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Add configurable Synapse room complexity limit variables

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This commit is contained in:
Slavi Pantaleev
2026-02-21 17:44:31 +02:00
parent 1718181ff4
commit 2c29027868
3 changed files with 22 additions and 28 deletions
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15
roles/custom/matrix-synapse/defaults/main.yml
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@@ -570,6 +570,21 @@ matrix_synapse_report_stats_endpoint: "https://matrix.org/report-usage-stats/pus
# disabling this will decrease server load significantly.
matrix_synapse_presence_enabled: true
# Controls whether remote room complexity checks are enabled when joining rooms.
# When enabled, Synapse checks a room's complexity before joining a remote room.
# Complexity is measured as `current_state_events / 500` and can prevent
# users from joining very large/active rooms on constrained servers.
matrix_synapse_limit_remote_rooms_enabled: false
# Maximum complexity allowed before join is blocked.
matrix_synapse_limit_remote_rooms_complexity: 1.0
# Error message returned when a user attempts to join a too-complex room.
matrix_synapse_limit_remote_rooms_complexity_error: "Your homeserver is unable to join rooms this large or complex. Please speak to your server administrator, or upgrade your instance to join this room."
# Allow server admins to join rooms even when they exceed the complexity limit.
matrix_synapse_limit_remote_rooms_admins_can_join: false
# Controls whether accessing the server's public rooms directory can be done without authentication.
# For private servers, you most likely wish to require authentication,
# unless you know what list of rooms you're publishing to the world and explicitly want to do it.

27
roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2
View File

@@ -452,30 +452,11 @@ admin_contact: {{ matrix_synapse_admin_contact | to_json }}
#server_context: context
# Resource-constrained homeserver settings
#
# When this is enabled, the room "complexity" will be checked before a user
# joins a new remote room. If it is above the complexity limit, the server will
# disallow joining, or will instantly leave.
#
# Room complexity is an arbitrary measure based on factors such as the number of
# users in the room.
#
limit_remote_rooms:
# Uncomment to enable room complexity checking.
#
#enabled: true
# the limit above which rooms cannot be joined. The default is 1.0.
#
#complexity: 0.5
# override the error which is returned when the room is too complex.
#
#complexity_error: "This room is too complex."
# allow server admins to join complex rooms. Default is false.
#
#admins_can_join: true
enabled: {{ matrix_synapse_limit_remote_rooms_enabled | to_json }}
complexity: {{ matrix_synapse_limit_remote_rooms_complexity | to_json }}
complexity_error: {{ matrix_synapse_limit_remote_rooms_complexity_error | to_json }}
admins_can_join: {{ matrix_synapse_limit_remote_rooms_admins_can_join | to_json }}
# Whether to require a user to be in the room to add an alias to it.
# Defaults to 'true'.