From efcc3d8794e35cfc2c088d235d86acc555d9228d Mon Sep 17 00:00:00 2001
From: iops <iops@syneforge.com>
Date: Sat, 6 Dec 2025 10:57:16 +0200
Subject: [PATCH] set worker_name compatible with k8s horizontal pod
 autoscaling

---
 synapse/config/workers.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/synapse/config/workers.py b/synapse/config/workers.py
index ec8ab9506bc..82bf8eae12c 100644
--- a/synapse/config/workers.py
+++ b/synapse/config/workers.py
@@ -258,7 +258,10 @@ def read_config(
                 )
             self.worker_replication_secret = worker_replication_secret
 
-        self.worker_name = config.get("worker_name", self.worker_app)
+        from os import environ
+        self.worker_name = self.worker_app
+        if self.worker_app:
+             self.worker_name = config.get("worker_name", environ.get("HOSTNAME"))
         self.instance_name = self.worker_name or MAIN_PROCESS_INSTANCE_NAME
 
         # FIXME: Remove this check after a suitable amount of time.