Instance map added.

matrix/synapse/workers.md

@@ -215,6 +215,35 @@ probably be enough for most instances.
 We could define a worker with the name streamwriter and list it under all
 streams instead of a single worker for every stream.
 
+Finally, we have to list all these workers under `instance_map`: their name
+and their replication socket:
+
+```
+instance_map:
+  main:
+    path: "/run/matrix-synapse/replication_main.sock"
+  login:
+    path: "/run/matrix-synapse/replication_login.sock"
+  federation_sender:
+    path: "/run/matrix-synapse/replication_federation_sender.sock"
+  mediaworker:
+    path: "/run/matrix-synapse/replication_mediaworker.sock"
+...
+  normal_sync1:
+    path: "unix:/run/matrix-synapse/inbound_normal_sync1.sock"
+  normal_sync2:
+    path: "unix:/run/matrix-synapse/inbound_normal_sync2.sock"
+  normal_sync3:
+    path: "unix:/run/matrix-synapse/inbound_normal_sync3.sock"
+```
+
+
+## Defining a worker
+
+
+
+
+# The rest
 
 ```
 [Unit]