use TS_FUNNEL as boolean to enable funnel on TS_SERVE_PORT

README.md

@@ -22,7 +22,7 @@ Expected environment variables:
 | `TS_STATEDIR` | `/var/lib/tailscale/` | required directory for storing Tailscale state, this should be mounted to the container for persistence |
 | `TS_OPT` | `--verbose=1` | optional additional [flags](https://tailscale.com/kb/1278/tailscaled#flags-to-tailscaled) for `tailscaled` |
 | `TS_SERVE_PORT` | `8080` | optional application port to expose with [Tailscale Serve](https://tailscale.com/kb/1312/serve) |
-| `TS_FUNNEL_PORT` | `8080` | optional application port to expose **publicly** with [Tailscale Funnel](https://tailscale.com/kb/1223/funnel) |
+| `TS_FUNNEL` | `1` | if set (to anything), will proxy `TS_SERVE_PORT` **publicly** with [Tailscale Funnel](https://tailscale.com/kb/1223/funnel) |
 
 You can drop these in a `.env` file alongside your `docker-compose.yml` to load them automatically - see [.env_template](/docker-compose-example/env_template) for an example.
 

docker-compose-example/.env_template

@@ -3,4 +3,4 @@ TS_AUTHKEY=""      # Required Tailscale auth key
 TS_HOSTNAME=""      # Optional hostname for this node
 TS_OPT=""           # Optional additional arguments for tailscaled
 TS_SERVE_PORT=""    # Optional backend port to proxy with tailscale serve
-TS_FUNNEL_PORT=""  # Optional backend port to publish with tailscale funnel
+TS_FUNNEL=""        # If set, serve publicly with tailscale funnel

docker-compose-example/docker-compose.yml

@@ -8,7 +8,7 @@ services:
       TS_HOSTNAME: ${TS_HOSTNAME:-ts-docker}
       TS_STATEDIR: "/var/lib/tailscale/" # store ts state in a local volume
       TS_SERVE_PORT: ${TS_SERVE_PORT:-} # optional port to proxy with tailscale serve (ex: '80')
-      TS_FUNNEL_PORT: ${TS_FUNNEL_PORT:-} # optional port to publish publicly with tailscale funnel (ex: '80')
+      TS_FUNNEL: ${TS_FUNNEL:-} # if set, serve publicly with tailscale funnel
     volumes:
       - ./ts_data:/var/lib/tailscale/
   myservice:

image/start.sh

@@ -8,13 +8,14 @@ until tailscale up --authkey="${TS_AUTHKEY}" --hostname="${TS_HOSTNAME}"; do
 done
 tailscale status
 if [ -n "${TS_SERVE_PORT}" ]; then
+  if [ -n "${TS_FUNNEL}" ]; then
+    if ! tailscale funnel status | grep -q -A1 '(Funnel on)' | grep -q "${TS_SERVE_PORT}"; then
+      tailscale funnel --bg "${TS_SERVE_PORT}"
+    fi
+  else
     if ! tailscale serve status | grep -q "${TS_SERVE_PORT}"; then
       tailscale serve --bg "${TS_SERVE_PORT}"
     fi
   fi
-if [ -n "${TS_FUNNEL_PORT}" ]; then
-  if ! tailscale funnel status | grep -q -A1 '(Funnel on)' | grep -q "${TS_FUNNEL_PORT}"; then
-    tailscale funnel --bg "${TS_FUNNEL_PORT}"
-  fi
 fi
 wait ${PID}

k8s-example/deployment.yaml

@@ -23,8 +23,8 @@ spec:
               value: "/var/lib/tailscale"
             - name: TS_SERVE_PORT
               value: "${TS_SERVE_PORT:-}"
-            - name: TS_FUNNEL_PORT
+            - name: TS_FUNNEL
-              value: "${TS_FUNNEL_PORT:-}"
+              value: "${TS_FUNNEL:-}"
           resources:
             limits:
               memory: "128Mi"