Need some help sorting out particulars of Nomad services and checks

Nomad
1

I’m playing with the new Nomad (as opposed to Consul) service discovery. Perhaps someone can help me sift through the particulars here?

I have a Postgres Docker container which is a task in a group with several other tasks/containers. The group is configured for network="bridge" and CNI plugins are installed and working. When I define the service and check like so:

...
  service {
    provider = "nomad"
    name = "postgres"
    port = "postgres"
  
    check {
      type = "tcp"
      port = "postgres"
      interval = "10s"
      timeout = "2s"
    }
  }
...

The alloc in the Nomad UI shows that the IP address of the service is the configured advertise address. However if I exec into the container I and look at =/proc/net/fib_trie= I see an IP address for the container which is in the usual Docker 172.26.x.x address space.

I would expect the Nomad UI to show the IP address in the Docker bridge address space and not the advertise address unless perhaps I had Postgres port (tcp/5432) configured in the port map for the Job.

Thoughts?