Add instructions

README.md

@@ -4,18 +4,19 @@
 
 Google Wifi doesn't obey normal ARP announcements made form metallb or other Kubernetes services. This creates a problem when trying to create port forwarding rules in Google Wifi because ingress and services never show up in the UI. 
 
-This project creates a loop that basically spoofs a packet from the ingress ip you want to advertise. Unfourtunately it's not enough to do this once, you must do it constantly or Google Wifi will try to change the forwarding rule to whatever MAC address it has. 
+This project creates a loop that basically spoofs a packet from the ingress ip you want to advertise. Unfourtunately it's not enough to do this once, you must do it constantly or Google Wifi will try to change the forwarding rule to whatever MAC address it has. It may also help to direct inbound traffic to keep the route alive. 
 
 ## Usage
 
 ### As a python script
 ```
 export HOST_IP=[IP ADDRESS TO ADVERTISE]
+export DEST_IP=8.8.8.8
 python advertise.py
 ```
 
 ### As a Docker image
-`docker run -e HOST_IP=[IP ADDRESS TO ADVERTISE] todaywasawesome/metallb-google-wifi-announce`
+`docker run -e HOST_IP=[IP ADDRESS TO ADVERTISE] DEST_IP=[DESTINATION ip, maybe use 8.8.8.8] todaywasawesome/metallb-google-wifi-announce`
 
 ### In Kubernetes, K3s etc
 Modify the [daemonset yaml](deploy/kubernetes/metallb-google-wifi-announce-daemonset.yaml) with the ip address you want to advertise then apply if with `kubectl apply -f metallb-google-wifi-announce-daemonset.yaml`

deploy/kubernetes/metallb-google-wifi-announce-daemonset.yaml

@@ -16,4 +16,6 @@ spec:
           image: todaywasawesome/metallb-google-wifi-announce:latest
           env:
           - name: HOST_IP
-            value: "10.0.0.20" #Change to whatever ip you're trying to advertise
+            value: "10.0.0.20" #Change to whatever ip you're trying to advertise
+          - name: DEST_IP
+            value: "8.8.8.8"