Merge "use $SERVICE_HOST in multi-node doc"

Author: Jenkins

doc/source/guides/multinode-lab.rst

@@ -175,12 +175,12 @@ machines, create a ``local.conf`` with:
     SERVICE_TOKEN=xyzpdqlazydog
     DATABASE_TYPE=mysql
     SERVICE_HOST=192.168.42.11
-    MYSQL_HOST=192.168.42.11
-    RABBIT_HOST=192.168.42.11
-    GLANCE_HOSTPORT=192.168.42.11:9292
+    MYSQL_HOST=$SERVICE_HOST
+    RABBIT_HOST=$SERVICE_HOST
+    GLANCE_HOSTPORT=$SERVICE_HOST:9292
     ENABLED_SERVICES=n-cpu,n-net,n-api-meta,c-vol
     NOVA_VNC_ENABLED=True
-    NOVNCPROXY_URL="http://192.168.42.11:6080/vnc_auto.html"
+    NOVNCPROXY_URL="http://$SERVICE_HOST:6080/vnc_auto.html"
     VNCSERVER_LISTEN=$HOST_IP
     VNCSERVER_PROXYCLIENT_ADDRESS=$VNCSERVER_LISTEN