlineCallbacks
def upsert_monthly_active_user(self, user_id):

58
tests/storage/test_monthly_active_users.py
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@ -50,6 +50,7 @@ class MonthlyActiveUsersTestCase(unittest.HomeserverTestCase):
{"medium": "email", "address": user2_email},
{"medium": "email", "address": user3_email},
]
self.hs.config.mau_limits_reserved_threepids = threepids
# -1 because user3 is a support user and does not count
user_num = len(threepids) - 1
@ -84,6 +85,7 @@ class MonthlyActiveUsersTestCase(unittest.HomeserverTestCase):
self.hs.config.max_mau_value = 0
self.reactor.advance(FORTY_DAYS)
self.hs.config.max_mau_value = 5
self.store.reap_monthly_active_users()
self.pump()
@ -147,9 +149,7 @@ class MonthlyActiveUsersTestCase(unittest.HomeserverTestCase):
self.store.reap_monthly_active_users()
self.pump()
count = self.store.get_monthly_active_count()
self.assertEquals(
self.get_success(count), initial_users - self.hs.config.max_mau_value
)
self.assertEquals(self.get_success(count), self.hs.config.max_mau_value)
self.reactor.advance(FORTY_DAYS)
self.store.reap_monthly_active_users()
@ -158,6 +158,44 @@ class MonthlyActiveUsersTestCase(unittest.HomeserverTestCase):
count = self.store.get_monthly_active_count()
self.assertEquals(self.get_success(count), 0)
def test_reap_monthly_active_users_reserved_users(self):
""" Tests that reaping correctly handles reaping where reserved users are
present"""
self.hs.config.max_mau_value = 5
initial_users = 5
reserved_user_number = initial_users - 1
threepids = []
for i in range(initial_users):
user = "@user%d:server" % i
email = "user%d@example.com" % i
self.get_success(self.store.upsert_monthly_active_user(user))
threepids.append({"medium": "email", "address": email})
# Need to ensure that the most recent entries in the
# monthly_active_users table are reserved
now = int(self.hs.get_clock().time_msec())
if i != 0:
self.get_success(
self.store.register_user(user_id=user, password_hash=None)
)
self.get_success(
self.store.user_add_threepid(user, "email", email, now, now)
)
self.hs.config.mau_limits_reserved_threepids = threepids
self.store.runInteraction(
"initialise", self.store._initialise_reserved_users, threepids
)
count = self.store.get_monthly_active_count()
self.assertTrue(self.get_success(count), initial_users)
users = self.store.get_registered_reserved_users()
self.assertEquals(len(self.get_success(users)), reserved_user_number)
self.get_success(self.store.reap_monthly_active_users())
count = self.store.get_monthly_active_count()
self.assertEquals(self.get_success(count), self.hs.config.max_mau_value)
def test_populate_monthly_users_is_guest(self):
# Test that guest users are not added to mau list
user_id = "@user_id:host"
@ -192,12 +230,13 @@ class MonthlyActiveUsersTestCase(unittest.HomeserverTestCase):
def test_get_reserved_real_user_account(self):
# Test no reserved users, or reserved threepids
count = self.store.get_registered_reserved_users_count()
self.assertEquals(self.get_success(count), 0)
users = self.get_success(self.store.get_registered_reserved_users())
self.assertEquals(len(users), 0)
# Test reserved users but no registered users
user1 = "@user1:example.com"
user2 = "@user2:example.com"
user1_email = "user1@example.com"
user2_email = "user2@example.com"
threepids = [
@ -210,8 +249,8 @@ class MonthlyActiveUsersTestCase(unittest.HomeserverTestCase):
)
self.pump()
count = self.store.get_registered_reserved_users_count()
self.assertEquals(self.get_success(count), 0)
users = self.get_success(self.store.get_registered_reserved_users())
self.assertEquals(len(users), 0)
# Test reserved registed users
self.store.register_user(user_id=user1, password_hash=None)
@ -221,8 +260,9 @@ class MonthlyActiveUsersTestCase(unittest.HomeserverTestCase):
now = int(self.hs.get_clock().time_msec())
self.store.user_add_threepid(user1, "email", user1_email, now, now)
self.store.user_add_threepid(user2, "email", user2_email, now, now)
count = self.store.get_registered_reserved_users_count()
self.assertEquals(self.get_success(count), len(threepids))
users = self.get_success(self.store.get_registered_reserved_users())
self.assertEquals(len(users), len(threepids))
def test_support_user_not_add_to_mau_limits(self):
support_user_id = "@support:test"