environment variable auth key

README.md

@@ -15,5 +15,4 @@ A nginx layer is added. It manages two services in independent containers at loc
 
 ## TODO
 
-- auth key as a secret
-- force reuse hostname in tailscale instead of adding suffix. Example: first start is assigned `hostname`. Then, if container is recreated, Tailscale assigns `hostname-1`
+- force reuse hostname in tailscale instead of adding suffix. Example: first container is assigned `hostname`. Then, if container is recreated, Tailscale assigns `hostname-1`. Possibly helpful [info](https://tailscale.com/kb/1111/ephemeral-nodes/#can-i-create-an-ephemeral-node-without-an-auth-key).

complex-example/docker-compose.yml

@@ -3,6 +3,8 @@ services:
   tailscale:
     build:
       context: ./tailscale
+    environment:
+      - TAILSCALE_AUTH_KEY
   nginx:
     build:
       context: ./nginx

complex-example/tailscale/start.sh

@@ -1,7 +1,9 @@
 #!/bin/ash
 echo "Starting TS daemon"
 tailscaled --tun=userspace-networking &
-sleep 5
-tailscale up --authkey=TAILSCALE_AUTH_KEY --hostname=complex-example
+PID=$!
+until tailscale up --authkey=${TAILSCALE_AUTH_KEY} --hostname=complex-example; do
+    sleep 0.1
+done
 tailscale status
-sleep infinity
+wait ${PID}

simple-example/docker-compose.yml

@@ -3,6 +3,8 @@ services:
   tailscale:
     build:
       context: ./tailscale
+    environment:
+      - TAILSCALE_AUTH_KEY
   some-service-1:
     image: nginxdemos/hello
     network_mode: "service:tailscale"

simple-example/tailscale/start.sh

@@ -1,7 +1,9 @@
 #!/bin/ash
 echo "Starting TS daemon"
 tailscaled --tun=userspace-networking &
-sleep 5
-tailscale up --authkey=TAILSCALE_AUTH_KEY --hostname=simple-docker-compose
+PID=$!
+until tailscale up --authkey=${TAILSCALE_AUTH_KEY} --hostname=complex-example; do
+    sleep 0.1
+done
 tailscale status
-sleep infinity
+wait ${PID}