use environment variable for watchtower hostname (helpful for multi-server setups)

romkey · romkey · commit 9aadda37e0c1 · 2024-07-31T08:05:08.000-07:00
diff --git a/watchtower/.env.example b/watchtower/.env.example
@@ -2,3 +2,4 @@ WATCHTOWER_NOTIFICATION_URL=FILL IN SLACK WEBHOOK URL HERE OR COMMENT OUT FOR NO
 TZ=America/Los_Angeles
 # sometimes servers report "could not do head request" due to rate limiting - silence those warnings
 WATCHTOWER_WARN_ON_HEAD_FAILURE=never
+WATCHTOWER_HOSTNAME=watchtower
diff --git a/watchtower/docker-compose.yml b/watchtower/docker-compose.yml
@@ -1,7 +1,7 @@
 services:
   watchtower:
     image: containrrr/watchtower
-    hostname: watchtower
+    hostname: "${WATCHTOWER_HOSTNAME}"
     container_name: watchtower
     restart: unless-stopped
     command: --schedule "0 0 4 * * *"
