Use direct references for configuration variables (part 5). (#10897)

48 files changed, 128 insertions, 113 deletions

diff --git a/changelog.d/10897.misc b/changelog.d/10897.misc
new file mode 100644
index 0000000000..586a0b3a96
--- /dev/null
+++ b/changelog.d/10897.misc
@@ -0,0 +1 @@
+Use direct references to config flags.
diff --git a/synapse/app/_base.py b/synapse/app/_base.py
index f657f11f76..548f6dcde9 100644
--- a/synapse/app/_base.py
+++ b/synapse/app/_base.py
@@ -88,8 +88,8 @@ def start_worker_reactor(appname, config, run_command=reactor.run):
         appname,
         soft_file_limit=config.soft_file_limit,
         gc_thresholds=config.gc_thresholds,
-        pid_file=config.worker_pid_file,
-        daemonize=config.worker_daemonize,
+        pid_file=config.worker.worker_pid_file,
+        daemonize=config.worker.worker_daemonize,
         print_pidfile=config.print_pidfile,
         logger=logger,
         run_command=run_command,
diff --git a/synapse/app/admin_cmd.py b/synapse/app/admin_cmd.py
index 259d5ec7cc..f2c5b75247 100644
--- a/synapse/app/admin_cmd.py
+++ b/synapse/app/admin_cmd.py
@@ -186,9 +186,9 @@ def start(config_options):
     config.worker.worker_app = "synapse.app.admin_cmd"
 
     if (
-        not config.worker_daemonize
-        and not config.worker_log_file
-        and not config.worker_log_config
+        not config.worker.worker_daemonize
+        and not config.worker.worker_log_file
+        and not config.worker.worker_log_config
     ):
         # Since we're meant to be run as a "command" let's not redirect stdio
         # unless we've actually set log config.
diff --git a/synapse/app/generic_worker.py b/synapse/app/generic_worker.py
index e0776689ce..3036e1b4a0 100644
--- a/synapse/app/generic_worker.py
+++ b/synapse/app/generic_worker.py
@@ -140,7 +140,7 @@ class KeyUploadServlet(RestServlet):
         self.auth = hs.get_auth()
         self.store = hs.get_datastore()
         self.http_client = hs.get_simple_http_client()
-        self.main_uri = hs.config.worker_main_http_uri
+        self.main_uri = hs.config.worker.worker_main_http_uri
 
     async def on_POST(self, request: Request, device_id: Optional[str]):
         requester = await self.auth.get_user_by_req(request, allow_guest=True)
@@ -321,7 +321,7 @@ class GenericWorkerServer(HomeServer):
                 elif name == "federation":
                     resources.update({FEDERATION_PREFIX: TransportLayerServer(self)})
                 elif name == "media":
-                    if self.config.can_load_media_repo:
+                    if self.config.media.can_load_media_repo:
                         media_repo = self.get_media_repository_resource()
 
                         # We need to serve the admin servlets for media on the
@@ -384,7 +384,7 @@ class GenericWorkerServer(HomeServer):
         logger.info("Synapse worker now listening on port %d", port)
 
     def start_listening(self):
-        for listener in self.config.worker_listeners:
+        for listener in self.config.worker.worker_listeners:
             if listener.type == "http":
                 self._listen_http(listener)
             elif listener.type == "manhole":
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index f1769f146b..205831dcda 100644
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -234,7 +234,7 @@ class SynapseHomeServer(HomeServer):
             )
 
         if name in ["media", "federation", "client"]:
-            if self.config.enable_media_repo:
+            if self.config.media.enable_media_repo:
                 media_repo = self.get_media_repository_resource()
                 resources.update(
                     {MEDIA_PREFIX: media_repo, LEGACY_MEDIA_PREFIX: media_repo}
diff --git a/synapse/config/logger.py b/synapse/config/logger.py
index bf8ca7d5fe..0a08231e5a 100644
--- a/synapse/config/logger.py
+++ b/synapse/config/logger.py
@@ -322,7 +322,9 @@ def setup_logging(
 
     """
     log_config_path = (
-        config.worker_log_config if use_worker_options else config.logging.log_config
+        config.worker.worker_log_config
+        if use_worker_options
+        else config.logging.log_config
     )
 
     # Perform one-time logging configuration.
diff --git a/synapse/crypto/context_factory.py b/synapse/crypto/context_factory.py
index d310976fe3..2a6110eb10 100644
--- a/synapse/crypto/context_factory.py
+++ b/synapse/crypto/context_factory.py
@@ -74,8 +74,8 @@ class ServerContextFactory(ContextFactory):
         context.set_options(
             SSL.OP_NO_SSLv2 | SSL.OP_NO_SSLv3 | SSL.OP_NO_TLSv1 | SSL.OP_NO_TLSv1_1
         )
-        context.use_certificate_chain_file(config.tls_certificate_file)
-        context.use_privatekey(config.tls_private_key)
+        context.use_certificate_chain_file(config.tls.tls_certificate_file)
+        context.use_privatekey(config.tls.tls_private_key)
 
         # https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
         context.set_cipher_list(
diff --git a/synapse/events/spamcheck.py b/synapse/events/spamcheck.py
index 57f1d53fa8..19ee246f96 100644
--- a/synapse/events/spamcheck.py
+++ b/synapse/events/spamcheck.py
@@ -78,7 +78,7 @@ def load_legacy_spam_checkers(hs: "synapse.server.HomeServer"):
     """
     spam_checkers: List[Any] = []
     api = hs.get_module_api()
-    for module, config in hs.config.spam_checkers:
+    for module, config in hs.config.spamchecker.spam_checkers:
         # Older spam checkers don't accept the `api` argument, so we
         # try and detect support.
         spam_args = inspect.getfullargspec(module)
diff --git a/synapse/events/third_party_rules.py b/synapse/events/third_party_rules.py
index 7a6eb3e516..d94b1bb4d2 100644
--- a/synapse/events/third_party_rules.py
+++ b/synapse/events/third_party_rules.py
@@ -42,10 +42,10 @@ def load_legacy_third_party_event_rules(hs: "HomeServer"):
     """Wrapper that loads a third party event rules module configured using the old
     configuration, and registers the hooks they implement.
     """
-    if hs.config.third_party_event_rules is None:
+    if hs.config.thirdpartyrules.third_party_event_rules is None:
         return
 
-    module, config = hs.config.third_party_event_rules
+    module, config = hs.config.thirdpartyrules.third_party_event_rules
 
     api = hs.get_module_api()
     third_party_rules = module(config=config, module_api=api)
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index 0f80dfdc43..a8c717efd5 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -277,23 +277,25 @@ class AuthHandler(BaseHandler):
         # after the SSO completes and before redirecting them back to their client.
         # It notifies the user they are about to give access to their matrix account
         # to the client.
-        self._sso_redirect_confirm_template = hs.config.sso_redirect_confirm_template
+        self._sso_redirect_confirm_template = (
+            hs.config.sso.sso_redirect_confirm_template
+        )
 
         # The following template is shown during user interactive authentication
         # in the fallback auth scenario. It notifies the user that they are
         # authenticating for an operation to occur on their account.
-        self._sso_auth_confirm_template = hs.config.sso_auth_confirm_template
+        self._sso_auth_confirm_template = hs.config.sso.sso_auth_confirm_template
 
         # The following template is shown during the SSO authentication process if
         # the account is deactivated.
         self._sso_account_deactivated_template = (
-            hs.config.sso_account_deactivated_template
+            hs.config.sso.sso_account_deactivated_template
         )
 
         self._server_name = hs.config.server.server_name
 
         # cast to tuple for use with str.startswith
-        self._whitelisted_sso_clients = tuple(hs.config.sso_client_whitelist)
+        self._whitelisted_sso_clients = tuple(hs.config.sso.sso_client_whitelist)
 
         # A mapping of user ID to extra attributes to include in the login
         # response.
diff --git a/synapse/handlers/directory.py b/synapse/handlers/directory.py
index d487fee627..5cfba3c817 100644
--- a/synapse/handlers/directory.py
+++ b/synapse/handlers/directory.py
@@ -48,7 +48,7 @@ class DirectoryHandler(BaseHandler):
         self.event_creation_handler = hs.get_event_creation_handler()
         self.store = hs.get_datastore()
         self.config = hs.config
-        self.enable_room_list_search = hs.config.enable_room_list_search
+        self.enable_room_list_search = hs.config.roomdirectory.enable_room_list_search
         self.require_membership = hs.config.require_membership_for_aliases
         self.third_party_event_rules = hs.get_third_party_event_rules()
 
@@ -143,7 +143,7 @@ class DirectoryHandler(BaseHandler):
             ):
                 raise AuthError(403, "This user is not permitted to create this alias")
 
-            if not self.config.is_alias_creation_allowed(
+            if not self.config.roomdirectory.is_alias_creation_allowed(
                 user_id, room_id, room_alias_str
             ):
                 # Lets just return a generic message, as there may be all sorts of
@@ -459,7 +459,7 @@ class DirectoryHandler(BaseHandler):
             if canonical_alias:
                 room_aliases.append(canonical_alias)
 
-            if not self.config.is_publishing_room_allowed(
+            if not self.config.roomdirectory.is_publishing_room_allowed(
                 user_id, room_id, room_aliases
             ):
                 # Lets just return a generic message, as there may be all sorts of
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 4523b25636..b17ef2a9a1 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -91,7 +91,7 @@ class FederationHandler(BaseHandler):
         self.spam_checker = hs.get_spam_checker()
         self.event_creation_handler = hs.get_event_creation_handler()
         self._event_auth_handler = hs.get_event_auth_handler()
-        self._server_notices_mxid = hs.config.server_notices_mxid
+        self._server_notices_mxid = hs.config.servernotices.server_notices_mxid
         self.config = hs.config
         self.http_client = hs.get_proxied_blacklisted_http_client()
         self._replication = hs.get_replication_data_handler()
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index ad4e4a3d6f..c66aefe2c4 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -692,10 +692,10 @@ class EventCreationHandler:
         return False
 
     async def _is_server_notices_room(self, room_id: str) -> bool:
-        if self.config.server_notices_mxid is None:
+        if self.config.servernotices.server_notices_mxid is None:
             return False
         user_ids = await self.store.get_users_in_room(room_id)
-        return self.config.server_notices_mxid in user_ids
+        return self.config.servernotices.server_notices_mxid in user_ids
 
     async def assert_accepted_privacy_policy(self, requester: Requester) -> None:
         """Check if a user has accepted the privacy policy
@@ -731,8 +731,8 @@ class EventCreationHandler:
 
         # exempt the system notices user
         if (
-            self.config.server_notices_mxid is not None
-            and user_id == self.config.server_notices_mxid
+            self.config.servernotices.server_notices_mxid is not None
+            and user_id == self.config.servernotices.server_notices_mxid
         ):
             return
 
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index 01c5e1385d..4f99f137a2 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -98,7 +98,7 @@ class RegistrationHandler(BaseHandler):
         self.macaroon_gen = hs.get_macaroon_generator()
         self._account_validity_handler = hs.get_account_validity_handler()
         self._user_consent_version = self.hs.config.consent.user_consent_version
-        self._server_notices_mxid = hs.config.server_notices_mxid
+        self._server_notices_mxid = hs.config.servernotices.server_notices_mxid
         self._server_name = hs.hostname
 
         self.spam_checker = hs.get_spam_checker()
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index b5768220d9..408b7d7b74 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -126,7 +126,7 @@ class RoomCreationHandler(BaseHandler):
         for preset_name, preset_config in self._presets_dict.items():
             encrypted = (
                 preset_name
-                in self.config.encryption_enabled_by_default_for_room_presets
+                in self.config.room.encryption_enabled_by_default_for_room_presets
             )
             preset_config["encrypted"] = encrypted
 
@@ -141,7 +141,7 @@ class RoomCreationHandler(BaseHandler):
         self._upgrade_response_cache: ResponseCache[Tuple[str, str]] = ResponseCache(
             hs.get_clock(), "room_upgrade", timeout_ms=FIVE_MINUTES_IN_MS
         )
-        self._server_notices_mxid = hs.config.server_notices_mxid
+        self._server_notices_mxid = hs.config.servernotices.server_notices_mxid
 
         self.third_party_event_rules = hs.get_third_party_event_rules()
 
@@ -757,7 +757,9 @@ class RoomCreationHandler(BaseHandler):
             )
 
         if is_public:
-            if not self.config.is_publishing_room_allowed(user_id, room_id, room_alias):
+            if not self.config.roomdirectory.is_publishing_room_allowed(
+                user_id, room_id, room_alias
+            ):
                 # Lets just return a generic message, as there may be all sorts of
                 # reasons why we said no. TODO: Allow configurable error messages
                 # per alias creation rule?
diff --git a/synapse/handlers/room_list.py b/synapse/handlers/room_list.py
index c83ff585e3..c3d4199ed1 100644
--- a/synapse/handlers/room_list.py
+++ b/synapse/handlers/room_list.py
@@ -52,7 +52,7 @@ EMPTY_THIRD_PARTY_ID = ThirdPartyInstanceID(None, None)
 class RoomListHandler(BaseHandler):
     def __init__(self, hs: "HomeServer"):
         super().__init__(hs)
-        self.enable_room_list_search = hs.config.enable_room_list_search
+        self.enable_room_list_search = hs.config.roomdirectory.enable_room_list_search
         self.response_cache: ResponseCache[
             Tuple[Optional[int], Optional[str], Optional[ThirdPartyInstanceID]]
         ] = ResponseCache(hs.get_clock(), "room_list")
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 7bb3f0bc47..1a56c82fbd 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -88,7 +88,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
         self.clock = hs.get_clock()
         self.spam_checker = hs.get_spam_checker()
         self.third_party_event_rules = hs.get_third_party_event_rules()
-        self._server_notices_mxid = self.config.server_notices_mxid
+        self._server_notices_mxid = self.config.servernotices.server_notices_mxid
         self._enable_lookup = hs.config.enable_3pid_lookup
         self.allow_per_room_profiles = self.config.allow_per_room_profiles
 
diff --git a/synapse/handlers/saml.py b/synapse/handlers/saml.py
index 185befbe9f..2fed9f377a 100644
--- a/synapse/handlers/saml.py
+++ b/synapse/handlers/saml.py
@@ -54,19 +54,18 @@ class Saml2SessionData:
 class SamlHandler(BaseHandler):
     def __init__(self, hs: "HomeServer"):
         super().__init__(hs)
-        self._saml_client = Saml2Client(hs.config.saml2_sp_config)
-        self._saml_idp_entityid = hs.config.saml2_idp_entityid
+        self._saml_client = Saml2Client(hs.config.saml2.saml2_sp_config)
+        self._saml_idp_entityid = hs.config.saml2.saml2_idp_entityid
 
-        self._saml2_session_lifetime = hs.config.saml2_session_lifetime
+        self._saml2_session_lifetime = hs.config.saml2.saml2_session_lifetime
         self._grandfathered_mxid_source_attribute = (
-            hs.config.saml2_grandfathered_mxid_source_attribute
+            hs.config.saml2.saml2_grandfathered_mxid_source_attribute
         )
         self._saml2_attribute_requirements = hs.config.saml2.attribute_requirements
-        self._error_template = hs.config.sso_error_template
 
         # plugin to do custom mapping from saml response to mxid
-        self._user_mapping_provider = hs.config.saml2_user_mapping_provider_class(
-            hs.config.saml2_user_mapping_provider_config,
+        self._user_mapping_provider = hs.config.saml2.saml2_user_mapping_provider_class(
+            hs.config.saml2.saml2_user_mapping_provider_config,
             ModuleApi(hs, hs.get_auth_handler()),
         )
 
@@ -411,7 +410,7 @@ class DefaultSamlMappingProvider:
         self._mxid_mapper = parsed_config.mxid_mapper
 
         self._grandfathered_mxid_source_attribute = (
-            module_api._hs.config.saml2_grandfathered_mxid_source_attribute
+            module_api._hs.config.saml2.saml2_grandfathered_mxid_source_attribute
         )
 
     def get_remote_user_id(
diff --git a/synapse/handlers/sso.py b/synapse/handlers/sso.py
index e044251a13..49fde01cf0 100644
--- a/synapse/handlers/sso.py
+++ b/synapse/handlers/sso.py
@@ -184,15 +184,17 @@ class SsoHandler:
         self._server_name = hs.hostname
         self._registration_handler = hs.get_registration_handler()
         self._auth_handler = hs.get_auth_handler()
-        self._error_template = hs.config.sso_error_template
-        self._bad_user_template = hs.config.sso_auth_bad_user_template
+        self._error_template = hs.config.sso.sso_error_template
+        self._bad_user_template = hs.config.sso.sso_auth_bad_user_template
         self._profile_handler = hs.get_profile_handler()
 
         # The following template is shown after a successful user interactive
         # authentication session. It tells the user they can close the window.
-        self._sso_auth_success_template = hs.config.sso_auth_success_template
+        self._sso_auth_success_template = hs.config.sso.sso_auth_success_template
 
-        self._sso_update_profile_information = hs.config.sso_update_profile_information
+        self._sso_update_profile_information = (
+            hs.config.sso.sso_update_profile_information
+        )
 
         # a lock on the mappings
         self._mapping_lock = Linearizer(name="sso_user_mapping", clock=hs.get_clock())
diff --git a/synapse/handlers/stats.py b/synapse/handlers/stats.py
index 9fc53333fc..bd3e6f2ec7 100644
--- a/synapse/handlers/stats.py
+++ b/synapse/handlers/stats.py
@@ -46,7 +46,7 @@ class StatsHandler:
         self.notifier = hs.get_notifier()
         self.is_mine_id = hs.is_mine_id
 
-        self.stats_enabled = hs.config.stats_enabled
+        self.stats_enabled = hs.config.stats.stats_enabled
 
         # The current position in the current_state_delta stream
         self.pos: Optional[int] = None
diff --git a/synapse/handlers/user_directory.py b/synapse/handlers/user_directory.py
index 8dc46d7674..b91e7cb501 100644
--- a/synapse/handlers/user_directory.py
+++ b/synapse/handlers/user_directory.py
@@ -61,7 +61,7 @@ class UserDirectoryHandler(StateDeltasHandler):
         self.notifier = hs.get_notifier()
         self.is_mine_id = hs.is_mine_id
         self.update_user_directory = hs.config.update_user_directory
-        self.search_all_users = hs.config.user_directory_search_all_users
+        self.search_all_users = hs.config.userdirectory.user_directory_search_all_users
         self.spam_checker = hs.get_spam_checker()
         # The current position in the current_state_delta stream
         self.pos: Optional[int] = None
diff --git a/synapse/logging/opentracing.py b/synapse/logging/opentracing.py
index c6c4d3bd29..03d2dd94f6 100644
--- a/synapse/logging/opentracing.py
+++ b/synapse/logging/opentracing.py
@@ -363,7 +363,7 @@ def noop_context_manager(*args, **kwargs):
 def init_tracer(hs: "HomeServer"):
     """Set the whitelists and initialise the JaegerClient tracer"""
     global opentracing
-    if not hs.config.opentracer_enabled:
+    if not hs.config.tracing.opentracer_enabled:
         # We don't have a tracer
         opentracing = None
         return
@@ -377,12 +377,12 @@ def init_tracer(hs: "HomeServer"):
     # Pull out the jaeger config if it was given. Otherwise set it to something sensible.
     # See https://github.com/jaegertracing/jaeger-client-python/blob/master/jaeger_client/config.py
 
-    set_homeserver_whitelist(hs.config.opentracer_whitelist)
+    set_homeserver_whitelist(hs.config.tracing.opentracer_whitelist)
 
     from jaeger_client.metrics.prometheus import PrometheusMetricsFactory
 
     config = JaegerConfig(
-        config=hs.config.jaeger_config,
+        config=hs.config.tracing.jaeger_config,
         service_name=f"{hs.config.server.server_name} {hs.get_instance_name()}",
         scope_manager=LogContextScopeManager(hs.config),
         metrics_factory=PrometheusMetricsFactory(),
diff --git a/synapse/replication/http/_base.py b/synapse/replication/http/_base.py
index 25589b0042..f1b78d09f9 100644
--- a/synapse/replication/http/_base.py
+++ b/synapse/replication/http/_base.py
@@ -168,8 +168,8 @@ class ReplicationEndpoint(metaclass=abc.ABCMeta):
         client = hs.get_simple_http_client()
         local_instance_name = hs.get_instance_name()
 
-        master_host = hs.config.worker_replication_host
-        master_port = hs.config.worker_replication_http_port
+        master_host = hs.config.worker.worker_replication_host
+        master_port = hs.config.worker.worker_replication_http_port
 
         instance_map = hs.config.worker.instance_map
 
diff --git a/synapse/replication/tcp/handler.py b/synapse/replication/tcp/handler.py
index 509ed7fb13..1438a82b60 100644
--- a/synapse/replication/tcp/handler.py
+++ b/synapse/replication/tcp/handler.py
@@ -322,8 +322,8 @@ class ReplicationCommandHandler:
         else:
             client_name = hs.get_instance_name()
             self._factory = DirectTcpReplicationClientFactory(hs, client_name, self)
-            host = hs.config.worker_replication_host
-            port = hs.config.worker_replication_port
+            host = hs.config.worker.worker_replication_host
+            port = hs.config.worker.worker_replication_port
             hs.get_reactor().connectTCP(host.encode(), port, self._factory)
 
     def get_streams(self) -> Dict[str, Stream]:
diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py
index a03774c98a..e1506deb2b 100644
--- a/synapse/rest/admin/__init__.py
+++ b/synapse/rest/admin/__init__.py
@@ -267,7 +267,7 @@ def register_servlets_for_client_rest_resource(
 
     # Load the media repo ones if we're using them. Otherwise load the servlets which
     # don't need a media repo (typically readonly admin APIs).
-    if hs.config.can_load_media_repo:
+    if hs.config.media.can_load_media_repo:
         register_servlets_for_media_repo(hs, http_server)
     else:
         ListMediaInRoom(hs).register(http_server)
diff --git a/synapse/rest/client/login.py b/synapse/rest/client/login.py
index 64446fc486..fa5c173f4b 100644
--- a/synapse/rest/client/login.py
+++ b/synapse/rest/client/login.py
@@ -76,7 +76,7 @@ class LoginRestServlet(RestServlet):
         self.jwt_audiences = hs.config.jwt.jwt_audiences
 
         # SSO configuration.
-        self.saml2_enabled = hs.config.saml2_enabled
+        self.saml2_enabled = hs.config.saml2.saml2_enabled
         self.cas_enabled = hs.config.cas.cas_enabled
         self.oidc_enabled = hs.config.oidc.oidc_enabled
         self._msc2918_enabled = hs.config.access_token_lifetime is not None
diff --git a/synapse/rest/client/user_directory.py b/synapse/rest/client/user_directory.py
index 8852811114..a47d9bd01d 100644
--- a/synapse/rest/client/user_directory.py
+++ b/synapse/rest/client/user_directory.py
@@ -58,7 +58,7 @@ class UserDirectorySearchRestServlet(RestServlet):
         requester = await self.auth.get_user_by_req(request, allow_guest=False)
         user_id = requester.user.to_string()
 
-        if not self.hs.config.user_directory_search_enabled:
+        if not self.hs.config.userdirectory.user_directory_search_enabled:
             return 200, {"limited": False, "results": []}
 
         body = parse_json_object_from_request(request)
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index a1a815cf82..b52a296d8f 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -42,15 +42,15 @@ class VersionsRestServlet(RestServlet):
         # Calculate these once since they shouldn't change after start-up.
         self.e2ee_forced_public = (
             RoomCreationPreset.PUBLIC_CHAT
-            in self.config.encryption_enabled_by_default_for_room_presets
+            in self.config.room.encryption_enabled_by_default_for_room_presets
         )
         self.e2ee_forced_private = (
             RoomCreationPreset.PRIVATE_CHAT
-            in self.config.encryption_enabled_by_default_for_room_presets
+            in self.config.room.encryption_enabled_by_default_for_room_presets
         )
         self.e2ee_forced_trusted_private = (
             RoomCreationPreset.TRUSTED_PRIVATE_CHAT
-            in self.config.encryption_enabled_by_default_for_room_presets
+            in self.config.room.encryption_enabled_by_default_for_room_presets
         )
 
     def on_GET(self, request: Request) -> Tuple[int, JsonDict]:
diff --git a/synapse/rest/client/voip.py b/synapse/rest/client/voip.py
index 9d46ed3af3..ea2b8aa45f 100644
--- a/synapse/rest/client/voip.py
+++ b/synapse/rest/client/voip.py
@@ -37,14 +37,14 @@ class VoipRestServlet(RestServlet):
 
     async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
         requester = await self.auth.get_user_by_req(
-            request, self.hs.config.turn_allow_guests
+            request, self.hs.config.voip.turn_allow_guests
         )
 
-        turnUris = self.hs.config.turn_uris
-        turnSecret = self.hs.config.turn_shared_secret
-        turnUsername = self.hs.config.turn_username
-        turnPassword = self.hs.config.turn_password
-        userLifetime = self.hs.config.turn_user_lifetime
+        turnUris = self.hs.config.voip.turn_uris
+        turnSecret = self.hs.config.voip.turn_shared_secret
+        turnUsername = self.hs.config.voip.turn_username
+        turnPassword = self.hs.config.voip.turn_password
+        userLifetime = self.hs.config.voip.turn_user_lifetime
 
         if turnUris and turnSecret and userLifetime:
             expiry = (self.hs.get_clock().time_msec() + userLifetime) / 1000
diff --git a/synapse/rest/media/v1/config_resource.py b/synapse/rest/media/v1/config_resource.py
index 712d4e8368..a95804d327 100644
--- a/synapse/rest/media/v1/config_resource.py
+++ b/synapse/rest/media/v1/config_resource.py
@@ -31,7 +31,7 @@ class MediaConfigResource(DirectServeJsonResource):
         config = hs.config
         self.clock = hs.get_clock()
         self.auth = hs.get_auth()
-        self.limits_dict = {"m.upload.size": config.max_upload_size}
+        self.limits_dict = {"m.upload.size": config.media.max_upload_size}
 
     async def _async_render_GET(self, request: SynapseRequest) -> None:
         await self.auth.get_user_by_req(request)
diff --git a/synapse/rest/media/v1/media_repository.py b/synapse/rest/media/v1/media_repository.py
index c1bd81100d..abd88a2d4f 100644
--- a/synapse/rest/media/v1/media_repository.py
+++ b/synapse/rest/media/v1/media_repository.py
@@ -76,16 +76,16 @@ class MediaRepository:
         self.clock = hs.get_clock()
         self.server_name = hs.hostname
         self.store = hs.get_datastore()
-        self.max_upload_size = hs.config.max_upload_size
-        self.max_image_pixels = hs.config.max_image_pixels
+        self.max_upload_size = hs.config.media.max_upload_size
+        self.max_image_pixels = hs.config.media.max_image_pixels
 
         Thumbnailer.set_limits(self.max_image_pixels)
 
-        self.primary_base_path: str = hs.config.media_store_path
+        self.primary_base_path: str = hs.config.media.media_store_path
         self.filepaths: MediaFilePaths = MediaFilePaths(self.primary_base_path)
 
-        self.dynamic_thumbnails = hs.config.dynamic_thumbnails
-        self.thumbnail_requirements = hs.config.thumbnail_requirements
+        self.dynamic_thumbnails = hs.config.media.dynamic_thumbnails
+        self.thumbnail_requirements = hs.config.media.thumbnail_requirements
 
         self.remote_media_linearizer = Linearizer(name="media_remote")
 
@@ -100,7 +100,11 @@ class MediaRepository:
         # potentially upload to.
         storage_providers = []
 
-        for clz, provider_config, wrapper_config in hs.config.media_storage_providers:
+        for (
+            clz,
+            provider_config,
+            wrapper_config,
+        ) in hs.config.media.media_storage_providers:
             backend = clz(hs, provider_config)
             provider = StorageProviderWrapper(
                 backend,
@@ -975,7 +979,7 @@ class MediaRepositoryResource(Resource):
 
     def __init__(self, hs: "HomeServer"):
         # If we're not configured to use it, raise if we somehow got here.
-        if not hs.config.can_load_media_repo:
+        if not hs.config.media.can_load_media_repo:
             raise ConfigError("Synapse is not configured to use a media repo.")
 
         super().__init__()
@@ -986,7 +990,7 @@ class MediaRepositoryResource(Resource):
         self.putChild(
             b"thumbnail", ThumbnailResource(hs, media_repo, media_repo.media_storage)
         )
-        if hs.config.url_preview_enabled:
+        if hs.config.media.url_preview_enabled:
             self.putChild(
                 b"preview_url",
                 PreviewUrlResource(hs, media_repo, media_repo.media_storage),
diff --git a/synapse/rest/media/v1/preview_url_resource.py b/synapse/rest/media/v1/preview_url_resource.py
index 128706d297..0b0c4d6469 100644
--- a/synapse/rest/media/v1/preview_url_resource.py
+++ b/synapse/rest/media/v1/preview_url_resource.py
@@ -125,14 +125,14 @@ class PreviewUrlResource(DirectServeJsonResource):
         self.auth = hs.get_auth()
         self.clock = hs.get_clock()
         self.filepaths = media_repo.filepaths
-        self.max_spider_size = hs.config.max_spider_size
+        self.max_spider_size = hs.config.media.max_spider_size
         self.server_name = hs.hostname
         self.store = hs.get_datastore()
         self.client = SimpleHttpClient(
             hs,
             treq_args={"browser_like_redirects": True},
-            ip_whitelist=hs.config.url_preview_ip_range_whitelist,
-            ip_blacklist=hs.config.url_preview_ip_range_blacklist,
+            ip_whitelist=hs.config.media.url_preview_ip_range_whitelist,
+            ip_blacklist=hs.config.media.url_preview_ip_range_blacklist,
             use_proxy=True,
         )
         self.media_repo = media_repo
@@ -150,8 +150,8 @@ class PreviewUrlResource(DirectServeJsonResource):
             or instance_running_jobs == hs.get_instance_name()
         )
 
-        self.url_preview_url_blacklist = hs.config.url_preview_url_blacklist
-        self.url_preview_accept_language = hs.config.url_preview_accept_language
+        self.url_preview_url_blacklist = hs.config.media.url_preview_url_blacklist
+        self.url_preview_accept_language = hs.config.media.url_preview_accept_language
 
         # memory cache mapping urls to an ObservableDeferred returning
         # JSON-encoded OG metadata
diff --git a/synapse/rest/media/v1/storage_provider.py b/synapse/rest/media/v1/storage_provider.py
index 6c9969e55f..289e4297f2 100644
--- a/synapse/rest/media/v1/storage_provider.py
+++ b/synapse/rest/media/v1/storage_provider.py
@@ -125,7 +125,7 @@ class FileStorageProviderBackend(StorageProvider):
 
     def __init__(self, hs: "HomeServer", config: str):
         self.hs = hs
-        self.cache_directory = hs.config.media_store_path
+        self.cache_directory = hs.config.media.media_store_path
         self.base_directory = config
 
     def __str__(self) -> str:
diff --git a/synapse/rest/media/v1/thumbnail_resource.py b/synapse/rest/media/v1/thumbnail_resource.py
index cb2f88676e..ed91ef5a42 100644
--- a/synapse/rest/media/v1/thumbnail_resource.py
+++ b/synapse/rest/media/v1/thumbnail_resource.py
@@ -53,7 +53,7 @@ class ThumbnailResource(DirectServeJsonResource):
         self.store = hs.get_datastore()
         self.media_repo = media_repo
         self.media_storage = media_storage
-        self.dynamic_thumbnails = hs.config.dynamic_thumbnails
+        self.dynamic_thumbnails = hs.config.media.dynamic_thumbnails
         self.server_name = hs.hostname
 
     async def _async_render_GET(self, request: SynapseRequest) -> None:
diff --git a/synapse/rest/media/v1/upload_resource.py b/synapse/rest/media/v1/upload_resource.py
index 39b29318bb..7dcb1428e4 100644
--- a/synapse/rest/media/v1/upload_resource.py
+++ b/synapse/rest/media/v1/upload_resource.py
@@ -41,7 +41,7 @@ class UploadResource(DirectServeJsonResource):
         self.clock = hs.get_clock()
         self.server_name = hs.hostname
         self.auth = hs.get_auth()
-        self.max_upload_size = hs.config.max_upload_size
+        self.max_upload_size = hs.config.media.max_upload_size
         self.clock = hs.get_clock()
 
     async def _async_render_OPTIONS(self, request: SynapseRequest) -> None:
diff --git a/synapse/rest/synapse/client/__init__.py b/synapse/rest/synapse/client/__init__.py
index 086c80b723..6ad558f5d1 100644
--- a/synapse/rest/synapse/client/__init__.py
+++ b/synapse/rest/synapse/client/__init__.py
@@ -50,7 +50,7 @@ def build_synapse_client_resource_tree(hs: "HomeServer") -> Mapping[str, Resourc
 
         resources["/_synapse/client/oidc"] = OIDCResource(hs)
 
-    if hs.config.saml2_enabled:
+    if hs.config.saml2.saml2_enabled:
         from synapse.rest.synapse.client.saml2 import SAML2Resource
 
         res = SAML2Resource(hs)
diff --git a/synapse/rest/synapse/client/saml2/metadata_resource.py b/synapse/rest/synapse/client/saml2/metadata_resource.py
index 64378ed57b..d8eae3970d 100644
--- a/synapse/rest/synapse/client/saml2/metadata_resource.py
+++ b/synapse/rest/synapse/client/saml2/metadata_resource.py
@@ -30,7 +30,7 @@ class SAML2MetadataResource(Resource):
 
     def __init__(self, hs: "HomeServer"):
         Resource.__init__(self)
-        self.sp_config = hs.config.saml2_sp_config
+        self.sp_config = hs.config.saml2.saml2_sp_config
 
     def render_GET(self, request: Request) -> bytes:
         metadata_xml = saml2.metadata.create_metadata_string(
diff --git a/synapse/server_notices/server_notices_manager.py b/synapse/server_notices/server_notices_manager.py
index d87a538917..cd1c5ff6f4 100644
--- a/synapse/server_notices/server_notices_manager.py
+++ b/synapse/server_notices/server_notices_manager.py
@@ -39,7 +39,7 @@ class ServerNoticesManager:
         self._server_name = hs.hostname
 
         self._notifier = hs.get_notifier()
-        self.server_notices_mxid = self._config.server_notices_mxid
+        self.server_notices_mxid = self._config.servernotices.server_notices_mxid
 
     def is_enabled(self):
         """Checks if server notices are enabled on this server.
@@ -47,7 +47,7 @@ class ServerNoticesManager:
         Returns:
             bool
         """
-        return self._config.server_notices_mxid is not None
+        return self.server_notices_mxid is not None
 
     async def send_notice(
         self,
@@ -71,9 +71,9 @@ class ServerNoticesManager:
         room_id = await self.get_or_create_notice_room_for_user(user_id)
         await self.maybe_invite_user_to_room(user_id, room_id)
 
-        system_mxid = self._config.server_notices_mxid
+        assert self.server_notices_mxid is not None
         requester = create_requester(
-            system_mxid, authenticated_entity=self._server_name
+            self.server_notices_mxid, authenticated_entity=self._server_name
         )
 
         logger.info("Sending server notice to %s", user_id)
@@ -81,7 +81,7 @@ class ServerNoticesManager:
         event_dict = {
             "type": type,
             "room_id": room_id,
-            "sender": system_mxid,
+            "sender": self.server_notices_mxid,
             "content": event_content,
         }
 
@@ -106,7 +106,7 @@ class ServerNoticesManager:
         Returns:
             room id of notice room.
         """
-        if not self.is_enabled():
+        if self.server_notices_mxid is None:
             raise Exception("Server notices not enabled")
 
         assert self._is_mine_id(user_id), "Cannot send server notices to remote users"
@@ -139,12 +139,12 @@ class ServerNoticesManager:
         # avatar, we have to use both.
         join_profile = None
         if (
-            self._config.server_notices_mxid_display_name is not None
-            or self._config.server_notices_mxid_avatar_url is not None
+            self._config.servernotices.server_notices_mxid_display_name is not None
+            or self._config.servernotices.server_notices_mxid_avatar_url is not None
         ):
             join_profile = {
-                "displayname": self._config.server_notices_mxid_display_name,
-                "avatar_url": self._config.server_notices_mxid_avatar_url,
+                "displayname": self._config.servernotices.server_notices_mxid_display_name,
+                "avatar_url": self._config.servernotices.server_notices_mxid_avatar_url,
             }
 
         requester = create_requester(
@@ -154,7 +154,7 @@ class ServerNoticesManager:
             requester,
             config={
                 "preset": RoomCreationPreset.PRIVATE_CHAT,
-                "name": self._config.server_notices_room_name,
+                "name": self._config.servernotices.server_notices_room_name,
                 "power_level_content_override": {"users_default": -10},
             },
             ratelimit=False,
@@ -178,6 +178,7 @@ class ServerNoticesManager:
             user_id: The ID of the user to invite.
             room_id: The ID of the room to invite the user to.
         """
+        assert self.server_notices_mxid is not None
         requester = create_requester(
             self.server_notices_mxid, authenticated_entity=self._server_name
         )
diff --git a/synapse/storage/databases/main/registration.py b/synapse/storage/databases/main/registration.py
index 52ef9deede..c83089ee63 100644
--- a/synapse/storage/databases/main/registration.py
+++ b/synapse/storage/databases/main/registration.py
@@ -2015,7 +2015,7 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
                 (user_id_obj.localpart, create_profile_with_displayname),
             )
 
-        if self.hs.config.stats_enabled:
+        if self.hs.config.stats.stats_enabled:
             # we create a new completed user statistics row
 
             # we don't strictly need current_token since this user really can't
diff --git a/synapse/storage/databases/main/stats.py b/synapse/storage/databases/main/stats.py
index 343d6efc92..e20033bb28 100644
--- a/synapse/storage/databases/main/stats.py
+++ b/synapse/storage/databases/main/stats.py
@@ -98,7 +98,7 @@ class StatsStore(StateDeltasStore):
 
         self.server_name = hs.hostname
         self.clock = self.hs.get_clock()
-        self.stats_enabled = hs.config.stats_enabled
+        self.stats_enabled = hs.config.stats.stats_enabled
 
         self.stats_delta_processing_lock = DeferredLock()
 
diff --git a/synapse/storage/databases/main/user_directory.py b/synapse/storage/databases/main/user_directory.py
index 7ca04237a5..90d65edc42 100644
--- a/synapse/storage/databases/main/user_directory.py
+++ b/synapse/storage/databases/main/user_directory.py
@@ -551,7 +551,7 @@ class UserDirectoryStore(UserDirectoryBackgroundUpdateStore):
         super().__init__(database, db_conn, hs)
 
         self._prefer_local_users_in_search = (
-            hs.config.user_directory_search_prefer_local_users
+            hs.config.userdirectory.user_directory_search_prefer_local_users
         )
         self._server_name = hs.config.server.server_name
 
@@ -741,7 +741,7 @@ class UserDirectoryStore(UserDirectoryBackgroundUpdateStore):
                 }
         """
 
-        if self.hs.config.user_directory_search_all_users:
+        if self.hs.config.userdirectory.user_directory_search_all_users:
             join_args = (user_id,)
             where_clause = "user_id != ?"
         else:
diff --git a/tests/handlers/test_directory.py b/tests/handlers/test_directory.py
index a0a48b564e..6a2e76ca4a 100644
--- a/tests/handlers/test_directory.py
+++ b/tests/handlers/test_directory.py
@@ -405,7 +405,9 @@ class TestCreateAliasACL(unittest.HomeserverTestCase):
         rd_config = RoomDirectoryConfig()
         rd_config.read_config(config)
 
-        self.hs.config.is_alias_creation_allowed = rd_config.is_alias_creation_allowed
+        self.hs.config.roomdirectory.is_alias_creation_allowed = (
+            rd_config.is_alias_creation_allowed
+        )
 
         return hs
 
diff --git a/tests/handlers/test_stats.py b/tests/handlers/test_stats.py
index 1ba4c05b9b..24b7ef6efc 100644
--- a/tests/handlers/test_stats.py
+++ b/tests/handlers/test_stats.py
@@ -118,7 +118,7 @@ class StatsRoomTests(unittest.HomeserverTestCase):
         self.assertEqual(len(r), 0)
 
         # Disable stats
-        self.hs.config.stats_enabled = False
+        self.hs.config.stats.stats_enabled = False
         self.handler.stats_enabled = False
 
         u1 = self.register_user("u1", "pass")
@@ -134,7 +134,7 @@ class StatsRoomTests(unittest.HomeserverTestCase):
         self.assertEqual(len(r), 0)
 
         # Enable stats
-        self.hs.config.stats_enabled = True
+        self.hs.config.stats.stats_enabled = True
         self.handler.stats_enabled = True
 
         # Do the initial population of the user directory via the background update
@@ -469,7 +469,7 @@ class StatsRoomTests(unittest.HomeserverTestCase):
         behaviour eventually to still keep current rows.
         """
 
-        self.hs.config.stats_enabled = False
+        self.hs.config.stats.stats_enabled = False
         self.handler.stats_enabled = False
 
         u1 = self.register_user("u1", "pass")
@@ -481,7 +481,7 @@ class StatsRoomTests(unittest.HomeserverTestCase):
         self.assertIsNone(self._get_current_stats("room", r1))
         self.assertIsNone(self._get_current_stats("user", u1))
 
-        self.hs.config.stats_enabled = True
+        self.hs.config.stats.stats_enabled = True
         self.handler.stats_enabled = True
 
         self._perform_background_initial_update()
diff --git a/tests/handlers/test_user_directory.py b/tests/handlers/test_user_directory.py
index ba32585a14..266333c553 100644
--- a/tests/handlers/test_user_directory.py
+++ b/tests/handlers/test_user_directory.py
@@ -451,7 +451,7 @@ class UserDirectoryTestCase(unittest.HomeserverTestCase):
         visible.
         """
         self.handler.search_all_users = True
-        self.hs.config.user_directory_search_all_users = True
+        self.hs.config.userdirectory.user_directory_search_all_users = True
 
         u1 = self.register_user("user1", "pass")
         self.register_user("user2", "pass")
@@ -607,7 +607,7 @@ class TestUserDirSearchDisabled(unittest.HomeserverTestCase):
         return hs
 
     def test_disabling_room_list(self):
-        self.config.user_directory_search_enabled = True
+        self.config.userdirectory.user_directory_search_enabled = True
 
         # First we create a room with another user so that user dir is non-empty
         # for our user
@@ -624,7 +624,7 @@ class TestUserDirSearchDisabled(unittest.HomeserverTestCase):
         self.assertTrue(len(channel.json_body["results"]) > 0)
 
         # Disable user directory and check search returns nothing
-        self.config.user_directory_search_enabled = False
+        self.config.userdirectory.user_directory_search_enabled = False
         channel = self.make_request(
             "POST", b"user_directory/search", b'{"search_term":"user2"}'
         )
diff --git a/tests/rest/admin/test_media.py b/tests/rest/admin/test_media.py
index f813866073..ce30a19213 100644
--- a/tests/rest/admin/test_media.py
+++ b/tests/rest/admin/test_media.py
@@ -43,7 +43,7 @@ class DeleteMediaByIDTestCase(unittest.HomeserverTestCase):
         self.admin_user = self.register_user("admin", "pass", admin=True)
         self.admin_user_tok = self.login("admin", "pass")
 
-        self.filepaths = MediaFilePaths(hs.config.media_store_path)
+        self.filepaths = MediaFilePaths(hs.config.media.media_store_path)
 
     def test_no_auth(self):
         """
@@ -200,7 +200,7 @@ class DeleteMediaByDateSizeTestCase(unittest.HomeserverTestCase):
         self.admin_user = self.register_user("admin", "pass", admin=True)
         self.admin_user_tok = self.login("admin", "pass")
 
-        self.filepaths = MediaFilePaths(hs.config.media_store_path)
+        self.filepaths = MediaFilePaths(hs.config.media.media_store_path)
         self.url = "/_synapse/admin/v1/media/%s/delete" % self.server_name
 
     def test_no_auth(self):
diff --git a/tests/rest/admin/test_user.py b/tests/rest/admin/test_user.py
index e79e0e1850..ee3ae9cce4 100644
--- a/tests/rest/admin/test_user.py
+++ b/tests/rest/admin/test_user.py
@@ -2473,7 +2473,7 @@ class UserMediaRestTestCase(unittest.HomeserverTestCase):
     def prepare(self, reactor, clock, hs):
         self.store = hs.get_datastore()
         self.media_repo = hs.get_media_repository_resource()
-        self.filepaths = MediaFilePaths(hs.config.media_store_path)
+        self.filepaths = MediaFilePaths(hs.config.media.media_store_path)
 
         self.admin_user = self.register_user("admin", "pass", admin=True)
         self.admin_user_tok = self.login("admin", "pass")
diff --git a/tests/rest/media/v1/test_media_storage.py b/tests/rest/media/v1/test_media_storage.py
index 44a643d506..4ae00755c9 100644
--- a/tests/rest/media/v1/test_media_storage.py
+++ b/tests/rest/media/v1/test_media_storage.py
@@ -53,7 +53,7 @@ class MediaStorageTests(unittest.HomeserverTestCase):
         self.primary_base_path = os.path.join(self.test_dir, "primary")
         self.secondary_base_path = os.path.join(self.test_dir, "secondary")
 
-        hs.config.media_store_path = self.primary_base_path
+        hs.config.media.media_store_path = self.primary_base_path
 
         storage_providers = [FileStorageProviderBackend(hs, self.secondary_base_path)]
 
diff --git a/tests/server_notices/test_resource_limits_server_notices.py b/tests/server_notices/test_resource_limits_server_notices.py
index 8701b5f7e3..7f25200a5d 100644
--- a/tests/server_notices/test_resource_limits_server_notices.py
+++ b/tests/server_notices/test_resource_limits_server_notices.py
@@ -326,7 +326,7 @@ class TestResourceLimitsServerNoticesWithRealRooms(unittest.HomeserverTestCase):
         for event in events:
             if (
                 event["type"] == EventTypes.Message
-                and event["sender"] == self.hs.config.server_notices_mxid
+                and event["sender"] == self.hs.config.servernotices.server_notices_mxid
             ):
                 notice_in_room = True