*sigh*

sentinel.template.conf

 port 26379
 protected-mode no
 dir /data
-sentinel-announce-ip osuredis-[[APPNAME]]-[[NODEID]].[[NAMESPACE]].svc.cluster.local
 
+sentinel announce-ip osuredis-[[APPNAME]]-[[NODEID]].[[NAMESPACE]].svc.cluster.local
 sentinel monitor [[APPNAME]] osuredis-[[APPNAME]]-0.[[NAMESPACE]].svc.cluster.local 6379 2
 sentinel down-after-milliseconds [[APPNAME]] 5000
 sentinel failover-timeout [[APPNAME]] 10000