diff --git a/synapse/config/server.py b/synapse/config/server.py
index 11336d7549..7a9d711669 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -19,7 +19,7 @@ import logging
import os.path
import re
from textwrap import indent
-from typing import List
+from typing import Dict, List, Optional
import attr
import yaml
@@ -246,6 +246,124 @@ class ServerConfig(Config):
# events with profile information that differ from the target's global profile.
self.allow_per_room_profiles = config.get("allow_per_room_profiles", True)
+ retention_config = config.get("retention")
+ if retention_config is None:
+ retention_config = {}
+
+ self.retention_enabled = retention_config.get("enabled", False)
+
+ retention_default_policy = retention_config.get("default_policy")
+
+ if retention_default_policy is not None:
+ self.retention_default_min_lifetime = retention_default_policy.get(
+ "min_lifetime"
+ )
+ if self.retention_default_min_lifetime is not None:
+ self.retention_default_min_lifetime = self.parse_duration(
+ self.retention_default_min_lifetime
+ )
+
+ self.retention_default_max_lifetime = retention_default_policy.get(
+ "max_lifetime"
+ )
+ if self.retention_default_max_lifetime is not None:
+ self.retention_default_max_lifetime = self.parse_duration(
+ self.retention_default_max_lifetime
+ )
+
+ if (
+ self.retention_default_min_lifetime is not None
+ and self.retention_default_max_lifetime is not None
+ and (
+ self.retention_default_min_lifetime
+ > self.retention_default_max_lifetime
+ )
+ ):
+ raise ConfigError(
+ "The default retention policy's 'min_lifetime' can not be greater"
+ " than its 'max_lifetime'"
+ )
+ else:
+ self.retention_default_min_lifetime = None
+ self.retention_default_max_lifetime = None
+
+ self.retention_allowed_lifetime_min = retention_config.get(
+ "allowed_lifetime_min"
+ )
+ if self.retention_allowed_lifetime_min is not None:
+ self.retention_allowed_lifetime_min = self.parse_duration(
+ self.retention_allowed_lifetime_min
+ )
+
+ self.retention_allowed_lifetime_max = retention_config.get(
+ "allowed_lifetime_max"
+ )
+ if self.retention_allowed_lifetime_max is not None:
+ self.retention_allowed_lifetime_max = self.parse_duration(
+ self.retention_allowed_lifetime_max
+ )
+
+ if (
+ self.retention_allowed_lifetime_min is not None
+ and self.retention_allowed_lifetime_max is not None
+ and self.retention_allowed_lifetime_min
+ > self.retention_allowed_lifetime_max
+ ):
+ raise ConfigError(
+ "Invalid retention policy limits: 'allowed_lifetime_min' can not be"
+ " greater than 'allowed_lifetime_max'"
+ )
+
+ self.retention_purge_jobs = [] # type: List[Dict[str, Optional[int]]]
+ for purge_job_config in retention_config.get("purge_jobs", []):
+ interval_config = purge_job_config.get("interval")
+
+ if interval_config is None:
+ raise ConfigError(
+ "A retention policy's purge jobs configuration must have the"
+ " 'interval' key set."
+ )
+
+ interval = self.parse_duration(interval_config)
+
+ shortest_max_lifetime = purge_job_config.get("shortest_max_lifetime")
+
+ if shortest_max_lifetime is not None:
+ shortest_max_lifetime = self.parse_duration(shortest_max_lifetime)
+
+ longest_max_lifetime = purge_job_config.get("longest_max_lifetime")
+
+ if longest_max_lifetime is not None:
+ longest_max_lifetime = self.parse_duration(longest_max_lifetime)
+
+ if (
+ shortest_max_lifetime is not None
+ and longest_max_lifetime is not None
+ and shortest_max_lifetime > longest_max_lifetime
+ ):
+ raise ConfigError(
+ "A retention policy's purge jobs configuration's"
+ " 'shortest_max_lifetime' value can not be greater than its"
+ " 'longest_max_lifetime' value."
+ )
+
+ self.retention_purge_jobs.append(
+ {
+ "interval": interval,
+ "shortest_max_lifetime": shortest_max_lifetime,
+ "longest_max_lifetime": longest_max_lifetime,
+ }
+ )
+
+ if not self.retention_purge_jobs:
+ self.retention_purge_jobs = [
+ {
+ "interval": self.parse_duration("1d"),
+ "shortest_max_lifetime": None,
+ "longest_max_lifetime": None,
+ }
+ ]
+
self.listeners = [] # type: List[dict]
for listener in config.get("listeners", []):
if not isinstance(listener.get("port", None), int):
@@ -761,6 +879,69 @@ class ServerConfig(Config):
# Defaults to `28d`. Set to `null` to disable clearing out of old rows.
#
#user_ips_max_age: 14d
+
+ # Message retention policy at the server level.
+ #
+ # Room admins and mods can define a retention period for their rooms using the
+ # 'm.room.retention' state event, and server admins can cap this period by setting
+ # the 'allowed_lifetime_min' and 'allowed_lifetime_max' config options.
+ #
+ # If this feature is enabled, Synapse will regularly look for and purge events
+ # which are older than the room's maximum retention period. Synapse will also
+ # filter events received over federation so that events that should have been
+ # purged are ignored and not stored again.
+ #
+ retention:
+ # The message retention policies feature is disabled by default. Uncomment the
+ # following line to enable it.
+ #
+ #enabled: true
+
+ # Default retention policy. If set, Synapse will apply it to rooms that lack the
+ # 'm.room.retention' state event. Currently, the value of 'min_lifetime' doesn't
+ # matter much because Synapse doesn't take it into account yet.
+ #
+ #default_policy:
+ # min_lifetime: 1d
+ # max_lifetime: 1y
+
+ # Retention policy limits. If set, a user won't be able to send a
+ # 'm.room.retention' event which features a 'min_lifetime' or a 'max_lifetime'
+ # that's not within this range. This is especially useful in closed federations,
+ # in which server admins can make sure every federating server applies the same
+ # rules.
+ #
+ #allowed_lifetime_min: 1d
+ #allowed_lifetime_max: 1y
+
+ # Server admins can define the settings of the background jobs purging the
+ # events which lifetime has expired under the 'purge_jobs' section.
+ #
+ # If no configuration is provided, a single job will be set up to delete expired
+ # events in every room daily.
+ #
+ # Each job's configuration defines which range of message lifetimes the job
+ # takes care of. For example, if 'shortest_max_lifetime' is '2d' and
+ # 'longest_max_lifetime' is '3d', the job will handle purging expired events in
+ # rooms whose state defines a 'max_lifetime' that's both higher than 2 days, and
+ # lower than or equal to 3 days. Both the minimum and the maximum value of a
+ # range are optional, e.g. a job with no 'shortest_max_lifetime' and a
+ # 'longest_max_lifetime' of '3d' will handle every room with a retention policy
+ # which 'max_lifetime' is lower than or equal to three days.
+ #
+ # The rationale for this per-job configuration is that some rooms might have a
+ # retention policy with a low 'max_lifetime', where history needs to be purged
+ # of outdated messages on a very frequent basis (e.g. every 5min), but not want
+ # that purge to be performed by a job that's iterating over every room it knows,
+ # which would be quite heavy on the server.
+ #
+ #purge_jobs:
+ # - shortest_max_lifetime: 1d
+ # longest_max_lifetime: 3d
+ # interval: 5m:
+ # - shortest_max_lifetime: 3d
+ # longest_max_lifetime: 1y
+ # interval: 24h
"""
% locals()
)
|
