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-rw-r--r--synapse/config/workers.py50
1 files changed, 29 insertions, 21 deletions
diff --git a/synapse/config/workers.py b/synapse/config/workers.py
index 0b9789160c..5c81eb5c67 100644
--- a/synapse/config/workers.py
+++ b/synapse/config/workers.py
@@ -41,11 +41,17 @@ Synapse version. Please use ``%s: name_of_worker`` instead.
 
 _MISSING_MAIN_PROCESS_INSTANCE_MAP_DATA = """
 Missing data for a worker to connect to main process. Please include '%s' in the
-`instance_map` declared in your shared yaml configuration, or optionally(as a deprecated
-solution) in every worker's yaml as various `worker_replication_*` settings as defined
-in workers documentation here:
+`instance_map` declared in your shared yaml configuration as defined in configuration
+documentation here:
+`https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#instance_map`
+"""
+
+WORKER_REPLICATION_SETTING_DEPRECATED_MESSAGE = """
+'%s' is no longer a supported worker setting, please place '%s' onto your shared
+configuration under `main` inside the `instance_map`. See workers documentation here:
 `https://matrix-org.github.io/synapse/latest/workers.html#worker-configuration`
 """
+
 # This allows for a handy knob when it's time to change from 'master' to
 # something with less 'history'
 MAIN_PROCESS_INSTANCE_NAME = "master"
@@ -237,22 +243,37 @@ class WorkerConfig(Config):
         )
 
         # A map from instance name to host/port of their HTTP replication endpoint.
-        # Check if the main process is declared. Inject it into the map if it's not,
-        # based first on if a 'main' block is declared then on 'worker_replication_*'
-        # data. If both are available, default to instance_map. The main process
-        # itself doesn't need this data as it would never have to talk to itself.
+        # Check if the main process is declared. The main process itself doesn't need
+        # this data as it would never have to talk to itself.
         instance_map: Dict[str, Any] = config.get("instance_map", {})
 
         if self.instance_name is not MAIN_PROCESS_INSTANCE_NAME:
+            # TODO: The next 3 condition blocks can be deleted after some time has
+            #  passed and we're ready to stop checking for these settings.
             # The host used to connect to the main synapse
             main_host = config.get("worker_replication_host", None)
+            if main_host:
+                raise ConfigError(
+                    WORKER_REPLICATION_SETTING_DEPRECATED_MESSAGE
+                    % ("worker_replication_host", main_host)
+                )
 
             # The port on the main synapse for HTTP replication endpoint
             main_port = config.get("worker_replication_http_port")
+            if main_port:
+                raise ConfigError(
+                    WORKER_REPLICATION_SETTING_DEPRECATED_MESSAGE
+                    % ("worker_replication_http_port", main_port)
+                )
 
             # The tls mode on the main synapse for HTTP replication endpoint.
             # For backward compatibility this defaults to False.
             main_tls = config.get("worker_replication_http_tls", False)
+            if main_tls:
+                raise ConfigError(
+                    WORKER_REPLICATION_SETTING_DEPRECATED_MESSAGE
+                    % ("worker_replication_http_tls", main_tls)
+                )
 
             # For now, accept 'main' in the instance_map, but the replication system
             # expects 'master', force that into being until it's changed later.
@@ -262,22 +283,9 @@ class WorkerConfig(Config):
                 ]
                 del instance_map[MAIN_PROCESS_INSTANCE_MAP_NAME]
 
-            # This is the backwards compatibility bit that handles the
-            # worker_replication_* bits using setdefault() to not overwrite anything.
-            elif main_host is not None and main_port is not None:
-                instance_map.setdefault(
-                    MAIN_PROCESS_INSTANCE_NAME,
-                    {
-                        "host": main_host,
-                        "port": main_port,
-                        "tls": main_tls,
-                    },
-                )
-
             else:
                 # If we've gotten here, it means that the main process is not on the
-                # instance_map and that not enough worker_replication_* variables
-                # were declared in the worker's yaml.
+                # instance_map.
                 raise ConfigError(
                     _MISSING_MAIN_PROCESS_INSTANCE_MAP_DATA
                     % MAIN_PROCESS_INSTANCE_MAP_NAME