I get what advertise-addr does when initialising a docker swarm (the X.X.X.X below). But what does it do when joining a swarm as a worker with a command like:
docker swarm join --advertise-addr=18.104.22.168 --token SWMTKN-1-.... X.X.X.X:2377
I was hoping this would change the route the swarm manager used to access the node/worker but I have no idea how I can confirm this.
One way is using the traefik load balancer – it gives me a new server ip 10.0.1.138 (not the public IP) when joining the swarm but when I ping 10.0.1.138 from within the traefik container I get nothing (all other servers work).
The server I am using to join as a worker FYI is behind a CGNAT and 22.214.171.124 is a vpn address used to access it