diff --git a/changelog.d/5981.feature b/changelog.d/5981.feature
new file mode 100644
index 0000000000..e39514273d
--- /dev/null
+++ b/changelog.d/5981.feature
@@ -0,0 +1 @@
+Setting metrics_flags.known_servers to True in the configuration will publish the synapse_federation_known_servers metric over Prometheus. This represents the total number of servers your server knows about (i.e. is in rooms with), including itself.
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index 186cdbedd2..93c0edd8ce 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -958,6 +958,16 @@ account_threepid_delegates:
#sentry:
# dsn: "..."
+# Flags to enable Prometheus metrics which are not suitable to be
+# enabled by default, either for performance reasons or limited use.
+#
+metrics_flags:
+ # Publish synapse_federation_known_servers, a g auge of the number of
+ # servers this homeserver knows about, including itself. May cause
+ # performance problems on large homeservers.
+ #
+ #known_servers: true
+
# Whether or not to report anonymized homeserver usage statistics.
# report_stats: true|false
diff --git a/synapse/config/metrics.py b/synapse/config/metrics.py
index 3698441963..653b990e67 100644
--- a/synapse/config/metrics.py
+++ b/synapse/config/metrics.py
@@ -1,5 +1,6 @@
# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket 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.
@@ -13,6 +14,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
+import attr
+
from ._base import Config, ConfigError
MISSING_SENTRY = """Missing sentry-sdk library. This is required to enable sentry
@@ -20,6 +23,18 @@ MISSING_SENTRY = """Missing sentry-sdk library. This is required to enable sentr
"""
+@attr.s
+class MetricsFlags(object):
+ known_servers = attr.ib(default=False, validator=attr.validators.instance_of(bool))
+
+ @classmethod
+ def all_off(cls):
+ """
+ Instantiate the flags with all options set to off.
+ """
+ return cls(**{x.name: False for x in attr.fields(cls)})
+
+
class MetricsConfig(Config):
def read_config(self, config, **kwargs):
self.enable_metrics = config.get("enable_metrics", False)
@@ -27,6 +42,12 @@ class MetricsConfig(Config):
self.metrics_port = config.get("metrics_port")
self.metrics_bind_host = config.get("metrics_bind_host", "127.0.0.1")
+ if self.enable_metrics:
+ _metrics_config = config.get("metrics_flags") or {}
+ self.metrics_flags = MetricsFlags(**_metrics_config)
+ else:
+ self.metrics_flags = MetricsFlags.all_off()
+
self.sentry_enabled = "sentry" in config
if self.sentry_enabled:
try:
@@ -58,6 +79,16 @@ class MetricsConfig(Config):
#sentry:
# dsn: "..."
+ # Flags to enable Prometheus metrics which are not suitable to be
+ # enabled by default, either for performance reasons or limited use.
+ #
+ metrics_flags:
+ # Publish synapse_federation_known_servers, a g auge of the number of
+ # servers this homeserver knows about, including itself. May cause
+ # performance problems on large homeservers.
+ #
+ #known_servers: true
+
# Whether or not to report anonymized homeserver usage statistics.
"""
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index f8b682ebd9..4df8ebdacd 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -24,8 +24,10 @@ from canonicaljson import json
from twisted.internet import defer
from synapse.api.constants import EventTypes, Membership
+from synapse.metrics import LaterGauge
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage._base import LoggingTransaction
+from synapse.storage.engines import Sqlite3Engine
from synapse.storage.events_worker import EventsWorkerStore
from synapse.types import get_domain_from_id
from synapse.util.async_helpers import Linearizer
@@ -74,6 +76,63 @@ class RoomMemberWorkerStore(EventsWorkerStore):
self._check_safe_current_state_events_membership_updated_txn(txn)
txn.close()
+ if self.hs.config.metrics_flags.known_servers:
+ self._known_servers_count = 1
+ self.hs.get_clock().looping_call(
+ run_as_background_process,
+ 60 * 1000,
+ "_count_known_servers",
+ self._count_known_servers,
+ )
+ self.hs.get_clock().call_later(
+ 1000,
+ run_as_background_process,
+ "_count_known_servers",
+ self._count_known_servers,
+ )
+ LaterGauge(
+ "synapse_federation_known_servers",
+ "",
+ [],
+ lambda: self._known_servers_count,
+ )
+
+ @defer.inlineCallbacks
+ def _count_known_servers(self):
+ """
+ Count the servers that this server knows about.
+
+ The statistic is stored on the class for the
+ `synapse_federation_known_servers` LaterGauge to collect.
+ """
+
+ def _transact(txn):
+ if isinstance(self.database_engine, Sqlite3Engine):
+ query = """
+ SELECT COUNT(DISTINCT substr(out.user_id, pos+1))
+ FROM (
+ SELECT rm.user_id as user_id, instr(rm.user_id, ':')
+ AS pos FROM room_memberships as rm
+ INNER JOIN current_state_events as c ON rm.event_id = c.event_id
+ WHERE c.type = 'm.room.member'
+ ) as out
+ """
+ else:
+ query = """
+ SELECT COUNT(DISTINCT split_part(state_key, ':', 2))
+ FROM current_state_events
+ WHERE type = 'm.room.member' AND membership = 'join';
+ """
+ txn.execute(query)
+ return list(txn)[0][0]
+
+ count = yield self.runInteraction("get_known_servers", _transact)
+
+ # We always know about ourselves, even if we have nothing in
+ # room_memberships (for example, the server is new).
+ self._known_servers_count = max([count, 1])
+ return self._known_servers_count
+
def _check_safe_current_state_events_membership_updated_txn(self, txn):
"""Checks if it is safe to assume the new current_state_events
membership column is up to date
diff --git a/tests/config/test_generate.py b/tests/config/test_generate.py
index 5017cbce85..2684e662de 100644
--- a/tests/config/test_generate.py
+++ b/tests/config/test_generate.py
@@ -17,6 +17,8 @@ import os.path
import re
import shutil
import tempfile
+from contextlib import redirect_stdout
+from io import StringIO
from synapse.config.homeserver import HomeServerConfig
@@ -32,17 +34,18 @@ class ConfigGenerationTestCase(unittest.TestCase):
shutil.rmtree(self.dir)
def test_generate_config_generates_files(self):
- HomeServerConfig.load_or_generate_config(
- "",
- [
- "--generate-config",
- "-c",
- self.file,
- "--report-stats=yes",
- "-H",
- "lemurs.win",
- ],
- )
+ with redirect_stdout(StringIO()):
+ HomeServerConfig.load_or_generate_config(
+ "",
+ [
+ "--generate-config",
+ "-c",
+ self.file,
+ "--report-stats=yes",
+ "-H",
+ "lemurs.win",
+ ],
+ )
self.assertSetEqual(
set(["homeserver.yaml", "lemurs.win.log.config", "lemurs.win.signing.key"]),
diff --git a/tests/config/test_load.py b/tests/config/test_load.py
index 6bfc1970ad..b3e557bd6a 100644
--- a/tests/config/test_load.py
+++ b/tests/config/test_load.py
@@ -15,6 +15,8 @@
import os.path
import shutil
import tempfile
+from contextlib import redirect_stdout
+from io import StringIO
import yaml
@@ -26,7 +28,6 @@ from tests import unittest
class ConfigLoadingTestCase(unittest.TestCase):
def setUp(self):
self.dir = tempfile.mkdtemp()
- print(self.dir)
self.file = os.path.join(self.dir, "homeserver.yaml")
def tearDown(self):
@@ -94,18 +95,27 @@ class ConfigLoadingTestCase(unittest.TestCase):
)
self.assertTrue(config.enable_registration)
+ def test_stats_enabled(self):
+ self.generate_config_and_remove_lines_containing("enable_metrics")
+ self.add_lines_to_config(["enable_metrics: true"])
+
+ # The default Metrics Flags are off by default.
+ config = HomeServerConfig.load_config("", ["-c", self.file])
+ self.assertFalse(config.metrics_flags.known_servers)
+
def generate_config(self):
- HomeServerConfig.load_or_generate_config(
- "",
- [
- "--generate-config",
- "-c",
- self.file,
- "--report-stats=yes",
- "-H",
- "lemurs.win",
- ],
- )
+ with redirect_stdout(StringIO()):
+ HomeServerConfig.load_or_generate_config(
+ "",
+ [
+ "--generate-config",
+ "-c",
+ self.file,
+ "--report-stats=yes",
+ "-H",
+ "lemurs.win",
+ ],
+ )
def generate_config_and_remove_lines_containing(self, needle):
self.generate_config()
diff --git a/tests/storage/test_roommember.py b/tests/storage/test_roommember.py
index 64cb294c37..447a3c6ffb 100644
--- a/tests/storage/test_roommember.py
+++ b/tests/storage/test_roommember.py
@@ -1,5 +1,6 @@
# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket 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.
@@ -13,78 +14,129 @@
# See the License for the specific language governing permissions and
# limitations under the License.
-
-from mock import Mock
-
-from twisted.internet import defer
+from unittest.mock import Mock
from synapse.api.constants import EventTypes, Membership
from synapse.api.room_versions import RoomVersions
-from synapse.types import Requester, RoomID, UserID
+from synapse.rest.admin import register_servlets_for_client_rest_resource
+from synapse.rest.client.v1 import login, room
+from synapse.types import Requester, UserID
from tests import unittest
-from tests.utils import create_room, setup_test_homeserver
-class RoomMemberStoreTestCase(unittest.TestCase):
- @defer.inlineCallbacks
- def setUp(self):
- hs = yield setup_test_homeserver(
- self.addCleanup, resource_for_federation=Mock(), http_client=None
+class RoomMemberStoreTestCase(unittest.HomeserverTestCase):
+
+ servlets = [
+ login.register_servlets,
+ register_servlets_for_client_rest_resource,
+ room.register_servlets,
+ ]
+
+ def make_homeserver(self, reactor, clock):
+ hs = self.setup_test_homeserver(
+ resource_for_federation=Mock(), http_client=None
)
+ return hs
+
+ def prepare(self, reactor, clock, hs):
+
# We can't test the RoomMemberStore on its own without the other event
# storage logic
self.store = hs.get_datastore()
self.event_builder_factory = hs.get_event_builder_factory()
self.event_creation_handler = hs.get_event_creation_handler()
- self.u_alice = UserID.from_string("@alice:test")
- self.u_bob = UserID.from_string("@bob:test")
+ self.u_alice = self.register_user("alice", "pass")
+ self.t_alice = self.login("alice", "pass")
+ self.u_bob = self.register_user("bob", "pass")
# User elsewhere on another host
self.u_charlie = UserID.from_string("@charlie:elsewhere")
- self.room = RoomID.from_string("!abc123:test")
-
- yield create_room(hs, self.room.to_string(), self.u_alice.to_string())
-
- @defer.inlineCallbacks
def inject_room_member(self, room, user, membership, replaces_state=None):
builder = self.event_builder_factory.for_room_version(
RoomVersions.V1,
{
"type": EventTypes.Member,
- "sender": user.to_string(),
- "state_key": user.to_string(),
- "room_id": room.to_string(),
+ "sender": user,
+ "state_key": user,
+ "room_id": room,
"content": {"membership": membership},
},
)
- event, context = yield self.event_creation_handler.create_new_client_event(
- builder
+ event, context = self.get_success(
+ self.event_creation_handler.create_new_client_event(builder)
)
- yield self.store.persist_event(event, context)
+ self.get_success(self.store.persist_event(event, context))
return event
- @defer.inlineCallbacks
def test_one_member(self):
- yield self.inject_room_member(self.room, self.u_alice, Membership.JOIN)
-
- self.assertEquals(
- [self.room.to_string()],
- [
- m.room_id
- for m in (
- yield self.store.get_rooms_for_user_where_membership_is(
- self.u_alice.to_string(), [Membership.JOIN]
- )
- )
- ],
+
+ # Alice creates the room, and is automatically joined
+ self.room = self.helper.create_room_as(self.u_alice, tok=self.t_alice)
+
+ rooms_for_user = self.get_success(
+ self.store.get_rooms_for_user_where_membership_is(
+ self.u_alice, [Membership.JOIN]
+ )
)
+ self.assertEquals([self.room], [m.room_id for m in rooms_for_user])
+
+ def test_count_known_servers(self):
+ """
+ _count_known_servers will calculate how many servers are in a room.
+ """
+ self.room = self.helper.create_room_as(self.u_alice, tok=self.t_alice)
+ self.inject_room_member(self.room, self.u_bob, Membership.JOIN)
+ self.inject_room_member(self.room, self.u_charlie.to_string(), Membership.JOIN)
+
+ servers = self.get_success(self.store._count_known_servers())
+ self.assertEqual(servers, 2)
+
+ def test_count_known_servers_stat_counter_disabled(self):
+ """
+ If enabled, the metrics for how many servers are known will be counted.
+ """
+ self.assertTrue("_known_servers_count" not in self.store.__dict__.keys())
+
+ self.room = self.helper.create_room_as(self.u_alice, tok=self.t_alice)
+ self.inject_room_member(self.room, self.u_bob, Membership.JOIN)
+ self.inject_room_member(self.room, self.u_charlie.to_string(), Membership.JOIN)
+
+ self.pump(20)
+
+ self.assertTrue("_known_servers_count" not in self.store.__dict__.keys())
+
+ @unittest.override_config(
+ {"enable_metrics": True, "metrics_flags": {"known_servers": True}}
+ )
+ def test_count_known_servers_stat_counter_enabled(self):
+ """
+ If enabled, the metrics for how many servers are known will be counted.
+ """
+ # Initialises to 1 -- itself
+ self.assertEqual(self.store._known_servers_count, 1)
+
+ self.pump(20)
+
+ # No rooms have been joined, so technically the SQL returns 0, but it
+ # will still say it knows about itself.
+ self.assertEqual(self.store._known_servers_count, 1)
+
+ self.room = self.helper.create_room_as(self.u_alice, tok=self.t_alice)
+ self.inject_room_member(self.room, self.u_bob, Membership.JOIN)
+ self.inject_room_member(self.room, self.u_charlie.to_string(), Membership.JOIN)
+
+ self.pump(20)
+
+ # It now knows about Charlie's server.
+ self.assertEqual(self.store._known_servers_count, 2)
+
class CurrentStateMembershipUpdateTestCase(unittest.HomeserverTestCase):
def prepare(self, reactor, clock, homeserver):
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